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Fractional Schrödinger equation in gravitational optics Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 Alexander Iomin
This paper addresses issues surrounding the concept of fractional quantum mechanics, related to lights propagation in inhomogeneous nonlinear media, specifically restricted to a so-called gravitational optics. Besides Schrödinger–Newton equation, we have also concerned with linear and nonlinear Airy beam accelerations in flat and curved spaces and fractal photonics, related to nonlinear Schrödinger
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An analytical anisotropic compact stellar model of embedding class I Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 Lipi Baskey; Shyam Das; Farook Rahaman
A class of solutions of Einstein field equations satisfying Karmarkar embedding condition is presented which could describe static, spherical fluid configurations, and could serve as models for compact stars. The fluid under consideration has unequal principal stresses i.e. fluid is locally anisotropic. A certain physically motivated geometry of metric potential has been chosen and codependency of
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Spherically symmetric AdS black holes with smeared mass distribution Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 M. F. Mourad; M. Abdelgaber
In this paper, we study the thermodynamics properties of noncommutative NC (3 + 1)-dimensional in the spherically symmetric AdS black holes. The solution of equations of motion in AdS spacetime using a general distribution mass is studied. The results show that there exist AdS4 black holes only for the non-Gaussian distributions, while for the Gaussian distributions, Nariai numbers do not exist in
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On fractional and fractal Einstein’s field equations Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 Rami Ahmad El-Nabulsi; Alireza Khalili Golmankhaneh
In this study, Einstein’s field equations are derived based on two dissimilar frameworks: the first is based on the concepts of “fractional velocity” and “fractal action” motivated by Calcagni’s approach to fractional spacetime while the second is derived based on fractal calculus which is a generalization of ordinary calculus that include fractal sets and curves. The fractional theory displays a breakdown
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Systematic study of alpha-decay of super-heavy isotopes with Z = 120–126 Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 S. A. Seyyedi
Alpha-decay half-lives of the even–even superheavy isotopes with proton numbers 120≤Z≤126 have been calculated within the cluster model. The alpha-daughter potential was constructed by employing the density-dependent double-folding model with a realistic nucleon–nucleon interaction whose exchange part has a finite range approximation. The half-lives were calculated using Wentzel–Kramers–Brillouin (WKB)
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Impact of LHC Higgs couplings measurements on bosonic decays of the neutral Higgs sector in the scNMSSM Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 Marwa Telba; Maien Binjonaid
We analyze the Next-to-minimal supersymmetric Standard Model with Grand unification boundary conditions under current theoretical and experimental constraints. We compute the mass spectrum of the model and focus on the three lightest particles in the Higgs sector (two CP-even scalars, h1, h2 and one CP-odd, a1). The reduced couplings of such particles, singlet-doublet components, their branching ratios
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An improved E-payment protocol based on quantum blind signature without entanglement Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-20 Xiang-Lin Gou; Run-Hua Shi; Ze Shi; Kun-Chang Li
E-payment plays an important role in modern daily life, so the security problem of E-payment has been widely concerned by researchers. In a recent paper [Int. J. Theor. Phys.57, 2657 (2018)], the authors presented a trusted third-party E-payment protocol based on quantum blind signature without entanglement. In this paper, we show that there is a serious security flaw in their E-payment protocol. That
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Flexible quantum protocol for nearest private query Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-08 Aihan Yin; Ziliang Tan; Tong Chen; Weibin Lin; Qiutong Wu
Nearest private query (NPQ) allows user to query which element in the database is the nearest to his private data without revealing any private information and this query is typically used for location query services. However, the previous NPQ protocol only involved the implementation of its functions and ignored the user’s private experience. In addition, the average number of key bits obtained by
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Lorentz invariance violation and modified Hawking fermions tunneling radiation of stationary axially symmetric black holes Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-18 Z. Luo; W. F. Nie; Y. Y. Feng; X. G. Lan
Based on a higher energy scale, the dispersion relation might be corrected. Correspondingly, the Hamilton–Jacobi equation should also be modified. In this paper, we use the correction to study the fermion tunneling radiation for a Gibbons–Maeda–Garfinkle-Horowitz–Strominger (GMGHS) black hole, a Kerr–NUT black hole, and an Einstein–Maxwell–Dilaton–Axion (EMDA) black hole. The result shows that compared
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Quantum speed limit time in the presence of disturbance Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-11 S. Haseli; S. Salimi; H. Dolatkhah; A. S. Khorashad
Quantum theory sets a bound on the minimal time it takes for a system to evolve from initial state to target state. This bound is called the quantum speed limit (QSL) time. The quantum speed limit time is used to quantify the maximal speed of the quantum evolution. The quantum evolution will be faster if the quantum speed limit time decreases. In this work, we study the quantum speed limit time for
