Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2012.09.031

Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector

ATLAS Collaboration

School of Physics and Astronomy

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

129 Scopus citations

Abstract

We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb⁻¹ of pp collision data at s=7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σ_t=83±4(stat.)₋₁₉ ⁺²⁰(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |V_tb|≫|V_ts|,|V_td|, the coupling strength at the W-t-b vertex is determined to be |V_tb|=1.13_−0.13 ^+0.14. If it is assumed that |V_tb|⩽1 a lower limit of |V_tb|>0.75 is obtained at the 95% confidence level.

Original language	English
Pages (from-to)	330-350
Number of pages	21
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	717
Issue number	4-5
DOIs	https://doi.org/10.1016/j.physletb.2012.09.031
State	Published - 31 Oct 2012

Funding

Funders	Funder number
AvH Foundation
Benoziyo Center , Israel
CEA-DSM/IRFU
Cantons of Bern and Geneva
DIP
DNSRC
DST/NRF
GNAS
MECTS
MERYS
MES of Russia
MSMT
MSSR
MSTD
MVZT
VSC CR
National Science Foundation	1119200
National Science Foundation
U.S. Department of Energy
Healthcare Georgia Foundation
Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)
School of Energy Resources, University of Wyoming
Türkiye Atom Enerjisi Kurumu
Arizona-Nevada Academy of Science
CERN
National Research Council
College of Arts and Sciences, University of Nebraska-Lincoln
Engineering Research Centers
Natural Sciences and Engineering Research Council of Canada
Science and Technology Facilities Council	PP/E002757/1, ST/F007337/1, ST/I003142/1, ST/I005803/1, ST/J004944/1, PP/E000347/1, ST/H001069/2, ST/K501840/1, ST/L001195/1, ST/H001026/1, ST/H001042/1, ST/I006080/1, ST/H001042/2, ST/I000186/1, ST/J004928/1, ST/K001361/1, ST/I003517/1, GRIDPP, ST/G502320/1, ST/K001310/1, ST/K001337/1, ST/H00100X/1, ST/L001144/1, ST/J002798/1, ST/K00073X/1, ST/H00100X/2, ST/K000705/1, ST/K001248/1, ST/I005811/1, ST/M000761/1, PP/E003087/1, ST/J005460/1, PP/E000355/1, ST/H001093/2, ST/M001431/1, ST/K001418/1, ST/K00140X/1, ST/M001474/1, ST/H001093/1, ST/I003525/1, ST/M001512/1, PP/E003699/2, ST/H001026/2, PP/E003699/1, ST/J005576/1
Science and Technology Facilities Council
Leverhulme Trust
Royal Society
European Commission
Australian Research Council
Minerva Foundation
Deutsche Forschungsgemeinschaft
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Danmarks Grundforskningsfond
German-Israeli Foundation for Scientific Research and Development
Canada Foundation for Innovation
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
National Science Council
Fundação para a Ciência e a Tecnologia
Bundesministerium für Bildung und Forschung
Agencia Nacional de Investigación y Desarrollo
Agencia Nacional de Promoción Científica y Tecnológica
Ministerstvo Zdravotnictví Ceské Republiky
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Foundation for Fundamental Research on Matter
General Secretariat for Research and Technology
Lundbeckfonden
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science and Technology
Joint Institute for Nuclear Research
Israel Science Foundation
Instituto Nazionale di Fisica Nucleare
Max-Planck-Gesellschaft
Javna Agencija za Raziskovalno Dejavnost RS
Ministerstwo Nauki i Szkolnictwa Wyższego
Centre National de la Recherche Scientifique
Ministerio de Ciencia e Innovación
Centre National pour la Recherche Scientifique et Technique
Bundesministerium für Wissenschaft und Forschung
State Atomic Energy Corporation ROSATOM
Marianne and Marcus Wallenberg Foundation
Institut National de Physique Nucléaire et de Physique des Particules
Ministry of Health of the Russian Federation

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10.1016/j.physletb.2012.09.031

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@article{6d861fcd01864d84962a739367d0fae1,

title = "Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector",

abstract = "We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb−1 of pp collision data at s=7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σt=83±4(stat.)−19 +20(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb|≫|Vts|,|Vtd|, the coupling strength at the W-t-b vertex is determined to be |Vtb|=1.13−0.13 +0.14. If it is assumed that |Vtb|⩽1 a lower limit of |Vtb|>0.75 is obtained at the 95% confidence level.",

author = "{ATLAS Collaboration} and G. Aad and B. Abbott and J. Abdallah and {Abdel Khalek}, S. and Abdelalim, {A. A.} and A. Abdesselam and O. Abdinov and B. Abi and M. Abolins and AbouZeid, {O. S.} and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, {B. S.} and L. Adamczyk and Adams, {D. L.} and Addy, {T. N.} and J. Adelman and M. Aderholz and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, {J. A.} and M. Aharrouche and Ahlen, {S. P.} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, {T. P.A.} and G. Akimoto and Akimov, {A. V.} and A. Akiyama and Alam, {M. S.} and Alam, {M. A.} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, {I. N.} and F. Alessandria and C. Alexa and G. Alexander and L. Barak and G. Bella and Y. Benhammou and E. Etzion and Y. Oren and A. Soffer",

note = "Publisher Copyright: {\textcopyright} 2012 CERN",

year = "2012",

month = oct,

day = "31",

doi = "10.1016/j.physletb.2012.09.031",

language = "אנגלית",

volume = "717",

pages = "330--350",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "4-5",

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TY - JOUR

T1 - Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdelalim, A. A.

AU - Abdesselam, A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - AbouZeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Aderholz, M.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Akiyama, A.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Barak, L.

AU - Bella, G.

AU - Benhammou, Y.

AU - Etzion, E.

AU - Oren, Y.

AU - Soffer, A.

PY - 2012/10/31

Y1 - 2012/10/31

N2 - We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb−1 of pp collision data at s=7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σt=83±4(stat.)−19 +20(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb|≫|Vts|,|Vtd|, the coupling strength at the W-t-b vertex is determined to be |Vtb|=1.13−0.13 +0.14. If it is assumed that |Vtb|⩽1 a lower limit of |Vtb|>0.75 is obtained at the 95% confidence level.

AB - We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb−1 of pp collision data at s=7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σt=83±4(stat.)−19 +20(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb|≫|Vts|,|Vtd|, the coupling strength at the W-t-b vertex is determined to be |Vtb|=1.13−0.13 +0.14. If it is assumed that |Vtb|⩽1 a lower limit of |Vtb|>0.75 is obtained at the 95% confidence level.

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U2 - 10.1016/j.physletb.2012.09.031

DO - 10.1016/j.physletb.2012.09.031

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AN - SCOPUS:85041779750

SN - 0370-2693

VL - 717

SP - 330

EP - 350

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 4-5

ER -

Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector

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