Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector

S. Chatrchyan; V. Khachatryan; A. M. Sirunyan; A. Tumasyan; W. Adam; T. Bergauer; M. Dragicevic; J. Erö; C. Fabjan; M. Friedl; R. Frühwirth; V. M. Ghete; J. Hammer; S. Hänsel; M. Hoch; N. Hörmann; J. Hrubec; M. Jeitler; W. Kiesenhofer; M. Krammer; D. Liko; I. Mikulec; M. Pernicka; B. Rahbaran; H. Rohringer; R. Schöfbeck; J. Strauss; A. Taurok; F. Teischinger; P. Wagner; W. Waltenberger; G. Walzel; E. Widl; C. E. Wulz; V. Mossolov; N. Shumeiko; J. Suarez Gonzalez; S. Bansal; L. Benucci; E. A. De Wolf; X. Janssen; T. Maes; L. Mucibello; S. Ochesanu; B. Roland; G. Organtini; B. Dahmes; J. Mans; N. Pastika; M. Sasseville; The CMS collaboration

doi:10.1007/JHEP08(2011)005

Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl, R. Frühwirth, V. M. Ghete, J. Hammer, S. Hänsel, M. Hoch, N. Hörmann, J. Hrubec, M. Jeitler, W. Kiesenhofer, M. KrammerD. Liko, I. Mikulec, M. Pernicka, B. Rahbaran, H. Rohringer, R. Schöfbeck, J. Strauss, A. Taurok, F. Teischinger, P. Wagner, W. Waltenberger, G. Walzel, E. Widl, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Bansal, L. Benucci, E. A. De Wolf, X. Janssen, T. Maes, L. Mucibello, S. Ochesanu, B. Roland, G. Organtini, B. Dahmes, J. Mans, N. Pastika, M. Sasseville, The CMS collaboration

Physics and Astronomy (Twin Cities)

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Abstract

An inclusive search for same-sign top-quark pair production in pp collisions at √s = 7TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb ^-1. This analysis is motivated by recent studies of pp → tt reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z'). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z' mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results.

Original language	English (US)
Article number	5
Journal	Journal of High Energy Physics
Volume	2011
Issue number	8
DOIs	https://doi.org/10.1007/JHEP08(2011)005
State	Published - 2011

Keywords

Hadron-Hadron Scattering

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10.1007/JHEP08(2011)005

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Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hammer, J., Hänsel, S., Hoch, M., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., ... The CMS collaboration (2011). Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector. Journal of High Energy Physics, 2011(8), Article 5. https://doi.org/10.1007/JHEP08(2011)005

Chatrchyan, S, Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Bergauer, T, Dragicevic, M, Erö, J, Fabjan, C, Friedl, M, Frühwirth, R, Ghete, VM, Hammer, J, Hänsel, S, Hoch, M, Hörmann, N, Hrubec, J, Jeitler, M, Kiesenhofer, W, Krammer, M, Liko, D, Mikulec, I, Pernicka, M, Rahbaran, B, Rohringer, H, Schöfbeck, R, Strauss, J, Taurok, A, Teischinger, F, Wagner, P, Waltenberger, W, Walzel, G, Widl, E, Wulz, CE, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Bansal, S, Benucci, L, De Wolf, EA, Janssen, X, Maes, T, Mucibello, L, Ochesanu, S, Roland, B, Organtini, G, Dahmes, B, Mans, J, Pastika, N, Sasseville, M & The CMS collaboration 2011, 'Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector', Journal of High Energy Physics, vol. 2011, no. 8, 5. https://doi.org/10.1007/JHEP08(2011)005

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title = "Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector",

abstract = "An inclusive search for same-sign top-quark pair production in pp collisions at √s = 7TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb -1. This analysis is motivated by recent studies of pp → tt reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z'). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z' mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results.",

keywords = "Hadron-Hadron Scattering",

author = "S. Chatrchyan and V. Khachatryan and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and T. Bergauer and M. Dragicevic and J. Er{\"o} and C. Fabjan and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and J. Hammer and S. H{\"a}nsel and M. Hoch and N. H{\"o}rmann and J. Hrubec and M. Jeitler and W. Kiesenhofer and M. Krammer and D. Liko and I. Mikulec and M. Pernicka and B. Rahbaran and H. Rohringer and R. Sch{\"o}fbeck and J. Strauss and A. Taurok and F. Teischinger and P. Wagner and W. Waltenberger and G. Walzel and E. Widl and Wulz, {C. E.} and V. Mossolov and N. Shumeiko and {Suarez Gonzalez}, J. and S. Bansal and L. Benucci and {De Wolf}, {E. A.} and X. Janssen and T. Maes and L. Mucibello and S. Ochesanu and B. Roland and G. Organtini and B. Dahmes and J. Mans and N. Pastika and M. Sasseville and {The CMS collaboration}",

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T1 - Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector

AU - Chatrchyan, S.

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hammer, J.

AU - Hänsel, S.

AU - Hoch, M.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kiesenhofer, W.

AU - Krammer, M.

AU - Liko, D.

AU - Mikulec, I.

AU - Pernicka, M.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Teischinger, F.

AU - Wagner, P.

AU - Waltenberger, W.

AU - Walzel, G.

AU - Widl, E.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Bansal, S.

AU - Benucci, L.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Maes, T.

AU - Mucibello, L.

AU - Ochesanu, S.

AU - Roland, B.

AU - Organtini, G.

AU - Dahmes, B.

AU - Mans, J.

AU - Pastika, N.

AU - Sasseville, M.

AU - The CMS collaboration

PY - 2011

Y1 - 2011

N2 - An inclusive search for same-sign top-quark pair production in pp collisions at √s = 7TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb -1. This analysis is motivated by recent studies of pp → tt reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z'). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z' mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results.

AB - An inclusive search for same-sign top-quark pair production in pp collisions at √s = 7TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 pb -1. This analysis is motivated by recent studies of pp → tt reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z'). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or pp collisions. Limits are set as a function of the Z' mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results.

KW - Hadron-Hadron Scattering

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U2 - 10.1007/JHEP08(2011)005

DO - 10.1007/JHEP08(2011)005

M3 - Article

AN - SCOPUS:80053159756

SN - 1126-6708

VL - 2011

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 8

M1 - 5

ER -

Search for same-sign top-quark pair production at √s = 7 TeV and limits on avour changing neutral currents in the top sector

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