2013/10/14 by Jia Liu, Liu, Jia, Xiao-Ping Wang +3
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1310.3634
openalex publication_date 2013/10/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In the standard model (SM), pair production rate of Higgs boson at the Large Hadron Collider (LHC) is quite low. One usually think that it is extremely important for the measurement of triple Higgs coupling at the high luminosity LHC. In this paper, we propose to search for the extra Higgs boson (denoted as S) utilizing pair production of the SM-like Higgs boson (H) which was discovered in July, 2012.The pair production of H can be huge due to the resonant production of heavy scalar S, namely PP → S → HH. The couplings of H with weak gauge boson are similar to ones in the SM and it implies that the couplings between S and gauge bosons are likely suppressed. Provided that S is heavy enough, the decay into weak gauge bosons may not be the dominant modes. Instead S can decay into a pair of H and offer the promising channel to discover it. In this paper, we studied the 5 promising decay modes of H, i.e. bb, WW^*, ZZ^*, γγ and τ+τ-, and simulated the signals and backgrounds for the 15 combination modes for HH at the LHC with √(s)= 14 TeV and integrated luminosity L=1000fb-1. We found that with the help of suitable selection rules, very good signal to background ratio S/B can be archived in many decay channels, for example b b+ (WW^*, ZZ^*, γγ, τ+τ-), WW^*+(WW^*, ZZ^*, γγ, τ+τ-) and τ+τ- +(γγ, τ+τ-). For the detailed results please refer to Table \reftab:discovery in the text. On the contrary, b b b b mode is less important due to the huge QCD background. However if one has excellent control on light jet mis-tagging, the b b b b mode can be promising to discover the extra Higgs boson due to its the largest branching ratio compared to other modes.