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10.1103-PhysRevD.92.092001.pdf (1.08 MB)

Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at vs = 8 TeV with the ATLAS detector at the LHC

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posted on 2023-06-09, 05:45 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
This paper presents a search for Higgs bosons decaying to four leptons, either electrons or muons, via one or two light exotic gauge bosons Zd, H ? ZZd ? 4l or H ? ZdZd ? 4l. The search was performed using pp collision data corresponding to an integrated luminosity of about 20??fb-¹ at the center-of-mass energy of vs = 8??TeV recorded with the ATLAS detector at the Large Hadron Collider. The observed data are well described by the Standard Model prediction. Upper bounds on the branching ratio of H ? ZZd ? 4l and on the kinetic mixing parameter between the Zd and the Standard Model hypercharge gauge boson are set in the range (1–9)×10-5 and (4–17)×10-2 respectively, at 95% confidence level assuming the Standard Model branching ratio of H ? ZZ* ? 4l, for Zd masses between 15 and 55 GeV. Upper bounds on the effective mass mixing parameter between the Z and the Zd are also set using the branching ratio limits in the H ? ZZd ? 4l search, and are in the range (1.5–8.7)×10-4 for 15

Funding

ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society

Issue

9

Volume

92

Page range

092001

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-04-11

First Open Access (FOA) Date

2017-04-11

First Compliant Deposit (FCD) Date

2017-04-11

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