Electromagnetic and weak transitions tell us a great deal about the structure of atomic nuclei. Yet modeling transitions can be difficult: it is often easier to compute the ground state, if only as an approximation, than excited states. One alternative is through transition sum rules, in particular the non-energy-weighted and energy-weighted sum rules, which can be computed as expectation values of

Properties of nuclear matter are investigated in the framework of relativistic Brueckner–Hartree–Fock model with the latest high-precision charge-dependent Bonn (pvCD-Bonn) potentials, where the coupling between pion and nucleon is adopted as a pseudovector form. These realistic pvCD-Bonn potentials are renormalized to effective nucleon–nucleon (NN) interactions, G matrices. They are obtained by solving

Charged particles at the crust of compact stars may be ejected and accelerated by the induced electric field generated due to the rotation of the magnetized star. For neutron or hybrid stars, the negatively charged particles are usually electrons, and the positively charged particles are mainly protons and iron. Whereas, the existence of strange stars also includes the possibility of ejection of strangelets

The renormalization group relations for the higher-order hadronic vacuum polarization function perturbative expansion coefficients are studied. The folded recurrent and unfolded explicit forms of such relations are obtained. The explicit expression for the coefficients, which incorporate the contributions of the π 2 -terms in the perturbative expansion of the R -ratio of electron–positron annihilation

The equation of state with light clusters for nuclear and stellar matter is determined using chemical equilibrium constants evaluated from the analysis of the recently published (Xe + Sn) heavy ion data, corresponding to three reactions with different isotopic contents of the emission source. The measured multiplicities are used to extract the thermodynamic properties, and an in-medium correction to

Two-neutrino double electron capture is a process allowed in the standard model of particle physics. This rare decay has been observed in 78 Kr, 130 Ba and more recently in 124 Xe. In this publication we report on the search for this process in 124 Xe and 126 Xe using the full exposure of the large underground xenon (LUX) experiment, in a total of 27769.5 kg-days. No evidence of a signal was observed

The signal strength of the gg → H → γγ reaction in pp collisions at the Large Hadron Collider is studied within the context of the standard model with universal extra dimensions (UED). The impact of an arbitrary number n of UED on both the gg → H and H → γγ subprocesses is studied. The one-loop contribution of Kaluza–Klein excitations on these subprocesses are proportional to discrete and continuous

In spite of numerous scientific and practical applications, there is still no comprehensive theoretical description of the nuclear fission process based solely on protons, neutrons and their interactions. The most advanced simulations of fission are currently carried out within nuclear density functional theory ( DFT ). In spite of being fully quantum-mechanical and rooted in the theory of nuclear

We show how to produce antideuteron, antihelium, and other antinuclei in large fractions from the decays of a new particle ϕ that carries baryon number. Close to threshold, the production of nuclear bound states is preferred over the decay into individual nucleons, effectively decoupling antinuclei and antiproton fluxes and allowing the former to dominate, in clear contrast to antimatter production

Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these long-lived particles (LLPs) can decay far from the interaction vertex of the primary proton–proton collision. Such LLP signatures are distinct from those of promptly decaying particles that

We study the nuclear matter properties like symmetry energy, slope parameter, curvature, skewness and incompressibility for hybrid EoS. The hybrid EoS is constructed by combining the hadron phase with the quark phase. For the hadron phase, we use the recently proposed effective-field-theory motivated relativistic mean-field model (E-RMF) with different parameter sets. For the quark phase, we employ

Charge trapping degrades the energy resolution of germanium (Ge) detectors, which require increased experimental sensitivity in searching for dark matter and neutrinoless double-beta decay. We investigate the charge trapping processes utilizing nine planar detectors fabricated from USD-grown crystals with well-known net impurity levels. The charge collection efficiency as a function of charge trapping

We describe a new method to solve coupled equations, that arises from the coupled-channel formalism applied to nuclear reactions involving the elastic and inelastic scattering processes. The new technique is faster and presents better numerical convergence than other usual methods. To illustrate the method, in the present paper we have analyzed data for the 4 He + 208 Pb system at E lab. = 120 and

