期刊
PHYSICS LETTERS B
卷 707, 期 1, 页码 88-91出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2011.12.002
关键词
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资金
- MICINN of Spain [FPA2006-05294, FPA2010-16802, FPA2010-17915]
- Consolider-Ingenio Multidark [CSD2009-00064]
- Ramon y Cajal Program
- Junta de Andalucia [FQM 101, FQM 3048, FQM 6552]
We find that a heavy gluon G of mass 800-900 GeV with small, mostly axial-vector couplings to the light quarks and relatively large vector and axial-vector couplings to the top quark can explain the forward-backward asymmetry observed at the Tevatron with no conflict with other top-quark or dijet data. The key ingredient is a complete treatment of energy-dependent width effects and a new decay mode G -> qQ, where q is a standard quark and Q a vector-like quark of mass 400-600 GeV. We show that this new decay channel makes the heavy gluon invisible in the t (t) over bar invariant mass distribution and discuss its implications at the Tevatron and the LHC. (C) 2011 Elsevier B.V. All rights reserved.
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