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首页> 外文期刊>European physical journal >Search for heavy neutral leptons in (W^+ightarrow mu ^{+}mu ^{pm }, ext {jet}) decays
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Search for heavy neutral leptons in (W^+ightarrow mu ^{+}mu ^{pm }, ext {jet}) decays

机译:搜索(w ^ + lightarrow mu ^ {+} mu ^ { pm} , text {jet} )衰减

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摘要

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 $$3.0, ext {fb} ^{-1} $$ 3.0 fb - 1 of proton–proton collision data at centre-of-mass energies of 7 and $$8, ext {TeV} $$ 8 TeV 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 $$50, ext {GeV/}c^2 $$ 50 GeV/ c 2 . These are of the order of $$10^{-3}$$ 10 - 3 for lepton-number-conserving decays and of the order of $$10^{-4}$$ 10 - 4 for lepton-number-violating heavy-neutrino decays.
机译:在将W玻色子的衰减中进行重型中微子初中的搜索分为两个μONs和射流。 数据集对应于大约$$ 3.0 , text {fb} ^ {-1} $ 3.0 fb - 1的集成光度,在7和$$ 8 的质量能源中心, 文本{TEV} $ 8 TEV与LHCB实验收集。 考虑了最终状态的同一符号和相反的符号。 发现数据与预期的背景一致。 用标准模型中微子与标准模型中微子的偶联的上限设定为沉重的中微子质量范围从5到50份的95%的置信水平,从5到50 , text {gev /} c ^ 2 $ 50 gev / c 2。 Lepton-number-number-number-number-number-number-numberation的重量,这些是Lepton-Number-Number-Number-Number-Number-Numbers-Numbers-Number-inte-4 $ 10 - 4的订单的10 - 3美元的订单 中微子衰减。

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