Observation of the Z -> psi l(+)l(-) Decay in pp Collisions at root s=13 TeV
| dc.WoS.categories | Physics, Multidisciplinary | en_US |
| dc.contributor.author | Yetkin, Elif Aslı | |
| dc.date.accessioned | 2020-06-09T09:54:16Z | |
| dc.date.available | 2020-06-09T09:54:16Z | |
| dc.date.issued | 2018-10-04 | |
| dc.department | Fakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümü | en_US |
| dc.description.abstract | This Letter presents the observation of the rare Z boson decay Z -> psi l(+)l(-). Here, psi represents contributions from direct J/psi and psi(2S) -> J/psi X, l(+)l(-) is a pair of electrons or muons, and the J/psi meson is detected via its decay to mu(+)mu(-). 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 35.9 fb(-1). The signal is observed with a significance in excess of 5 standard deviations. After subtraction of the psi(2S) -> J/psi X contribution, the ratio of the branching fraction of the exclusive decay Z -> J/psi X, l(+) l(-) to the decay Z -> mu(+)mu(-)mu(+)mu(-) within a fiducial phase space is measured to be B(Z -> J/psi X, l(+) l(-))/B(Z -> mu(+)mu(-)mu(+)mu(-)) = 0.67 +/- 0.18(stat) +/- 0.05(syst). | en_US |
| dc.fullTextLevel | Full Text | en_US |
| dc.identifier.doi | 10.1103/PhysRevLett.121.141801 | |
| dc.identifier.issn | 1079-7114 | |
| dc.identifier.issn | 0031-9007 | |
| dc.identifier.pmid | 30339440 | en_US |
| dc.identifier.scopus | 2-s2.0-85054666594 | en_US |
| dc.identifier.uri | https://hdl.handle.net/11411/2186 | |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevLett.121.141801 | |
| dc.identifier.wos | WOS:000446406900001 | en_US |
| dc.identifier.wosquality | Q1 | en_US |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.indekslendigikaynak | Scopus | en_US |
| dc.indekslendigikaynak | PubMed | en_US |
| dc.issue | 14 | en_US |
| dc.language.iso | en | en_US |
| dc.national | International | en_US |
| dc.numberofauthors | 500+ | en_US |
| dc.publisher | AMER PHYSICAL SOC | en_US |
| dc.relation.ec | Yes | en_US |
| dc.relation.ispartof | PHYSICAL REVIEW LETTERS | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.subject | QUARKONIUM | en_US |
| dc.subject | FRAGMENTATION | en_US |
| dc.title | Observation of the Z -> psi l(+)l(-) Decay in pp Collisions at root s=13 TeV | |
| dc.type | Article | |
| dc.volume | 121 | en_US |
