Search for pair-produced vectorlike B quarks in proton-proton collisions at s =8 TeV

V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Erö, M. Flechl, M. Friedl, R. Frühwirth, V. M. Ghete, C. Hartl, N. Hörmann, J. Hrubec, M. Jeitler, V. Knünz, A. König & 31 others M. Krammer, I. Krätschmer, D. Liko, T. Matsushita, I. Mikulec, D. Rabady, B. Rahbaran, H. Rohringer, J. Schieck, R. Schöfbeck, J. Strauss, W. Treberer-Treberspurg, W. Waltenberger, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Alderweireldt, T. Cornelis, E. A. De Wolf, X. Janssen, A. Knutsson, J. Lauwers, S. Luyckx, S. Ochesanu, R. Rougny, M. Van De Klundert, H. Van Haevermaet, P. Van Mechelen, A. Radi, CMS Collaboration

Research output: Contribution to journalArticle

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Abstract

A search for the production of a heavy B quark, having electric charge -1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb-1. The B quark is assumed to be pair produced and to decay in one of three ways: to tW, bZ, or bH. The search is carried out in final states with one, two, and more than two charged leptons, as well as in fully hadronic final states. Each of the channels in the exclusive final-state topologies is designed to be sensitive to specific combinations of the B quark-antiquark pair decays. The observed event yields are found to be consistent with the standard model expectations in all the final states studied. A statistical combination of these results is performed, and upper limits are set on the cross section of the strongly produced B quark-antiquark pairs as a function of the B quark mass. Lower limits on the B quark mass between 740 and 900 GeV are set at a 95% confidence level, depending on the values of the branching fractions of the B quark to tW, bZ, and bH. Overall, these limits are the most stringent to date.

Original languageEnglish
Article number112009
JournalPhysical Review D
Volume93
Issue number11
DOIs
Publication statusPublished - Jun 15 2016

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quarks
collisions
protons
decay
electric charge
leptons
confidence
bosons
topology
luminosity
cross sections

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., ... CMS Collaboration (2016). Search for pair-produced vectorlike B quarks in proton-proton collisions at s =8 TeV. Physical Review D, 93(11), [112009]. https://doi.org/10.1103/PhysRevD.93.112009

Search for pair-produced vectorlike B quarks in proton-proton collisions at s =8 TeV. / Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Knünz, V.; König, A.; Krammer, M.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Strauss, J.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C. E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; Cornelis, T.; De Wolf, E. A.; Janssen, X.; Knutsson, A.; Lauwers, J.; Luyckx, S.; Ochesanu, S.; Rougny, R.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Radi, A.; CMS Collaboration.

In: Physical Review D, Vol. 93, No. 11, 112009, 15.06.2016.

Research output: Contribution to journalArticle

Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, Knünz, V, König, A, Krammer, M, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rahbaran, B, Rohringer, H, Schieck, J, Schöfbeck, R, Strauss, J, Treberer-Treberspurg, W, Waltenberger, W, Wulz, CE, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, Cornelis, T, De Wolf, EA, Janssen, X, Knutsson, A, Lauwers, J, Luyckx, S, Ochesanu, S, Rougny, R, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Radi, A & CMS Collaboration 2016, 'Search for pair-produced vectorlike B quarks in proton-proton collisions at s =8 TeV', Physical Review D, vol. 93, no. 11, 112009. https://doi.org/10.1103/PhysRevD.93.112009
Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T et al. Search for pair-produced vectorlike B quarks in proton-proton collisions at s =8 TeV. Physical Review D. 2016 Jun 15;93(11). 112009. https://doi.org/10.1103/PhysRevD.93.112009
Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Asilar, E. ; Bergauer, T. ; Brandstetter, J. ; Brondolin, E. ; Dragicevic, M. ; Erö, J. ; Flechl, M. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hartl, C. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; Knünz, V. ; König, A. ; Krammer, M. ; Krätschmer, I. ; Liko, D. ; Matsushita, T. ; Mikulec, I. ; Rabady, D. ; Rahbaran, B. ; Rohringer, H. ; Schieck, J. ; Schöfbeck, R. ; Strauss, J. ; Treberer-Treberspurg, W. ; Waltenberger, W. ; Wulz, C. E. ; Mossolov, V. ; Shumeiko, N. ; Suarez Gonzalez, J. ; Alderweireldt, S. ; Cornelis, T. ; De Wolf, E. A. ; Janssen, X. ; Knutsson, A. ; Lauwers, J. ; Luyckx, S. ; Ochesanu, S. ; Rougny, R. ; Van De Klundert, M. ; Van Haevermaet, H. ; Van Mechelen, P. ; Radi, A. ; CMS Collaboration. / Search for pair-produced vectorlike B quarks in proton-proton collisions at s =8 TeV. In: Physical Review D. 2016 ; Vol. 93, No. 11.
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abstract = "A search for the production of a heavy B quark, having electric charge -1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb-1. The B quark is assumed to be pair produced and to decay in one of three ways: to tW, bZ, or bH. The search is carried out in final states with one, two, and more than two charged leptons, as well as in fully hadronic final states. Each of the channels in the exclusive final-state topologies is designed to be sensitive to specific combinations of the B quark-antiquark pair decays. The observed event yields are found to be consistent with the standard model expectations in all the final states studied. A statistical combination of these results is performed, and upper limits are set on the cross section of the strongly produced B quark-antiquark pairs as a function of the B quark mass. Lower limits on the B quark mass between 740 and 900 GeV are set at a 95{\%} confidence level, depending on the values of the branching fractions of the B quark to tW, bZ, and bH. Overall, these limits are the most stringent to date.",
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AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Knünz, V.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, A.

AU - Lauwers, J.

AU - Luyckx, S.

AU - Ochesanu, S.

AU - Rougny, R.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Radi, A.

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