The baryogenesis window in the MSSM

被引：109

作者：

deCarlos, B ^{[1
]}

Espinosa, JR ^{[1
]}

机构：

[1] UNIV PENN, DEPT PHYS & ASTRON, PHILADELPHIA, PA 19104 USA

来源：

NUCLEAR PHYSICS B | 1997年 / 503卷 / 1-2期

关键词：

D O I：

10.1016/S0550-3213(97)00437-9

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：

Thermal two-loop QCD corrections associated with light stops have a dramatic effect on the strength of the MSSM electroweak phase transition, making it more strongly first order as required for the viability of electroweak baryogenesis. We perform a perturbative analysis of the transition strength in this model, including these important contributions, extending previous work to arbitrary values of the pseudoscalar Higgs boson mass, m(A). We find a strong enough transition in a region with 2 less than or similar to tan beta less than or similar to 4 and m(A) greater than or similar to 120 GeV, a light Higgs boson with nearly standard couplings, and mass below 85 GeV within the reach of LEP II, and one stop not much heavier than the top quark. In addition, we give a qualitative discussion of the parameter space dependence of the transition strength and comment on the possibility that the transition turns to a crossover for sufficiently large Higgs masses. (C) 1997 Published by Elsevier Science B.V.

引用

页码：24 / 54

页数：31

共 70 条

[21]

COHEN AG, 1993, ANNU REV NUCL PART S, V43, P27

[22] SPONTANEOUS CP VIOLATION AND BARYOGENESIS IN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL [J].

COMELLI, D ;

PIETRONI, M ;

RIOTTO, A .

NUCLEAR PHYSICS B, 1994, 412 (1-2) :441-458

[23] SPONTANEOUS CP VIOLATION IN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL AT FINITE-TEMPERATURE [J].

COMELLI, D ;

PIETRONI, M .

PHYSICS LETTERS B, 1993, 306 (1-2) :67-72

[24] Bosonic thermal masses in supersymmetry [J].

Comelli, D ;

Espinosa, JR .

PHYSICAL REVIEW D, 1997, 55 (10) :6253-6263

[25] Current densities in a space-time-dependent and CP-violating Higgs background in the adiabatic limit [J].

Comelli, D ;

Pietroni, M ;

Riotto, A .

PHYSICAL REVIEW D, 1996, 53 (08) :4668-4679

[26] PARTICLE CURRENTS ON A CP VIOLATING HIGGS BACKGROUND AND THE SPONTANEOUS BARYOGENESIS MECHANISM [J].

COMELLI, D ;

PIETRONI, M ;

RIOTTO, A .

PHYSICS LETTERS B, 1995, 354 (1-2) :91-98

[27]

COWAN G, 1997, ALEPH COLL CERN SEM

[28] Protecting the baryon asymmetry in theories with R-parity violation [J].

Davidson, S ;

Hempfling, R .

PHYSICS LETTERS B, 1997, 391 (3-4) :287-294

[29] Electroweak baryogenesis in the next to minimal supersymmetric model [J].

Davies, AT ;

Froggatt, CD ;

Moorhouse, RG .

PHYSICS LETTERS B, 1996, 372 (1-2) :88-94

[30] A light stop and electroweak baryogenesis [J].

Delepine, D ;

Gerard, JM ;

Felipe, RG ;

Weyers, J .

PHYSICS LETTERS B, 1996, 386 (1-4) :183-188

← 1 2 3 4 5 6 7 →