Lattice study on ηc2 and X(3872)
Abstract
Properties of 2-+ charmonium ηc2 are investigated in quenched lattice QCD. The mass of ηc2 is determined to be 3.80(3) GeV, which is close to the mass of D-wave charmonium ψ(3770) and in agreement with quark model predictions. The transition width of ηc2→γJ/ψ is also obtained with a value of Γ=3.8(9)keV. Since the possible 2-+ assignment to X(3872) has not been ruled out by experiments, our results help to clarify the nature of X(3872).
- Publication:
-
Physical Review D
- Pub Date:
- January 2013
- DOI:
- 10.1103/PhysRevD.87.014501
- arXiv:
- arXiv:1206.2086
- Bibcode:
- 2013PhRvD..87a4501Y
- Keywords:
-
- 11.15.Ha;
- 12.38.Gc;
- 13.20.Gd;
- 14.40.Pq;
- Lattice gauge theory;
- Lattice QCD calculations;
- Decays of J/psi Upsilon and other quarkonia;
- High Energy Physics - Lattice;
- High Energy Physics - Experiment;
- High Energy Physics - Phenomenology
- E-Print:
- 15 pages, 8 figures. typos, grammatical errors and some references corrected, redundant discussions deleted, conclusion does not change. published version