From the 750 GeV diphoton resonance to multilepton excesses

Bae, Kyu Jung; Chen, Chuan-Ren; Hamaguchi, Koichi; Low, Ian

doi:10.1103/PhysRevD.94.015035

Title: From the 750 GeV diphoton resonance to multilepton excesses

Journal Article · Fri Jul 01 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.015035· OSTI ID:1371554

Bae, Kyu Jung; Chen, Chuan-Ren; Hamaguchi, Koichi; Low, Ian

Weakly coupled models for the 750 GeV diphoton resonance often invoke new particles carrying both color and/or electric charges to mediate loop-induced couplings of the resonance to two gluons and two photons. The new colored particles may not be stable and could decay into final states containing standard model particles. We consider an electroweak doublet of vectorlike quarks (VLQs) carrying electric charges of 5/3 and 2/3, respectively, which mediate the loop-induced couplings of the 750 GeV resonance. If the VLQ has a mass at around 1 TeV, it naturally gives rise to the observed diphoton signal strength while all couplings remain perturbative up to a high scale. At the same time, if the charge-5/3 VLQ decays into final states containing top quark and W boson, it would contribute to the multilepton excesses observed in both run 1 and run 2 data. It is also possible to incorporate a dark matter candidate in the decay final states to explain the observed relic density.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1371554

Journal Information:: Physical Review D, Vol. 94, Issue 1; ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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