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Searching for New Physics with class='math'>bbˉ?+?? contact interactions

机译:使用 class =“math”> b b ˉ + < / span>联系人交互

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We study the impact of contact interactions involving two leptons (electrons or muons) and two b-quarks (bbˉ?+??) on the high-mass di-lepton region at the LHC. We consider different selections of b-tagged jet multiplicities in the di-lepton final states: inclusive (no selection), 0, 1 and 2 b-tagged jets, and show that the single b-jet selection significantly improves the sensitivity to New Physics (NP) in the form of the bbˉ?+?? contact term. We obtain a better sensitivity compared to the currently existing searches of NP in the di-lepton inclusive channel. In particular, the expected limits go beyond competitive bounds set by LEP (for electrons) on the scale of NP, Λ, by a factor of 1.2?3.1, depending on the chirality structure of the operator. In addition, the expected limits on Λ, set by using a non-resonant LHC di-lepton inclusive search, are expected to be improved by a factor of 1.3?1.4 for both electrons and muons.
机译:我们研究了在LHC的高质量DI-LEPTON区域上涉及两种leptons(电子或muONs)和两个b-quarks(bbˉα+)的接触相互作用的影响。我们认为DI-LEPTON最终状态的B标记喷射多样性不同:包含(无选择),0,1和2 B标记的喷射,并表明单个B喷射选择显着提高了对新物理学的敏感性(NP)以BBˉ?+ ??联系术语。与DI-Lepton在Di-Lepton包装渠道中的当前存在的NP搜索相比,我们获得更好的敏感性。特别是,预期限制超出了LEP(对于电子)在NP,λ的等级的竞争范围之外,根据操作者的手性结构,在NP,λ,λ,3.1的规模上,根据操作员的手性结构。另外,通过使用非谐振LHC DI-LEPTON的预期限制,通过使用非谐振LHC DI-LEPTON来包容搜索,预期改善了电子和μON的1.3倍。

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