Measurement of the mass difference between top and anti-top quarks in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

G. Aad; S. Albrand; J. Brown; Q. Buat; B. Clement; J. Collot; S. Crépé-Renaudin; B. Dechenaux; T. Delemontex; P.A. Delsart; C. Gabaldon; M.H. Genest; J.Y. Hostachy; E. Laisne; B.T. Le; F. Ledroit-Guillon; A. Lleres; A. Lucotte; F. Malek; C. Monini; J. Stark; X. Sun; B. Trocmé; C. Weydert; G. Rahal; D. Boumediene; Emmanuel Busato; D. Calvet; S. Calvet; J. Donini; E. Dubreuil; N. Ghodbane; Ph. Gris; C. Guicheney; H. Liao; D. Pallin; Daniela Paredes Hernández; F. Podlyski; C. Santoni; Timothée Theveneaux-Pelzer; Loïc Valery; F. Vazeille; S. Abdel Khalek; E. Augé; A. Bassalat; S. Binet; C. Bourdarios; C. de la Taille; J.B. de Vivie de Regie; L. Duflot; M. Escalier; L. Fayard; D. Fournier; J.-F. Grivaz; T. Guillemin; S. Henrot-Versillé; J. Hrivnac; L. Iconomidou-Fayard; J. Idarraga; M. Kado; N. Lorenzo Martinez; A. Lounis; N. Makovec; L. Poggioli; P. Puzo; A. Renaud; D. Rousseau; G. Rybkin; J.B. Sauvan; J. Schaarschmidt; A.C. Schaffer; E. Scifo; L. Serin; S. Simion; R. Tanaka; H.L. Tran; D. Zerwas; Zhiqing Zhang; N. Berger; M. Delmastro; L. Di Ciaccio; T.K.O. Doan; S. Elles; C. Goy; T. Hryn'Ova; S. Jézéquel; H. Keoshkerian; R. Lafaye; J. Leveque; V.P. Lombardo; N. Massol; E. Petit; H. Przysiezniak; G. Sauvage; E. Sauvan; M. Schwoerer; T. Todorov; I. Wingerter-Seez; R. Zitoun; L. Alio; M. Barbero; C. P. Bee; C. Bertella; N. Bousson; J. C. Clémens; Y. Coadou; F. Djama; F. Etienne; L. Feligioni; D. Hoffmann; F. Hubaut; E. B. F. G. Knoops; E. Le Guirriec; B. Li; J. Maurer; E. Monnier; Y. Nagai; J. Odier; P. Pralavorio; A. Rozanov; T. Serre; M. Talby; N. Tannoury; E. Tiouchichine; S. Tisserant; J. Toth; F. Touchard; M. Ughetto; L. Vacavant; I. Koletsou; O. Simard

doi:10.1016/j.physletb.2013.12.010

Journal articles

Measurement of the mass difference between top and anti-top quarks in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

G. Aad S. Albrand ¹ J. Brown ¹ Q. Buat ¹ B. Clement ¹ J. Collot ¹ S. Crépé-Renaudin ¹ B. Dechenaux ¹ T. Delemontex ¹ P.A. Delsart ¹ C. Gabaldon ¹ M.H. Genest ¹ J.Y. Hostachy ¹ E. Laisne ¹ B.T. Le ¹ F. Ledroit-Guillon ¹ A. Lleres ¹ A. Lucotte ¹ F. Malek ¹ C. Monini ¹ J. Stark ¹ X. Sun ¹ B. Trocmé ¹ C. Weydert ¹ G. Rahal ² D. Boumediene ³ Emmanuel Busato ³ D. Calvet ³ S. Calvet ³ J. Donini ³ E. Dubreuil ³ N. Ghodbane ³ Ph. Gris ³ C. Guicheney ³ H. Liao ³ D. Pallin ³ Daniela Paredes Hernández ³ F. Podlyski ³ C. Santoni ³ Timothée Theveneaux-Pelzer ³ Loïc Valery ³ F. Vazeille ³ S. Abdel Khalek ⁴ E. Augé ⁴ A. Bassalat ⁴ S. Binet ⁴ C. Bourdarios ⁴ C. de la Taille ⁴ J.B. de Vivie de Regie ⁴ L. Duflot ⁴ M. Escalier ⁴ L. Fayard ⁴ D. Fournier ⁴ J.-F. Grivaz ⁴ T. Guillemin ⁴ S. Henrot-Versillé ⁴ J. Hrivnac ⁴ L. Iconomidou-Fayard ⁴ J. Idarraga ⁴ M. Kado ⁴ N. Lorenzo Martinez ⁴ A. Lounis ⁴ N. Makovec ⁴ L. Poggioli ⁴ P. Puzo ⁴ A. Renaud ⁴ D. Rousseau ⁴ G. Rybkin ⁴ J.B. Sauvan ⁴ J. Schaarschmidt ⁴ A.C. Schaffer ⁴ E. Scifo ⁴ L. Serin ⁴ S. Simion ⁴ R. Tanaka ⁴ H.L. Tran ⁴ D. Zerwas ⁴ Zhiqing Zhang 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 E. Petit ⁵ H. Przysiezniak ⁵ G. Sauvage ⁵ E. Sauvan ⁵ M. Schwoerer ⁵ T. Todorov ⁵ I. Wingerter-Seez ⁵ R. Zitoun ⁵ L. Alio ⁶ M. Barbero ⁶ C. P. Bee ⁶ C. Bertella ⁶ N. Bousson ⁶ J. C. Clémens ⁶ Y. Coadou ⁶ F. Djama ⁶ F. Etienne ⁶ L. Feligioni ⁶ D. Hoffmann ⁶ F. Hubaut ⁶ E. B. F. G. Knoops ⁶ E. Le Guirriec ⁶ B. Li ⁶ J. Maurer ⁶ E. Monnier ⁶ Y. Nagai ⁶ J. Odier ⁶ P. Pralavorio ⁶ A. Rozanov ⁶ T. Serre ⁶ M. Talby ⁶ N. Tannoury ⁶ E. Tiouchichine ⁶ S. Tisserant ⁶ J. Toth ⁶ F. Touchard ⁶ M. Ughetto ⁶ L. Vacavant ⁶ I. Koletsou ⁵ O. Simard ⁵

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

2 CC-IN2P3 - Centre de Calcul de l'IN2P3

3 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

4 LAL - Laboratoire de l'Accélérateur Linéaire

5 LAPP - Laboratoire d'Annecy de Physique des Particules

6 CPPM - Centre de Physique des Particules de Marseille

Abstract : A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb-1 data sample of proton--proton collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC, events consistent with ttbar production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields mt-mtbar = 0.67 +/- 0.61 (stat) +/- 0.41 (syst) GeV, consistent with CPT invariance.

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Journal articles

Domain :

Physics [physics] / High Energy Physics - Experiment [hep-ex]

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http://hal.in2p3.fr/in2p3-00876571
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Measurement of the mass difference between top and anti-top quarks in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

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