Searching supersymmetric leptonic partner at the CERN LHC

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• 作者：Jiwei Ke^a ; Ming-Xing Luo^a ; Lian-You Shan^b ; Kai Wang^a ; ^{wangkai1@zju.edu.cn} ; Liucheng Wang^a
• 刊名：Physics Letters B
• 出版年：2013
• 出版时间：29 January, 2013
• 年：2013
• 卷：718
• 期：4-5
• 页码：1334-1341
• 全文大小：358 K

文摘

Motivated by the observed excess of the di-photon signal in Higgs searches, , we argue that models with enhanced alone are the most favorable scenarios when the latest LHC/Tevatron results are all taken into account. We study the phenomenology of a supersymmetric scenario of light stau that predicts a 125 GeV SM-like Higgs boson with enhanced di-photon decay through light stau loops. Since it is extremely challenging to search the Drell-Yan stau pair at the LHC due to the small production rate, we focus on the parameter space with enhanced production of inclusive stau pairs, in particular, via fusion or gaugino pairs. We study its phenomenology in both pure leptonic tau channels and hadronic tau tagged channels. We find the same-sign dilepton from may significantly improve the discovery potential with even 7-8 TeV LHC of data. In the case of hadronic tau pair, we use the final state to search and find that even with the most optimistic region of , it requires at least 50 fb^?1 data of 14 TeV LHC to reach a significance of 3.5¦Ò. Therefore, we conclude it is difficult to claim discovery only through hadronic tau based on the data by the 2012 shut-down. 5¦Ò reach for our most optimistic region then requires 100 fb^?1 data with 14 TeV running.