Determination of the Spin and Parity of the Z_c (3900)

DSpace/Manakin Repository

Determination of the Spin and Parity of the Z_c (3900)

Show full item record

Title: Determination of the Spin and Parity of the Z_c (3900)
Author(s):
Ablikim, M.;
Achasov, M. N.;
Ai, X. C.;
Albayrak, O.;
Albrecht, M.;
Ambrose, D. J.;
Amoroso, A.;
Lou, Xinchou
Item Type: article
Keywords: Show Keywords
Abstract: The spin and parity of the Z_{c}(3900)^{±} state are determined to be J^{P} =1⁺ with a statistical significance larger than 7σ over other quantum numbers in a partial wave analysis of the process e⁺e⁻ → π⁺π⁻J/ψ. We use a data sample of 1.92 fb⁻¹ accumulated at √s̅=4.23 and 4.26 GeV with the BESIII experiment. When parametrizing the Z_{c}(3900)^{±} with a Flatté-like formula, we determine its pole mass M_{pole} = (3881.2 ± 4.2_{stat} ± 52.7_{syst}) MeV/c² and pole width Γ_{pole} = (51.8 ± 4.6_{stat} ± 36.0_{syst}) MeV. We also measure cross sections for the process e⁺e⁻→ Z_{c}(3900)^{±}π⁻ + c.c.→ J/ψπ⁺π⁻ and determine an upper limit at the 90% confidence level for the process e⁺e⁻→ Z_{c}(4020)^{±}π⁻ + c.c.→J/ψπ⁺π⁻
Publisher: American Physical Society
ISSN: 0031-9007
Source: Physical Review Letters
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevLett.119.072001
Persistent Link: http://hdl.handle.net/10735.1/5761
Bibliographic Citation: Ablikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2017. "Determination of the Spin and Parity of the Z_c (3900)." Physical Review Letters 119(7), doi:10.1103/PhysRevLett.119.072001
Terms of Use: ©2017 American Physical Society. All Rights Reserved.
Sponsors: This work is supported in part by the Ministry of Science and Technology of China under Contract No. 2009CB825200; Joint Funds of the National Natural Science Foundation of China under Contracts Nos. U1332201; National Natural Science Foundation of China (NSFC) under Contracts No. 11175188, No. 11375205, No. 11235011, No. 11375221, No. 11565006, and No. 10825524; German Research Foundation DFG under Collaborative Research Center Contract No. CRC-1044, 627240; Ministry of Development of Turkey under Contract No. DPT2006K-120470; U.S. Department of Energy under Contracts No. DE-SC-0012069, No. DE-SC-0010504, No. DE-SC-0010118, and No. DE-FG02-05ER41374; University of Groningen (RuG) under Contract No. 530-4CDP03, and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; and WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000-10155-0.

Files in this item

Files Size Format View
NSM-2305-7719.70.pdf 533.9Kb PDF View/Open Article

This item appears in the following Collection(s)


Show full item record