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Title: How resonance-continuum interference changes 750 GeV diphoton excess: Signal enhancement and peak shift

Abstract

A hypothetical new scalar resonance, a candidate explanation for the recently observed 750 GeV diphoton excess at the LHC 13 TeV, necessarily interferes with the continuum background gg → γγ. The interference has two considerable effects: (1) enhancing or suppressing diphoton signal rate due to the imaginary-part interference and (2) distorting resonance shape due to the real-part interference. We study them based on the best-fit analysis of two benchmark models: two Higgs doublets with ~50 GeV width (exhibiting the imaginary-part interference effect) and a singlet scalar with 5 GeV width (exhibiting the real-part one), both extended with vector-like fermions. Furthermore, we find that the resonance contribution can be enhanced by a factor of 2 (1.6) for 3 (6) fb signal rate, or the 68% CL allowed mass region is shifted by O (1) GeV. If the best-fit excess rate decreases in the future data, the interference effects will become more significant.

Authors:
 [1];  [2];  [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. KonKuk Univ., Seoul (Korea)
  3. KonKuk Univ., Seoul (Korea); Korea Institute for Advanced Study, Seoul (Korea)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1253728
Grant/Contract Number:  
AC02-76SF00515
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: 5; 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; Higgs physics; scattering amplitudes

Citation Formats

Jung, Sunghoon, Song, Jeonghyeon, and Yoon, Yeo Woong. How resonance-continuum interference changes 750 GeV diphoton excess: Signal enhancement and peak shift. United States: N. p., 2016. Web. https://doi.org/10.1007/JHEP05(2016)009.
Jung, Sunghoon, Song, Jeonghyeon, & Yoon, Yeo Woong. How resonance-continuum interference changes 750 GeV diphoton excess: Signal enhancement and peak shift. United States. https://doi.org/10.1007/JHEP05(2016)009
Jung, Sunghoon, Song, Jeonghyeon, and Yoon, Yeo Woong. Mon . "How resonance-continuum interference changes 750 GeV diphoton excess: Signal enhancement and peak shift". United States. https://doi.org/10.1007/JHEP05(2016)009. https://www.osti.gov/servlets/purl/1253728.
@article{osti_1253728,
title = {How resonance-continuum interference changes 750 GeV diphoton excess: Signal enhancement and peak shift},
author = {Jung, Sunghoon and Song, Jeonghyeon and Yoon, Yeo Woong},
abstractNote = {A hypothetical new scalar resonance, a candidate explanation for the recently observed 750 GeV diphoton excess at the LHC 13 TeV, necessarily interferes with the continuum background gg → γγ. The interference has two considerable effects: (1) enhancing or suppressing diphoton signal rate due to the imaginary-part interference and (2) distorting resonance shape due to the real-part interference. We study them based on the best-fit analysis of two benchmark models: two Higgs doublets with ~50 GeV width (exhibiting the imaginary-part interference effect) and a singlet scalar with 5 GeV width (exhibiting the real-part one), both extended with vector-like fermions. Furthermore, we find that the resonance contribution can be enhanced by a factor of 2 (1.6) for 3 (6) fb signal rate, or the 68% CL allowed mass region is shifted by O (1) GeV. If the best-fit excess rate decreases in the future data, the interference effects will become more significant.},
doi = {10.1007/JHEP05(2016)009},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2016,
place = {United States},
year = {2016},
month = {5}
}

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Works referenced in this record:

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

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


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


Footprints of New Strong Dynamics via Anomaly and the 750 GeV Diphoton
journal, April 2016


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


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

On the interpretation of a possible ∼ 750 GeV particle decaying into γγ
journal, March 2016

  • Ellis, John; Ellis, Sebastian A. R.; Quevillon, Jérémie
  • Journal of High Energy Physics, Vol. 2016, Issue 3
  • DOI: 10.1007/JHEP03(2016)176

Goldstones in diphotons
journal, April 2016

  • Bellazzini, Brando; Franceschini, Roberto; Sala, Filippo
  • Journal of High Energy Physics, Vol. 2016, Issue 4
  • DOI: 10.1007/JHEP04(2016)072

The QCD axion from aligned axions and diphoton excess
journal, April 2016


Singlet scalar resonances and the diphoton excess
journal, April 2016


A pseudoscalar decaying to photon pairs in the early LHC Run 2 data
journal, March 2016

  • Low, Matthew; Tesi, Andrea; Wang, Lian-Tao
  • Journal of High Energy Physics, Vol. 2016, Issue 3
  • DOI: 10.1007/JHEP03(2016)108

