Searching for massless dark photons at the lhc via higgs production

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http://hdl.handle.net/10138/299488

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Biswas , S , Gabrielli , E , Heikinheimo , M , Mele , B & Mele , B 2017 , ' Searching for massless dark photons at the lhc via higgs production ' , PoS Proceedings of Science , vol. 314 , 315 . < https://pos.sissa.it/314/ >

Title: Searching for massless dark photons at the lhc via higgs production
Author: Biswas, S.; Gabrielli, E.; Heikinheimo, M.; Mele, B.; Mele, B.
Contributor: University of Helsinki, Università di Trieste
University of Helsinki, Staff Services
Date: 2017
Language: eng
Number of pages: 4
Belongs to series: PoS Proceedings of Science
ISSN: 1824-8039
URI: http://hdl.handle.net/10138/299488
Abstract: Massless dark photons are predicted in hidden-sector models with an unbroken dark U(1) gauge symmetry. A particular class of these models, aiming to solve both the Yukawa-hierarchy and the dark-matter problems of the standard model, manifests natural Higgs nondecoupling properties for the dark photon. As a consequence, we show that the Higgs-boson production at colliders followed by the Higgs decay into a photon and a dark photon provides a very promising dark-photon production mechanism. This decay gives rise to an unconventional Higgs signature characterized by a resonating gamma-plus-missing-momentum system with a monochromatic photon. We discuss the sensitivity of the LHC to the corresponding signal for a Higgs boson produced in both gluon-fusion and vector-boson-fusion channels. © Copyright owned by the author(s).
Subject: Bosons, Dark matter
Gauge symmetries
Higgs boson
Photon production
The standard model
Vector boson, Photons
114 Physical sciences
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