Aad, G. and Abbott, B. and Abdallah, J. and Abdel, Khalek S. and Abdinov, O. and Aben, R. and Abi, B. and Abolins, M. and AbouZeid, O. S. and Abramowicz, H. and Abreu, H. and Abreu, R. and Abulaiti, Y. and Acharya, B. S. and Adamczyk, L. and Adams, D. L. and Adelman, J. and Adomeit, S. and Adye, T. and Agatonovic-Jovin, T. and Aguilar-Saavedra, J. A. and Agustoni, M. and Ahlen, S. P. and Ahmadov, F. and Aielli, G. and Akerstedt, H. and Åkesson, T. P. A. and Akimoto, G. and Akimov, A. V. and Alberghi, G. L. and Krasznahorkay, Attila and Nagai, Yoshikazu and Pásztor, Gabriella and Tóth, József (2014) Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector. PHYSICAL REVIEW D, 90 (11). ISSN 2470-0010
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Abstract
This article presents measurements of the t-channel single top-quark (t) and top-antiquark (¯t) total production cross sections σ (tq) and σ (¯tq), their ratio Rt = σ (tq)/ σ (¯tq), and a measurement of the inclusive production cross section σ (tq + ¯tq) in proton–proton collisions at √s = 7 TeV at the LHC. Differential cross sections for the tq and ¯tq processes are measured as a function of the transverse momentum and the absolute value of the rapidity of t and ¯t, respectively. The analyzed data set was recorded with the ATLAS detector and corresponds to an integrated luminosity of 4.59 fb−1. Selected events contain one charged lepton, large missing transverse momentum, and two or three jets. The cross sections are measured by performing a binned maximum-likelihood fit to the output distributions of neural networks. The resulting measurements are σ (tq) = 46 ± 1 (stat.) ± 6 (syst.) pb, σ (¯tq) = 23 ± 1 (stat.) ± 3 (syst.) pb, Rt = 2.04 ± 0.13 (stat.) ± 0.12 (syst.), and σ (tq + ¯tq) = 68 ± 2 (stat.) ± 8 (syst.) pb, consistent with the Standard Model expectation. The uncertainty on the measured cross sections is dominated by systematic uncertainties, while the uncertainty on Rt is mainly statistical. Using the ratio of σ (tq + ¯tq) to its theoretical prediction, and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb| ≫ |Vts|, |Vtd |, we determine |Vtb| = 1.02 ± 0.07.
Item Type: | Article |
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Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 11 Mar 2024 15:02 |
Last Modified: | 11 Mar 2024 15:02 |
URI: | https://real.mtak.hu/id/eprint/190036 |
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