Please use this identifier to cite or link to this item: https://hdl.handle.net/1783.1/97522
Combinations of single-top-quark production cross-section measurements and \fLVVtb\ determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments
| Author |
The ATLAS Collaboration
The CMS Collaboration Lie, Ki 
Ng, T. Y. Prokofiev, Kirill
|
|---|---|
| Issue Date | 2019 |
| Source | Journal of High Energy Physics, v. 2019, (5), May 2019, article number 88 |
| Abstract | This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at √s = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb(−1) at √s = 7 TeV and 12.2 to 20.3 fb(−1) at √s = 8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5 ± 5.7 pb and 87.7 ± 5.8 pb at √s = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at √s = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at √s = 8 TeV. The square of the magnitude of the CKM matrix element Vtb multiplied by a form factor fLV is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation \Vtd\, \Vts\ ≪ \Vtb\. All the \fLVVtb\(2) determinations, extracted from individual ratios at √s = 7 and 8 TeV, are combined, resulting in \fLVVtb\ = 1.02 ± 0.04 (meas.) ± 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions. |
| Subject | |
| DOI | 10.1007/JHEP05(2019)088 |
| ISSN | 1126-6708 |
| Language | English |
| Type | Article |
| RGC funded | Yes |
| Access |
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