The transverse momentum distribution of identified hadrons from recent years are analyzed within the thermodynamically consistent formulation of non-extensive statistics. A wide range of center-of-mass energies and average event multiplicities are studied for various hadron species. We demonstrate that the average event multiplicity is a key variable in the study of high-energy collisions and a smooth

The exotic nuclei are a fertile source of new features of nuclear structure. The evolution of new shell gaps accompanied by quenching of classical magic numbers is one of the marked features in these nuclei. These studies aimed to search and explore such behavior and find major significance on both the experimental and theoretical fronts. Here, we present an inclusive study and significant evidence

We explore the physics expected sensitivity at the Large Hadron electron Collider (LHeC) and the future circular collider-hadron electron (FCC-he) to search for the anomalous quartic WWγγ couplings in single W -boson production in association with a photon. We study the process ep → e − γ * p → eWγq ′ X via the subprocess γ * q → Wγq ′. The center-of-mass energies and luminosities of the LHeC are assumed

We investigate the impact of statistical uncertainties in the two-nucleon potentials on the neutron–deuteron elastic scattering and the deuteron breakup reaction observables at incoming nucleon kinetic energy up to 200 MeV. To that end we use the semi-phenomenological one-pion-exchange- Gaussian two-nucleon potential developed by the Granada group and the recent semi-local momentum-space regularized

We developed new parameterizations of local regularized finite-range pseudopotentials up to next-to-next-to-next-to-leading order (N 3 LO), used as generators of nuclear density functionals. When supplemented with zero-range spin–orbit and density-dependent terms, they provide a correct single-reference description of binding energies and radii of spherical and deformed nuclei. We compared the obtained

In a strong magnetic field, the hot dense quark matter is investigated in the Polyakov Nambu–Jona–Lasinio model. The value of a traced Polyakov loop is found as a nonmonotonous function of the chemical potential at lower magnetic fields and as a monotonous increasing function at high magnetic fields. The decreasing pseudocritical temperatures for the chiral restoration and the deconfinement crossover

A variant of QCD with the coupling suppressed in the infrared (IR) regime, as suggested by large-volume lattice calculations of the Landau gauge gluon and ghost dressing functions, is considered. The coupling is further restricted by the condition of approximate coincidence with perturbative QCD in the high momentum regime, and by the τ -lepton semihadronic decay rate in the intermediate momentum regime

High spin states in 127 I were populated via 124 Sn( 7 Li, 4n γ ) fusion-evaporation reaction at E beam = 33 MeV. Level scheme of 127 I has been updated by placing new γ -rays and also by confirming the spin/parity of several energy levels. Two new levels at E x = 2628 and 3199 keV have been identified which are found to decay into the negative parity πh 11/2 band. These two states and two earlier

In recent years, nuclear physics has benefited greatly from the development of powerful ab initio many-body methods and their combination with interactions from chiral effective field theory. With increasing computational power and continuous development of these methods, we are entering an era of precision nuclear physics. Indeed, uncertainties from nuclear Hamiltonians now dominate over uncertainties

In the present work we examine the possibility of detecting light dark matter particles in the few MeV region via their interactions with electrons. We analyze theoretically some key issues involved in such a detection and perform calculations for the expected rates, for electron recoils as well as spin induced atomic excitations, in the context of reasonable theoretical models.

