TY - JOUR
T1 - Q-ball instability due to U(1) breaking
AU - Kawasaki, Masahiro
AU - Konya, Kenichiro
AU - Takahashi, Fuminobu
N1 - Funding Information:
F.T. would like to thank the Japan Society for Promotion of Science for financial support.
PY - 2005/7/21
Y1 - 2005/7/21
N2 - Q-ball is a nontopological soliton whose stability is ensured by global U(1) symmetry. We study a Q-ball which arises in the Affleck-Dine mechanism for baryogenesis and consider its possible instability due to U(1) breaking term (A-term) indispensable for successful baryogenesis. It is found that the instability destroys the Q-ball if its growth rate exceeds inverse of the typical relaxation time scale of the Q-ball. However, the instability is not so strong as it obstructs the cosmological formation of the Q-balls.
AB - Q-ball is a nontopological soliton whose stability is ensured by global U(1) symmetry. We study a Q-ball which arises in the Affleck-Dine mechanism for baryogenesis and consider its possible instability due to U(1) breaking term (A-term) indispensable for successful baryogenesis. It is found that the instability destroys the Q-ball if its growth rate exceeds inverse of the typical relaxation time scale of the Q-ball. However, the instability is not so strong as it obstructs the cosmological formation of the Q-balls.
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U2 - 10.1016/j.physletb.2005.05.082
DO - 10.1016/j.physletb.2005.05.082
M3 - Article
AN - SCOPUS:21544469465
SN - 0370-2693
VL - 619
SP - 233
EP - 239
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -