Mono-Higgs signature in a fermionic dark matter model. (30th August 2017)

• Record Type: Journal Article
• Authors: Ghorbani, Karim; Khalkhali, Leila
• Is Part Of: Journal of physics. Volume 44:Number 10(2017:Oct.)
• Publication Date: 2017-08-30
• Subjects: dark matter theory -- collider searches -- mono-Higgs; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/aa823a
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: In light of the discovery of the Higgs boson we explore a mono-Higgs signature in association with dark matter pair production at the Large Hadron Collider (LHC) in a renormalizable model with a fermionic dark matter candidate. For two channels with γγ +MET and b b ̄ +MET in the final state we simulate the standard model (SM) backgrounds and signal events at s = 14 TeV. We then estimate the LHC sensitivities for various benchmark points for two integrated luminosities  = 300 fb − 1 and  = 3 ab − 1 . We constrain the Yukawa coupling of the dark matter–SM interaction, taking into account bounds from mono-Higgs signature, observed dark matter relic density, Higgs physics, perturbativity requirement and electroweak measurements. Concerning the mono-Higgs search, it turns out that the channel with the largest branching ratio, the b b ̄ channel, provides better sensitivity. There are found regions in the parameter space of the model compatible with all the bounds mentioned above which can be reached in future LHC studies.