HEAVY MESONS IN 2 DIMENSIONS

被引：21

作者：

GRINSTEIN, B ^{[1
]}

MENDE, PF ^{[1
]}

机构：

[1] BROWN UNIV, DEPT PHYS, PROVIDENCE, RI 02912 USA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.69.1018

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The large-mass limit of QCD uncovers symmetries that are not present in the QCD Lagrangian. These symmetries have been applied to physical (finite mass) systems, such as B and D mesons. We explore the validity of this approximation in the 't Hooft model (two-dimensional QCD) in the large-N approximation). We find that the large-mass approximation is good, even at the charm mass, for form factors, but it breaks down for the pseudoscalar decay constant.

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页码：1018 / 1021

页数：4

相关论文

共 27 条

[1] A LATTICE COMPUTATION OF THE DECAY CONSTANT OF THE BETA-MESON [J].

ALLTON, CR ;

SACHRAJDA, CT ;

LUBICZ, V ;

MAIANI, L ;

MARTINELLI, G .

NUCLEAR PHYSICS B, 1991, 349 (02) :598-616

[2] WEAK MIXING ANGLES FROM SEMILEPTONIC DECAYS IN THE QUARK-MODEL - COMMENT [J].

ALTOMARI, T ;

WOLFENSTEIN, L .

PHYSICAL REVIEW LETTERS, 1987, 58 (15) :1583-1583

[3]

BJORKEN JD, 1990, SLACPUB5278 REP

[4] B-MESON MASS AND DECAY CONSTANT FROM LATTICE QCD - A PRELIMINARY-STUDY [J].

BOUCAUD, P ;

PENE, O ;

HILL, VJ ;

SACHRAJDA, CT ;

MARTINELLI, G .

PHYSICS LETTERS B, 1989, 220 (1-2) :219-222

[5]

BURKHARDT M, 1991, MIT CTP2096 REP

[6] HOW LARGE IS FB FROM QCD SUM-RULES [J].

DOMINGUEZ, CA ;

PAVER, N .

PHYSICS LETTERS B, 1991, 269 (1-2) :169-174

[7] CONFINEMENT, FORM-FACTORS, AND DEEP-INELASTIC SCATTERING IN 2-DIMENSIONAL QUANTUM CHROMODYNAMICS [J].

EINHORN, MB .

PHYSICAL REVIEW D, 1976, 14 (12) :3451-3471

[8] HEAVY MESON FORM-FACTORS FROM QCD [J].

FALK, AF ;

GEORGI, H ;

GRINSTEIN, B ;

WISE, MB .

NUCLEAR PHYSICS B, 1990, 343 (01) :1-13

[9] AN EFFECTIVE FIELD-THEORY FOR HEAVY QUARKS AT LOW ENERGIES [J].

GEORGI, H .

PHYSICS LETTERS B, 1990, 240 (3-4) :447-450

[10] WEAK MIXING ANGLES FROM SEMILEPTONIC DECAYS IN THE QUARK-MODEL [J].

GRINSTEIN, B ;

WISE, MB ;

ISGUR, N .

PHYSICAL REVIEW LETTERS, 1986, 56 (04) :298-301