Search for a heavy narrow resonance decaying to eμ, eτ, or μτ with the ATLAS detector in √s=7 TeV pp collisions at the LHC
Search for a heavy narrow resonance decaying to eμ, eτ, or μτ with the ATLAS detector in √s=7 TeV pp collisions at the LHC
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DOI：
10.1016/j.physletb.2013.04.035
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发表时间：
2013-06-10
影响因子：
4.4
通讯作者：
Zwalinski, L.
中科院分区：
文献类型：
--
作者：
Aad, G.;Abajyan, T.;Zwalinski, L.
这封信介绍了在根S=7TeV的pp碰撞中，寻找衰变成e(+/-)u(+/-)、e(+/-)tau(+/-)或u(+/-)tau(+/-)末态的重粒子的结果。这些数据是在2011年用大型强子对撞机的ATLAS探测器记录的，相当于4.6fb(-1)的积分光度。没有观察到显著超出标准模型预期的情况，并且对于产生违反R宇称的超对称tau中微子，95%置信度水平的排除被放置在横截面乘以分支比上。对于质量为500(2000)GeV的中微子，e-u模、e-tau模和u-tau模的产生截面乘以分支比的观测极限分别为3.2(1.4)fb、42(17)fb和40(18)fb。这些结果极大地扩展了Tevatron实验的限制。(C)2013年欧洲核子研究组织。爱思唯尔出版，版权所有。
This Letter presents the results of a search for a heavy particle decaying into an e(+/-)mu(+/-), e(+/-)tau(+/-), or mu(+/-)tau(+/-) final state in pp collisions at root s = 7 TeV. The data were recorded with the ATLAS detector at the LHC during 2011 and correspond to an integrated luminosity of 4.6 fb(-1). No significant excess above the Standard Model expectation is observed, and exclusions at 95% confidence level are placed on the cross section times branching ratio for the production of an R-parity-violating supersymmetric tau sneutrino. For a sneutrino mass of 500 (2000) GeV, the observed limits on the production cross section times branching ratio are 3.2 (1.4) fb, 42 (17) fb, and 40 (18) fb for the e mu, e tau, and mu tau modes, respectively. These results considerably extend constraints from Tevatron experiments. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.