Investigation of the nucleon’s excited states has always become an important research topic because of the rich information they provide. Since their first observation, dating back about 70 years, the investigation of their various parameters contributed both to the development of the quark model and a better understanding of the QCD as the theory of strong interaction. Their investigation still has

High-spin states in the N = 128 nucleus 218 Th have been investigated following fusion–evaporation reactions, using the recoil-decay tagging technique. Due to the short-lived nature of the ground state of 218 Th prompt γ rays have been correlated with the α decay of the daughter nucleus 214 Ra. The level scheme representing the decay of excited states has been extended to (16 + ) with the observation

The properties of a neutron star are studied in the presence of dark matter. We have considered a relatively light weakly interacting massive particle (WIMP) as a dark matter candidate with properties suggested by the results of the DAMA/LIBRA collaboration, realized for instance within the framework of the Next-to-Minimal Supersymmetric Standard Model. The dark matter particle interacts with the baryonic

We study various formulations of Leggett–Garg inequality (LGI), specifically, the Wigner and Clauser–Horne forms of LGI, in the context of subatomic systems, in particular, three flavor neutrino as well as meson systems. The optimal forms of various LGIs for either neutrinos or mesons are seen to depend on measurement settings. For the neutrinos, some of these inequalities can be written completely

The measurement of an annual modulation in the event rate of direct dark matter detection experiments is a powerful tool for dark matter discovery. Indeed, several experiments have already claimed such a discovery in the past decade. While most of them have later revoked their conclusions, and others have found potentially contradictory results, one still stands today. This paper explains the potential

We study the information content of nuclear masses from the perspective of global models of nuclear binding energies. To this end, we employ a number of statistical methods and diagnostic tools, including Bayesian calibration, Bayesian model averaging, chi-square correlation analysis, principal component analysis and empirical coverage probability. Using a Bayesian framework, we investigate the structure

Recent ν e appearance data from the Mini Booster Neutrino Experiment support the excess of events reported by the Liquid Scintillator Neutrino Detector, which provides an indirect hint of the existence of eV-scale sterile neutrinos. As these sterile neutrinos can mix with the standard active neutrinos, in this paper we explore the effect of such active–sterile mixing on the determination of various

The relationship between the deformed harmonic oscillator and the formation of molecular cluster structures, whereby valence neutrons are exchanged between cluster cores, is examined. It is found that there is a strong connection between the properties of the valence orbitals associated with deformed structures in the deformed harmonic oscillator and the molecular orbitals created by linear combinations

The discovery of gravitational waves has confirmed old theoretical predictions that binary systems formed with compact stars play a crucial role not only for cosmology and nuclear astrophysics [1]. As a byproduct of these and subsequent observations, it is now clear that neutron-star mergers can be a competitive site for the production of half of the elements heavier than iron in the Universe following

It is conventionally argued that dark matter (DM) has a non-baryonic nature, but if we assume that DM was frozen out before primordial nucleosynthesis and could not significantly impact primordial abundances this argument may be evaded. Then a hypothetical SU (3) flavor-singlet, highly symmetric, deeply bound neutral scalar hexaquark S = uuddss , which due to its features has escaped from experimental

We study all extensions of the standard model (SM) with a vector dark matter (VDM) candidate which can explain the peak structure observed recently by the DAMPE experiment in the electron–positron cosmic ray spectrum. In this regard, we consider all leptophilic renormalizable VDM-SM interactions through scalar, spinor, and vector mediators. We show that only two out of six possible models could produce

The XENON1T experiment uses a time projection chamber (TPC) with liquid xenon to search for weakly interacting massive particles (WIMPs), a proposed dark matter particle, via direct detection. As this experiment relies on capturing rare events, the focus is on achieving a high recall of WIMP events. Hence the ability to distinguish between WIMP and the background is extremely important. To accomplish

We present the first application of a new approach, proposed in (2016 J . Phys . G : Nucl . Part . Phys . 43 04LT01) to derive coupling constants of the Skyrme energy density functional (EDF) from ab initio Hamiltonian. By perturbing the ab initio Hamiltonian with several functional generators defining the Skyrme EDF, we create a set of metadata that is then used to constrain the coupling constants

The first order hydrodynamic evolution equations for the shear stress tensor, the bulk viscous pressure and the charge current have been studied for a system of quarks and gluons, with a non-vanishing quark chemical potential and finite quark mass. The first order transport coefficients have been obtained by solving an effective Boltzmann equation for the grand-canonical ensemble of quasiquarks and

