dc.contributor.author | Özel Güven, Özden | |
dc.contributor.author | Bayraktar, Meral | |
dc.contributor.author | Coles, Simon J. | |
dc.contributor.author | Hökelek, Tuncer | |
dc.date.accessioned | 2019-12-13T06:31:52Z | |
dc.date.available | 2019-12-13T06:31:52Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0031-9007 | |
dc.identifier.uri | https://doi.org/10.1103/PhysRevLett.121.141801 | |
dc.identifier.uri | http://hdl.handle.net/11655/18438 | |
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). | |
dc.language.iso | en | |
dc.publisher | Amer Physical Soc | |
dc.relation.isversionof | 10.1103/PhysRevLett.121.141801 | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | Physics | |
dc.title | Observation Of The Z -> Psi L(+)L(-) Decay In Pp Collisions At Root S=13 Tev | |
dc.type | info:eu-repo/semantics/article | |
dc.relation.journal | Physical Review Letters | |
dc.contributor.department | Fizik Mühendisliği | |
dc.identifier.volume | 121 | |
dc.identifier.issue | 14 | |
dc.description.index | WoS | |
dc.description.index | Scopus | |