750 GeV diphotons from supersymmetry with Dirac gauginos
Abstract
Motivated by the recent excess in the diphoton invariant mass near 750 GeV, we explore a supersymmetric extension of the Standard Model that includes the minimal set of superpartners as well as additional Dirac partner chiral superfields in the adjoint representation for each gauge group. The bino partner pseudoscalar is identified as the 750 GeV resonance, while superpotential interactions between it and the gluino (wino) partners yield production via gluon fusion (decay to photon pairs) at one-loop. The gauginos and these additional adjoint superpartners are married by a Dirac mass and must also have Majorana masses. While a large wino partner Majorana mass is necessary to explain the excess, the gluino can be approximately Dirac-like, providing benefits consistent with being both “supersoft” (loop corrections to the scalar masses from Dirac gauginos are free of logarithmic enhancements) and “supersafe” (the experimental limits on the squark/gluino masses can be relaxed due to the reduced production rate). Consistency with the measured Standard Model–like Higgs boson mass is imposed, and a numerical exploration of the parameter space is provided. Models that can account for the diphoton excess are additionally characterized by having couplings that can remain perturbative up to very high scales, while remainingmore »
- Authors:
-
- Univ. of Oregon, Eugene, OR (United States). Inst. of Theoretical Science
- Univ. of Washington, Seattle, WA (United States)
- Publication Date:
- Research Org.:
- Univ. of Oregon, Eugene, OR (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1601476
- Alternate Identifier(s):
- OSTI ID: 1272655; OSTI ID: 1736023
- Grant/Contract Number:
- SC0011640; SC0011637
- Resource Type:
- Journal Article: 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; Anomalies; Particle decays; Supersymmetric models; 43 PARTICLE ACCELERATORS; Anomalies, Particle decays, Supersymmetric models
Citation Formats
Cohen, Timothy, Kribs, Graham D., Nelson, Ann E., and Ostdiek, Bryan. 750 GeV diphotons from supersymmetry with Dirac gauginos. United States: N. p., 2016.
Web. doi:10.1103/PhysRevD.94.015031.
Cohen, Timothy, Kribs, Graham D., Nelson, Ann E., & Ostdiek, Bryan. 750 GeV diphotons from supersymmetry with Dirac gauginos. United States. https://doi.org/10.1103/PhysRevD.94.015031
Cohen, Timothy, Kribs, Graham D., Nelson, Ann E., and Ostdiek, Bryan. 2016.
"750 GeV diphotons from supersymmetry with Dirac gauginos". United States. https://doi.org/10.1103/PhysRevD.94.015031. https://www.osti.gov/servlets/purl/1601476.
@article{osti_1601476,
title = {750 GeV diphotons from supersymmetry with Dirac gauginos},
author = {Cohen, Timothy and Kribs, Graham D. and Nelson, Ann E. and Ostdiek, Bryan},
abstractNote = {Motivated by the recent excess in the diphoton invariant mass near 750 GeV, we explore a supersymmetric extension of the Standard Model that includes the minimal set of superpartners as well as additional Dirac partner chiral superfields in the adjoint representation for each gauge group. The bino partner pseudoscalar is identified as the 750 GeV resonance, while superpotential interactions between it and the gluino (wino) partners yield production via gluon fusion (decay to photon pairs) at one-loop. The gauginos and these additional adjoint superpartners are married by a Dirac mass and must also have Majorana masses. While a large wino partner Majorana mass is necessary to explain the excess, the gluino can be approximately Dirac-like, providing benefits consistent with being both “supersoft” (loop corrections to the scalar masses from Dirac gauginos are free of logarithmic enhancements) and “supersafe” (the experimental limits on the squark/gluino masses can be relaxed due to the reduced production rate). Consistency with the measured Standard Model–like Higgs boson mass is imposed, and a numerical exploration of the parameter space is provided. Models that can account for the diphoton excess are additionally characterized by having couplings that can remain perturbative up to very high scales, while remaining consistent with experimental constraints, the Higgs boson mass, and an electroweak scale which is not excessively fine-tuned.},
doi = {10.1103/PhysRevD.94.015031},
url = {https://www.osti.gov/biblio/1601476},
journal = {Physical Review. D.},
issn = {2470-0010},
number = 1,
volume = 94,
place = {United States},
year = {Tue Jul 26 00:00:00 EDT 2016},
month = {Tue Jul 26 00:00:00 EDT 2016}
}
Web of Science
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