Search for pair production of a new heavy quark that decays into a $W$ boson and a light quark in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

G. Aad; Z. Barnovska; N. Berger; M. Delmastro; L. Di Ciaccio; S. Elles; T. Hryn’ova; S. Jézéquel; I. Koletsou; R. Lafaye; J. Leveque; N. Massol; P. Mastrandrea; G. Sauvage; E. Sauvan; O. Simard; T. Todorov; E. Yatsenko; I. Wingerter-Seez; G . Rahal; M.K. Ayoub; A. Bassalat; C. Bécot; S. Binet; C. Bourdarios; D. Delgove; J-B. de Vivie De Regie; L. Duflot; M. Escalier; L. Fayard; D. Fournier; E.L. Gkougkousis; J-F. Grivaz; T. Guillemin; F. Hariri; S. Henrot-Versille; J. Hrivnac; L. Iconomidou-Fayard; M. Kado; A. Lounis; N. Makovec; N. Morange; C. Nellist; P. Petroff; L. Poggioli; P. Puzo; A. Renaud; D. Rousseau; G. Rybkin; A.C. Schaffer; E. Scifo; L. Serin; S. Simion; R. Tanaka; D. Zerwas; Zhongkai Zhang; Y. Zhao; L. Alio; M. Barbero; Y. Coadou; C. Diaconu; S. Diglio; F. Djama; O. Duccu; L. Feligioni; J. Gao; G.D. Hallewell; F. Hubaut; S.J. Kahn; E. B. F. G. Knoops; E. Le Guirriec; J. Liu; K. Liu; D. Madaffari; K. Mochizuki; E. Monnier; S. Muanza; Y. Nagai; E. Nagy; P. Pralavorio; A. Rozanov; T. Serre; M. Talby; R.E. Ticse Torres; E. Tiouchichine; S. Tisserant; J. Toth; F. Touchard; L. Vacavant; S. Albrand; J. Collot; S. Crépé-Renaudin; P.A. Delsart; C. Gabaldon; M.H. Genest; J.Y. Hostachy; F. Ledroit-Guillon; A. Lleres; A. Lucotte; F. Malek; C. Monini; J. Stark; B. Trocmé; M. Wu; D. Boumediene; E. Busato; D. Calvet; S. Calvet; J. Donini; E. Dubreuil; G. Gilles; Ph. Gris; H. Liao; R. Madar; D. Pallin; S.M. Romano Saez; C. Santoni; D. Simon; T. Theveneaux-Pelzer; F. Vazeille

doi:10.1103/PhysRevD.92.112007

Search for pair production of a new heavy quark that decays into a $W$ boson and a light quark in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

G. Aad ¹ Z. Barnovska ² N. Berger ² M. Delmastro ² L. Di Ciaccio ² S. Elles ² T. Hryn’ova ² S. Jézéquel ² I. Koletsou ² R. Lafaye ² J. Leveque ² N. Massol ² P. Mastrandrea ² G. Sauvage ² E. Sauvan ¹ O. Simard ² T. Todorov ² E. Yatsenko ² I. Wingerter-Seez ² G . Rahal ³ M.K. Ayoub ⁴ A. Bassalat ⁴ C. Bécot ⁴ S. Binet ⁴ C. Bourdarios ⁴ D. Delgove ⁴ J-B. de Vivie De Regie ⁴ L. Duflot ⁴ M. Escalier ⁴ L. Fayard ⁴ D. Fournier ⁴ E.L. Gkougkousis ⁴ J-F. Grivaz ⁴ T. Guillemin ⁴ F. Hariri ⁴ S. Henrot-Versille ⁴ J. Hrivnac ⁴ L. Iconomidou-Fayard ⁴ M. Kado ⁴ A. Lounis ⁴ N. Makovec ⁴ N. Morange ⁴ C. Nellist ⁴ P. Petroff ⁴ L. Poggioli ⁴ P. Puzo ⁴ A. Renaud D. Rousseau ⁴ G. Rybkin ⁴ A.C. Schaffer ⁴ E. Scifo ⁴ L. Serin ⁴ S. Simion ⁴ R. Tanaka ⁴ D. Zerwas ⁴ Zhongkai Zhang ⁴ Y. Zhao ⁴ L. Alio ¹ M. Barbero ¹ Y. Coadou ¹ C. Diaconu ¹ S. Diglio ¹ F. Djama ¹ O. Duccu ¹ L. Feligioni ¹ J. Gao ¹ G.D. Hallewell ¹ F. Hubaut ¹ S.J. Kahn ¹ E. B. F. G. Knoops ¹ E. Le Guirriec ¹ J. Liu ¹ K. Liu ¹ D. Madaffari ¹ K. Mochizuki ¹ E. Monnier ¹ S. Muanza ¹ Y. Nagai ¹ E. Nagy ¹ P. Pralavorio ¹ A. Rozanov ¹ T. Serre ¹ M. Talby ¹ R.E. Ticse Torres ¹ E. Tiouchichine ¹ S. Tisserant ¹ J. Toth ¹ F. Touchard ¹ L. Vacavant ¹ S. Albrand ⁵ J. Collot ⁵ S. Crépé-Renaudin ⁵ P.A. Delsart ⁵ C. Gabaldon ⁵ M.H. Genest ⁵ J.Y. Hostachy ⁵ F. Ledroit-Guillon ⁵ A. Lleres ⁵ A. Lucotte ⁵ F. Malek ⁵ C. Monini ⁵ J. Stark ⁵ B. Trocmé ⁵ M. Wu ⁵ D. Boumediene ⁶ E. Busato ⁶ D. Calvet ⁶ S. Calvet ⁶ J. Donini ⁶ E. Dubreuil ⁶ G. Gilles ⁶ Ph. Gris ⁶ H. Liao ⁶ R. Madar ⁶ D. Pallin ⁶ S.M. Romano Saez ⁶ C. Santoni ⁶ D. Simon ⁶ T. Theveneaux-Pelzer ⁶ F. Vazeille ⁶

1 CPPM - Centre de Physique des Particules de Marseille

2 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - Laboratoire d'Annecy de Physique des Particules

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

4 LAL - Laboratoire de l'Accélérateur Linéaire

5 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

6 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

Abstract : A search is presented for pair production of a new heavy quark ($Q$) that decays into a $W$ boson and a light quark ($q$) in the final state where one $W$ boson decays leptonically (to an electron or muon plus a neutrino) and the other $W$ boson decays hadronically. The analysis is performed using an integrated luminosity of 20.3 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC. No evidence of $Q\bar{Q}$ production is observed. New chiral quarks with masses below 690 GeV are excluded at 95% confidence level, assuming BR$(Q\to Wq)=1$. Results are also interpreted in the context of vectorlike quark models, resulting in the limits on the mass of a vectorlike quark in the two-dimensional plane of BR$(Q\to Wq)$ versus BR$(Q\to Hq)$.

Document type :

Journal articles

Domain :

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

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http://hal.in2p3.fr/in2p3-01199447
Contributor : Claudine Bombar <>
Submitted on : Tuesday, September 15, 2015 - 2:16:28 PM
Last modification on : Wednesday, March 25, 2020 - 4:38:57 PM

Search for pair production of a new heavy quark that decays into a $W$ boson and a light quark in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

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Search for pair production of a new heavy quark that decays into a $W$ boson and a light quark in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

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