We present a simple introduction to the decision tree algorithm using some examples from nuclear physics. We show how to improve the accuracy of the classical liquid drop nuclear mass model by performing feature engineering with a decision tree. Finally, we apply the method to the Duflo–Zuker model showing that, despite their simplicity, decision trees are capable of improving the description of nuclear

Many decays of light baryons consisting of light u , d , s quarks have been measured, and these measurements will help us to understand the decay properties of light baryons. In this work, we study two-body nonleptonic weak decays of light baryon octets ( T 8 ) and baryon decuplets ( T 10 ) by the topological diagram approach (TDA) under the SU(3) flavor symmetry for the first time. We find that (1)

In this paper, a measurement of the atomic mass and mass excess of ##IMG## [http://ej.iop.org/images/0954-3899/47/8/085104/gab98e3ieqn1.gif] {${}_{75}{}^{190}\mathrm{Re}$} are presented. This isotope and ##IMG## [http://ej.iop.org/images/0954-3899/47/8/085104/gab98e3ieqn2.gif] {${}_{77}{}^{192}\mathrm{Ir}$} were produced at the Maier-Leibnitz Laboratory (MLL) in Munich in the 192 Os( d , α ) 190 Re

The quark matter symmetry free energy and the thermodynamical properties of strange quark matter (SQM) in strong magnetic fields and non-zero temperature cases are discussed in this work within Nambu–Jona-Lasinio (NJL) model by considering two kinds of vector interactions. The properties of the proto-quark stars (PQSs) are also studied by introducing a density-dependent magnetic field strength distribution

High-spin states of 109 Ag have been studied using the 7 Li + 110 Pd reaction at a beam energy of 46 MeV. A negative-parity band decaying to the ground-state band by several new linking transitions is established. Meanwhile, seven new E 2 crossover transitions of this band are observed, thereby confirming the spin-parity assignment and ordering of the dipole transitions above the I π = 19/2 − level

The study of exotic nuclei is one of the most interesting topics in nuclear physics. 34 Na has attracted additional attentions for an odd–odd nucleus with special structure. Here, we combine the complex momentum representation (CMR) and Green’s function (GF) to establish the CMR-GF method for the exploration of exotic structure, such as halo, skin, the level inversion and so on, in 34 Na. The available

This work reports, for the first time, the analysis of tensor analyzing powers ( T 20 , T 21 , T 22 ) along with the differential cross-section (CS) and the vector analyzing power iT 11 for the 6 Li + 12 C elastic scattering at 30 and 50 MeV within the framework of an optical model (OM) using microscopic shallow non-monotonic (NM) potentials. The NM potential is generated from the energy density functional

In this work, the CPT-violating (CPTV) interactions on neutrons’ gravitational bound state are studied. With simple analytical solutions, we provide a preliminary investigation into the Lorentz-violation (LV)-induced spin precession due to the ##IMG## [http://ej.iop.org/images/0954-3899/47/8/085002/gab8c30ieqn1.gif] {$\to {\sigma }\cdot \to {\tilde {b}}\left(1+gz\right)$} and ##IMG## [http://ej.iop

We investigate the hindrance of the unfavored α -decay modes to the different daughter states, which have different spin than that of the parent nucleus but of the same parity. The duplicated daughter nucleus states of identical spin-parity ( J π ) are ascendingly ordered according to the sequence of their excitation energy. We found that the hindrance of the unfavored decay modes increases with increasing

We investigate baryogenesis via leptogenesis in an A 4 flavor model within the paradigm of type-I and II seesaw mechanism resulting in a magic neutrino mass matrix with broken μ − τ symmetry in a minimal scenario with two right-handed neutrinos (2RHN). Additional Z 3 cyclic symmetry is employed to constrain the Yukawa structure of the model. The type-II seesaw terms play a crucial role in generating

Properties of b-baryon decay matrix elements (amplitudes) are derived in a nonsymmetric quark model without any use of SU(6), SU(3), or SU(2) (isotopic spin) groups. Equalities between pairs of atrix elements are derived, and Λ–Σ mixing is used to calculate the branching ratio for the transition Λ b → Σ 0 .

