2016/01/18 by Wei Chao, Chao, Wei
Medicine · Physics and Astronomy · #Biofield Effects and Biophysics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Origins and Evolution of Life #Quantum Mechanics and Applications
paper · pdf · doi:10.48550/arxiv.1601.04678
openalex publication_date 2016/01/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A resonance in the diphoton channel with invariant mass mγγ = 750 GeV was claimed by the ATLAS and CMS collaborations at the run-2 LHC with √(s)=13 TeV. In this paper, we explain this diphoton excess as a pseudo-scalar singlet, which is produced at the LHC through gluon fusion with exotic scalar quarks running in the loop. We point out the scalar singlet might trigger a two-step electroweak phase transition, which can be strongly first oder. By assuming there are CP violations associated with interactions of the scalar quarks, the model is found to be able to generate adequate baryon asymmetry of the Universe through the electroweak baryogenesis mechanism. Constraints on the model are studied.