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arXiv 1209.4803hep-phhep-ex
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LHC上反跷跷板模型中的Higgs特征

Higgs Signatures in Inverse Seesaw Model at the LHC

Priyotosh Bandyopadhyay, Eung Jin Chun, Hiroshi Okada, Jong-Chul Park

摘要:

在反跷跷板机制中,自发破缺的B-L对称性诱导右手中微子产生微小的B-L违反马约拉纳质量,非标准的希格斯签名可能是由于希格斯双重态和单重态混合和/或希格斯玻色子衰变为左手和右手中微子而产生的。这导致了一个显着的特点,强子安静的双轻子最终状态,可以表现出,特别是轻子味违反签名来自味依赖中微子汤川耦合。在这个过程中,来自右手衰变的一个轻子可能足够软,可以被CMS和ATLAS对双轻子加丢失能量签名的触发能级切割所遗漏。这样的签名的前景进行了调查,为8 TeV和14 TeV的质心能量的LHC,允许中微子汤川耦合的最大值和右手中微子质量为100 GeV。PYTHIA能级模拟结果表明,对于8 TeV的能量,观测到轻子和轻子味的包容性破坏特征分别需要10- 20/fb和1.6/fb的积分亮度.对于14 TeV,可达范围更大,可以探索更大的反跷跷板模型参数空间。

英文摘要:

In the inverse seesaw mechanism where the spontaneously broken B-L symmetry induces tiny B-L violating Majorana masses for right-handed neutrinos, non-standard Higgs signatures can arise due to a possible Higgs doublet and singlet mixing and/or Higgs boson decays to a left- and right-handed neutrino. This leads to a remarkable feature of hadronically quiet di-lepton final states which can exhibit, in particular, lepton flavour violating signatures coming from flavour-dependent neutrino Yukawa couplings. In this process, one lepton coming from the right-handed decay could be soft enough can be missed by the trigger level cuts of CMS and ATLAS for the di-lepton plus missing energy signature. The prospects of such a signature are investigated for 8 TeV and 14 TeV center of mass energy of the LHC, taking the maximum value of the allowed neutrino Yukawa coupling and the right-handed neutrino mass of 100 GeV. A PYTHIA level simulation shows that the integrated luminosity of 10--20/fb and 1.6/fb for 8 TeV is required to observe the inclusive leptonic and lepton flavour violating signatures, respectively. For 14 TeV, the reach is more and a larger parameter space of the inverse seesaw model can be probed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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