Observation of a Neutral Structure Near the DD̅* Mass Threshold in e⁺e⁻ → (DD̅*)⁰π⁰ at √s= 4.226 and 4.257 GeV
dc.contributor.ORCID | 0000-0003-0867-2189 (Lou, X.) | en_US |
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 | Albrecht, M. | en_US |
dc.contributor.author | Ambrose, D. J. | en_US |
dc.contributor.author | Amoroso, A. | en_US |
dc.contributor.author | Lou, Xinchou | en_US |
dc.contributor.author | BESII Collaboration | en_US |
dc.contributor.utdAuthor | Lou, Xinchou | en_US |
dc.date.accessioned | 2016-07-01T14:45:05Z | |
dc.date.available | 2016-07-01T14:45:05Z | |
dc.date.created | 2015-11 | en_US |
dc.date.issued | 2015-11 | en_US |
dc.description | Includes supplementary material. | en_US |
dc.description.abstract | A neutral structure in the DD̅* system around the DD̅* mass threshold is observed with a statistical significance greater than 10σ in the processes e⁺e⁻ → D⁺D*π° + c.c. and e⁺e⁻ →D°D̅*⁰ + c.c. At √s = 4.226 and 4.257 GeV in the BESIII experiment. The structure is denoted as Z_c(3885)⁰. Assuming the presence of a resonance, its pole mass and width are determined to be [3885.7_{-5.7}^{+4.3} (stat) ± 8.4(syst)] MeV/c² and [35_{-12}^{+11} (stat) ± 15(syst)] MeV, respectively. The Born cross sections are measured to be σ[e⁺e⁻ → Z_c(3885)°π°, Z_c(3885)° →DD̅*] = [77 ± 13(stat) ± 17(syst)] pb at 4.226 GeV and [47 ± 9(stat) ± 10(syst)] pb at 4.257 GeV. The ratio of decay rates B[Z_c(3885)° → D⁺D*⁻ + c.c.] / 𝓑ℬ[Z_c(3885)° → D°D̅*° + c.c.] is determined to be 0.96 ± 0.18(stat) ± 0.12(syst), consistent with no isospin violation in the process, Z_c(3885)° → DD̅*. | en_US |
dc.description.sponsorship | This work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700; National Natural Science Foundation of China (NSFC) under Contracts No. 11125525, No. 11235011, No. 11322544, No. 11335008, and No. 11425524; the Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. 11179007, No. U1232201, and No. U1332201; CAS under Contracts No. KJCX2-YW-N29 and No. KJCX2-YW-N45; Ministry of Development of Turkey under Contract No. DPT2006K-120470; Russian Foundation for Basic Research under Contract No. 14-07-91152; U.S. Department of Energy under Contracts No. DE-FG02-04ER41291, No. DE-FG02-05ER41374, No. DE-SC0012069, and No. DESC0010118; and WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000-10155-0. | en_US |
dc.identifier.bibliographicCitation | Ablikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2015. "Observation of a Neutral Structure Near the DD̅* Mass Threshold in e⁺e⁻ → (DD̅*)⁰π⁰ at √s= 4.226 and 4.257 GeV." Physical Review Letters 115(22), doi:10.1103/PhysRevLett.115.222002. | en_US |
dc.identifier.issn | 0031-9007 | en_US |
dc.identifier.issue | 22 | en_US |
dc.identifier.uri | http://hdl.handle.net/10735.1/4858 | |
dc.identifier.volume | 115 | en_US |
dc.language.iso | en | en_US |
dc.publisher | Amer Physical Soc | en_US |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevLett.115.222002 | |
dc.rights | ©2015 American Physical Society | en_US |
dc.source | Physical Review Letters | |
dc.subject | Uncertainty | en_US |
dc.subject | Atomic mass | en_US |
dc.subject | Zc(3885) | en_US |
dc.subject | Isobaric spin | en_US |
dc.title | Observation of a Neutral Structure Near the DD̅* Mass Threshold in e⁺e⁻ → (DD̅*)⁰π⁰ at √s= 4.226 and 4.257 GeV | en_US |
dc.type.genre | article | en_US |
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