Bounds on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario
Bounds on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario
复制标题
同符号双玻色子衰变场景中双电荷希格斯玻色子质量的界限
DOI：
10.1103/physrevd.90.115018
复制
发表时间：
2014
影响因子：
5
通讯作者：
Hiroshi Yokoya
中科院分区：
文献类型：
--
作者：
Shinya Kanemura;Mariko Kikuchi;Kei Yagyu;Hiroshi Yokoya
直接寻找双电荷希格斯玻色子是希格斯三重态模型中最重要的探测器之一，该模型是由微小中微子质量的产生机制推动的。存在两种主要的衰变模式，即同号双轻子衰变和同号双玻色子衰变。对于前一种衰变模式占主导地位的情况，ATLAS和CMS的合作将其质量下限定为约400GeV。另一方面，对于后一种衰减模式占主导地位的情况，过去没有执行专用搜索。通过考虑LEP的双玻色子衰变场景中的特征信号和LHC实验，我们发现，在7TeV的碰撞能量下，使用ATLAS合作进行的同号双轻子搜索可以获得60-68GeV的质量下限。我们还证明了，假设积分光度为2，碰撞能量为7TeV，极限可以扩展到约85-90GeV。我们详细地解释了相对小质量情况下的衰变性质，以及大型强子对撞机上QCD倒数第一级的产生截面。
A direct search for doubly charged Higgs bosonsis one of the most important probes in the Higgs triplet model, which is motivated by generation mechanisms of tiny neutrino masses. There are two major decay modes of, i.e., the same-sign dilepton decayand the same-sign diboson decay. For the case where the former decay mode is dominant, the lower limit on the mass ofhas been set at about 400 GeV by the ATLAS and CMS Collaborations. On the other hand, for the case where the latter decay mode is dominant, no dedicated search has been performed in the past. By taking into account characteristic signals ofin the diboson decay scenario at LEP and the LHC experiments, we find that the lower mass bound of 60–68 GeV can be obtained by using the same-sign dilepton search performed by the ATLAS Collaboration withdata at the collision energy of 7 TeV. We also show that the limit can be extended up to about 85–90 GeV, assuming the integrated luminosity ofand 7 TeV for the collision energy. We give detailed explanations on the decay properties offor relatively small mass cases and also on production cross sections ofat the next-to-leading order of QCD at the LHC.