Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s=8 TeV
Yazarlar (1)
| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Physics Letters Section B Nuclear Elementary Particle and High Energy Physics (Q1) | ||
| Dergi ISSN | 0370-2693 Dergi Bilgileri (2014) | ||
| Makale Dili | İngilizce | Basım Tarihi | 09-2014 |
| Cilt / Sayı / Sayfa | 736 / 1 / 33–57 | DOI | 10.1016/j.physletb.2014.06.076 |
| Makale Linki | https://doi.org/10.1016/j.physletb.2014.06.076 | ||
| UAK Araştırma Alanları |
Fen Bilimleri ve Matematik
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| Özet |
| The ratio of the top-quark branching fractions R = B(t --> Wb)/B(t --> Wq), where the denominator includes the sum over all down-type quarks (q = b, s, d), is measured in the t (t) over bar dilepton final state with proton-proton collision data at root s = 8 TeV from an integrated luminosity of 19.7 fb(-1), collected with the CMS detector. In order to quantify the purity of the signal sample, the cross section is measured by fitting the observed jet multiplicity, thereby constraining the signal and background contributions. By counting the number of b jets per event, an unconstrained value of R = 1.014 +/- 0.003 (stat.) +/- 0.032 (syst.) is measured, in a good agreement with current precision measurements in electroweak and flavour sectors. A lower limit R > 0.955 at the 95% confidence level is obtained after requiring R <= 1, and a lower limit on the Cabibbo-Kobayashi-Maskawa matrix element |V-tb| > 0.975 is set at 95% confidence level. The result is combined with a previous CMS measurement of the t-channel single-top-quark cross section to determine the top-quark total decay width, Gamma(t) = 1.36 +/- 0.02 (stat.)(-0.11)(+0.14) (syst.) GeV. (C) 2014 The Authors. Published by Elsevier B.V. |
| Anahtar Kelimeler |
| CKM | CMS | Top | Width |
Science Direct
Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s=8 TeV
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 69 |
| Scopus | 71 |
| Google Scholar | 159 |
| Google Scholar | 109 |
| Google Scholar | 103 |