Search for heavy neutral leptons in $$W^+\rightarrow \mu ^{+}\mu ^{\pm }\, \text {jet}$$ decays
Search for heavy neutral leptons in $$W^+\rightarrow \mu ^{+}\mu ^{\pm }\, \text {jet}$$ decays
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DOI：
10.1140/epjc/s10052-021-08973-5
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
L. C. R. Aaij;C. Beteta;T. Ackernley;B. Adeva;M. Adinolfi;H. Afsharnia;C. Aidala;S. Aiola
中科院分区：
文献类型：
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作者：
L. C. R. Aaij;C. Beteta;T. Ackernley;B. Adeva;M. Adinolfi;H. Afsharnia;C. Aidala;S. Aiola
在一个W玻色子衰变为两个μ子和一个喷流的过程中寻找重中微子。该数据集对应于LHCb实验收集的质心能量为7和8 TeV 8 TeV的质子-质子碰撞数据的积分光度约为3.0 fb− 13.0 fb− 1。同号和反号μ子在最终状态被认为是。发现数据与预期背景一致。在5 ~ 50 GeV/c250 GeV/c2的重中微子质量范围内，重中微子与标准模型中微子耦合的上限设定为95%~ 95%置信水平。对于轻子数守恒衰变，它们的数量级为10− 310− 3，对于轻子数破坏的重中微子衰变，它们的数量级为10− 410− 4。
A search is performed for heavy neutrinos in the decay of a W boson into two muons and a jet. The data set corresponds to an integrated luminosity of approximately 3.0 fb− 13.0 fb− 1 of proton–proton collision data at centre-of-mass energies of 7 and 8TeV8TeV collected with the LHCb experiment. Both same-sign and opposite-sign muons in the final state are considered. Data are found to be consistent with the expected background. Upper limits on the coupling of a heavy neutrino with the Standard Model neutrino are set at 95% 95% confidence level in the heavy-neutrino mass range from 5 to 50GeV/c250GeV/c2. These are of the order of 10− 310− 3 for lepton-number-conserving decays and of the order of 10− 410− 4 for lepton-number-violating heavy-neutrino decays.