| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Fed Paraiba, Dept Fis, BR-58059900 Joao Pessoa, Paraiba - Brazil
[2] Univ Fed Sao Paulo, Dept Ciencias Nat & Terra, Diadema, SP - Brazil
[3] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil
[4] Syracuse Univ, Dept Phys, Syracuse, NY 13244 - USA
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Physics Letters B; v. 757, p. 39-46, JUN 10 2016. |
| Web of Science Citations: | 50 |
| Abstract | |
The resonance S at similar to 750 GeV in the diphoton channel observed by ATLAS and CMS, if it holds up, is almost certainly the (S)cion of a larger dynasty in a UV completion that may very well be connected to the hierarchy problem. At this stage, however, an effective field theory framework provides a useful way to parametrize searches for this resonance in other channels. Assuming that the excess is due to a new scalar or pseudoscalar boson, we study associated production of S ({''}S-strahlung{''}) at the LHC and propose searches in several clean channels like gamma gamma ll, gamma gamma l is not an element of r and lll gamma is not an element of(T) to probe dimension-5 operators coupling S to Standard Model gauge bosons. We consider a range of widths for S, from 5 GeV to 45 GeV, and find that the three channels probe complementary regions of parameter space and the suppression scale Lambda. The finding of most immediate relevance is that with 3 fb(-1), the LHC might already reveal new excesses in the gamma gamma ll channel and a 5 (3) sigma discovery may already be possible after collecting 65 (25) fb(-1) of data with lll gamma is not an element of(T) events if the scale of the new physics is within similar to 9 TeV for couplings respecting 8 TeV LHC bounds and compatible with the observed excess in diphotons for a wide resonance as suggested by the ATLAS Collaboration. Beyond the EFT parametrization, we found realizations of models with heavy vector-like quarks and leptons which can simultaneously fit the diphoton excess and be discovered in the channels proposed here. (C) 2016 The Authors. Published by Elsevier B.V. (AU) | |
| FAPESP's process: | 13/22079-8 - Physics of particles and fields: standard model and its extensions |
| Grantee: | Adriano Antonio Natale |
| Support Opportunities: | Research Projects - Thematic Grants |