A pseudoscalar decaying to photon pairs in the early LHC Run 2 data

Low, Matthew; Tesi, Andrea; Wang, Lian -Tao

doi:10.1007/JHEP03(2016)108

Title: A pseudoscalar decaying to photon pairs in the early LHC Run 2 data

Abstract

In this paper we explore the possibility of a pseudoscalar resonance to account for the 750 GeV diphoton excess observed both at ATLAS and at CMS. We analyze the ingredients needed from the low energy perspective to obtain a sufficiently large diphoton rate to explain the signal while avoiding constraints from other channels. Additionally, we point out composite Higgs models in which one can naturally obtain a pseudoscalar at the 750 GeV mass scale and we estimate the pseudoscalar couplings to standard model particles that one would have in such models. A generic feature of models that can explain the excess is the presence of new particles in addition to the 750 GeV state. In conclusion, we note that due to the origin of the coupling of the resonance to photons, one expects to see comparable signals in the Zγ, ZZ, and W W channels.

Authors:

Low, Matthew ^[1]; Tesi, Andrea ^[2]; Wang, Lian -Tao ^[3]

Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
Univ. of Chicago, IL (United States). Dept. of Physics. Enrico Fermi Inst.
Univ. of Chicago, IL (United States). Dept. of Physics. Kavli Inst. for Cosmological Physics. Enrico Fermi Inst.

Publication Date:: Wed Mar 16 00:00:00 EDT 2016

Research Org.:: Univ. of Chicago, IL (United States); Institute for Advanced Study, Princeton, NJ (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1326988

Grant/Contract Number:: SC0013642

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 3; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; beyond standard model; technicolor and composite models

Citation Formats


                    Low, Matthew, Tesi, Andrea, and Wang, Lian -Tao. A pseudoscalar decaying to photon pairs in the early LHC Run 2 data.  United States: N. p., 2016. 
Web.  doi:10.1007/JHEP03(2016)108.

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                    Low, Matthew, Tesi, Andrea, & Wang, Lian -Tao. A pseudoscalar decaying to photon pairs in the early LHC Run 2 data.  United States.  https://doi.org/10.1007/JHEP03(2016)108

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                    Low, Matthew, Tesi, Andrea, and Wang, Lian -Tao. Wed .  
"A pseudoscalar decaying to photon pairs in the early LHC Run 2 data".  United States.  https://doi.org/10.1007/JHEP03(2016)108.  https://www.osti.gov/servlets/purl/1326988.

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@article{osti_1326988,

  title        = {A pseudoscalar decaying to photon pairs in the early LHC Run 2 data},

  author       = {Low, Matthew and Tesi, Andrea and Wang, Lian -Tao},

  abstractNote = {In this paper we explore the possibility of a pseudoscalar resonance to account for the 750 GeV diphoton excess observed both at ATLAS and at CMS. We analyze the ingredients needed from the low energy perspective to obtain a sufficiently large diphoton rate to explain the signal while avoiding constraints from other channels. Additionally, we point out composite Higgs models in which one can naturally obtain a pseudoscalar at the 750 GeV mass scale and we estimate the pseudoscalar couplings to standard model particles that one would have in such models. A generic feature of models that can explain the excess is the presence of new particles in addition to the 750 GeV state. In conclusion, we note that due to the origin of the coupling of the resonance to photons, one expects to see comparable signals in the Zγ, ZZ, and W W channels.},

  doi          = {10.1007/JHEP03(2016)108},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 3,

  volume       = 2016,

  place        = {United States},

  year         = {Wed Mar 16 00:00:00 EDT 2016},

  month        = {Wed Mar 16 00:00:00 EDT 2016}

}

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Works referenced in this record:

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750 GeV diphoton resonance in a vector-like extension of Hill model at a 100 TeV hadron collider
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Liu, Ning; Wang, Wenyu; Zhang, Mengchao
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Title: A pseudoscalar decaying to photon pairs in the early LHC Run 2 data

Abstract

Citation Formats

Knocking on new physics’ door with a scalar resonance journal, March 2016

The LHC diphoton resonance and dark matter journal, April 2016

Composite models for the 750 GeV diphoton excess journal, March 2016

Search for high-mass diphoton resonances in p p collisions at s = 8 TeV with the ATLAS detector journal, August 2015

Search for diphoton resonances in the mass range from 150 to 850 GeV in pp collisions at s = 8 TeV journal, November 2015

Search for resonant t t ¯ production in proton-proton collisions at s = 8 TeV journal, January 2016

