Publication: LHC constraints on hidden gravitons
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We analyze LHC data in order to constrain the parameter space of new spin-2 particles universally coupled to the energy-momentum tensor. These new hypothetical particles are the so-called hidden gravitons, whose phenomenology at low energies is determined by two parameters: its mass and its dimensional coupling constant. Hidden gravitons arise in many different extensions of the Standard Model of particles and interactions and General Relativity. Their phenomenology has been studied mainly in relation to modifications of gravity and astrophysical signatures. In this work, we extend the constraints for heavy hidden gravitons, with masses larger than 1 GeV, by taking into account events collected by ATLAS and CMS in the WW channel, Drell-Yan processes, and the diphoton channel from proton-proton collisions at root s = 8TeV.
© The Authors 2022 We would like to thank Antonio Lopez Maroto for valuable discussions at the beginning of this study. R.L.D. was financially supported by the Ramon Areces Foundation, the INFN post-doctoral fellowship AAOODGF-2019-0000329 and the Spanish grant MICINN: PID2019-108655GB-I00. HVR is supported by funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme grant agreement No. 801781. The simulations have been carried out on the computing facilities of the Computational Center for Particle and Astrophysics (C2PAP) and the Leibniz Supercomputing Center (SuperMUC), on the local theory cluster (T30 cluster) of the Physics Department of the Technische Universitat Munchen (TUM), and on local computing facilities at the INFN-Firenze.