Gluons to Diphotons via New Particles with Half the Signal’s Invariant Mass
- Seoul National Univ. (Korea, Republic of)
- Seoul National Univ. (Korea, Republic of); Indiana Univ., Bloomington, IN (United States)
We report that any new particle charged under SU(3)C and carrying electric charge will leave an imprint in the di-photon invariant mass spectrum as it can mediate gg→γγ process through loops. The combination of properties of loop functions, threshold resummation and gluon pdfs can result in a peak-like feature in the di-photon invariant mass around twice the mass of a given particle even if the particle is short-lived and thus it doesn't form a narrow bound state. Using recent ATLAS analysis, we set upper limits on the combined SU(3)C and electric charge of new particles and indicate future prospects. Additionally, we discuss the possibility that the excess of events in the di-photon invariant mass spectrum around 750 GeV originates from loops of a particle with mass around 375 GeV.
- Research Organization:
- Indiana Univ., Bloomington, IN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Research Foundation of Korea (NRF)
- Grant/Contract Number:
- SC0010120; 0426-20140009; 0409-20150110
- OSTI ID:
- 1597032
- Alternate ID(s):
- OSTI ID: 1283424
- Journal Information:
- Physical Review Letters, Vol. 117, Issue 6; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Top-quark effects in diphoton production through gluon fusion at next-to-leading order in QCD
|
journal | October 2019 |
| Loop Induced Single Top Partner Production and Decay at the LHC | text | January 2018 |
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