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This content will become publicly available on March 17, 2017

Title: Using $$X(3823)\to J/\psi\pi^+\pi^-$$ to Identify Coupled-Channel Effects

Very recently, a new charmonium-like state X(3823) was observed by the Belle and BESIII experiments, which is a good candidate of D-wave charmonium ψ(13D2). Since the X(3872) is just below the DD¯ * threshold, the decay X(3823) → J/ψπ+π - can be a golden channel to test the significance of coupled-channel effects. In this work, this decay is considered including both the hidden-charm dipion and the usual QCDME contributions. The partial decay width, the dipion invariant mass spectrum distribution dΓ[X(3823) → J/ψπ+π - ]/dmπ +π- , and the corresponding dΓ[X(3823) → J/ψπ+π- ]/d cos θ distribution are computed. Many parameters are determined from existing experimental data, leaving the results mainly dependent on only one unknown phase between the QCDME and hidden-charm dipion amplitudes.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3]
  1. Lanzhou Univ. (China); Chinese Academy of Sciences, Lanzhou (China)
  2. Chinese Academy of Sciences, Lanzhou (China)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
OSTI Identifier:
1221329
Report Number(s):
FERMILAB-PUB--15-322-T
Journal ID: ISSN 2095-0462; arXiv eprint number arXiv:1507.07985
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Frontiers of Physics
Additional Journal Information:
Journal Volume: 11; Journal ID: ISSN 2095-0462
Publisher:
Springer
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS