Abstract
A search is presented for a heavy vector-like quark, decaying into a b quark and a W boson, which is produced singly in association with a light flavor quark and a b quark. The analysis is performed using a data sample of proton–proton collisions at a center-of-mass energy of s=13TeV collected at the LHC in 2015. The data set used in the analysis corresponds to an integrated luminosity of 2.3fb−1. The search is carried out using events containing one electron or muon, at least one b-tagged jet with large transverse momentum, at least one jet in the forward region of the detector, and missing transverse momentum. No excess over the standard model prediction is observed. Upper limits are placed on the production cross section of heavy exotic quarks: a T quark with a charge of 2/3, and a Y quark with a charge of −4/3. For Y quarks with coupling of 0.5 and B(Y→bW)=100%, the observed (expected) lower mass limits are 1.40 (1.0)TeV. This is the most stringent limit to date on the single production of the Y vector-like quark.
Highlights
The standard model (SM) of particle physics has been exceptionally successful in describing phenomena at the subatomic scale
We present a search for the single production of a heavy vector-like quark that decays into a b quark and a W boson using the 2015 LHC data set
In the framework of the model considered, Y quarks with a coupling of 0.5 and B(Y → bW) = 100% are excluded in the mass range from 0.85 to 1.40 that expected for VLQ mass (TeV)
Summary
The standard model (SM) of particle physics has been exceptionally successful in describing phenomena at the subatomic scale. We present a search for the single production of a heavy vector-like quark that decays into a b quark and a W boson using the 2015 LHC data set. This signature can arise from either a Y or a T quark with a charge of −4/3 or 2/3, respectively, produced in association with a light flavor quark and a b quark. The analysis presented here is the first such search using 13 TeV proton–proton data, and sets the most stringent limits to date on the production cross section for a single Y or T quark. The search is carried out based on events containing one electron or muon, at least one b-tagged jet with large transverse momentum (pT), at least one jet in the forward region of the detector, and missing transverse momentum
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
