Higgs-like boson at 750 GeV and genesis of baryons

Davoudiasl, Hooman; Giardino, Pier Paolo; Zhang, Cen

doi:10.1103/PhysRevD.94.015006

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:

Davoudiasl, Hooman ^[1]; Giardino, Pier Paolo ^[1]; Zhang, Cen ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics

Publication Date:: Wed Jul 06 00:00:00 EDT 2016

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

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.

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                    Davoudiasl, Hooman, Giardino, Pier Paolo, & Zhang, Cen. Higgs-like boson at 750 GeV and genesis of baryons.  United States.  https://doi.org/10.1103/PhysRevD.94.015006

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                    Davoudiasl, Hooman, Giardino, Pier Paolo, and Zhang, Cen. Wed .  
"Higgs-like boson at 750 GeV and genesis of baryons".  United States.  https://doi.org/10.1103/PhysRevD.94.015006.  https://www.osti.gov/servlets/purl/1336103.

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@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         = {Wed Jul 06 00:00:00 EDT 2016},

  month        = {Wed Jul 06 00:00:00 EDT 2016}

}

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Works referenced in this record:

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Works referencing / citing this record:

Phenomenology of an $S U (2)_{1} \times S U (2)_{2} \times U (1)_{Y}$ model at the LHC
journal, January 2017

Chen, Chuan-Hung; Nomura, Takaaki
Physical Review D, Vol. 95, Issue 1
DOI: 10.1103/physrevd.95.015015

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Similar Records

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

Abstract

Citation Formats

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

Phenomenology of a 750 GeV singlet journal, February 2016

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

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

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

Violation of <i>CP</i> in variance, <i>C</i> asymmetry, and baryon asymmetry of the universe [Нарушение CP-инвариантности. C-асимметрия и барионная асимметрия Вселенной] journal, January 1991

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

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

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

Phenomenology of an S U ( 2 ) 1 × S U ( 2 ) 2 × U ( 1 ) Y model at the LHC journal, January 2017

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

Phenomenology of a 750 GeV singlet
journal, February 2016

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

Search for pair-produced vectorlike $B$ quarks in proton-proton collisions at $\sqrt{s} = 8 TeV$
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

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

Violation of <i>CP</i> in variance, <i>C</i> asymmetry, and baryon asymmetry of the universe [Нарушение CP-инвариантности. C-асимметрия и барионная асимметрия Вселенной]
journal, January 1991

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

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

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

Phenomenology of an $S U (2)_{1} \times S U (2)_{2} \times U (1)_{Y}$ model at the LHC
journal, January 2017