Test of CP Invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the ditau decay channel with the ATLAS detector

G. Aad 1 Z. Barnovska 2 N. Berger 2 M. Delmastro 2 L. Di Ciaccio 2 S. Elles 2 K. Grevtsov 2 T. Guillemin 2 T. Hryn’ova 2 S. Jézéquel 2 I. Koletsou 2 R. Lafaye 2 Jérémy Lévêque 2 P. Mastrandea 2 G. Sauvage 2 E. Sauvan 2 O. Simard 2 B.H. Smart 2 T. Todorov 2 I. Wingerter-Seez 2 E. Yatsenko 2 D. Boumediene 3 E. Busato 3 D. Calvet 3 S. Calvet 3 A.R. Chomont 3 J. Donini 3 Ph. Gris 3 H. Liao 3 R. Madar 3 D. Pallin 3 S.M. Romano Saez 3 C. Santoni 3 D. Simon 3 F. Vazeille 3 L. Alio 1 M. Barbero A. Calandri 1 T.P. Calvet 1 Y. Coadou 1 C. Diaconu 1 S. Diglio 1 F. Djama 1 V. Ellajosyula 1 L. Feligioni 1 J. Gao 1 A. Hadef 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 E. Nagy 1 P. Pralavorio 1 Y. Rodina 1 A. Rozanov 1 M. Talby 1 T. Theveneaux-Pelzer 1 R.E. Ticse Torres 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 L. Vacavant 1 Chen Wang 1 S. Albrand 4 S. Berlendis 4 C. Camincher 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 E. Petit 4 J. Stark 4 B. Trocmé 4 M. Wu 4 M.K. Ayoub 5 A. Bassalat 5 C. Bécot 5 S. Binet 5 C. Bourdarios 5 D. Delgove 5 J-B. de Vivie De Regie 5 L. Duflot 5 M. Escalier 5 L. Fayard 5 D. Fournier 5 E.L. Gkougkousis 5 J-F. Grivaz 5 F. Hariri 5 S. Henrot-Versille 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 M. Kado 5 A. Lounis 5 N. Makovec 5 N. Morange 5 C. Nellist 5 P. Petroff 5 L. Poggioli 5 P. Puzo 5 A. Renaud 5 D. Rousseau 5 G. Rybkin 5 A.C. Schaffer 5 E. Scifo 5 L. Serin 5 S. Simion 5 R. Tanaka 5 D. Zerwas 5 Zhongkai Zhang 5 Y. Zhao 5
Abstract : A test of CP invariance in Higgs boson production via vector-boson fusion using the method of the Optimal Observable is presented. The analysis exploits the decay mode of the Higgs boson into a pair of $\tau$ leptons and is based on 20.3 fb$^{-1}$ of proton-proton collision data at $\sqrt{s}$ = 8 TeV collected by the ATLAS experiment at the LHC. Contributions from CP-violating interactions between the Higgs boson and electroweak gauge bosons are described in an effective field theory framework, in which the strength of CP violation is governed by a single parameter $\tilde{d}$. The mean values and distributions of CP-odd observables agree with the expectation in the Standard Model and show no sign of CP violation. The CP-mixing parameter $\tilde{d}$ is constrained to the interval [-0.11,0.05] at 68% confidence level, consistent with the Standard Model expectation of $\tilde{d}=0$.
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European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76, pp.658. 〈10.1140/epjc/s10052-016-4499-5〉
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Soumis le : mardi 16 février 2016 - 11:17:59
Dernière modification le : lundi 22 octobre 2018 - 09:42:01

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G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Test of CP Invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the ditau decay channel with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76, pp.658. 〈10.1140/epjc/s10052-016-4499-5〉. 〈in2p3-01274774〉

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