Observation of the rare B0s →μ+μ- decay from the combined analysis of CMS and LHCb data
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
| Makale Türü | Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Nature | ||
| Dergi ISSN | 0028-0836 Wos Dergi Scopus Dergi | ||
| Makale Dili | İngilizce | Basım Tarihi | 06-2015 |
| Cilt / Sayı / Sayfa | 522 / 7554 / 68–72 | DOI | 10.1038/nature14474 |
| Makale Linki | http://hdl.handle.net/10261/126468 | ||
| UAK Araştırma Alanları |
Fen Bilimleri ve Matematik
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| Özet |
| The standard model of particle physics describes the fundamental particles and their interactions via the strong, electromagnetic, and weak forces. It provides precise predictions for measurable quantities that can be tested experimentally. The probabilities, or branching fractions, of the strange B meson (B0 s) and the B0 meson decaying into two oppositely charged muons (µ+ and µ−) are especially interesting because of their sensitivity to theories that extend the standard model. The standard model predicts that the B0 s→ µ+ µ− and B0→ µ+ µ− decays are very rare, with about four of the former occurring for every billion B0 s mesons produced and one of the latter occurring for every 10 billion B0 mesons 1. A difference in the observed branching fractions with respect to the predictions of the standard model would provide a direction in which the standard model should be extended. Before the Large Hadron Collider (LHC) at CERN 2 started operating, no evidence for either decay mode had been found. Upper limits on the branching fractions were an order of magnitude above the standard model predictions. The CMS (Compact Muon Solenoid) and LHCb (Large Hadron Collider beauty) collaborations have performed a joint analysis of the data from proton-proton collisions that they collected in 2011 at a centre-of-mass energy of seven teraelectronvolts and in 2012 at eight teraelectronvolts. Here we report the first observation of the B0 s→ µ+ µ− decay, with a statistical significance exceeding six standard deviations, and the best measurement so far of its branching fraction. Furthermore, we obtained evidence for the B0→ µ+ µ− decay with a … |
| Anahtar Kelimeler |
Science Direct
Observation of the rare B0s →μ+μ- decay from the combined analysis of CMS and LHCb data
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Scopus | 385 |
| Google Scholar | 436 |