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Proceedings of the second MadAnalysis 5 workshop on LHC recasting in Korea Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-15 Jack Y. Araz; Eric Conte; Robin Ducrocq; Thomas Flacke; Benjamin Fuks; Si Hyun Jeon; Taejeong Kim; Pyungwon Ko; Seung J. Lee; Richard Ruiz; Dipan Sengupta
We document the activities performed during the second MadAnalysis 5 workshop on LHC recasting, that was organised in KIAS (Seoul, Korea) on February 12-20, 2020. We detail the implementation of 12 new ATLAS and CMS searches in the MadAnalysis 5 Public Analysis Database, and the associated validation procedures. Those searches probe the production of extra gauge and scalar/pseudoscalar bosons, supersymmetry
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Implementation of the CMS-EXO-17-030 analysis in the MadAnalysis 5 framework Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-15 Yechan Kang; Jihun Kim; Jin Choi; Soohyun Yun
We present the MadAnalysis 5 implementation and validation of the CMS-EXO-17-030 search. The search targets pair-produced resonances, each of which decaying into three jets. The results are interpreted within an R-parity violating supersymmetric (RPV SUSY) model, that predicts that pair-produced gluinos decay into three jets. This leads to a six-jet event. For this study, proton–proton collision data
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Dynamics of entanglement and population inversion of two qubits in a hybrid nonlinear system Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-15 E. M. Khalil; A.-B. A. Mohamed
An analytical solution is obtained when the Kerr medium and Stark shift are considered as nonlinear interaction terms to the system containing two-qubit and two-mode electromagnetic field from the parametric amplifier. Dynamics of the population inversion, cavity–qubit and qubit–qubit entanglements are analyzed under the unitary cavity–qubit interaction, the Kerr medium and the Stark shift. The population
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Review of combined measurements of Higgs boson production and decay using up to 80 fb−1 of proton–proton collision data at s = 13 TeV collected with the ATLAS experiment Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-17 Hongtao Yang
The combined measurements of Higgs boson production and decay are performed based on up to 80 fb−1 of proton–proton collision data collected at s = 13 TeV by the ATLAS detector. The overall signal strength, defined as measured signal yield divided by the Standard Model prediction, is 1.11−0.08+0.09. The inclusive and differential cross-sections of gluon–gluon fusion, vector-boson fusion, associated
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Demise of Unruh radiation Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 R. F. O’Connell
Unruh radiation has attracted much interest, particularly because of its relationship to Hawking radiation. But its existence has been challenged by a variety of authors, including ourselves [Phys. Lett. A158, 31 (1991)]. The absence of a consensus may be traced to the complex challenge of dealing with the infinite number of particles of the associated heat bath. Here, we show how this problem may
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Examining the weak cosmic censorship conjecture by gedanken experiments for an Einstein–Maxwell–Dilaton–Axion black hole Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-23 Hai-Feng Ding; Xiang-Hua Zhai
In the framework of the new version of the gedanken experiments proposed by Sorce and Wald, we investigate the weak cosmic censorship conjecture (WCCC) for an Einstein–Maxwell–Dilaton–Axion (EMDA) black hole. Our result shows that no violations of WCCC can occur with the increase of the background solution parameters for this near-extremal EMDA black hole when the second-order correction of the perturbations
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Does holographic equipartition demand a pure cosmological constant? Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-23 P. B. Krishna; Titus K. Mathew
The spacial expansion of the universe could be described as a tendency for satisfying holographic equipartition which inevitably demands the presence of dark energy. We explore whether this novel idea proposed by Padmanabhan gives any additional insights into the nature of dark energy. In particular, we obtain the constraints imposed by the law of emergence on the equation of state parameter, ω. We
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On the temporal evolution of particle production in f(T) gravity Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-11 Sanjay Mandal; P. K. Sahoo
The thermodynamical study of the universe allows particle production in modified f(T) (T is the torsion scalar) theory of gravity within a flat FLRW framework for line element. The torsion scalar T plays the same role as the Ricci scalar R in the modified theories of gravity. We derived the f(T) gravity models by taking f(T) as the sum of T and an arbitrary function of T with three different arbitrary
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Modified Chaplygin gas with viscous fluid in FRW cosmology Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 S. Surendra Singh; Koijam Manihar Singh; Leishingam Kumrah
Considering the modified viscous Chaplygin gas as the form of dark energy contained in the Universe, we study the interaction of dark energy with other components like electromagnetic field comprising the Universe. It is incidentally found that the interaction effect behaves like the electric charge from an electromagnetic field showing the possibility that a part of the dark energy can be utilized
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Phantom dark energy from scalar-torsion coupling Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-17 Nikodem J. Popławski
We show that a scalar field without a kinetic term in the Lagrangian density, coupled to the covariant divergence of the torsion vector in the Einstein–Cartan theory of gravity, becomes kinetic in its general-relativistic equivalent formulation. The resulting kinetic term is negative: such a scalar field could be a source of phantom dark energy.
