Observation of e⁺e⁻ → π⁰π⁰h_c and a Neutral Charmoniumlike Structure Z_c(4020)°

dc.contributor.ORCID0000-0003-0867-2189 (Lou, X.)en_US
dc.contributor.authorAblikim, M.en_US
dc.contributor.authorAchasov, M. N.en_US
dc.contributor.authorAi, X. C.en_US
dc.contributor.authorAlbayrak, O.en_US
dc.contributor.authorAlbrecht, M.en_US
dc.contributor.authorAmbrose, D. J.en_US
dc.contributor.authorAmoroso, A.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBESIII Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2016-07-01T14:37:44Z
dc.date.available2016-07-01T14:37:44Z
dc.date.created2014-11-18en_US
dc.date.issued2014-11-18en_US
dc.description.abstractUsing data collected with the BESIII detector operating at the Beijing Electron Positron Collider at center-of-mass energies of √s = 4.23, 4.26, and 4.36 GeV, we observe e⁺e⁻ → π⁰π⁰h_c for the first time. The Born cross sections are measured and found to be about half of those of e⁺e⁻ → π⁺π⁻h_c within less than 2σ In the π⁰h_c mass spectrum, a structure at 4.02 GeV/c² is found. It is most likely to be the neutral isospin partner of the Z_c(4020)^± observed in the process of e⁺e⁻ → π⁺π⁻h_c being found. A fit to the π°h_c invariant mass spectrum, with the width of the Z_c(4020)° fixed to that of its charged isospin partner and possible interferences with non- Z_c(4020)° amplitudes neglected, gives a mass of (4023.9 ± 2.2 ± 3.8) MeV/c² for the Z_c(4020)°, where the first error is statistical and the second systematic.en_US
dc.description.sponsorshipThis work is supported in part by National Key Basic Research Program of China under Contract No. 2015CB856700; Joint Funds of the National Natural Science Foundation of China under Contracts No. 11079008, No. 11179007, No. U1232201, No. U1332201; National Natural Science Foundation of China (NSFC) under Contracts No. 10935007, No. 11121092, No. 11125525, No. 11235011, No. 11079023, No. 11322544, No. 11335008; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS under Contracts No. KJCX2-YW-N29, No. KJCX2-YW-N45; 100 Talents Program of CAS; German Research Foundation DFG under Contract No. Collaborative Research Center CRC-1044; Istituto Nazionale di Fisica Nucleare, Italy; 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. DEFG02- 04ER41291, No. DE-FG02-05ER41374, No. DEFG02- 94ER40823, No. DESC0010118; U.S. National Science Foundation; University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000- 10155-0.en_US
dc.identifier.bibliographicCitationAblikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2014. "Observation of e⁺e⁻ → π⁰π⁰h_c and a Neutral Charmoniumlike Structure Z_c(4020)°." Physical Review Letters 113(21), doi:10.1103/PhysRevLett.113.212002.en_US
dc.identifier.issn0031-9007en_US
dc.identifier.issue21en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4856
dc.identifier.volume113en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.113.212002
dc.rights©2014 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectMass spectrometryen_US
dc.subjectIsobaric spinen_US
dc.subjectMass spectrometersen_US
dc.subjectZc(4020)en_US
dc.subjectCharmoniumen_US
dc.titleObservation of e⁺e⁻ → π⁰π⁰h_c and a Neutral Charmoniumlike Structure Z_c(4020)°en_US
dc.type.genrearticleen_US

Files

Original bundle

Now showing 1 - 2 of 2
Loading...
Thumbnail Image
Name:
NSM-2305-274184.55.pdf
Size:
663.94 KB
Format:
Adobe Portable Document Format
Description:
Article
Loading...
Thumbnail Image
Name:
NSM-2305-274184.55Title.png
Size:
57.11 KB
Format:
Portable Network Graphics
Description:
Title

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
American Physical Society.pdf
Size:
61.15 KB
Format:
Adobe Portable Document Format
Description:

Collections