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Title: Higgs-like boson at 750 GeV and genesis of baryons

Abstract

Here, we propose that the diphoton excess at 750 GeV reported by ATLAS and CMS is due to the decay of an exo-Higgs scalar η associated with the breaking of a new SU(2)e symmetry, dubbed exo-spin. New fermions, exo-quarks and exo-leptons, get TeV-scale masses through Yukawa couplings with η and generate its couplings to gluons and photons at one loop. Furthermore, the matter content of our model yields a B-L anomaly under SU(2)e, whose breaking we assume entails a first-order phase transition. A nontrivial B-L asymmetry may therefore be generated in the early Universe, potentially providing a baryogenesis mechanism through the Standard Model (SM) sphaleron processes. The spontaneous breaking of SU(2)e can, in principle, directly lead to electroweak symmetry breaking, thereby accounting for the proximity of the mass scales of the SM Higgs and the exo-Higgs. This model can be distinguished from those comprising a singlet scalar and vector fermions by the discovery of TeV scale exo-vector bosons, corresponding to the broken SU(2)e generators, at the LHC.

Authors:
 [1];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1336103
Alternate Identifier(s):
OSTI ID: 1260433
Report Number(s):
BNL-112543-2016-JA
Journal ID: ISSN 2470-0010; PRVDAQ; KA2401012
Grant/Contract Number:  
SC00112704; SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HET; diphoton; fermions; ATLAS; CMS; symmetry; exospin

Citation Formats

Davoudiasl, Hooman, Giardino, Pier Paolo, and Zhang, Cen. Higgs-like boson at 750 GeV and genesis of baryons. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.015006.
Davoudiasl, Hooman, Giardino, Pier Paolo, & Zhang, Cen. Higgs-like boson at 750 GeV and genesis of baryons. United States. doi:10.1103/PhysRevD.94.015006.
Davoudiasl, Hooman, Giardino, Pier Paolo, and Zhang, Cen. Wed . "Higgs-like boson at 750 GeV and genesis of baryons". United States. doi:10.1103/PhysRevD.94.015006. https://www.osti.gov/servlets/purl/1336103.
@article{osti_1336103,
title = {Higgs-like boson at 750 GeV and genesis of baryons},
author = {Davoudiasl, Hooman and Giardino, Pier Paolo and Zhang, Cen},
abstractNote = {Here, we propose that the diphoton excess at 750 GeV reported by ATLAS and CMS is due to the decay of an exo-Higgs scalar η associated with the breaking of a new SU(2)e symmetry, dubbed exo-spin. New fermions, exo-quarks and exo-leptons, get TeV-scale masses through Yukawa couplings with η and generate its couplings to gluons and photons at one loop. Furthermore, the matter content of our model yields a B-L anomaly under SU(2)e, whose breaking we assume entails a first-order phase transition. A nontrivial B-L asymmetry may therefore be generated in the early Universe, potentially providing a baryogenesis mechanism through the Standard Model (SM) sphaleron processes. The spontaneous breaking of SU(2)e can, in principle, directly lead to electroweak symmetry breaking, thereby accounting for the proximity of the mass scales of the SM Higgs and the exo-Higgs. This model can be distinguished from those comprising a singlet scalar and vector fermions by the discovery of TeV scale exo-vector bosons, corresponding to the broken SU(2)e generators, at the LHC.},
doi = {10.1103/PhysRevD.94.015006},
journal = {Physical Review D},
number = 1,
volume = 94,
place = {United States},
year = {2016},
month = {7}
}

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Works referenced in this record:

Baryogenesis from an earlier phase transition
journal, March 2007


An SU(2) anomaly
journal, November 1982


Gravitational waves from phase transitions at the electroweak scale and beyond
journal, February 2007


Distinguishing dark matter stabilization symmetries using multiple kinematic edges and cusps
journal, July 2010


Computing decay rates for new physics theories with FeynRules  and MadGraph 5_aMC@NLO
journal, December 2015


New parton distribution functions from a global analysis of quantum chromodynamics
journal, February 2016


Simple U ( 1 ) gauge theory explanation of the diphoton excess
journal, March 2016


Search for heavy lepton resonances decaying to a Z boson and a lepton in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector
journal, September 2015

  • Aad, G.; Abbott, B.; Abdallah, J.
  • Journal of High Energy Physics, Vol. 2015, Issue 9
  • DOI: 10.1007/JHEP09(2015)108

Phenomenology of a 750 GeV singlet
journal, February 2016

  • Falkowski, Adam; Slone, Oren; Volansky, Tomer
  • Journal of High Energy Physics, Vol. 2016, Issue 2
  • DOI: 10.1007/JHEP02(2016)152

Cosmological baryon and lepton number in the presence of electroweak fermion-number violation
journal, November 1990


Parton distributions with QED corrections
journal, December 2013


Rays of light from the LHC
journal, April 2016


UFO – The Universal FeynRules Output
journal, June 2012

  • Degrande, Céline; Duhr, Claude; Fuks, Benjamin
  • Computer Physics Communications, Vol. 183, Issue 6
  • DOI: 10.1016/j.cpc.2012.01.022

Search for pair-produced vectorlike B quarks in proton-proton collisions at s = 8 TeV
journal, June 2016


Gravitational Waves from a Dark Phase Transition
journal, October 2015


Singlet scalar resonances and the diphoton excess
journal, April 2016


Scenarii for interpretations of the LHC diphoton excess: Two Higgs doublets and vector-like quarks and leptons
journal, May 2016


Barygenesis without grand unification
journal, June 1986


The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

  • Alwall, J.; Frederix, R.; Frixione, S.
  • Journal of High Energy Physics, Vol. 2014, Issue 7
  • DOI: 10.1007/JHEP07(2014)079

Automatic evaluation of UV and R 2 terms for beyond the Standard Model Lagrangians: A proof-of-principle
journal, December 2015


Automated event generation for loop-induced processes
journal, October 2015

  • Hirschi, Valentin; Mattelaer, Olivier
  • Journal of High Energy Physics, Vol. 2015, Issue 10
  • DOI: 10.1007/JHEP10(2015)146

What is the γγ resonance at 750 GeV?
journal, March 2016

  • Franceschini, Roberto; Giudice, Gian F.; Kamenik, Jernej F.
  • Journal of High Energy Physics, Vol. 2016, Issue 3
  • DOI: 10.1007/JHEP03(2016)144

FeynRules  2.0 — A complete toolbox for tree-level phenomenology
journal, August 2014

  • Alloul, Adam; Christensen, Neil D.; Degrande, Céline
  • Computer Physics Communications, Vol. 185, Issue 8
  • DOI: 10.1016/j.cpc.2014.04.012