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The effect of bulk dimension in the presence of string cloud on viscosity bound Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-11 Mehdi Sadeghi
In this paper, the Einstein AdS black brane solution in the presence of a string cloud in the context of d-dimensional massive gravity is introduced. The ratio of shear viscosity to entropy density for this solution violates the KSS bound by applying the Dirichlet boundary and regularity on the horizon conditions. Our result shows that this value is independent of string cloud in any arbitrary dimensions
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Cyclic quantum teleportation via GHZ-like state Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-23 Vikram Verma
Following the work of Chen et al. [Quantum Inf. Process.16, 201 (2017)] and Zhang [Mod. Phys. Lett. A34, 1950290 (2019)], we propose a scheme for cyclic quantum teleportation (CYQT) in which three participants Alice, Bob and Charlie can teleport three arbitrary single-qubit information states cyclically among themselves by using GHZ-like states. Chen et al. and Zhang proposed schemes for CYQT and bidirectional
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Implementation of the CMS-EXO-19-002 search in the MadAnalysis 5 framework (physics beyond the Standard Model with multilepton final states; 137 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-15 Eric Conte; Robin Ducrocq
In this paper, we present the MadAnalysis 5 implementation of the CMS-EXO-19-002 analysis, probing an excess of events featuring multiple charged leptons in LHC proton–proton collisions at s=13TeV. The original analysis is based on data acquired by the CMS detector during the 2016–2018 campaign, which corresponds to an integrated luminosity of 137 fb−1. Data have been tested against hypothetical extensions
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Implementation of the ATLAS-SUSY-2018-04 analysis in the MadAnalysis 5 framework (staus in the di-tau plus missing transverse energy channel; 139 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-12 Jongwon Lim; Chih-Ting Lu; Jae-Hyeon Park; Jiwon Park
We present the MadAnalysis 5 implementation and validation of the ATLAS-SUSY-2018-04 search. This ATLAS analysis targets direct stau production in events with two hadronic tau leptons, and probes 139 fb−1 of LHC proton–proton collisions at a center-of-mass energy of 13 TeV. The validation of our re-implementation relies on a comparison of our cutflow predictions with the auxiliary material and official
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Two quantum private query protocols based on Bell states and single photons Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-12 Dong-Mei Liu; Li-Li Yan; Yan Chang; Shi-Bin Zhang; Tian Cao
This paper proposes two quantum privacy query protocols. In the single vector sub-privacy query of protocol 1, it is proposed for the first time to distinguish different measurement results by publishing 2 bits of classic information. In the protocol, the database Bob selects the Z base and the Bell base to measure the particles sent by Alice according to the key value of the encrypted database and
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Some specific wormhole solutions in f(R)-modified gravity theory Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-08 Bikram Ghosh; Saugata Mitra; Subenoy Chakraborty
The paper deals with the static spherically symmetric wormhole solutions in f(R)-modified gravity theory with anisotropic matter field and for some particular choices for the shape functions. This work may be considered as an extension of the general formalism in [S. Halder, S. Bhattacharya and S. Chakraborty, Phys. Lett. B791, 270 (2019)] for finding wormhole solutions. For isotropic matter distribution
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Quantum teleportation of an arbitrary four-qubit state via three-uniform state of eight qubits Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-08 Zhanli Cao; Yunguang Zhang; JianXia Qi
Recently, Zang et al. constructed a three-uniform state of eight qubits. In this work, we show that such an eight-qubit entangled state can be used to realize the deterministic quantum teleportation of an arbitrary four-qubit state based on the orthogonal basis measurement.
