Measurement of the cross section of high transverse momentum $Z\rightarrow b\bar{b}$ production in proton--proton collisions at $\sqrt{s}=8 TeV$ with the ATLAS Detector - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Physics Letters B Année : 2014

Measurement of the cross section of high transverse momentum $Z\rightarrow b\bar{b}$ production in proton--proton collisions at $\sqrt{s}=8 TeV$ with the ATLAS Detector

G. Aad (1) , S. Albrand (2) , J. Brown (2) , J. Collot (2) , S. Crépé-Renaudin (2) , B. Dechenaux (2) , P.A. Delsart (2) , C. Gabaldon (2) , M.H. Genest (2) , J.Y. Hostachy (2) , B.T. Le (2) , F. Ledroit-Guillon (2) , A. Lleres (2) , A. Lucotte (2) , F. Malek (2) , C. Monini (2) , J. Stark (2) , B. Trocmé (2) , M. Wu (2) , G. Rahal (3) , D. Boumediene (4) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , J. Donini (4) , E. Dubreuil (4) , N. Ghodbane (4) , G. Gilles (4) , Ph. Gris (4) , C. Guicheney (4) , H. Liao (4) , D. Pallin (4) , Daniela Paredes Hernández (4) , F. Podlyski (4) , C. Santoni (4) , Timothée Theveneaux-Pelzer (4) , Loïc Valery (4) , F. Vazeille (4) , N. Berger (5) , M. Delmastro (5) , L. Di Ciaccio (5) , T.K.O. Doan (5) , S. Elles (5) , C. Goy (5) , T. Hryn'Ova (5) , S. Jézéquel (5) , H. Keoshkerian (5) , R. Lafaye (5) , J. Leveque (5) , V.P. Lombardo (5) , N. Massol (5) , H. Przysiezniak (5) , G. Sauvage (5) , E. Sauvan (5) , M. Schwoerer (5) , T. Todorov (5) , I. Wingerter-Seez (5) , S. Abdel Khalek (6) , E. Augé (6) , A. Bassalat (6) , C. Becot (6) , S. Binet (6) , C. Bourdarios (6) , D. Charfeddine (6) , C. de La Taille (6) , J.B. de Vivie de Regie (6) , L. Duflot (6) , M. Escalier (6) , L. Fayard (6) , D. Fournier (6) , J.-F. Grivaz (6) , T. Guillemin (6) , S. Henrot-Versillé (6) , J. Hrivnac (6) , L. Iconomidou-Fayard (6) , J. Idarraga (6) , M. Kado (6) , A. Lounis (6) , N. Makovec (6) , P. Matricon (6) , L. Poggioli (6) , P. Puzo (6) , A. Renaud (6) , D. Rousseau (6) , G. Rybkin (6) , A.C. Schaffer (6) , E. Scifo (6) , L. Serin (6) , S. Simion (6) , R. Tanaka (6) , H.L. Tran (6) , D. Zerwas (6) , Zhiqing Zhang (6) , L. Alio (1) , M. Barbero (1) , C. Bertella (1) , J. C. Clémens (1) , Y. Coadou (1) , Sara Diglio (1) , F. Djama (1) , L. Feligioni (1) , D. Hoffmann (1) , F. Hubaut (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , B. Li (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , S. Muanza (1) , Y. Nagai (1) , P. Pralavorio (1) , A. Rozanov (1) , T. Serre (1) , M. Talby (1) , N. Tannoury (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , M. Ughetto (1) , L. Vacavant (1) , I. Koletsou (5) , O. Simard (5)
G. Aad
N. Berger
C. Goy
T. Hryn'Ova
E. Augé
D. Rousseau
D. Zerwas
  • Fonction : Auteur
  • PersonId : 842996
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631
Y. Coadou

Résumé

This Letter reports the observation of a high transverse momentum $Z\rightarrow b\bar{b}$ signal in proton-proton collisions at $\sqrt{s}=8$ TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integrated luminosity of 19.5 fb$^{-1}$. The $Z\rightarrow b\bar{b}$ decay is reconstructed from a pair of b-tagged jets, clustered with the anti-$k_t$ jet algorithm with $R = 0.4$, that have low angular separation and form a dijet with $p_T > 200$ GeV. The signal yield is extracted from a fit to the dijet invariant mass distribution, with the dominant, multi-jet background mass shape estimated by employing a fully data-driven technique that reduces the dependence of the analysis on simulation. The fiducial cross section is determined to be \[ \sigma^\mathrm{fid}_{Z\rightarrow b\bar{b}} = 2.02 \pm 0.20 ({\rm stat.}) \pm0.25 ({\rm syst.)}\pm 0.06 ({\rm lumi.}){\rm\,pb} = 2.02 \pm{0.33}{\rm\,pb}, \] in good agreement with next-to-leading-order theoretical predictions.

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Dates et versions

in2p3-00984963 , version 1 (01-06-2021)

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G. Aad, S. Albrand, J. Brown, J. Collot, S. Crépé-Renaudin, et al.. Measurement of the cross section of high transverse momentum $Z\rightarrow b\bar{b}$ production in proton--proton collisions at $\sqrt{s}=8 TeV$ with the ATLAS Detector. Physics Letters B, 2014, 738, pp.25-43. ⟨10.1016/j.physletb.2014.09.020⟩. ⟨in2p3-00984963⟩
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