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Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at √s=8 TeV. / The CMS collaboration.

In: Journal of High Energy Physics, Vol. 2017, No. 7, 3, 01.07.2017.

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The CMS collaboration. Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at √s=8 TeV. Journal of High Energy Physics. 2017 Jul 1;2017(7):3. doi: 10.1007/JHEP07(2017)003

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BibTeX

@article{80132b03bcd14c69a891e76fd7a4eb02,
title = "Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at √s=8 TeV",
abstract = "A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour-changing neutral current interactions. The data sample corresponds to an integrated luminosity of 19.7 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s=8 TeV. Final states with three leptons (electrons or muons) and at least one jet are investigated. An events yield compatible with tZq standard model production is observed, and the corresponding cross section is measured to be σ(pp → tZq → ℓνbℓ+ℓ−q) = 10− 7 + 8 fb with a significance of 2.4 standard deviations. No presence of flavour-changing neutral current production of tZq is observed. Exclusion limits at 95% confidence level on the branching fractions of a top quark decaying to a Z boson and an up or a charm quark are found to be ℬ(t → Zu) < 0.022% and ℬ(t → Zc) < 0.049%.",
keywords = "Flavour Changing Neutral Currents, Hadron-Hadron scattering (experiments), Top physics, COUPLINGS, DECAYS",
author = "{The CMS collaboration} and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and J. Strauss and W. Waltenberger and Wulz, {C. E.} and O. Dvornikov and V. Makarenko and V. Mossolov and {Suarez Gonzalez}, J. and V. Zykunov and N. Shumeiko and S. Alderweireldt and {De Wolf}, {E. A.} and X. Janssen and J. Lauwers and {Van De Klundert}, M. and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Remortel}, N. and {Van Spilbeeck}, A. and {Abu Zeid}, S. and F. Blekman and J. D{\textquoteright}Hondt and Y. Skovpen and D. Shtol",
year = "2017",
month = jul,
day = "1",
doi = "10.1007/JHEP07(2017)003",
language = "English",
volume = "2017",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer US",
number = "7",

}

RIS

TY - JOUR

T1 - Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at √s=8 TeV

AU - The CMS collaboration

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 - König, A.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Strauss, J.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Dvornikov, O.

AU - Makarenko, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Zykunov, V.

AU - Shumeiko, N.

AU - Alderweireldt, S.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Lauwers, J.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Van Spilbeeck, A.

AU - Abu Zeid, S.

AU - Blekman, F.

AU - D’Hondt, J.

AU - Skovpen, Y.

AU - Shtol, D.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour-changing neutral current interactions. The data sample corresponds to an integrated luminosity of 19.7 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s=8 TeV. Final states with three leptons (electrons or muons) and at least one jet are investigated. An events yield compatible with tZq standard model production is observed, and the corresponding cross section is measured to be σ(pp → tZq → ℓνbℓ+ℓ−q) = 10− 7 + 8 fb with a significance of 2.4 standard deviations. No presence of flavour-changing neutral current production of tZq is observed. Exclusion limits at 95% confidence level on the branching fractions of a top quark decaying to a Z boson and an up or a charm quark are found to be ℬ(t → Zu) < 0.022% and ℬ(t → Zc) < 0.049%.

AB - A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour-changing neutral current interactions. The data sample corresponds to an integrated luminosity of 19.7 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s=8 TeV. Final states with three leptons (electrons or muons) and at least one jet are investigated. An events yield compatible with tZq standard model production is observed, and the corresponding cross section is measured to be σ(pp → tZq → ℓνbℓ+ℓ−q) = 10− 7 + 8 fb with a significance of 2.4 standard deviations. No presence of flavour-changing neutral current production of tZq is observed. Exclusion limits at 95% confidence level on the branching fractions of a top quark decaying to a Z boson and an up or a charm quark are found to be ℬ(t → Zu) < 0.022% and ℬ(t → Zc) < 0.049%.

KW - Flavour Changing Neutral Currents

KW - Hadron-Hadron scattering (experiments)

KW - Top physics

KW - COUPLINGS

KW - DECAYS

UR - http://www.scopus.com/inward/record.url?scp=85022008132&partnerID=8YFLogxK

U2 - 10.1007/JHEP07(2017)003

DO - 10.1007/JHEP07(2017)003

M3 - Article

AN - SCOPUS:85022008132

VL - 2017

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 7

M1 - 3

ER -

ID: 10094682