Constraining CP-violating Higgs sectors at the LHC using gluon fusion

Dolan, Matthew J.; Harris, Philip; Jankowiak, Martin; Spannowsky, Michael

doi:10.1103/physrevd.90.073008

Constraining CP-violating Higgs sectors at the LHC using gluon fusion

Dolan, Matthew J.; Harris, Philip; Jankowiak, Martin; Spannowsky, Michael

Authors

Matthew J. Dolan

Philip Harris

Martin Jankowiak

Professor Michael Spannowsky michael.spannowsky@durham.ac.uk
Director

Abstract

We investigate the constraints that the LHC can set on a 126 GeV Higgs boson that is an admixture of CP eigenstates. Traditional analyses rely on Higgs couplings to massive vector bosons, which are suppressed for CP-odd couplings, so that these analyses have limited sensitivity. Instead we focus on Higgs production in gluon fusion, which occurs at the same order in αS for both CP-even and -odd Higgs couplings to top quarks. We study the Higgs plus two jet final state followed by Higgs decay into a pair of tau leptons. We show that using the 8 TeV data set it is possible to rule out the pure CP-odd hypothesis in this channel alone at nearly 95% C.L, assuming that the Higgs is CP-even. We also provide projected limits for the 14 TeV LHC run.

Citation

Dolan, M. J., Harris, P., Jankowiak, M., & Spannowsky, M. (2014). Constraining CP-violating Higgs sectors at the LHC using gluon fusion. Physical Review D, 90(7), Article 073008. https://doi.org/10.1103/physrevd.90.073008

Journal Article Type	Article
Publication Date	Oct 21, 2014
Deposit Date	Dec 12, 2014
Publicly Available Date	Apr 27, 2015
Journal	Physical Review D
Print ISSN	1550-7998
Electronic ISSN	1550-2368
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	90
Issue	7
Article Number	073008
DOI	https://doi.org/10.1103/physrevd.90.073008

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