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Search for Pair Production of a New b ' Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector
ATLAS collaboration
2012
发表期刊PHYSICAL REVIEW LETTERS
卷号109期号:7
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要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 root 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(b)' < 358 GeV are excluded.
关键词ROOT-S=7 TEV COLLISIONS
学科领域Physics
DOI10.1103/PhysRevLett.109.071801
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000307709400006
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213318
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Search for Pair Production of a New b ' Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector[J]. PHYSICAL REVIEW LETTERS,2012,109(7).
APA ATLAS collaboration.(2012).Search for Pair Production of a New b ' Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector.PHYSICAL REVIEW LETTERS,109(7).
MLA ATLAS collaboration."Search for Pair Production of a New b ' Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector".PHYSICAL REVIEW LETTERS 109.7(2012).
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