Measurements of the Higgs boson production and decay rates and coupling strengths using $pp$ collision data at $\sqrt{s}=7$ and $8$ TeV in the ATLAS experiment

G. Aad 1 Z. Barnovska 2 N. Berger 2 M. Delmastro 2 L. Di Ciaccio 2 T.K.O. Doan 2 S. Elles 2 C. Goy 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 G . Rahal 3 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 M.K. Ayoub 5 A. Bassalat 5 C. Becot 5 S. Binet 5 C. Bourdarios 5 J.B. de Vivie De Regie 5 D. Delgove 5 L. Duflot 5 M. Escalier 5 L. Fayard 5 D. Fournier 5 E.L. Gkougkousis 5 J.-F. Grivaz 5 T. Guillemin 5 F. Hariri 5 S. Henrot-Versillé 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 M. Kado 5 A. Lounis 5 N. Makovec 5 N. Morange 5 C. Nellist 5 L. Poggioli 5 P. Puzo 5 A. Renaud D. Rousseau G. Rybkin 5 A.C. Schaffer 5 E. Scifo 5 L. Serin 5 S. Simion 5 R. Tanaka 5 H.L. Tran 5 D. Zerwas 5 Zhongkai Zhang 5 Y. Zhao 5 L. Alio 1 M. Barbero 1 Y. Coadou 1 C. Diaconu 1 S. Diglio 1 O. Duccu 6, 1 F. Djama 1 L. Feligioni 1 J. Gao 7 G.D. Hallewell 1 F. Hubaut 1 S.J. Kahn 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 B. Li J. Liu K. Liu D. Madaffari 1 K. Mochizuki 1 E. Monnier 1 S. Muanza 1 Y. Nagai 1 E. Nagy 1 P. Pralavorio 1 A. Rozanov 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 D. Boumediene 8 Emmanuel Busato 8 D. Calvet 8 S. Calvet 8 J. Donini 8 E. Dubreuil 8 G. Gilles 8 Ph. Gris 8 H. Liao 8 R. Madar 8 D. Pallin 8 S.M. Romano Saez 8 C. Santoni 8 D. Simon 8 Timothée Theveneaux-Pelzer 8 F. Vazeille 8
1 CPPM - Centre de Physique des Particules de Marseille
2 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - 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 LAL - Laboratoire de l'Accélérateur Linéaire
6 NIPNE - Horia Hulubei National Institute of Physics and Nuclear Engineering
7 MSE - Department of Materials Science and Engineering [Blacksburg]
8 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
Abstract : Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the $H\to\gamma\gamma,\, ZZ^*,\, WW^*,\, Z\gamma,\, b\bar{b},\, \tau\tau$ and $\mu\mu$ decay modes, and the constraints on the associated production with a pair of top quarks and on the off-shell coupling strengths of the Higgs boson. The results are based on the LHC proton-proton collision datasets, with integrated luminosities of up to 4.7 $\mathrm{fb}^{-1}$ at $\sqrt{s}=7$ TeV and 20.3 $\mathrm{fb}^{-1}$ at $\sqrt{s}=8$ TeV, recorded by the ATLAS detector in 2011 and 2012. Combining all production modes and decay channels, the measured signal yield, normalised to the Standard Model expectation, is $1.18^{+0.15}_{-0.14}$. The observed Higgs boson production and decay rates are interpreted in a leading-order coupling framework, exploring a wide range of benchmark coupling models both with and without assumptions on the Higgs boson width and on the Standard Model particle content in loop processes. The observed data are found to be compatible with the Standard Model expectations for a Higgs boson at a mass of 125.36 GeV for all models considered.
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Journal articles
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http://hal.in2p3.fr/in2p3-01178153
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Submitted on : Friday, July 17, 2015 - 3:00:11 PM
Last modification on : Tuesday, November 5, 2019 - 4:32:43 PM

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IN2P3 | LAPP | CNRS | UNIV-SAVOIE | CPPM | UGA | UNIV-AMU | LAL | LPSC | LPC-CLERMONT | PRES_CLERMONT | UNIV-PARIS-SACLAY

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G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Measurements of the Higgs boson production and decay rates and coupling strengths using $pp$ collision data at $\sqrt{s}=7$ and $8$ TeV in the ATLAS experiment. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76, pp.6. ⟨10.1140/epjc/s10052-015-3769-y⟩. ⟨in2p3-01178153⟩

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