Skip to Main content Skip to Navigation
Journal articles

Search for pair production of a new b' quark that decays to a Z boson and a bottom quark with the ATLAS detector

G. Aad S. Albrand 1 M.L. Andrieux 1 Q. Buat 1 B. Clement 1 J. Collot 1 S. Crépé-Renaudin 1 B. Dechenaux 1 T. Delemontex 1 P.A. Delsart 1 M.H. Genest 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 J. Wang 1 C. Weydert 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 D. Boumediene 3 Emmanuel Busato 3 D. Calvet 3 S. Calvet 3 Reina Coromoto Camacho Toro 3 Diane Cinca 4 J. Donini 3 R. Febbraro 3 N. Ghodbane 3 C. Guicheney 3 H. Liao 3 D. Pallin 3 Daniela Paredes Hernández 3 F. Podlyski 3 C. Santoni 3 L. P. Says 3 F. Vazeille 3 S. Aoun 5 C.P. Bee 5 C. Bertella 5 N. Bousson 5 J.C. Clémens 5 Y. Coadou 5 F. Djama 5 F. Etienne 5 L. Feligioni 5 F. Henry-Couannier 5 D. Hoffmann 5 F. Hubaut 5 E. B. F. G. Knoops 5 E. Le Guirriec 5 B. Li 5 J. Maurer 5 E. Monnier 5 J. Odier 5 P. Pralavorio 5 Z. Qian 5 A. Rozanov 5 M. Talby 5 N. Tannoury 5 S. Tisserant 5 J. Toth 5 F. Touchard 5 L. Vacavant 5 S. Abdel Khalek 6 H. Abreu 6 N. Andari 6 C. Arnault 6 E. Augé 6 P. Barrillon 6 M. Benoit 6 S. Binet 6 C. Bourdarios 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 S. Henrot-Versillé 6 J. Hrivnac 6 L. Iconomidou-Fayard 6 J. Idarraga 6 M. Kado 6 N. Lorenzo Martinez 6 A. Lounis 6 N. Makovec 6 P. Matricon 6 F. Niedercorn 6 L. Poggioli 6 P. Puzo 6 A. Renaud 6 D. Rousseau 6 G. Rybkin 6 J.B. Sauvan 6 J. Schaarschmidt 6 A.C. Schaffer 6 E. Scifo 6 L. Serin 6 S. Simion 6 R. Tanaka 6 M. Teinturier 6 J.J. Veillet 6 I. Vukotic 6 F. Wicek 6 D. Zerwas 6 Zhiqing Zhang 6 L. Aperio Bella 7 B. Aubert 7 N. Berger 7 J. Colas 7 M. Delmastro 7 L. Di Ciaccio 7 T.K.O. Doan 7 S. Elles 7 C. Goy 7 L. Helary 7 T. Hryn'Ova 7 A. Jérémie 7 S. Jézéquel 7 M. Kataoka 7 J. Labbe 7 R. Lafaye 7 J. Leveque 7 V.P. Lombardo 7 N. Massol 7 P. Perrodo 7 E. Petit 7 H. Przysiezniak 7 E. Richter-Was 7 G. Sauvage 7 E. Sauvan 7 M. Schwoerer 7 T. Todorov 7 D. Tsionou 7 I. Wingerter-Seez 7 R. Zitoun 7 Y. Zolnierowski 7
Abstract : A search is reported for the pair production of a new quark, b', with at least one b' decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb^-1 of integrated luminosity, were collected from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. Using events with a b-tagged jet and a Z boson reconstructed from opposite-charge electrons, the mass distribution of large transverse momentum b' candidates is tested for an enhancement. No evidence for a b' signal is detected in the observed mass distribution, resulting in the exclusion at 95% confidence level of b' quarks with masses m_{b'} < 400 GeV that decay entirely via b' to Z+b. In the case of a vector-like singlet b' mixing solely with the third Standard Model generation, masses m_{b'} < 358 GeV are excluded.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00685808
Contributor : Emmanuelle Vernay <>
Submitted on : Friday, April 6, 2012 - 9:35:24 AM
Last modification on : Friday, January 22, 2021 - 4:36:22 PM

Links full text

Identifiers

Citation

G. Aad, S. Albrand, M.L. Andrieux, Q. Buat, B. Clement, et al.. Search for pair production of a new b' quark that decays to a Z boson and a bottom quark with the ATLAS detector. Physical Review Letters, American Physical Society, 2012, 109, pp.071801. ⟨10.1103/PhysRevLett.109.071801⟩. ⟨in2p3-00685808⟩

Share

Metrics

Record views

429