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dc.contributor.authorBESIII Collaboration
dc.contributor.authorKolcu, O. B.
dc.date.accessioned2023-01-17T07:29:08Z
dc.date.available2023-01-17T07:29:08Z
dc.date.issued2022en_US
dc.identifier.citationBESIII Collaboration. (2022). First observation of the direct production of the $\chi_ {c1} $ in $ e^+ e^-$ annihilation. arXiv preprint arXiv:2203.13782.en_US
dc.identifier.issn0031-9007
dc.identifier.urihttps://doi.org/10.1103/PhysRevLett.129.122001
dc.identifier.urihttps://hdl.handle.net/20.500.12294/3173
dc.description.abstractWe study the direct production of the J(PC) = 1(++) charmonium state chi(c1)(1P) in electron-positron annihilation by carrying out an energy scan around the mass of the chi(c1)(1P). The data were collected with the BESIII detector at the BEPCII collider. An interference pattern between the signal process e(+)e(-) -> chi(c1)(1P) -> gamma J/psi -> gamma mu(+)mu(-) and the background processes e(+)e(-) -> gamma(ISR) J/psi -> gamma(ISR)mu(+)mu(-) and e(+)e(-) -> gamma(ISR)mu(+)mu(-) is observed by combining all the data samples. The chi(c1)(1P) signal is observed with a significance of 5.1 sigma. This is the first observation of a C-even state directly produced in e(+)e(-) annihilation. The electronic width of the chi(c1)(1P) resonance is determined to be Gamma(ee) = (0.12(-0.08)(+0.13)) eV, which is of the same order of magnitude as theoretical calculations.en_US
dc.language.isoengen_US
dc.publisherAMER PHYSICAL SOCen_US
dc.relation.ispartofPHYSICAL REVIEW LETTERSen_US
dc.identifier.doi10.1103/PhysRevLett.129.122001en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectX(3872)en_US
dc.subjectMESONSen_US
dc.subjectSEARCHen_US
dc.subjectSTATESen_US
dc.titleFirst Observation of the Direct Production of the chi(c1) in e(+)e(-) Annihilationen_US
dc.typearticleen_US
dc.departmentMühendislik ve Mimarlık Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.authorid0000-0002-9177-1286en_US
dc.identifier.volume129en_US
dc.identifier.issue12en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.institutionauthorKolcu, Onur Buğra
dc.authorwosidDWD-3692-2022en_US
dc.identifier.wosqualityQ1en_US
dc.identifier.wosWOS:000888759800005en_US


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