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Implications of diphoton searches for a radion in the bulk-Higgs scenario

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Title
Implications of diphoton searches for a radion in the bulk-Higgs scenario
Author(s)
Peter Cox; Anibal D. Medina; Tirtha Sankar Ray; Andrew Spray
Publication Date
2017-02
Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS A, v.32, no.4, pp.1750020 -
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
Abstract
In this work, we point out that the apparent diphoton excess initially presented by the ATLAS and CMS collaborations could have originated from a radion in the bulk Higgs scenario within a warped extra dimension. In this scenario, the couplings of the radion to massive gauge bosons are suppressed, allowing it to evade existing searches. In the presence of mixing with the Higgs, due to the strong constraints from diboson searches, only points near what we denominate the alignment region were able to explain the diphoton signal and evade other experimental constraints. In light of the new measurements presented at ICHEP 2016 by both LHC collaborations, which do not confirm the initial diphoton excess, we study the current and future collider constraints on a radion within the bulk-Higgs scenario. We find that searches in the diphoton channel provide the most powerful probe of this scenario and already exclude large regions of parameter space, particularly for smaller warp factors. The radion has a sizeable branching ratio into top pairs and this channel may also give competitive constraints in the future. Finally, di-Higgs searches can provide a complementary probe in the case of nonzero radion-Higgs mixing but strong alignment. © 2017 World Scientific Publishing Company
URI
https://pr.ibs.re.kr/handle/8788114/3358
ISSN
0217-751X
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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