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The full vertex functions constrained by the longitudinal and transverse Ward–Takahashi identities in massless QED3 theory Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-08 Yang Yu; Jian-Feng Li
In this paper, we find apart from the Ward–Takahashi (WT) identity, the identity between gamma matrices can also constrain the vertex functions in low-dimensional gauge theories. In (1 + 1) dimensions, the identity between gamma matrices gives the identity between vector and axial-vector vertex functions while in (2 + 1) dimensions it leads to the identity between vector and tensor vertex functions
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Features of an analytical solution in Eddington inspired Born–Infeld (EiBI) gravity Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-06 Mithun Ghosh
Recently, Harko et al. [Phys. Rev. D88, 044032 (2013)] have derived an exact solution of the spherically symmetric field equations in EiBI gravity, describing a compact star with decreasing pressure but increasing energy density. We have explored some features of this solution by restricting the range of the parameter κ which satisfies four energy conditions for 10 equation of states (EOSs). Viability
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Chiral gauge leptoquark mass limits and branching ratios of KL0,B0,Bs → li+lj− decays with account of the general fermion mixing in leptoquark currents Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-06 M. V. Martynov; A. D. Smirnov
The contributions of the chiral gauge leptoquarks VL,R induced by the chiral four-color quark–lepton symmetry to the branching ratios of KL0,B0,Bs→l1l2 decays are calculated and analyzed using the general parametrizations of the fermion mixing matrices in the leptoquark currents. From the current experimental data on these decays under assumption mVL≪mVR, the lower mass limit mVLcosγL>5.68TeV is found
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Longitudinal Doppler effect in de Sitter expanding universe Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-06 Ion I. Cotăescu
A new redshift formula is obtained considering the longitudinal Doppler effect in the de Sitter expanding universe where the relative geodesic motion is governed by the Lorentzian isometries of our new de Sitter relativity [I. I. Cotăescu, Eur. Phys. J. C77, 485 (2017)]. This formula combines in a nontrivial manner the well-known cosmological contribution given by Lamaître’s law with that of the relative
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Tripartite quantum operation sharing with six-qubit highly entangled state Mod. Phys. Lett. A (IF 1.391) Pub Date : 2021-01-06 Zhanjun Zhang
A three-party scheme for sharing an arbitrary single-qubit operation on a distant target qubit is proposed by first utilizing a six-qubit genuinely entangled state presented by [Borras et al., J. Phys. A40, 13407 (2007)]. The security of the scheme is simply analyzed and ensured. The essential role which the state in the given qubit distribution plays in the QOS task is revealed. The important features
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Trace dynamics, and a ground state in spontaneous quantum gravity Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-31 Abhinash Kumar Roy; Anmol Sahu; Tejinder P. Singh
We have recently proposed a Lagrangian in trace dynamics to describe a possible unification of gravity, Yang–Mills fields, and fermions, at the Planck scale. This Lagrangian for the unified entity — called the aikyon — is invariant under global unitary transformations, and as a result possesses a novel conserved charge, known as the Adler–Millard charge. In this paper, we derive an eigenvalue equation
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Numerical study of the SWKB condition of novel classes of exactly solvable systems Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-31 Yuta Nasuda; Nobuyuki Sawado
The supersymmetric WKB (SWKB) condition is supposed to be exact for all known exactly solvable quantum mechanical systems with the shape invariance. Recently, it was claimed that the SWKB condition was not exact for the extended radial oscillator, whose eigenfunctions consisted of the exceptional orthogonal polynomial, even the system possesses the shape invariance. In this paper, we examine the SWKB
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Study of some cosmological parameters in logarithmic corrected f(R) gravitational model with swampland conjectures Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-31 J. Sadeghi; E. Naghd Mezerji; S. Noori Gashti
In this paper, we use corrected f(R) gravitational model which is a polynomial function with a logarithmic term. We employ the slow-roll conditions and obtain the number of cosmological parameters. This helps us to verify the swampland conjectures which guarantees validation of low energy quantum field theory. The obtained results show that the corresponding model is consistent with the swampland conjectures
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Cosmic-ray antiprotons in the AMS-02 era: A sensitive probe of dark matter Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 Jan Heisig
