Pair production of heavy Q=2/3 singlets at LHC

被引：59

作者：

Aguilar-Saavedra, JA ^{[1
]}

机构：

[1] Univ Tecn Lisboa, Dept Fis, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] Univ Tecn Lisboa, CFTP, Inst Super Tecn, P-1049001 Lisbon, Portugal

来源：

PHYSICS LETTERS B | 2005年 / 625卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2005.08.062

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We examine the LHC discovery potential for new Q = 2/3 quark singlets T in the process gg, qq -> T (T) over bar -> W(+)bW(-)(b) over bar, with one W boson decaying hadronically and the other one leptonically. A particle-level simulation of this signal and its main backgrounds is performed, showing that heavy quarks with masses of 500 GeV or lighter can be discovered at the 5 sigma level after a few months of running, when an integrated luminosity of 3 fb(-1) is collected. With a luminosity of 100 fb(-1), this process can signal the presence of heavy quarks with masses up to approximately I TeV. Finally, we discuss the complementarity among T (T) over bar, Tj production and indirect constraints from precise electroweak data in order to discover a new quark or set bounds on its mass. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：234 / 244

页数：11

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