Search for new resonances in Wγ and Zγ final states in pp collisions at s = 8 TeV with the ATLAS detector journal, November 2014

Search for an additional, heavy Higgs boson in the $$H\rightarrow ZZ$$ H → Z Z decay channel at $$\sqrt{s} = 8\;\text{ TeV }$$ s = 8 TeV in $$pp$$ p p collision data with the ATLAS detector journal, January 2016

Search for resonant diboson production in the $$\mathrm {\ell \ell }q\bar{q}$$ ℓ ℓ q q ¯ final state in $$pp$$ p p collisions at $$\sqrt{s} = 8$$ s = 8 TeV with the ATLAS detector journal, February 2015

Search for production of $$WW/WZ$$ W W / W Z resonances decaying to a lepton, neutrino and jets in $$pp$$ p p collisions at $$\sqrt{s}=8$$ s = 8 TeV with the ATLAS detector journal, May 2015

Search for new phenomena in the dijet mass distribution using p p collision data at s = 8 TeV with the ATLAS detector journal, March 2015

Search for high-mass dilepton resonances in p p collisions at s = 8 TeV with the ATLAS detector journal, September 2014

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Search for resonant pair production of Higgs bosons decaying to two bottom quark–antiquark pairs in proton–proton collisions at 8 TeV journal, October 2015

Search for a CP-odd Higgs boson decaying to Zh in pp collisions at s = 8 TeV with the ATLAS detector journal, May 2015

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Beyond the minimal top partner decay journal, September 2015

The intermediate Higgs journal, August 2005

The other natural two Higgs doublet model journal, December 2011

Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at $$\sqrt{s}=7$$ s = 7 and 8 TeV in the ATLAS experiment journal, January 2016

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Flavor at ssc energies: A new mechanism for dynamically generated fermion masses journal, November 1991

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Higgs as a holographic pseudo-Goldstone boson journal, November 2003

The Simplest Little Higgs journal, August 2004

Theoretical aspects of massive gravity journal, May 2012

Kaluza-Klein states from large extra dimensions journal, March 1999

Composite scalar dark matter journal, July 2012

750 GeV diphoton resonance in a vector-like extension of Hill model at a 100 TeV hadron collider journal, September 2016

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Knocking on new physics’ door with a scalar resonance
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The LHC diphoton resonance and dark matter
journal, April 2016

Composite models for the 750 GeV diphoton excess
journal, March 2016

Search for high-mass diphoton resonances in $p p$ collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector
journal, August 2015

Search for diphoton resonances in the mass range from 150 to 850 GeV in pp collisions at $\sqrt{s} = 8 TeV$
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Search for resonant $t \bar{t}$ production in proton-proton collisions at $\sqrt{s} = 8 TeV$
journal, January 2016

Search for new resonances in Wγ and Zγ final states in pp collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector
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Search for new phenomena in the dijet mass distribution using $p p$ collision data at $\sqrt{s} = 8 TeV$ with the ATLAS detector
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Search for high-mass dilepton resonances in $p p$ collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector
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Search for Higgs boson pair production in the $$b\bar{b}b\bar{b}$$ b b ¯ b b ¯ final state from pp collisions at $$\sqrt{s} = 8$$ s = 8 TeVwith the ATLAS detector
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Search for resonant pair production of Higgs bosons decaying to two bottom quark–antiquark pairs in proton–proton collisions at 8 TeV
journal, October 2015

Search for a CP-odd Higgs boson decaying to Zh in pp collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector
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Search for dark matter, extra dimensions, and unparticles in monojet events in proton–proton collisions at $$\sqrt{s} = 8$$ s = 8 $$\,{\mathrm{TeV}}\,$$ TeV
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Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at $$\sqrt{s}=8~$$ s = 8 TeV with the ATLAS detector
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The minimal composite Higgs model
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Beyond the minimal top partner decay
journal, September 2015

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The other natural two Higgs doublet model
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journal, January 2016

Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 $$\,\text {TeV}$$ TeV
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Flavor at ssc energies: A new mechanism for dynamically generated fermion masses
journal, November 1991

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Higgs as a holographic pseudo-Goldstone boson
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The Simplest Little Higgs
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Theoretical aspects of massive gravity
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750 GeV diphoton resonance in a vector-like extension of Hill model at a 100 TeV hadron collider
journal, September 2016

Interpreting 750 GeV diphoton excess with R -parity violating supersymmetry
journal, January 2017

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