Search for lepton-flavour-violating $H\to\mu\tau$ decays of the Higgs boson with the ATLAS detector

G. Aad; Z. Barnovska; N. Berger; M. Delmastro; L. Di Ciaccio; S. Elles; T. Hryn’ova; S. Jézéquel; I. Koletsou; R. Lafaye; J. Leveque; N. Massol; G. Sauvage; E. Sauvan; O. Simard; T. Todorov; I. Wingerter-Seez; E. Yatsenko; G . Rahal; L. Alio; M. Barbero; Y. Coadou; C. Diaconu; S. Diglio; F. Djama; O. Duccu; L. Feligioni; J. Gao; G.D. Hallewell; F. Hubaut; S.J. Kahn; E. B. F. G. Knoops; E. Le Guirriec; J. Liu; K. Liu; D. Madaffari; K. Mochizuki; E. Monnier; S. Muanza; Y. Nagai; E. Nagy; P. Pralavorio; A. Rozanov; T. Serre; M. Talby; R.E. Ticse Torres; E. Tiouchichine; S. Tisserant; J. Toth; F. Touchard; L. Vacavant; S. Albrand; J. Brown; J. Collot; S. Crépé-Renaudin; P.A. Delsart; C. Gabaldon; M.H. Genest; J.Y. Hostachy; F. Ledroit-Guillon; A. Lleres; A. Lucotte; F. Malek; C. Monini; J. Stark; B. Trocmé; M. Wu; D. Boumediene; Emmanuel Busato; D. Calvet; S. Calvet; J. Donini; E. Dubreuil; G. Gilles; Ph. Gris; H. Liao; R. Madar; D. Pallin; S.M. Romano Saez; C. Santoni; D. Simon; Timothée Theveneaux-Pelzer; F. Vazeille

doi:10.1007/JHEP11(2015)211

Journal articles

Search for lepton-flavour-violating $H\to\mu\tau$ decays of the Higgs boson with the ATLAS detector

G. Aad ¹ Z. Barnovska ² N. Berger ² M. Delmastro ² L. Di Ciaccio ² S. Elles ² T. Hryn’ova ² S. Jézéquel ² I. Koletsou ² R. Lafaye ² J. Leveque ² N. Massol ² G. Sauvage ² E. Sauvan ² O. Simard ² T. Todorov ² I. Wingerter-Seez ² E. Yatsenko ² G . Rahal ³ L. Alio ¹ M. Barbero ¹ Y. Coadou ¹ C. Diaconu ¹ S. Diglio ¹ F. Djama ¹ O. Duccu ¹ L. Feligioni ¹ J. Gao ¹ G.D. Hallewell ¹ F. Hubaut ¹ S.J. Kahn ¹ E. B. F. G. Knoops ¹ E. Le Guirriec ¹ J. Liu ¹ K. Liu ¹ D. Madaffari ¹ K. Mochizuki ¹ E. Monnier ¹ S. Muanza ¹ Y. Nagai ¹ E. Nagy ¹ P. Pralavorio ¹ A. Rozanov ¹ T. Serre ¹ M. Talby ¹ R.E. Ticse Torres ¹ E. Tiouchichine ¹ S. Tisserant ¹ J. Toth ¹ F. Touchard ¹ L. Vacavant ¹ S. Albrand ⁴ J. Brown ⁴ J. Collot ⁴ S. Crépé-Renaudin ⁴ P.A. Delsart ⁴ C. Gabaldon ⁴ M.H. Genest ⁴ J.Y. Hostachy ⁴ F. Ledroit-Guillon ⁴ A. Lleres ⁴ A. Lucotte ⁴ F. Malek ⁴ C. Monini ⁴ J. Stark ⁴ B. Trocmé ⁴ M. Wu ⁴ D. Boumediene ⁵ Emmanuel Busato ⁵ D. Calvet ⁵ S. Calvet ⁵ J. Donini ⁵ E. Dubreuil ⁵ G. Gilles ⁵ Ph. Gris ⁵ H. Liao ⁵ R. Madar ⁵ D. Pallin ⁵ S.M. Romano Saez ⁵ C. Santoni ⁵ D. Simon ⁵ Timothée Theveneaux-Pelzer ⁵ F. Vazeille ⁵

1 CPPM - Centre de Physique des Particules de Marseille

2 LAPP - Laboratoire d'Annecy de Physique des Particules

3 CC-IN2P3 - Centre de Calcul de l'IN2P3

4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

5 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

Abstract : A direct search for lepton-flavour-violating (LFV) $H\to\mu\tau$ decays of the recently discovered Higgs boson with the ATLAS detector at the LHC is presented. The analysis is performed in the $H\to\mu\tau_{\mathrm{had}}$ channel, where $\tau_{\mathrm{had}}$ is a hadronically decaying $\tau$-lepton. The search is based on the data sample of proton--proton collisions collected by the ATLAS experiment corresponding to an integrated luminosity of 20.3 fb$^{-1}$ at a centre-of-mass energy of $\sqrt{s}=8$ TeV. No statistically significant excess of data over the predicted background is observed. The observed (expected) 95% confidence-level upper limit on the branching fraction, Br($H\to\mu\tau$), is 1.85% (1.24%).

Document type :

Journal articles

Domain :

Physics [physics] / High Energy Physics - Experiment [hep-ex]

Complete list of metadata

http://hal.in2p3.fr/in2p3-01185529
Contributor : Claudine Bombar <>
Submitted on : Thursday, August 20, 2015 - 3:16:24 PM
Last modification on : Tuesday, April 20, 2021 - 12:00:14 PM

Search for lepton-flavour-violating $H\to\mu\tau$ decays of the Higgs boson with the ATLAS detector

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Search for lepton-flavour-violating $H\to\mu\tau$ decays of the Higgs boson with the ATLAS detector

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