QCD with large number of quarks: effects of the instanton-anti-instanton pairs

被引：49
作者：
Velkovsky, M [1 ]
Shuryak, E [1 ]
机构：
[1] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA
来源：
PHYSICS LETTERS B | 1998年 / 437卷 / 3-4期
关键词：
D O I：
10.1016/S0370-2693(98)00930-7
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the contribution of instanton - anti-instanton (I (I) over bar) pairs to the vacuum energy of QCD-like theories with N-f light fermions, using the saddle point method. A qualitative change of behavior is found around N-f = 6. We discuss the relation of this phenomenon to the mechanism of chiral symmetry breaking and the asymptotic of the perturbative series associated with I (I) over bar contributions. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
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页码：398 / 402
页数：5
相关论文
共 18 条
  • [1] Appelquist T, 1996, PHYS REV LETT, V77, P1214, DOI 10.1103/PhysRevLett.77.1214
  • [2] APPELQUIST T, HEPPH9702404
  • [3] INSTANTON MOLECULAR VACUUM IN N = 1 SUPERSYMMETRIC QUANTUM-MECHANICS
    BALITSKY, II
    YUNG, AV
    [J]. NUCLEAR PHYSICS B, 1986, 274 (02) : 475 - 508
  • [4] BANKS T, 1982, NUCL PHYS B, V82, P196
  • [5] LATTICE QCD WITH 8 LIGHT-QUARK FLAVORS
    BROWN, FR
    CHEN, H
    CHRIST, NH
    DONG, ZH
    MAWHINNEY, RD
    SCHAFFER, W
    VACCARINO, A
    [J]. PHYSICAL REVIEW D, 1992, 46 (12): : 5655 - 5670
  • [6] Dependence of QCD hadron masses on the number of dynamical quarks
    Chen, D
    Mawhinney, RD
    [J]. NUCLEAR PHYSICS B, 1997, : 216 - 218
  • [7] INSTANTON CONTENT OF FINITE-TEMPERATURE QCD MATTER
    CHU, MC
    SCHRAMM, S
    [J]. PHYSICAL REVIEW D, 1995, 51 (08): : 4580 - 4586
  • [8] CHU MC, 1993, PHYS REV LETT, V70, P225
  • [9] DAMGAARD PH, HEPLAT9701008
  • [10] Instanton-anti-instanton pair induced contributions to R(e+e-->hadrons) and R(tau->hadrons)
    Faleev, SV
    Silvestrov, PG
    [J]. NUCLEAR PHYSICS B, 1996, 463 (2-3) : 489 - 510
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