Cosmic-ray antiprotons are a powerful tool for astroparticle physics. While the bulk of measured antiprotons is consistent with a secondary origin, the precise data of the AMS-02 experiment provides us with encouraging prospects to search for a subdominant primary component, e.g. from dark matter. In this brief review, we discuss recent limits on heavy dark matter as well as a tentative signal from
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Implementation of the CMS-SUS-19-006 analysis in the MadAnalysis 5 framework (supersymmetry with large hadronic activity and missing transverse energy; 137 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 Malte Mrowietz; Sam Bein; Jory Sonneveld
We present the MadAnalysis 5 implementation and validation of the analysis Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum (CMS-SUS-19-006). The search targets signatures with at least two jets and large missing transverse momentum in the all-hadronic final state. The analyzed luminosity is 137 fb−1, corresponding to the Run 2
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Implementation of the CMS-TOP-18-003 analysis in the MadAnalysis 5 framework (four top quarks with at least two leptons; 137 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 Luc Darmé; Benjamin Fuks
We present the implementation in MadAnalysis 5 of the CMS-TOP-18-003 search for the production of four top quarks in the Standard Model and detail the validation of this implementation. This CMS analysis studies Standard Model four-top production through the same-sign and multi-lepton plus jets channels, using a luminosity of 137 fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV
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Implementation of the ATLAS-SUSY-2018-31 analysis in the MadAnalysis 5 framework (sbottoms with multi-bottoms and missing transverse energy; 139 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 Jack Y. Araz; Benjamin Fuks
We present the implementation, in the MadAnalysis 5 framework, of the ATLAS-SUSY-2018-31 search for new physics, and document the validation of this implementation. This analysis targets, with 139 fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector between 2015 and 2018, the production of a pair of supersymmetric bottom squarks when they further decay
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Testing dissipative dark matter in causal thermodynamics Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-30 Norman Cruz; Esteban González; Guillermo Palma
In this paper we study the consistency of a cosmological model representing a universe filled with a one-component dissipative dark matter fluid, in the framework of the causal Israel–Stewart theory, where a general expression arising from perturbation analysis for the relaxation time τ is used. This model is described by an exact analytic solution recently found in [N. Cruz, E. González and G. Palma
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Implementation of the ATLAS-SUSY-2018-32 analysis (sleptons and eletroweakinos with two leptons and missing transverse energy; 139 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-18 Jack Y. Araz; Benjamin Fuks
We present the implementation in MadAnalysis 5 of the ATLAS-SUSY-2018-32 search for new physics and document the validation of this re-implementation. This analysis targets, with 139 fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector, the electroweak pair production of supersymmetric charginos and sleptons when they further decay into a final state
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Implementation of the ATLAS-SUSY-2019-08 analysis in the MadAnalysis 5 framework (electroweakinos with a Higgs decay into a bb̄ pair, one lepton and missing transverse energy; 139 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-18 Mark D. Goodsell
This is the validation note for the recast in MadAnalysis 5 of the study ATLAS-SUSY-2019-08: a search for direct production of electroweakinos in final states with one lepton, missing transverse momentum and a Higgs boson decaying into two b-jets in pp collisions at s = 13 TeV with the ATLAS detector, using an integrated luminosity of 139 fb−1. The recasting code is validated against cutflows and expected
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Kink–antikink scattering-induced breathing bound states and oscillons in a parametrized ϕ4 model Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-18 F. Naha Nzoupe; Alain M. Dikandé; C. Tchawoua
Recent studies have emphasized the important role that a shape deformability of scalar-field models pertaining to the same class with the standard ϕ4 field, can play in controlling the production of a specific type of breathing bound states so-called oscillons. In the context of cosmology, the built-in mechanism of oscillons suggests that they can affect the standard picture of scalar ultra-light dark
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Apparent superluminal velocities and random walk in the velocity space Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-18 Abhijit Sen; Zurab K. Silagadze
We conjecture that the random walk and the corresponding diffusion in the relativistic velocity space is an adequate method for describing the acceleration process in relativistic jets. Considering a simple toy model, the main features of diffusion in the velocity space are demonstrated in both non-relativistic and relativistic regimes.
