Title: Search for invisible decays of the Higgs boson produced in association with a hadronically decaying vector boson in pp collisions at √s = 8 TeV with the ATLAS detector

Abstract

© CERN for the benefit of the ATLAS collaboration 2015. A search for Higgs boson decays to invisible particles is performed using 20.3 fb –1 of pp collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. The process considered is Higgs boson production in association with a vector boson (V = W or Z) that decays hadronically, resulting in events with two or more jets and large missing transverse momentum. No excess of candidates is observed in the data over the background expectation. The results are used to constrain V H production followed by H decaying to invisible particles for the Higgs boson mass range 115 < m H < 300 GeV. The 95%confidence-level observed upper limit on σ VH × BR(H → inv.) varies from 1.6 pb at 115 GeV to 0.13 pb at 300 GeV. Assuming Standard Model production and including the gg → H contribution as signal, the results also lead to an observed upper limit of 78%at 95%confidence level on the branching ratio of Higgs bosons decays to invisible particles at a mass of 125 GeV.

Authors:

Aad, G. ^[1]

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+ Show Author Affiliations

1. Aix-Marseille Univ. and CNRS/IN2P3, Marseille (France). et al.

Publication Date:

Sat Jul 18 00:00:00 EDT 2015

Research Org.:

SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC)

Contributing Org.:

ATLAS collaboration; The ATLAS Collaboration

OSTI Identifier:

1224967

Alternate Identifier(s):

OSTI ID: 1208650; OSTI ID: 1409421

Grant/Contract Number:  

AC02-06CH11357; AC02-05CH11231; SC00112704; AC03-76SF00515

Resource Type:

Accepted Manuscript

Journal Name:

European Physical Journal. C, Particles and Fields

Additional Journal Information:

Journal Volume: 75; Journal Issue: 7; Journal ID: ISSN 1434-6044

Publisher:

Springer

Country of Publication:

United States

Language:

English

Subject:

43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS