论文标题
在质子proton Collisions $ \ sqrt {s} $ = 13 TEV的情况下，搜索具有质子proton碰撞的DiLepton签名事件中的重型复合Majorata Neutrino
Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
结果是搜索沉重的主要中微子n $ _ \ ell $ n $ n $ _ \ ell $，将两个相同味的瘦素$ \ ell $（电子或muons）和Quark-pair Jet衰减。考虑了一个模型，其中n $ _ \ ell $在组合方案中是一个激动的中微子。使用$ \ sqrt {s} $ = 13 TEV记录的proton-proton碰撞样本进行分析，CMS实验在Cern LHC上记录，对应于138 fb $^{ - 1} $的集成光度。发现数据与标准模型预测一致。对于与Lepton相关的N $ _ \ Ell $的过程，随后将N $ _ \ Ell $衰减到同一味的Lepton和Quark对，在横截面和分支分数的95％置信度和分支分支的上限为95％的置信度，并作为N $ _ \ Ell $ $ MOSE $ MM M _ _ _ _ \ _ _ \ _ \ _ _ {综合量表$λ$。对于此模型，数据排除了$ m _ {n $_μ$的n $ _ \ text {e} $（n $_μ$）的存在，对于$ m _ {\ text {n} _ \ ell} $以下6.0（6.1）tev以下tev，在限制下，其中$ m _ {\ text {\ text {n} _ \ ell} $均等。对于$ m _ {\ text {n} _ \ ell} $ $ \ $ 1 tev，$λ$小于20（23）tev的值被排除在外。这些结果代表了敏感性的显着提高，涵盖了比以前在TEV处PP碰撞的搜索更大的参数空间。
Results are presented of a search for a heavy Majorana neutrino N$_\ell$ decaying into two same-flavor leptons $\ell$ (electrons or muons) and a quark-pair jet. A model is considered in which the N$_\ell$ is an excited neutrino in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at $\sqrt{s}$ = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 138 fb$^{-1}$. The data are found to be in agreement with the standard model prediction. For the process in which the N$_\ell$ is produced in association with a lepton, followed by the decay of the N$_\ell$ to a same-flavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section and branching fraction is obtained as a function of the N$_\ell$ mass $m_{\text{N}_\ell}$ and the compositeness scale $Λ$. For this model the data exclude the existence of N$_\text{e}$ (N$_μ$) for $m_{\text{N}_\ell}$ below 6.0 (6.1) TeV, at the limit where $m_{\text{N}_\ell}$ is equal to $Λ$. For $m_{\text{N}_\ell}$ $\approx$ 1 TeV, values of $Λ$ less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV.
