Abstract

A search for physics beyond the standard model in events with one or more high-momentum Higgs bosons, H, decaying to pairs of b quarks in association with missing transverse momentum is presented. The data, corresponding to an integrated luminosity of 35.9 fb^{-1}, were collected with the CMS detector at the LHC in proton-proton collisions at the center-of-mass energy sqrt[s]=13 TeV. The analysis utilizes a new b quark tagging technique based on jet substructure to identify jets from H→bb[over ¯]. Events are categorized by the multiplicity of H-tagged jets, jet mass, and the missing transverse momentum. No significant deviation from standard model expectations is observed. In the context of supersymmetry (SUSY), limits on the cross sections of pair-produced gluinos are set, assuming that gluinos decay to quark pairs, H (or Z), and the lightest SUSY particle, LSP, through an intermediate next-to-lightest SUSY particle, NLSP. With large mass splitting between the NLSP and LSP, and 100% NLSP branching fraction to H, the lower limit on the gluino mass is found to be 2010GeV.

Highlights

  • Primary motivations for building the CERN LHC [1] were to determine the source of electroweak symmetry breaking and to search for physics beyond the standard model (SM)

  • High-momentum Higgs bosons appear rarely in SM processes, and would provide a unique signature of new physics. Such a signature can arise in a variety of models for physics beyond the SM, including extended electroweak sectors [8,9], extended Higgs sectors [10], and supersymmetry (SUSY) [11,12]

  • Simulated event samples for SUSY signal models, used to determine the selection efficiency for signal events, are generated with MADGRAPH 5_aMC@NLO with up to two additional partons at leading order accuracy; they are normalized to cross sections computed to next-to-leading order (NLO) plus next-to-leading logarithmic (NLL) accuracy, based on Ref. [45]

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Summary

Introduction

Primary motivations for building the CERN LHC [1] were to determine the source of electroweak symmetry breaking and to search for physics beyond the standard model (SM). This Letter presents the first search for pairs of Lorentz-boosted Higgs bosons produced in association with jets and pmT iss.

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