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The spin-one DKP equation with a nonminimal vector interaction in the presence of minimal uncertainty in momentum Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-18 B. Hamil; B. C. Lütfüoğlu; H. Aounallah
In this work, we consider the relativistic Duffin–Kemmer–Petiau equation for spin-one particles with a nonminimal vector interaction in the presence of minimal uncertainty in momentum. By using the position space representation, we exactly determine the bound-states spectrum and the corresponding eigenfunctions. We discuss the effects of the deformation and nonminimal vector coupling parameters on
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Charge-dependent flow as evidence of strong electromagnetic fields in heavy-ion collisions Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-13 Andrea Dubla; Umut Gürsoy; Raimond Snellings
The extremely large electromagnetic fields generated in heavy-ion collisions provide access to novel observables that are expected to constrain various key transport properties of the quark-gluon plasma and could help solve one of the outstanding puzzles in QCD: the strong CP problem. In this review we present a brief overview of the theoretical and experimental characterization of these electromagnetic
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Numerical solutions to Giovannini’s parton branching equation up to TeV energies at the LHC Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-09 Z. Ong; P. Agarwal; H. W. Ang; A. H. Chan; C. H. Oh
The full Giovannini parton branching equation is integrated numerically using the fourth-order Runge-Kutta method. Using a simple hadronization model, a charged-hadron multiplicity distribution is obtained. This model is then fitted to various experimental data up to the TeV scale to study how the Giovannini parameters vary with collision energy and type. The model is able to describe hadronic collisions
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From dipole spinors to a new class of mass dimension one fermions Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-30 R. J. Bueno Rogerio
In this paper, we investigate a quite recent new class of spin one-half fermions, namely Ahluwalia class-7 spinors, endowed with mass dimensionality 1 rather than 3/2, being candidates to describe dark matter. Such spinors, under the Dirac adjoint structure, belongs to the Lounesto’s class-6, namely, dipole spinors. Up to our knowledge, dipole spinor fields have Weyl spinor fields as their most known
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The Gervais–Neveu gauge in presence of a constant magnetic background Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-18 Igor Pesando; Federico Piola
We compare the gauge fixed Abelian Dirac-Born-Infeld action with string amplitudes in presence of a constant magnetic background in order to find the mapping between QFT polarizations and string polarizations, and to extract the gauge suggested by string theory in presence of a constant magnetic background, which generalizes the Gervais–Neveu gauge.
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Quaternionic electrodynamics Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-02 Sergio Giardino
We develop a quaternionic electrodynamics and show that it naturally supports the existence of magnetic monopoles. We obtained the field equations, the continuity equation, the electrodynamic force law, the Poynting vector, the energy conservation, and the stress-energy tensor. The formalism also enabled us to generalize the Dirac monopole and the charge quantization rule.
