| dc.contributor.author | The BESIII collaboration | en_US |
| dc.contributor.author | Kolcu, Onur Buğra | en_US |
| dc.date.accessioned | 2019-10-29T17:49:37Z | |
| dc.date.available | 2019-10-29T17:49:37Z | |
| dc.date.issued | 2015 | |
| dc.identifier.issn | 1550-7998 | |
| dc.identifier.uri | https://dx.doi.org/10.1103/PhysRevD.92.012001 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12294/2232 | |
| dc.description.abstract | We report the first observation of the Dalitz decay ?’??e+e?, based on a data sample of 1.31 billion J/? events collected with the BESIII detector. The ?’ mesons are produced via the J/????’ decay process. The ratio ?(?’??e+e?)/?(?’???) is measured to be (2.13±0.09(stat)±0.07(sys))×10?2. This corresponds to a branching fraction B(?’??e+e?)=(4.69±0.20(stat)±0.23(sys))×10?4. The transition form factor is extracted and different expressions are compared to the measured dependence on the e+e? invariant mass. The results are consistent with the prediction of the vector meson dominance model. © 2015 American Physical Society. | en_US |
| dc.language.iso | eng | en_US |
| dc.publisher | American Physical Society | en_US |
| dc.relation.ispartof | Physical Review D - Particles, Fields, Gravitation and Cosmology | en_US |
| dc.identifier.doi | 10.1103/PhysRevD.92.012001 | en_US |
| dc.identifier.doi | 10.1103/PhysRevD.92.012001 | |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.title | Observation of the dalitz decay ?’??e+e? | en_US |
| dc.type | article | en_US |
| dc.department | İstanbul Arel Üniversitesi | en_US |
| dc.identifier.volume | 92 | en_US |
| dc.identifier.issue | 1 | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
