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Article
Report number arXiv:1204.1265 ; CERN-PH-EP-2012-073 ; CERN-PH-EP-2012-073
Title Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector
Related titleSearch for pair production of a new quark that decays to a Z boson and a bottom quark with the ATLAS detector
Author(s) ATLAS Collaboration  Visualizza tutti i 3040 autori
Publication 2012
Imprint 06 Apr 2012
Number of pages 18
Note Comments: 5 pages plus cover letter and author list (18 pages total), 5 figures, 1 table, revised author list, matches published PRL version
5 pages plus cover letter and author list (18 pages total), 5 figures, 1 table, revised author list, matches published PRL version
In: Phys. Rev. Lett. 109 (2012) 071801
DOI 10.1103/PhysRevLett.109.071801
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords exotics ; heavy quark production ; experimental results
Abstract A search is reported for the pair production of a new quark, b', with at least one b' decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb1 of integrated luminosity, were collected from pp collisions at s = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. Using events with a b-tagged jet and a Z boson reconstructed from opposite-charge electrons, the mass distribution of large transverse momentum b' candidates is tested for an enhancement. No evidence for a b' signal is detected in the observed mass distribution, resulting in the exclusion at 95% confidence level of b' quarks with masses mb < 400 GeV that decay entirely via b' to Z+b. In the case of a vector-like singlet b' mixing solely with the third Standard Model generation, masses mb < 358 GeV are excluded.
Copyright/License preprint: © 2012-2024 CERN (License: CC-BY-3.0)
publication: © 2012-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: tony.doyle@glasgow.ac.uk


 Record creato 2012-04-06, modificato l'ultima volta il 2024-03-14


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