2015/12/21 by James M. Cline, Cline, James M., Zuowei Liu +1 · 1 citation
Physics and Astronomy · #Baryon #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #FOS: Physical sciences #Fermion #Gauge boson #Gauge theory #High Energy Physics - Phenomenology (hep-ph) #Invariant mass #Large Hadron Collider #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pion #Pseudoscalar #Quantum mechanics #hep-ph
paper · pdf · doi:10.48550/arxiv.1512.06827
4 pages, 2 figures; v2: added figure and changed operator in eq. (13). Paper withdrawn because resonant production of heavy vector meson always dominates over the considered mechanism
openalex publication_date 2015/12/21 · arxiv created 2016/02/29 · arxiv updated 2016/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Motivated by excess diphoton events reported by ATLAS and CMS, we show that composite pseudoscalars, bound states of heavy fermions under a new confining gauge theory, can be pair-produced by Drell-Yan production if the constituent particles are electrically charged. The decays of these pion-like bound states into two photons can explain the observed events near 750 GeV. The model predicts that there should be significant numbers of 4-photon events from decays of the pseudoscalar pairs, as well as same-sign dilepton pairs at a somewhat lower invariant mass, or multijet signals, coming from decays of charge-2 pseudoscalars. These states and their decays are necessary for avoiding stable charged baryon-like relics in the new confining sector. A neutral baryon-like dark matter candidate of mass ∼ Nc× 375 GeV is a further prediction of the model, for SU(Nc) confining gauge group.