Modelling Z→ττ processes in ATLAS with τ-embedded Z→μμ data

G. Aad 1 M.K. Ayoub 2 A. Bassalat 2 C. Becot 2 S. Binet 2 C. Bourdarios 2 J.B. de Vivie De Regie 2 D. Delgove 2 L. Duflot 2 M. Escalier 2 L. Fayard 2 D. Fournier 2 E.L. Gkougkousis 2 J.-F. Grivaz 2 T. Guillemin 2 F. Hariri 2 S. Henrot-Versillé 2 J. Hrivnac 2 L. Iconomidou-Fayard 2 M. Kado 2 A. Lounis 2 N. Makovec 2 N. Morange 2 C. Nellist 2 L. Poggioli 2 P. Puzo 2 A. Renaud 2 D. Rousseau 2 G. Rybkin 2 A.C. Schaffer 2 E. Scifo 2 L. Serin 2 S. Simion 2 R. Tanaka 2 H.L. Tran 2 D. Zerwas 2 Zhongkai Zhang 2 Y. Zhao 2 G. Rahal 3 D. Boumediene 4 Emmanuel Busato 4 D. Calvet 4 S. Calvet 4 J. Donini 4 E. Dubreuil 4 G. Gilles 4 Ph. Gris 4 H. Liao 4 R. Madar 4 D. Pallin 4 S.M. Romano Saez 4 C. Santoni 4 D. Simon 4 Timothée Theveneaux-Pelzer 4 F. Vazeille 4 L. Alio 1 M. Barbero 1 Y. Coadou 1 C. Diaconu 1 S. Diglio 1 F. Djama 1 O. Duccu 5, 1 L. Feligioni 1 J. Gao 1, 6 G.D. Hallewell 1 F. Hubaut 1 S.J. Kahn 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 J. Liu 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 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 Z. Barnovska 7 N. Berger 7 M. Delmastro 7 L. Di Ciaccio 7 S. Elles 7 T. Hryn’ova 7 S. Jézéquel 7 I. Koletsou 7 R. Lafaye 7 J. Leveque 7 N. Massol 7 G. Sauvage 7 E. Sauvan 7 O. Simard 7 T. Todorov 7 I. Wingerter-Seez 7 E. Yatsenko 7 S. Albrand 8 J. Brown 8 J. Collot 8 S. Crépé-Renaudin 8 P.A. Delsart 8 C. Gabaldon 8 M.H. Genest 8 J.Y. Hostachy 8 F. Ledroit-Guillon 8 A. Lleres 8 A. Lucotte 8 F. Malek 8 C. Monini 8 J. Stark 8 B. Trocmé 8 M. Wu 8
Abstract : This paper describes the concept, technical realisation and validation of a largely data-driven method to model events with Z→ττ decays. In Z→μμ events selected from proton-proton collision data recorded at s√=8 TeV with the ATLAS experiment at the LHC in 2012, the Z decay muons are replaced by τ leptons from simulated Z→ττ decays at the level of reconstructed tracks and calorimeter cells. The τ lepton kinematics are derived from the kinematics of the original muons. Thus, only the well-understood decays of the Z boson and τ leptons as well as the detector response to the τ decay products are obtained from simulation. All other aspects of the event, such as the Z boson and jet kinematics as well as effects from multiple interactions, are given by the actual data. This so-called τ-embedding method is particularly relevant for Higgs boson searches and analyses in ττ final states, where Z→ττ decays constitute a large irreducible background that cannot be obtained directly from data control samples.
Type de document :
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Journal of Instrumentation, IOP Publishing, 2015, 10, pp.P09018. 〈10.1088/1748-0221/10/09/P09018〉
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Soumis le : vendredi 19 juin 2015 - 10:37:19
Dernière modification le : mardi 22 mai 2018 - 21:48:09

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G. Aad, M.K. Ayoub, A. Bassalat, C. Becot, S. Binet, et al.. Modelling Z→ττ processes in ATLAS with τ-embedded Z→μμ data. Journal of Instrumentation, IOP Publishing, 2015, 10, pp.P09018. 〈10.1088/1748-0221/10/09/P09018〉. 〈in2p3-01165461〉

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