AXINO MASS IN SUPERGRAVITY MODELS

被引:143
作者
CHUN, EJ
LUKAS, A
机构
[1] TECH UNIV MUNICH,DEPT PHYS,D-85747 GARCHING,GERMANY
[2] MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST,MUNICH,GERMANY
关键词
D O I
10.1016/0370-2693(95)00881-K
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We analyze the mass of the axino, the fermionic superpartner of the axion, in general supergravity models incorporating a Peccei-Quinn symmetry and determine the cosmological constraints on this mass. In particular, we derive a simple criterion to identify models with an LSP axino which has a mass of O(m(3/2)(2)/f(PQ)) = O(keV) and can serve as a candidate for (warm) dark matter. We point out that such models have very special properties and in addition, the small axino mass has to be protected against radiative corrections by demanding small couplings in the Peccei-Quinn sector. Generically, we find an axino mass of order m(3/2). Such masses are constrained by the requirement of an axino decay which occurs before the decoupling of the ordinary LSP. Especially, for a large Peccei-Quinn scale f(PQ) > 10(11) GeV this constraint might be difficult to fulfill.
引用
收藏
页码:43 / 50
页数:8
相关论文
共 23 条
[1]   AXION DISSIPATION THROUGH THE MIXING OF GOLDSTONE BOSONS [J].
BABU, KS ;
BARR, SM ;
SECKEL, D .
PHYSICS LETTERS B, 1994, 336 (02) :213-220
[2]   THE STRONG CP PROBLEM REVISITED [J].
CHENG, HY .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 158 (01) :1-89
[3]   NATURAL MU-TERM WITH PECCEI-QUINN SYMMETRY [J].
CHUN, EJ .
PHYSICS LETTERS B, 1995, 348 (1-2) :111-114
[4]   SUPERSYMMETRIC SINGLET MAJORONS AND COSMOLOGY [J].
CHUN, EJ ;
KIM, HB ;
LUKAS, A .
PHYSICS LETTERS B, 1994, 328 (3-4) :346-353
[5]   A SIMPLE SOLUTION TO THE STRONG CP PROBLEM WITH A HARMLESS AXION [J].
DINE, M ;
FISCHLER, W ;
SREDNICKI, M .
PHYSICS LETTERS B, 1981, 104 (03) :199-202
[6]  
DVALI G, IFUPTH2195HEPPH95052
[7]   COSMOLOGICAL GRAVITINO REGENERATION AND DECAY [J].
ELLIS, J ;
KIM, JE ;
NANOPOULOS, DV .
PHYSICS LETTERS B, 1984, 145 (3-4) :181-186
[8]   IS AXINO DARK MATTER POSSIBLE IN SUPERGRAVITY [J].
GOTO, T ;
YAMAGUCHI, M .
PHYSICS LETTERS B, 1992, 276 (1-2) :103-107
[9]   EFFECTS OF DECAY OF THE SCALAR PARTNER OF THE AXION ON COSMOLOGICAL BOUNDS ON AXION SUPERMULTIPLET PROPERTIES [J].
KIM, JE .
PHYSICAL REVIEW LETTERS, 1991, 67 (25) :3465-3468
[10]   WEAK-INTERACTION SINGLET AND STRONG CP INVARIANCE [J].
KIM, JE .
PHYSICAL REVIEW LETTERS, 1979, 43 (02) :103-107