The Cu + Au collisions are expected to provide interesting new aspects in the understanding of anisotropic flow in heavy ion collisions due to asymmetric initial geometry on the transverse plane as well as due to the significant difference in number of participants in the two colliding nuclei. We calculate directed flow coefficient v 1 of thermal photons from 200 A GeV Cu + Au collisions at RHIC using

We consider neutrino oscillations in vacuum in the framework of quantum field theory in which neutrino production and detection processes are part of a single Feynman diagram and the corresponding cross section is computed in the standard way, i.e. with final states represented by plane waves. We use assumptions which are realized in actual experiments and concentrate on the detection process. Moreover

In this paper, we explore the signature of a simplified model which includes a new singlet scalar state and a vector like quark at future lepton colliders. In particular, we study the production of the new singlet scalar in association with a photon, which proceeds through loop level diagrams involving a vector like top quark partner, at future e − e + colliders with different center-of-mass energies

Nuclear density functional theory is the prevalent theoretical framework for accurately describing nuclear properties at the scale of the entire chart of nuclides. Given an energy functional and a many-body scheme (e.g., single- or multireference level), the predictive power of the theory depends strongly on how the parameters of the energy functionals have been calibrated with experimental data. Expanded

The dinuclear system (DNS) model has been widely used to explain different heavy-ion reactions such as fusion, quasifission and fission. In previous studies, the DNS is treated as a local N / Z equilibrium system formed after the capture process in the final stage of the reaction. In this work, we generalize the DNS concept to describe the multi-nucleon transfer (MNT) reaction in the dynamical radial

By allowing gauge anomaly cancellation between fermions in different families we find a non-universal solution for a Z ′ family of models with the same content of fermions of the standard model plus three right-handed neutrinos. We also impose constraints from the Yukawa interaction terms in such a way that at the end we obtain a solution with six free parameters. Our solution contains as particular

The direct photon emission model in relativistic nuclear colliders has been improved in recent years for reducing the discrepancy between theoretical estimations and experimental data and for understanding the properties of the QCD matter. In this study, the contribution of pre-equilibrium photons are investigated in addition to those of prompt and thermal photons in the framework of a relativistic

The cross-sections of 153 Eu(n,p) 153 Sm and 153 Eu(n,α) 150 Pm reactions have been measured experimentally. Monoenergetic neutron beams were produced via the 3 H(d,n) 4 He reaction using the K-400 neutron generator at China Academy of Engineering Physics (CAEP). The activity of the reaction products were measured using high-resolution gamma-ray spectroscopy. Using the 27 Al(n,α) 24 Na reaction as

Simple extensions of the standard model (SM) with additional right handed neutrinos (RHNs) can elegantly explain the existence of small neutrino masses and their flavor mixings. Collider searches for sterile neutrinos are being actively pursued currently. Heavy RHNs may dominantly decay into ##IMG## [http://ej.iop.org/images/0954-3899/47/7/075002/jpgab7769ieqn1.gif] {${W}^{\pm }{{\ell }}^{\mp }$} after

The Dirac–Sommerfeld–Maue theory for relativistic electron–nucleus bremsstrahlung at the short-wavelength limit is extended to cover an energy range from 0 to 3 MeV of the outgoing electron, irrespective of collision energy. This is achieved by using an asymptotic representation of the Sommerfeld–Maue function for the impinging electron, valid at energies above 50 MeV, as well as a partial-wave expansion

136 Xe is used as the target medium for many experiments searching for 0 νββ . Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of 137 Xe created by the capture of neutrons on 136 Xe. This isotope decays via beta decay with

The evolution of non-axial shapes and rotational structure in even–even 122–132 Ba isotopes has been investigated microscopically with the application of a triaxial projected shell model (TPSM). Based on calculations, the shape instability and softness towards γ deformation are predicted for these isotopes. In the present work, the application of three-dimensional angular-momentum projection on multi-quasiparticle