Analysis of Top Quark Pair Production Signal from Neutral 2HDM Higgs Bosons at LHC. (11th November 2018)

• Record Type: Journal Article
• Authors: Hashemi, Majid; Jafarpour, Mahbobeh
• Other Names: Bilki Burak Academic Editor.
• Is Part Of: Advances in high energy physics. Volume 2018(2018)
• Publication Date: 2018-11-11
• Subjects: Particles (Nuclear physics) -- Periodicals; Particles (Nuclear physics); Periodicals; 539.76
• DOI: 10.1155/2018/4038243
• Languages: English
• ISSNs: 1687-7357

Abstract

Abstract : In this paper, the top quark pair production events are analyzed as a source of neutral Higgs bosons of the two Higgs doublet model type I at LHC. The production mechanism is p p → H / A → t t ¯ assuming a fully hadronic final state through t → W b → j j b . In order to distinguish the signal from the main background which is the standard model t t ¯, we benefit from the fact that the top quarks in signal events acquire large Lorentz boost due to the heavy neutral Higgs boson. This feature leads to three collinear jets (a fat jet) which is a discriminating tool for identification of the top quarks from the Higgs boson resonances. Events with two identified top jets are selected and the invariant mass of the top pair is calculated for both signal and background. It is shown that the low t a n β region has still some parts which can be covered by this analysis and has not yet been excluded by flavor physics data.