Multi-step production of a diphoton resonance. (24th April 2017)

• Record Type: Journal Article
• Authors: Dobrescu, Bogdan A; Fox, Patrick J; Kearney, John
• Is Part Of: Journal of physics. Volume 44:Number 6(2017:Jun.)
• Publication Date: 2017-04-24
• Subjects: collider phenomenology -- LHC -- beyond the standard model; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/aa6598
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: Among the questions that would be raised by the observation of a new resonance at the LHC, particularly pressing are those concerning the production mechanism: What is the initial state? Is the resonance produced independently or in association with other particles? Here we present two weakly-coupled renormalizable models for production of a diphoton resonance that differ in both their initial and final states. In one model, a scalar particle produced through gluon fusion decays into a diphoton particle and a light, long-lived pseudoscalar. In another model, a Z ′ boson produced from the annihilation of a strange-antistrange quark pair undergoes a cascade decay that leads to a diphoton particle and two sterile neutrinos. Various kinematic distributions may differentiate these models from the canonical model where a diphoton particle is directly produced in gluon fusion.