论文标题

搜索$ z^\ prime $ boson衰减到leptophopic $ \ mathrm {u(1)} $模型中的右撇子中微子对

Search for the $Z^\prime$ boson decaying to a right-handed neutrino pair in leptophobic $\mathrm{U(1)}$ models

论文作者

Arun, Mathew Thomas, Chatterjee, Arpan, Mandal, Tanumoy, Mitra, Subhadip, Mukherjee, Ananya, Nivedita, Krishna

论文摘要

标准型号的$ u(1)$扩展包含一个重的中性量规boson $ z^\ prime $。如果瘦恐惧症,玻色子可以从Dilepton共振搜索中逃避严格的边界。我们考虑了两个理论上动机的瘦恐惧症$ u(1)$扩展的例子,其中$ z'$衰减到右撇子中微子(RHNS),并具有大量的分支。 LHC通过生产$ z^\ prime $在LHC及其衰减到RHN对的RHN对,可以为同时搜索​​这些粒子的新可能性,并为RHN对衰减,从而开辟了一种新的可能性。为了使这种衰减发生,RHNS需要比$ z^\ prime $轻。因此,我们在逆Seesaw设置中研究此过程,其中RHN可以在TEV范围内。但是,在这种情况下,它们具有伪dirac的性质,即RHN对只会产生相反的Lepton对,而不是Majorana型中微子,该中微子可以产生相同和相反的Lepton Pairs。因此,我们研究的最终状态具有相同的风味相对的Lepton对加上沉积损失的$ W $ BOSON。我们的分析表明,高光度LHC可以通过rhn对在广泛可用的参数中发现TEV规模的瘦恐惧症$ z^\ prime $。有趣的是,可以通过我们的渠道专门探究未来Dijet共鸣搜索范围之外的大型参数区域。

The $U(1)$ extensions of the Standard Model contain a heavy neutral gauge boson $Z^\prime$. If leptophobic, the boson can evade the stringent bounds from the dilepton resonance searches. We consider two theoretically well-motivated examples of leptophobic $U(1)$ extensions in which the $Z'$ decays to right-handed neutrinos (RHNs) with substantial branchings. The coexistence of a leptophobic $Z^\prime$ and the RHNs opens up a new possibility of searching for these particles simultaneously through the production of a $Z^\prime$ at the LHC and its decay to a RHN pair. For this decay to occur, the RHNs need to be lighter than the $Z^\prime$. Hence, we study this process in an inverse seesaw setup where the RHNs can be in the TeV range. However, in this case, they have a pseudo-Dirac nature, i.e., a RHN pair would produce only opposite-sign lepton pairs, as opposed to the Majorana-type neutrinos, which can produce both same- and opposite-sign lepton pairs. Hence, the final state we study has a same-flavour opposite-sign lepton pair plus hadronically-decaying boosted $W$ bosons. Our analysis shows that the high luminosity LHC can discover a TeV-scale leptophobic $Z^\prime$ decaying via a RHN pair in a wide range of available parameters. Interestingly, large parameter regions beyond the reach of future dijet-resonance searches can be probed exclusively through our channel.

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