Discovery potential of Higgs boson pair production through 4■+■ final states at a 100 TeV collider  

作　　者：赵笑然 李强 李钊 晏启树 

机构地区：[1]Centre for Cosmology, Particle Physics and Phenomenology (CP3), Universite Catholique de Louvain Chemin du Cyclotron, 2, B-1348 Louvain-la-Neuve, Belgium [2]Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University Beijing 100871, China [3]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China [4]School of Physics Sciences, University of Chinese Academy of Sciences, Beijing 100049, China [5]Center for Future High Energy Physics, CAS, Beijing 100049, China

出　　处：《Chinese Physics C》2017年第2期74-94,共21页中国物理C（英文版）

基　　金：Supported by Natural Science Foundation of China(11175251,11305179,11675185,11475180,11575005);The work of Q.Li and Q.S.Yan is partially supported by CAS Center for Excellence in Particle Physics(CCEPP);X.Zhao is partially supported by the European Union as part of the FP7 Marie Curie Initial Training Network MCnet ITN(PITN-GA-2012-315877)

摘　　要：We explore the discovery potential of Higgs pair production at a 100 Te V collider via full leptonic mode.The same mode can be explored at the LHC when Higgs pair production is enhanced by new physics. We examine two types of fully leptonic final states and propose a partial reconstruction method, which can reconstruct some useful kinematic observables. It is found that the m T2 variable determined by this reconstruction method and the reconstructed visible Higgs mass are crucial to discriminate the signal and background events. It is also noticed that a new variable, denoted as △m, which is defined as the mass difference of two possible combinations, is very useful as a discriminant. To examine the detector effects, we consider seven detector setups for a 100 Te V collider and investigate the changes in the sensitivity, and we find that lepton isolation and the minimal lepton P t cut are crucial in order to reduce the integrated luminosity.We explore the discovery potential of Higgs pair production at a 100 Te V collider via full leptonic mode.The same mode can be explored at the LHC when Higgs pair production is enhanced by new physics. We examine two types of fully leptonic final states and propose a partial reconstruction method, which can reconstruct some useful kinematic observables. It is found that the m T2 variable determined by this reconstruction method and the reconstructed visible Higgs mass are crucial to discriminate the signal and background events. It is also noticed that a new variable, denoted as △m, which is defined as the mass difference of two possible combinations, is very useful as a discriminant. To examine the detector effects, we consider seven detector setups for a 100 Te V collider and investigate the changes in the sensitivity, and we find that lepton isolation and the minimal lepton P t cut are crucial in order to reduce the integrated luminosity.

关 键 词：Higgs pair hadron collider leptonic mode 

分 类 号：O572.214[理学—粒子物理与原子核物理]