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Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2018

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) , Jérémy Lévêque (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)
M. Aaboud
  • Fonction : Auteur
N. Berger
T. Hryn’ova
G. Aad
Y. Coadou
D. Calvet
S. Calvet

Résumé

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.

Dates et versions

in2p3-01446632 , version 1 (26-01-2017)

Identifiants

Citer

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, 2018, 78, pp.110. ⟨10.1140/epjc/s10052-017-5475-4⟩. ⟨in2p3-01446632⟩
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