Observation of e⁺e⁻ → γX(3872) at BESIII
| dc.contributor.author | Ablikim, M. | en_US |
| dc.contributor.author | Achasov, M. N. | en_US |
| dc.contributor.author | Ai, X. C. | en_US |
| dc.contributor.author | Albayrak, O. | en_US |
| dc.contributor.author | Ambrose, D. J. | en_US |
| dc.contributor.author | An, F. F. | en_US |
| dc.contributor.author | An, Q. | en_US |
| dc.contributor.author | Lou, Xinchou | en_US |
| dc.contributor.utdAuthor | Lou, Xinchou | en_US |
| dc.date.accessioned | 2014-08-20T19:30:11Z | |
| dc.date.available | 2014-08-20T19:30:11Z | |
| dc.date.created | 2014-03-03 | en_US |
| dc.date.issued | 2014-03-03 | en_US |
| dc.description.abstract | With data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.009 to 4.420 GeV, the process e⁺e⁻ → γ X(3872) is observed for the first time with a statistical significance of 6.3σ. The measured mass of the X(3872) is (3871.9 ± 0.7(stat) ± 0.2(syst)) MeV/c², in agreement with previous measurements. Measurements of the product of the cross section σ[e⁺e⁻ → γ X(3872)] and the branching fraction ℬ [X(3872) → π⁺π⁻J/ψ] at center-of-mass energies 4.009, 4.229, 4.260, and 4.360 GeV are reported. Our measurements are consistent with expectations for the radiative transition process Y(4260) → γ X(3872). | en_US |
| dc.identifier.bibliographicCitation | Ablikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2014. "Observation of e⁺e⁻ → γX(3872) at BESIII." Physical Review Letters 112(9), doi:10.1103/PhysRevLett.112.092001 | en_US |
| dc.identifier.issn | 0031-9007 | en_US |
| dc.identifier.issue | 9 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10735.1/3909 | |
| dc.identifier.volume | 112 | en_US |
| dc.language.iso | en | en_US |
| dc.relation.uri | http://dx.doi.org/10.1103/PhysRevLett.112.092001 | |
| dc.rights | ©2014 American Physical Society | en_US |
| dc.source | Physical Review Letters | |
| dc.subject | Gigaelectronvolts (GeV) | en_US |
| dc.subject | Branching fractions (Nuclear physics) | en_US |
| dc.title | Observation of e⁺e⁻ → γX(3872) at BESIII | en_US |
| dc.type.genre | Article | en_US |