Charm and strange quark masses and f(Ds) from overlap fermions

	Charm and strange quark masses and f(Ds) from overlap fermions
	Yang YB(杨一玻); Chen Y(陈莹); Gong M(宫明); Liu CF(刘朝峰); Yang, YB; Chen, Y; Alexandru, A; Dong, SJ; Draper, T; Gong, M
刊名	PHYSICAL REVIEW D
	2015
卷号	92 期号:3 页码:34517
通讯作者	杨一玻
英文摘要	We use overlap fermions as valence quarks to calculate meson masses in a wide quark mass range on the 2 + 1-flavor domain-wall fermion gauge configurations generated by the RBC and UKQCD Collaborations. The well-defined quark masses in the overlap fermion formalism and the clear valence quark mass dependence of meson masses observed from the calculation facilitate a direct derivation of physical current quark masses through a global fit to the lattice data, which incorporates O(a(2)) and O(m(c)(4)a(4)) corrections, chiral extrapolation, and quark mass interpolation. Using the physical masses of D-s, D-s(*) and J/psi as inputs, Sommer's scale parameter r(0) and the masses of charm quark and strange quark in the (MS) over bar scheme are determined to be r(0) = 0.465(4)(9) fm, m(c)((MS) over bar) (2 GeV) = 1.118(6)(24) GeV (or m(c)((MS) over bar) (m(c)) = 1.304(5)(20) GeV), and m(s)(MS) over bar (2 GeV) = 0.101(3)(6) GeV, respectively. Furthermore, we observe that the mass difference of the vector meson and the pseudoscalar meson with the same valence quark content is proportional to the reciprocal of the square root of the valence quark masses. The hyperfine splitting of charmonium, M-J/psi - M-eta c is determined to be 119(2)(7) MeV, which is in good agreement with the experimental value. We also predict the decay constant of D-s to be f(Ds) = 254(2)(4) MeV. The masses of charmonium P-wave states chi(c0), chi(c1) and h(c) are also in good agreement with experiments.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000362218000009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228766]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Yang YB,Chen Y,Gong M,et al. Charm and strange quark masses and f(Ds) from overlap fermions[J]. PHYSICAL REVIEW D,2015,92(3):34517.
APA	杨一玻.,陈莹.,宫明.,刘朝峰.,Yang, YB.,...&Lujan, M.(2015).Charm and strange quark masses and f(Ds) from overlap fermions.PHYSICAL REVIEW D,92(3),34517.
MLA	杨一玻,et al."Charm and strange quark masses and f(Ds) from overlap fermions".PHYSICAL REVIEW D 92.3(2015):34517.