Measurement of the $W$-boson mass in pp collisions at $\sqrt{s}=7$ TeV with the ATLAS detector

M. Aaboud N. Berger 1 A.M. Burger 1 M. Delmastro 1 L. Di Ciaccio 1 S. Elles 1 K. Grevtsov 1 T. Guillemin 1 T. Hryn’ova 1 S. Jézéquel 1 I. Koletsou 1 R. Lafaye 1 J. Levêque 1 P. Mastrandea 1 E. Sauvan 1 B.H. Smart 1 S. Todorova-Nova 1 A. Vallier 1 I. Wingerter-Seez 1 E. Yatsenko 1 G. Aad 2 M. Alstaty 2 M. Barbero 2 A. Calandri 2 T.P. Calvet 2 Y. Coadou 2 K. de Vasconcelos Corga 2 C. Diaconu 2 F. Djama 2 V. Ellajosyula 2 L. Feligioni 2 A. Hadef 2 G.D. Hallewell 2 F. Hubaut 2 S.J. Kahn 2 E. B. F. G. Knoops 2 R. Kukla 2 E. Le Guirriec 2 K. Liu 2 D. Madaffari 2 E. Monnier 2 S. Muanza 2 E. Nagy 2 P. Pralavorio 2 Y. Rodina 3, 2 A. Rozanov 2 M. Talby 2 T. Theveneaux-Pelzer 2 R.E. Ticse Torres 2 S. Tisserant 2 J. Toth 4, 2 F. Touchard 2 L. Vacavant 2 R. Wolff 2 S. Berlendis 5 C. Camincher 5 J. Collot 5 S. Crépé-Renaudin 5 P.A. Delsart 5 C. Gabaldon 5 M.H. Genest 5 P.O.J. Gradin 5 J.Y. Hostachy 5 F. Ledroit-Guillon 5 A. Lleres 5 A. Lucotte 5 F. Malek 5 T. Meideck 5 E. Petit 5 J. Stark 5 B. Trocmé 5 D. Boumediene 6 E. Busato 6 D. Calvet 6 S. Calvet 6 A.R. Chomont 6 J. Donini 6 S. Ganguly 6 Ph. Gris 6 R. Madar 6 M. Marjanovic 6 D. Pallin 6 S.M. Romano Saez 6 C. Santoni 6 F. Vazeille 6
Abstract : A measurement of the mass of the $W$ boson is presented based on proton-proton collision data recorded in 2011 at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC, and corresponding to 4.6 fb$^{-1}$ of integrated luminosity. The selected data sample consists of $7.8 \times 10^6$ candidates in the $W\rightarrow \mu \nu$ channel and $5.9 \times 10^6$ candidates in the $W\rightarrow e \nu$ channel. The $W$-boson mass is obtained from template fits to the reconstructed distributions of the charged lepton transverse momentum and of the $W$ boson transverse mass in the electron and muon decay channels, yielding \begin{eqnarray} m_W &=& 80370 \pm 7 \, (\textrm{stat.}) \pm 11 \, (\textrm{exp. syst.}) \pm 14 \, (\textrm{mod. syst.}) \, \textrm{MeV} &=& 80370 \pm 19 \, \textrm{MeV}, \end{eqnarray} where the first uncertainty is statistical, the second corresponds to the experimental systematic uncertainty, and the third to the physics-modelling systematic uncertainty. A measurement of the mass difference between the $W^+$ and $W^-$ bosons yields $m_{W^+}-m_{W^-} = -29 \pm 28$ MeV.
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European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2018, 78, pp.110. 〈10.1140/epjc/s10052-017-5475-4〉
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Soumis le : jeudi 26 janvier 2017 - 10:52:58
Dernière modification le : samedi 16 juin 2018 - 17:52:01

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M. Aaboud, N. Berger, A.M. Burger, M. Delmastro, L. Di Ciaccio, et al.. Measurement of the $W$-boson mass in pp collisions at $\sqrt{s}=7$ TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2018, 78, pp.110. 〈10.1140/epjc/s10052-017-5475-4〉. 〈in2p3-01446632〉

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