Physical results from unphysical simulations

被引:164
作者
Sharpe, S [1 ]
Shoresh, N [1 ]
机构
[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA
来源
PHYSICAL REVIEW D | 2000年 / 62卷 / 09期
关键词
D O I
10.1103/PhysRevD.62.094503
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We calculate various properties of pseudoscalar mesons in partially quenched QCD using chiral perturbation theory through next-to-leading order. Our results can be used to extrapolate to QCD from partially quenched simulations, as long as the latter use three light dynamical quarks. In other words, one can use unphysical simulations to extract physical quantities-in this case the quark masses, meson decay constants, and the Gasser-Leutwyler parameters L-4-L-8. Our proposal for determining L-7 makes explicit use of an unphysical (yet measurable) effect of partially quenched theories, namely the double-pole that appears in certain two-point correlation functions. Most of our calculations are done for sea quarks having up to three different masses, except for our result for L-7, which is derived for degenerate sea quarks.
引用
收藏
页数:14
相关论文
共 16 条
[1]  
[Anonymous], 2014, DYNAMICS STANDARD MO
[2]   PARTIALLY QUENCHED GAUGE-THEORIES AND AN APPLICATION TO STAGGERED FERMIONS [J].
BERNARD, CW ;
GOLTERMAN, MFL .
PHYSICAL REVIEW D, 1994, 49 (01) :486-494
[3]   CHIRAL PERTURBATION-THEORY FOR THE QUENCHED APPROXIMATION OF QCD [J].
BERNARD, CW ;
GOLTERMAN, MFL .
PHYSICAL REVIEW D, 1992, 46 (02) :853-857
[4]   Quenched and partially quenched chiral perturbation theory for vector and tensor mesons [J].
Chow, CK ;
Rey, SJ .
NUCLEAR PHYSICS B, 1998, 528 (1-2) :303-321
[5]  
CHOW CK, HEPPH9712528
[6]  
Cohen AG, 1999, J HIGH ENERGY PHYS
[7]   Applications of partially quenched chiral perturbation theory [J].
Golterman, M ;
Leung, KC .
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 1999, 73 :246-248
[8]   Applications of partially quenched chiral perturbation theory [J].
Golterman, MFL ;
Leung, KC .
PHYSICAL REVIEW D, 1998, 57 (09) :5703-5710
[9]   Chiral symmetry and O(alpha) improvement in lattice QCD [J].
Luscher, M ;
Sint, S ;
Sommer, R ;
Weisz, P .
NUCLEAR PHYSICS B, 1996, 478 (1-2) :365-397
[10]   CHIRAL LOGARITHMS IN QUENCHED QCD [J].
MOREL, A .
JOURNAL DE PHYSIQUE, 1987, 48 (07) :1111-1119