The Lepton Flavour Violating Higgs Decays at the HL-LHC and the ILC

Banerjee, Shankha; Bhattacherjee, Biplob; Mitra, Manimala; Spannowsky, Michael

doi:10.1007/jhep07(2016)059

The Lepton Flavour Violating Higgs Decays at the HL-LHC and the ILC

Banerjee, Shankha; Bhattacherjee, Biplob; Mitra, Manimala; Spannowsky, Michael

Authors

Shankha Banerjee

Biplob Bhattacherjee

Manimala Mitra

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

Abstract

Run-I results from the CMS collaboration show an excess of events in the decay h → μτe with a local significances of 2.4σ. This could be the first hint of flavour violation in the Higgs sector. We summarise the bounds on the flavour violating Yukawa couplings from direct searches, low energy measurements and projected future experiments. We discuss the sensitivity of upcoming HL-LHC runs and future lepton colliders in measuring lepton-flavour violating couplings using an effective field theory framework. For the HL-LHC we find limits on BR(h → μτ ) and BR(h → eτ ) ≲ O(0.5)%O(0.5)% and on BR(h → eμ) ≲ O(0.02)%O(0.02)% . For an ILC with center-of-mass energy of 1 TeV we expect BR(h → eτ) and BR(h → μτ ) to be measurable down to O(0.2)%O(0.2)% .

Citation

Banerjee, S., Bhattacherjee, B., Mitra, M., & Spannowsky, M. (2016). The Lepton Flavour Violating Higgs Decays at the HL-LHC and the ILC. Journal of High Energy Physics, 2016(07), Article 059. https://doi.org/10.1007/jhep07%282016%29059

Journal Article Type	Article
Acceptance Date	Jun 29, 2016
Online Publication Date	Jul 12, 2016
Publication Date	Jul 12, 2016
Deposit Date	Nov 10, 2016
Publicly Available Date	Jan 25, 2017
Journal	Journal of High Energy Physics
Print ISSN	1126-6708
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed	Peer Reviewed
Volume	2016
Issue	07
Article Number	059
DOI	https://doi.org/10.1007/jhep07%282016%29059

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