Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV

The CMS Collaboration; A. M. Sirunyan; P. Eerola; H. Kirschenmann; J. Pekkanen; M. Voutilainen; J. Havukainen; J. K. Heikkilä; T. Järvinen; V. Karimäki; R. Kinnunen; T. Lampén; K. Lassila-Perini; S. Laurila; S. Lehti; T. Lindén; P. Luukka; T. Mäenpää; H. Siikonen; E. Tuominen; J. Tuominiemi; T. Tuuva

doi:10.1103/PhysRevLett.122.132003

Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV

The CMS Collaboration, A. M. Sirunyan, P. Eerola, H. Kirschenmann, J. Pekkanen, M. Voutilainen, J. Havukainen, J. K. Heikkilä, T. Järvinen, V. Karimäki, R. Kinnunen, T. Lampén, K. Lassila-Perini, S. Laurila, S. Lehti, T. Lindén, P. Luukka, T. Mäenpää, H. Siikonen, E. TuominenJ. Tuominiemi, T. Tuuva

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb(-1). The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is sigma(pp -> tZq -> tl(+) l(-) q) = 111 +/- 13 (stat)(-9)(+11) (syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.

Original language	English
Article number	132003
Journal	Physical Review Letters
Volume	122
Issue number	13
Number of pages	19
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.122.132003
Publication status	Published - 5 Apr 2019
MoE publication type	A1 Journal article-refereed

Fields of Science

114 Physical sciences

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PhysRevLett.122.132003Final published version, 388 KBLicence: CC BY

Cite this

The CMS Collaboration, Sirunyan, A. M., Eerola, P., Kirschenmann, H., Pekkanen, J., Voutilainen, M., Havukainen, J., Heikkilä, J. K., Järvinen, T., Karimäki, V., Kinnunen, R., Lampén, T., Lassila-Perini, K., Laurila, S., Lehti, S., Lindén, T., Luukka, P., Mäenpää, T., Siikonen, H., ... Tuuva, T. (2019). Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV. Physical Review Letters, 122(13), Article 132003. https://doi.org/10.1103/PhysRevLett.122.132003

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title = "Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV",

abstract = "The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb(-1). The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is sigma(pp -> tZq -> tl(+) l(-) q) = 111 +/- 13 (stat)(-9)(+11) (syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.",

keywords = "114 Physical sciences",

author = "{The CMS Collaboration} and Sirunyan, {A. M.} and P. Eerola and H. Kirschenmann and J. Pekkanen and M. Voutilainen and J. Havukainen and Heikkil{\"a}, {J. K.} and T. J{\"a}rvinen and V. Karim{\"a}ki and R. Kinnunen and T. Lamp{\'e}n and K. Lassila-Perini and S. Laurila and S. Lehti and T. Lind{\'e}n and P. Luukka and T. M{\"a}enp{\"a}{\"a} and H. Siikonen and E. Tuominen and J. Tuominiemi and T. Tuuva",

year = "2019",

month = apr,

day = "5",

doi = "10.1103/PhysRevLett.122.132003",

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The CMS Collaboration, Sirunyan, AM, Eerola, P , Kirschenmann, H , Pekkanen, J , Voutilainen, M, Havukainen, J, Heikkilä, JK, Järvinen, T, Karimäki, V , Kinnunen, R, Lampén, T, Lassila-Perini, K , Laurila, S , Lehti, S , Lindén, T , Luukka, P, Mäenpää, T, Siikonen, H, Tuominen, E , Tuominiemi, J & Tuuva, T 2019, 'Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV', Physical Review Letters, vol. 122, no. 13, 132003. https://doi.org/10.1103/PhysRevLett.122.132003

TY - JOUR

T1 - Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV

AU - The CMS Collaboration

AU - Sirunyan, A. M.

AU - Eerola, P.

AU - Kirschenmann, H.

AU - Pekkanen, J.

AU - Voutilainen, M.

AU - Havukainen, J.

AU - Heikkilä, J. K.

AU - Järvinen, T.

AU - Karimäki, V.

AU - Kinnunen, R.

AU - Lampén, T.

AU - Lassila-Perini, K.

AU - Laurila, S.

AU - Lehti, S.

AU - Lindén, T.

AU - Luukka, P.

AU - Mäenpää, T.

AU - Siikonen, H.

AU - Tuominen, E.

AU - Tuominiemi, J.

AU - Tuuva, T.

PY - 2019/4/5

Y1 - 2019/4/5

N2 - The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb(-1). The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is sigma(pp -> tZq -> tl(+) l(-) q) = 111 +/- 13 (stat)(-9)(+11) (syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.

AB - The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb(-1). The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is sigma(pp -> tZq -> tl(+) l(-) q) = 111 +/- 13 (stat)(-9)(+11) (syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.

KW - 114 Physical sciences

U2 - 10.1103/PhysRevLett.122.132003

DO - 10.1103/PhysRevLett.122.132003

M3 - Article

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

M1 - 132003

ER -