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DOE OSTI · 21504991

How does gravity save or kill Q-balls?

Tamaki, Takashi·Sakai, Nobuyuki
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Abstract

We explore stability of gravitating Q-balls with potential V{sub 4}({phi})=(m{sup 2}/2){phi}{sup 2}-{lambda}{phi}{sup 4}+({phi}{sup 6}/M{sup 2}) via catastrophe theory, as an extension of our previous work on Q-balls with potential V{sub 3}({phi})=(m{sup 2}/2){phi}{sup 2}-{mu}{phi}{sup 3}+{lambda}{phi}{sup 4}. In flat spacetime Q-balls with V{sub 4} in the thick-wall limit are unstable and there is a minimum charge Q{sub min}, where Q-balls with Q<Q{sub min} are nonexistent. If we take self-gravity into account, on the other hand, there exist stable Q-balls with arbitrarily small charge, no matter how weak gravity is. That is, gravity saves Q-balls with small charge. We also show how stability of Q-balls changes as gravity becomes strong.

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDSCHARGED PARTICLESGRAVITATIONSPACE-TIMESTABILITY

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Tamaki, Takashi, Sakai, Nobuyuki. 2011-02-15. How does gravity save or kill Q-balls?. https://doi.org/10.1103/physrevd.83.044027

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