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Measurement of the Z to tau tau Cross Section with the ATLAS Detector

G. Aad S. Albrand 1 M.L. Andrieux 1 B. Clement 1 J. Collot 1 S. Crépé-Renaudin 1 P.A. Delsart 1 J. Donini 1 D. Dzahini 1 J.Y. Hostachy 1 E. Laisne 1 F. Ledroit-Guillon 1 A. Lleres 1 A. Lucotte 1 F. Malek 1 P. Martin 1 F. Polci 1 J. Stark 1 X. Sun 1 B. Trocmé 1 C. Weydert 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 H. Bachacou 3 F. Bauer 3 N. Besson 3 N.M. Bolnet 3 M. Boonekamp 3 L. Chevalier 3 J. Ernwein 3 A.I. Etienvre 3 A. Formica 3 L. Gauthier 3 F. Giraud 3 C. Guyot 3 S. Hassani 3 W. Kozanecki 3 E. Lancon 3 J.F. Laporte 3 E. Le Menedeu 3 M. Legendre 3 B. Mansoulie 3 J.-P. Meyer 3 N. Morange 3 E. Mountricha 3 Thi Hong 3 R. Nicolaidou 3 A. Ouraou 3 D.M. Pomarede 3 B. Resende 3 C.R. Royon 3 Ph. Schune 3 J. Schwindling 3 O. Simard 3 M. Virchaux 3 C. Xu 3 J. Yu 3 H. Abreu 4 N. Andari 4 C. Arnault 4 E. Augé 4 P. Barrillon 4 M. Benoit 4 S. Binet 4 J.-B. Blanchard 4 C. Bourdarios 4 D. Breton 4 C. Collard 5 C. de la Taille 4 J.B. de Vivie de Regie 4 S. Diglio 4 L. Duflot 4 M. Escalier 4 A.C. Falou 4 L. Fayard 4 D. Fournier 4 J.-F. Grivaz 4 M. Heller 4 S. Henrot-Versillé 4 J. Hrivnac 4 L. Iconomidou-Fayard 4 J. Idarraga 4 M. Kado 4 A. Lounis 4 N. Makovec 4 P. Matricon 4 F. Niedercorn 4 L. Poggioli 4 P. Puzo 4 A. Renaud 4 D. Rousseau 4 X. Ruan 4 G. Rybkin 4 J.B. Sauvan 4 J. Schaarschmidt 4 A.C. Schaffer 4 L. Serin 4 S. Simion 4 R. Tanaka 4 J.J. Veillet 4 I. Vukotic 4 F. Wicek 4 D. Zerwas 4 Zhiqing Zhang 4 Emmanuel Busato 6 D. Calvet 6 S. Calvet 6 Reina Coromoto Camacho Toro 6 Diane Cinca 7 R. Febbraro 6 N. Ghodbane 6 C. Guicheney 6 D. Pallin 6 F. Podlyski 6 C. Santoni 6 L. P. Says 6 F. Vazeille 6 L. Aperio Bella 8 B. Aubert 8 N. Berger 8 J. Colas 8 L. Di Ciaccio 8 T.K.O. Doan 8 S. Elles 8 P. Ghez 8 M. Gouanère 8 C. Goy 8 T. Guillemin 8 L. Helary 8 T. Hryn'Ova 8 G. Ionescu 8 A. Jérémie 8 S. Jézéquel 8 M. Kataoka 8 J. Labbe 8 R. Lafaye 8 J. Leveque 8 N. Massol 8 P. Perrodo 8 H. Przysiezniak 8 G. Sauvage 8 E. Sauvan 8 T. Todorov 8 D. Tsionou 8 I. Wingerter-Seez 8 R. Zitoun 8 Y. Zolnierowski 8 T. Beau 9 S. Bordoni 9 G. Calderini 9 A. Camard 9 P. Cavalleri 9 E. Chareyre 9 S. de Cecco 9 F. Derue 9 D. Imbault 9 M.W. Krasny 9 D. Lacour 9 B. Laforge 9 O. Le Dortz 9 J. Lellouch 9 G. Marchiori 9 I. Nikolic-Audit 9 J. Ocariz 9 M. Ridel 9 L. Roos 9 Ph. Schwemling 9 Timothée Theveneaux-Pelzer 9 S. Trincaz-Duvoid 9 T.N. Trinh 9 F. Vannucci 10 S. Aoun 11 C. P. Bee 11 C. Benchouk 11 K. Bernardet 11 N. Bousson 11 J. C. Clémens 11 Y. Coadou 11 P. Delpierre 11 F. Djama 11 F. Etienne 11 L. Feligioni 11 F. Henry-Couannier 11 D. Hoffmann 11 F. Hubaut 11 E.B. F. G. Knoops 11 E. Le Guirriec 11 B. Li 11 E. Monnier 11 J. Odier 11 E. Petit 11 P. Pralavorio 11 Z. Qian 11 A. Rozanov 11 M. Talby 11 N. Tannoury 11 S. Tisserant 11 J. Toth 11 F. Touchard 11 L. Vacavant 11
Abstract : The Z to tau tau cross section is measured with the ATLAS experiment at the LHC in four different final states determined by the decay modes of the tau leptons: muon-hadron, electron-hadron, electron-muon, and muon-muon. The analysis is based on a data sample corresponding to an integrated luminosity of 36 pb^(-1), at a proton-proton center-of-mass energy of sqrt(s) = 7 TeV. Cross sections are measured separately for each final state in fiducial regions of high detector acceptance, as well as in the full phase space, over the mass region 66 - 116 GeV. The individual cross sections are combined and the product of the total Z production cross section and Z to tau tau branching fraction is measured to be 0.97 +/- 0.07(stat) +/- 0.06(syst) +/- 0.03(lumi), in agreement with NNLO calculations.
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G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the Z to tau tau Cross Section with the ATLAS Detector. Physical Review D, American Physical Society, 2011, 84, pp.112006. ⟨10.1103/PhysRevD.84.112006⟩. ⟨in2p3-00614506⟩

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