Kaluza-Klein graviton phenomenology for warped compactifications, and the 750&nbsp;GeV diphoton excess

Giddings, Steven B.; Zhang, Hao

doi:10.1103/PhysRevD.93.115002

Kaluza-Klein graviton phenomenology for warped compactifications, and the 750 GeV diphoton excess

Journal Article · Wed Jun 01 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.115002· OSTI ID:1602004

Giddings, Steven B. ^[1]; Zhang, Hao ^[2]

Univ. of California, Santa Barbara, CA (United States). Dept. of Physics; University of California, Santa Barbara
Univ. of California, Santa Barbara, CA (United States). Dept. of Physics

A generic prediction of scenarios with extra dimensions accessible in TeV-scale collisions is the existence of Kaluza-Klein excitations of the graviton. For a broad class of strongly-warped scenarios one expects to initially find an isolated resonance, whose phenomenology in the simplest cases is described by a simplified model with two parameters, its mass, and a constant Λ with units of mass parameterizing its coupling to the Standard Model stress tensor. These parameters are in turn determined by the geometrical configuration of the warped compactification. Here, we explore the possibility that the 750 GeV excess recently seen in 13 TeV data at ATLAS and CMS could be such a warped Kaluza-Klein graviton, and find a best-fit value Λ≈60 TeV. We find that while there is some tension between this interpretation and data from 8 TeV and from the dilepton channel at 13 TeV, it is not strongly excluded. However, in the simplest scenarios of this kind, such a signal should soon become apparent in both diphoton and dilepton channels.

View Accepted Manuscript (DOE)

Research Organization:: Regents of the University of California, Santa Barbara

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0011702

OSTI ID:: 1602004

Alternate ID(s):: OSTI ID: 1255316

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 11 Vol. 93; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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