Supported by Natural Science Foundation of China (10435070, 10773011, 10721140381, 10099630);China Ministry of Science and Technology (2007CB16101, 2010CB833000)
In the LHC experiment, the H →γγ channel provides a clean final state with an effective mass peak that is reconstructed with great precision, despite the small branching ratio. As a consequence, the H →γγ channe...
Supported by National Natural Science Foundation of China (10435070,10721140381,10099630);China Ministry of Science and Technology (2007CB16101);Chinese Academy of Sciences (KJCX2-N17,1730911111)
In this paper, we studied the development of hadronic shower in an electromagnetic calorimeter of Alpha Magnetic Spectrometer Ⅱ. Two parametrized empirical formulae were proposed to describe the hadronic shower shape...
Supported by Natural Science Foundation of China (10435070,10773011,10721140381,10099630);China Ministry of Science and Technology (2007CB16101,2010CB833000)
Monochromatic y-rays are thought to be the smoking gun signal for identifying dark matter annihilation. However, the flux of monochromatic y-rays is usually suppressed by virtual quantum effects since dark matter shou...
Supported by National Natural Science Foundation of China (10435070, 10721140381, 10099630);China Ministry of Science and Technology (2007CB16101);Chinese Academy of Sciences (KJCX2-N17, 1730911111)
In the LHC experiment, the neutral pions produced during jet fragmentation are the background sources for all physics channels with high-energy photons in their final state. In this paper, the application of the three...
Supported by NSFC (10435070,10721140381,10099630);China Ministry of Science and Technology (2007CB16101);CAS(KJCX2-N17,1730911111);China Postdoctoral Science Foundation (20090450577)
The Minimal Higgsless Model predicts the existence of new vector gauge boson W1^±, By the process PP →W1^±qq →W^±Z^0qq, Z^0→ 1^+1^-, W^±→ qq (1=e,μ; q is hadronized to be jets), we study the sensitivity of...
Supported by NSFC (10435070, 10099630);Ministry of Science and Technology of China (2007CB816101)
In this paper the J/ψ→μ^+μ^- reconstruction performance in the CMS experiment at the LHC is studied in detail by using B8→J/ψφ→μμKK events. The reconstruction efficiencies of J/ψ mesons and their decay muo...