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Looking for a light Higgs boson in the Zγ→ℓℓγ channel

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journal contribution
posted on 13.12.2013, 00:00 by James S. Gainer, Wai-Yee Keung, Ian Low, Pedro Schwaller
The final state obtained when a Higgs boson decays to a photon and a Z boson has been mostly overlooked in current searches for a light Higgs boson. However, when the Z boson decays leptonically, all final state particles in this channel can be measured, allowing for accurate reconstructions of the Higgs mass and angular correlations. We determine the sensitivity of the Large Hadron Collider (LHC) running at center of mass energies of 8 and 14 TeV to Standard Model (SM) Higgs bosons with masses in the 120–130 GeV range. For the 8 TeV LHC, sensitivity to several times the SM cross section times branching ratio may be obtained with 20 inverse femtobarns of integrated luminosity, while for the 14 TeV LHC, the SM rate is probed with about 100 inverse femtobarns of integrated luminosity.


NSF Grant No. 1066293 for hospitality while revising this article. This work was supported in part by the U.S. Department of Energy under Contracts No. DE-AC02-06CH11357, No. DE-FG02- 91ER40684, and No. DE-FG02-84ER40173.


Publisher Statement

This is a copy of an article published in the Physical Review D © 2012 American Physical Society. The publication is available at http://prd.aps.org/


Gainer JS, Keung WY, Low I, Schwaller P. Looking for a light Higgs boson in the Z gamma -> l(l)over-bar gamma channel. Physical Review D. Aug 2012;86(3). DOI: 10.1103/PhysRevD.86.033010


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