Observation of the Z → ψl+l- Decay in pp Collisions at √s=13 TeV
Yazarlar (1)
Prof. Dr. Hasan OĞUL Sinop Üniversitesi, Türkiye
| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Physical Review Letters (Q1) | ||
| Dergi ISSN | 0031-9007 Dergi Bilgileri (2018) | ||
| Makale Dili | İngilizce | Basım Tarihi | 10-2018 |
| Cilt / Sayı / Sayfa | 121 / 14 / 141801–0 | DOI | 10.1103/PhysRevLett.121.141801 |
| Makale Linki | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.141801 | ||
| UAK Araştırma Alanları |
Fen Bilimleri ve Matematik
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| Özet |
| This Letter presents the observation of the rare boson decay . Here, represents contributions from direct and , is a pair of electrons or muons, and the meson is detected via its decay to . The sample of proton-proton collision data, collected by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, corresponds to an integrated luminosity of . The signal is observed with a significance in excess of 5 standard deviations. After subtraction of the contribution, the ratio of the branching fraction of the exclusive decay to the decay within a fiducial phase space is measured to be B(Z→J/ψℓ+ℓ-)/B(Z→μ+μ-μ+μ-)=0.67±0.18(stat)±0.05(syst). |
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