Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/101808
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Type: Journal article
Title: Search for pair production of a new b′ quark that decays into a Z boson and a bottom quark with the ATLAS Detector
Author: Aad, G.
ATLAS Collaboration
Citation: Physical Review Letters, 2012; 109(7):071801-1-071801-19
Publisher: American Physical Society
Issue Date: 2012
ISSN: 1079-7114
1079-7114
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M. J. White ... et al. (ATLAS Collaboration)
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  fb⁻¹ 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 a 95% confidence level of b ′ quarks with masses m b ′<400  GeV that decay entirely via b′→Z+b. In the case of a vectorlike singlet b′ mixing solely with the third standard model generation, masses m ′<358  GeV are excluded.
Keywords: ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration
Rights: © 2012 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
RMID: 0020132648
DOI: 10.1103/PhysRevLett.109.071801
Appears in Collections:Physics publications

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