Elsevier

Nuclear Physics B

Volume 955, June 2020, 115058
Nuclear Physics B

Search for vector-like T quark through th channel at collider

https://doi.org/10.1016/j.nuclphysb.2020.115058Get rights and content
Under a Creative Commons license
open access

Abstract

In an extension of the Standard Model with vector-like top partner, we investigate the vector-like top quark partner T via the channel eγbνeT¯(t¯h) at future linear collider. Due to the larger production rates than unpolarized beams, we calculate the production cross sections in polarized beams at s=2 and 3 TeV. We make a fast detector simulation for signal and background events and take a set of appropriate kinematic variables to enhance the signal significance. When the initial state radiation and beamstrahlung effects are in charge, we find that the correlated region g[0.33,0.5] ([0.14,0.5]) and mT[1300GeV,1480GeV] ([1300GeV,1900GeV]) can be excluded at 2σ level with the integrated luminosity 600fb1 (3000fb1) at s=2 TeV. When the center-mass energy s is upgraded to 3 TeV, the excluded region is expanded to g[0.3,0.5] ([0.14,0.5]) and mT[1300GeV,1940GeV] ([1300GeV,2000GeV]) with the integrated luminosity 600fb1 (3000fb1). Besides, we find the 5σ discovery correlated region is g[0.30,0.5] ([0.27,0.5]) and mT[1300GeV,1500GeV] ([1300GeV,2000GeV]) with the integrated luminosity 3000fb1 at s=2 TeV (3 TeV).

Cited by (0)