Y(4260) on the lattice

被引：53

作者：

Chiu, Ting-Wai ^{[1
]}

Hsieh, Tung-Han

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[2] Natl United Univ, Commiss Gen Educ, Phys Sect, Miaoli 36003, Taiwan

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.73.094510

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the mass spectra of closed-charm mesons with J(PC)=1(--), for hybrid charmonium, molecules, and diquark-antidiquark operators, in quenched lattice QCD with exact chiral symmetry. For two lattice volumes 24(3)x48 and 20(3)x40, each of 100 gauge configurations generated with single-plaquette action at beta=6.1, we compute point-to-point quark propagators and measure the time-correlation functions of these exotic meson operators. For the molecular operator {((q) over bar gamma(5)gamma(i)c)((c) over bar gamma(5)q)-((c) over bar gamma(5)gamma(i)q)((q) over bar gamma(5)c)}, it detects a resonance with mass around 4238 +/- 31 MeV, which is naturally identified with Y(4260). Further, for any molecular and diquark-antidiquark operator, it detects heavier exotic charmed mesons, with (cs (c) over bar (s) over bar) around 4450 +/- 100 MeV, and (cc (c) over bar (c) over bar) around 6400 +/- 50 MeV.

引用

页数：9

共 20 条

[1]

Aubert B, 2005, PHYS REV LETT, V95, DOI [10.1103/PhysRevLett.95.042001, 10.1103/PhysRevLett.95.142001]

[2] Study of Θ+(ududs) in lattice QCD with exact chiral symmetry -: art. no. 034505 [J].