Goldstino decoupling in spontaneously broken supergravity theories

被引：35

作者：

Gherghetta, T

机构：

[1] Department of Physics, University of Michigan, Ann Arbor

来源：

NUCLEAR PHYSICS B | 1997年 / 485卷 / 1-2期

关键词：

gravitino; supergravity; nucleosynthesis; decoupling;

D O I：

10.1016/S0550-3213(96)00608-6

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

If the gravitino is sufficiently light and stable it will behave as an effective massless neutrino species at the time of nucleosynthesis. Depending on the temperature at which it decouples from the thermal bath in the early universe, the gravitino mass will be bounded by the primordial He-4 abundance, Assuming a conservative estimate that the number of neutrino families, N-nu < 3.6, superlight gravitinos with a mass m(3/2) less than or similar to 10(-6) eV are ruled out, This bound is weaker than previous estimates because the Goldstino annihilation cross section was overestimated.

引用

收藏

页码：25 / 37

页数：13

相关论文

共 25 条

[1] Search for supersymmetry with a light gravitino at the Fermilab Tevatron and CERN LEP colliders [J].

Ambrosanio, S ;

Kane, GL ;

Kribs, GD ;

Martin, SP ;

Mrenna, S .

PHYSICAL REVIEW D, 1996, 54 (09) :5395-5411

[2] ROLE OF CHIRAL SCALAR AND PSEUDOSCALAR IN 2-PHOTON PRODUCTION OF A SUPERLIGHT GRAVITINO [J].

BHATTACHARYA, T ;

ROY, P .

PHYSICAL REVIEW D, 1988, 38 (07) :2284-2287

[3] TREE UNITARITY IN BROKEN SUPERGRAVITY .2. DOUBLE GRAVITINO AMPLITUDE [J].

BHATTACHARYA, T ;

ROY, P .

NUCLEAR PHYSICS B, 1989, 328 (02) :481-498

[4] TREE UNITARITY IN BROKEN SUPERGRAVITY .1. SINGLE GRAVITINO AMPLITUDE [J].

BHATTACHARYA, T ;

ROY, P .

NUCLEAR PHYSICS B, 1989, 328 (02) :469-480

[5] UNITARITY LIMIT ON THE GAUGINO-GRAVITINO MASS RATIO [J].

BHATTACHARYA, T ;

ROY, P .

PHYSICS LETTERS B, 1988, 206 (04) :655-660

[6] Light gravitinos as mixed dark matter [J].

Borgani, S ;

Masiero, A ;

Yamaguchi, M .

PHYSICS LETTERS B, 1996, 386 (1-4) :189-197

[7] A GRAVITINO-GOLDSTINO HIGH-ENERGY EQUIVALENCE THEOREM [J].

CASALBUONI, R ;

DECURTIS, S ;

DOMINICI, D ;

FERUGLIO, F ;

GATTO, R .

PHYSICS LETTERS B, 1988, 215 (02) :313-316

[8] YANG-MILLS THEORIES WITH LOCAL SUPERSYMMETRY - LAGRANGIAN, TRANSFORMATION LAWS AND SUPER-HIGGS EFFECT [J].

CREMMER, E ;

FERRARA, S ;

GIRARDELLO, L ;

VANPROEYEN, A .

NUCLEAR PHYSICS B, 1983, 212 (03) :413-442

[9] RESTRICTIONS ON GRAVITINO MASS FROM CHIRAL SCALAR AND PSEUDOSCALAR PRODUCTION [J].

DICUS, DA ;

ROY, P .

PHYSICAL REVIEW D, 1990, 42 (03) :938-940

[10] A NEW SOURCE OF SINGLE PHOTONS FROM Z0 DECAY [J].

DICUS, DA ;

NANDI, S ;

WOODSIDE, J .

PHYSICS LETTERS B, 1991, 258 (1-2) :231-235