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On the stability of two-flavor and three-flavor quark matter in quark stars within the framework of NJL model Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-30 Qianyi Wang; Tong Zhao; Hongshi Zong
Following our recently proposed self-consistent mean field approximation approach, we have done some researches on the chiral phase transition of strong interaction matter within the framework of Nambu-Jona-Lasinio (NJL) model. The chiral susceptibility and equation of state (EOS) are computed in this work for both two-flavor and three-flavor quark matter for contrast. The Pauli–Villars scheme, which
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Weak deflection angle by Casimir wormhole using Gauss-Bonnet theorem and its shadow Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-04 Wajiha Javed; Ali Hamza; Ali Övgün
In this paper, we calculate the weak deflection angle by Casimir wormhole and its shadow. To do so, we derive the Gaussian optical curvature and use the Gauss–Bonnet theorem (GBT). Then we find the deflection angle by Casimir wormhole in weak field limits. Moreover, we obtain the weak deflection angle in the presence of plasma medium and see the effect of the plasma medium on the weak deflection angle
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Deflection of light around a rotating BTZ black hole Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-03 Shubham Kala; Hemwati Nandan; Prateek Sharma
We present a detailed study of gravitational lensing around a rotating Bañados–Teitelboim–Zanelli (BTZ) black hole in (2 + 1)-dimensional gravity. The study of orbits for massless test particle around this BH spacetime is performed to describe the nature of cosmological constant in lower dimensions. We study the effect of cosmological constant on the photon orbit in view of other critical parameters
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Implications of new phase transitions approach onto specific black holes Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-11-12 Abdul Jawad; Shahid Chaudhary
Among many open questions in theoretical physics, consistent quantum gravity theory is still a major issue to be solved. Recent major works in phase transitions of black holes (BH) can be helpful for quantum interpretation of classical gravity. We study the new effective method to discuss the thermodynamic phase transitions onto well renowned regular BHs. Ordinary approaches of phase transitions depend
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Proposed measurement of simultaneous particle and wave properties of electric current in a superconductor Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-23 Hrvoje Nikolić; Josip Atelj
In a microscopic quantum system one cannot perform a simultaneous measurement of particle and wave properties. This, however, may not be true for macroscopic quantum systems. As a demonstration, we propose to measure the local macroscopic current passed through two slits in a superconductor. According to the theory based on the linearized Ginzburg–Landau equation for the macroscopic pseudo wave function
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Study of the branching ratio and CP asymmetries in Bs0¯ → ωϕ decay within QCD factorization Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-16 E. H. Raslan; H. R. Khan
We study analytically the Branching Ratio (BR) and Charge-Parity (CP) asymmetries of the Bs0¯→ωϕ decay mode within QCDF approach. We find the BR(Bs0¯→ωϕ)=(0.51±0.12)×10−6. We also find the values of CP asymmetries are 𝒜CPdir(Bs0¯→ωϕ)=0.080±0.008, 𝒜CPmix(Bs0¯→ωϕ)=0.184±0.035 and 𝒜CPΔΓ(Bs0¯→ωϕ)=0.980±0.006. The reported results are consistent with the recent theoretical predictions and can be used
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Cobimaximal neutrino mixing in the U(1)B−L extension with A4 symmetry Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-10-16 V. V. Vien
We propose a renormalizable U(1)B−L extension of the Standard model with A4 symmetry that leads to the successful cobimaximal lepton mixing ansatz, thus providing a predictive explanation for leptonic mixing observables. The smallness of the active neutrino masses and neutrino masses ordering are produced by the type-I seesaw mechanism at the tree-level. The obtained physical parameters are well consistent
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Implementation of the ATLAS-EXOT-2018-030 analysis in the MadAnalysis 5 framework (W′ boson into a lepton and a neutrino; 139 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-16 Kyungmin Park; Ui Min; Soo Jin Lee; Won Jun
We present the MadAnalysis 5 implementation of the heavily charged gauge boson search to recast the analysis of its decay into one charged lepton and missing transverse momentum. Signal events describing pp→W′→lνl (l=e or μ) at s=13 TeV in the sequential standard model are generated by the [email protected] at leading order. The corresponding signal cross-sections for both electron and muon channels
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Implementation of the CMS-EXO-17-015 analysis in the MadAnalysis 5 framework (leptoquark and dark matter with one muon, one jet and missing transverse energy; 77.4 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-16 Benjamin Fuks; Adil Jueid
We present an implementation of the CMS-EXO-17-015 analysis in the MadAnalysis 5 framework. The analysis targets a search for dark matter in a channel in which it originates from the production and decay of a pair of scalar leptoquarks. This search considers a luminosity ℒ=77.4fb−1 of CMS data collected in 2016 and 2017, in proton-proton collisions at a center-of-mass energy of 13 TeV. The final state
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Implementation of the CMS-HIG-18-011 analysis in the MadAnalysis 5 framework (exotic Higgs decays via two pseudoscalars with two muons and two b-jets; 35.9 fb−1) Mod. Phys. Lett. A (IF 1.391) Pub Date : 2020-12-16 Joon-Bin Lee; Jehyun Lee
We present the implementation in the MadAnalysis 5 framework of the CMS-HIG-18-011 search for exotic decays of the Standard Model Higgs boson, in which the Higgs boson is assumed to decay into a pair of light pseudoscalar a1, that then further decay into a di-muon and di-b-jet final state. This analysis considers proton-proton collisions at a center-of-mass energy of 13 TeV and data collected by the
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