750 GeV Diphoton Excess from the Goldstino Superpartner
journal, April 2016


750 GeV diphoton resonance in a top and bottom seesaw model
journal, June 2016


Can the new resonance at LHC be a CP-odd Higgs boson?
journal, June 2016


A resonance without resonance: Scrutinizing the diphoton excess at 750 GeV
journal, April 2016


A SUSY inspired simplified model for the 750 GeV diphoton excess
journal, May 2016


The 750 GeV S -cion: Where else should we look for it?
journal, June 2016


Could the width of the diphoton anomaly signal a three-body decay?
journal, June 2016


The diphoton resonance as a gravity mediator of dark matter
journal, April 2016


Scalar explanation of diphoton excess at LHC
journal, June 2016


750 GeV Diphoton Excess May Not Imply a 750 GeV Resonance
journal, April 2016


Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar–Wise model
journal, April 2016


750 GeV diphotons from a D3-brane
journal, May 2016


Tricking Landau–Yang: How to obtain the diphoton excess from a vector resonance
journal, April 2016


Vector leptoquarks and the 750 GeV diphoton resonance at the LHC
journal, June 2016


750 GeV resonance in the dark left–right model
journal, May 2016


Interpreting 750 GeV diphoton excess in SU(5) grand unified theory
journal, June 2016


750 GeV diphotons: implications for supersymmetric unification
journal, March 2016

  • Hall, Lawrence J.; Harigaya, Keisuke; Nomura, Yasunori
  • Journal of High Energy Physics, Vol. 2016, Issue 3
  • DOI: 10.1007/JHEP03(2016)017

Higgs stability and the 750 GeV diphoton excess
journal, April 2016


Open Question: Could a Causal Discontinuity Explain Fluctuations in the CMBR Radiation Spectrum?
journal, January 2016

  • Beckwith, Andrew Walcott
  • Journal of High Energy Physics, Gravitation and Cosmology, Vol. 02, Issue 02
  • DOI: 10.4236/jhepgc.2016.22018

Resonance-Continuum Interference in the Diphoton Higgs Signal at the LHC
journal, June 2003


Bounding the Higgs Boson Width through Interferometry
journal, September 2013


Combined Measurement of the Higgs Boson Mass in p p Collisions at s = 7 and 8 TeV with the ATLAS and CMS Experiments
journal, May 2015


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


Minimal matter at the large hadron collider
journal, February 2010


The anatomy of electroweak symmetry breaking
journal, February 2008


CP -conserving two-Higgs-doublet model: The approach to the decoupling limit
journal, April 2003


Theory and phenomenology of two-Higgs-doublet models
journal, July 2012


Two Higgs doublet model with vectorlike leptons and contributions to pp → W W and H → W W
journal, February 2016

  • Dermíšek, Radovan; Lunghi, Enrico; Shin, Seodong
  • Journal of High Energy Physics, Vol. 2016, Issue 2
  • DOI: 10.1007/JHEP02(2016)119

Searches for new physics using the t t ¯ invariant mass distribution in p p collisions at s = 8 TeV
journal, November 2013


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


RunDec: a Mathematica package for running and decoupling of the strong coupling and quark masses
journal, December 2000


Vector boson pair production at the LHC
journal, July 2011

  • Campbell, John M.; Ellis, R. Keith; Williams, Ciaran
  • Journal of High Energy Physics, Vol. 2011, Issue 7
  • DOI: 10.1007/JHEP07(2011)018

    Works referencing / citing this record:

    Interference effects in t t ¯ $$ t\overline{t} $$ production at the LHC as a window on new physics
    journal, March 2019

    • Djouadi, Abdelhak; Ellis, John; Popov, Andrey
    • Journal of High Energy Physics, Vol. 2019, Issue 3
    • DOI: 10.1007/jhep03(2019)119

    Interference effects in the decays of spin-zero resonances into γγ and t t ¯ $$ t\overline{t} $$
    journal, July 2016

    • Djouadi, Abdelhak; Ellis, John; Quevillon, Jérémie
    • Journal of High Energy Physics, Vol. 2016, Issue 7
    • DOI: 10.1007/jhep07(2016)105

    Challenges and opportunities for heavy scalar searches in the t t ¯ $$ t\overline{t} $$ channel at the LHC
    journal, November 2016


    Signal-background interference for a singlet spin-0 digluon resonance at the LHC
    journal, August 2016


    Exploring peaks and valleys in the diphoton spectrum
    journal, October 2016