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Title: Interpreting 750 GeV diphoton excess in plain NMSSM

Abstract

NMSSM has enough ingredients to explain the diphoton excess at 750 GeV: singlet-like (pseudo) scalar (a) s and higgsinos as heavy vector-like fermions. We consider the production of the 750 GeV singlet-like pseudo scalar a from a decay of the doublet-like pseudo scalar A, and the subsequent decay of a into two photons via higgsino loop. We demonstrate that this cascade decay of the NMSSM Higgs bosons can explain the diphoton excess at 750 GeV.

Authors:
 [1];  [2];  [2]; ORCiD logo [3]
  1. Univ. of Warsaw, Warsaw (Poland); Univ. of California, Berkeley, CA (United States)
  2. Univ. of Warsaw, Warsaw (Poland)
  3. Univ. of Durham, Durham (United Kingdom)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1260054
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 760; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Badziak, Marcin, Olechowski, Marek, Pokorski, Stefan, and Sakurai, Kazuki. Interpreting 750 GeV diphoton excess in plain NMSSM. United States: N. p., 2016. Web. doi:10.1016/j.physletb.2016.06.057.
Badziak, Marcin, Olechowski, Marek, Pokorski, Stefan, & Sakurai, Kazuki. Interpreting 750 GeV diphoton excess in plain NMSSM. United States. doi:10.1016/j.physletb.2016.06.057.
Badziak, Marcin, Olechowski, Marek, Pokorski, Stefan, and Sakurai, Kazuki. 2016. "Interpreting 750 GeV diphoton excess in plain NMSSM". United States. doi:10.1016/j.physletb.2016.06.057.
@article{osti_1260054,
title = {Interpreting 750 GeV diphoton excess in plain NMSSM},
author = {Badziak, Marcin and Olechowski, Marek and Pokorski, Stefan and Sakurai, Kazuki},
abstractNote = {NMSSM has enough ingredients to explain the diphoton excess at 750 GeV: singlet-like (pseudo) scalar (a) s and higgsinos as heavy vector-like fermions. We consider the production of the 750 GeV singlet-like pseudo scalar a from a decay of the doublet-like pseudo scalar A, and the subsequent decay of a into two photons via higgsino loop. We demonstrate that this cascade decay of the NMSSM Higgs bosons can explain the diphoton excess at 750 GeV.},
doi = {10.1016/j.physletb.2016.06.057},
journal = {Physics Letters. Section B},
number = C,
volume = 760,
place = {United States},
year = 2016,
month = 6
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.physletb.2016.06.057

Citation Metrics:
Cited by: 19works
Citation information provided by
Web of Science

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  • NMSSM has enough ingredients to explain the diphoton excess at 750 GeV: singlet-like (pseudo) scalar (a) s and higgsinos as heavy vector-like fermions. We consider the production of the 750 GeV singlet-like pseudo scalar a from a decay of the doublet-like pseudo scalar A, and the subsequent decay of a into two photons via higgsino loop. We demonstrate that this cascade decay of the NMSSM Higgs bosons can explain the diphoton excess at 750 GeV.
  • Cited by 57
  • We examine whether the cosmic ray positron excess observed by PAMELA can be explained by neutralino annihilation in the next-to-minimal supersymmetric standard model (NMSSM). The main dark matter annihilation products are the lightest CP-even scalar h{sub 1} plus the lightest CP-odd scalar a{sub 1}, with the a{sub 1} decaying into two muons. The energetic positrons needed to explain PAMELA are thus obtained in the NMSSM simply from kinematics. The required large annihilation cross section is obtained from an s-channel resonance with the heavier CP-odd scalar a{sub 2}. Various experiments constrain the PAMELA-favored NMSSM parameter space, including collider searches for amore » light a{sub 1}. These constraints point to a unique corner of the NMSSM parameter space, having a lightest neutralino mass around 160 GeV and a very light pseudoscalar mass less than a GeV. A simple parametrized formula for the charge-dependent solar modulation effects reconciles the discrepancy between the PAMELA data and the estimated background at lower energies. We also discuss the electron and gamma-ray spectra from the Fermi LAT observations, and point out the discrepancy between the NMSSM predictions and Fermi LAT preliminary results and possible resolution. An NMSSM explanation of PAMELA makes three striking and uniquely correlated predictions: the rise in the PAMELA positron spectrum will turn over at around 70 GeV, the dark matter particle mass is less than the top quark mass, and a light sub-GeV pseudoscalar will be discovered at colliders.« less
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