10.1103-PhysRevD.90.112006.pdf (1.5 MB)
Comprehensive measurements of t-channel single top-quark production cross sections at vs = 7 TeV with the ATLAS detector
journal contribution
posted on 2023-06-09, 06:01 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS CollaborationThis article presents measurements of the t-channel single top-quark (t) and top-antiquark (t¯) total production cross sections s(tq) and s(t¯q), their ratio Rt =s(tq)/s(t¯q), and a measurement of the inclusive production cross section s(tq+t¯q) in proton-proton collisions at vs=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 s(tq)=46±1(stat)±6(syst) pb, s(¯tq)=23±1(stat)±3(syst) pb, Rt=2.04±0.13(stat)±0.12( syst), and s(tq+t¯q)=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 s(tq +t¯q) 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.
Funding
ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review DISSN
2470-0010Publisher
American Physical SocietyExternal DOI
Issue
11Volume
90Page range
112006Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-05-02First Open Access (FOA) Date
2017-05-02First Compliant Deposit (FCD) Date
2017-05-02Usage metrics
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