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Title: Vector and scalar charmonium resonances with lattice QCD

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [4]
  1. Univ. of Graz, Graz (Austria)
  2. Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
  3. Univ. of Ljubljana, Ljubljana (Slovenia)
  4. Jozef Stefan Inst. (IJS), Ljubljana (Slovenia); Univ. of Ljubljana, Ljubljana (Slovenia); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

We perform an exploratory lattice QCD simulation of DD¯ scattering, aimed at determining the masses as well as the decay widths of charmonium resonances above open charm threshold. Neglecting coupling to other channels, the resulting phase shift for DD¯ scattering in p-wave yields the well-known vector resonance ψ(3770). For mπ = 156 MeV, the extracted resonance mass and the decay width agree with experiment within large statistical uncertainty. The scalar charmonium resonances present a puzzle, since only the ground state Χc0(1P) is well understood, while there is no commonly accepted candidate for its first excitation. We simulate DD¯ scattering in s-wave in order to shed light on this puzzle. The resulting phase shift supports the existence of a yet-unobserved narrow resonance with a mass slightly below 4 GeV. A scenario with this narrow resonance and a pole at Χc0(1P) agrees with the energy-dependence of our phase shift. In addition, further lattice QCD simulations and experimental efforts are needed to resolve the puzzle of the excited scalar charmonia.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CG11359; AC05-06OR23177; AC02-07CH11359; AC02-76CHO03000
OSTI ID:
1222707
Alternate ID(s):
OSTI ID: 1223213
Report Number(s):
JLAB-THY-15-2022; DOE/OR/23177-3322; arXiv:1503.05363; FERMILAB-PUB-15-084-T; PII: 2091; TRN: US1500751
Journal Information:
Journal of High Energy Physics (Online), Vol. 2015, Issue 9; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (7)

Hadron structure and spectrum from the lattice conference January 2016
Continuum limit of the D meson, D s meson, and charmonium spectrum from N f = 2 + 1 + 1 twisted mass lattice QCD journal November 2016
Hadrons and nuclei journal November 2019
Some hadronic parameters of charmonia in $$\varvec{N_{\text {f}}=2}$$ N f = 2 lattice QCD journal December 2018
Phenomenology of relativistic $$\mathbf {3}\rightarrow \mathbf {3}$$ 3 → 3 reaction amplitudes within the isobar approximation journal January 2019
Hadron Structure and Spectrum from the Lattice text January 2015
Excited and exotic charmonium, $D_s$ and $D$ meson spectra for two light quark masses from lattice QCD text January 2016

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