1. What are universal features of gravitating Q-balls? Takashi Tamaki(Nihon University) withNobuyuki Sakai (Yamagata University) • Introduction Q-balls:a kind of nontopological solitonsconsist of scalar fields Self-gravity may not be important? Kaup, PR172, 1331 (1968) flat × with self-gravity ○　(mini-boson star)

2. gravity-mediation type in the Affleck-Dine (AD) mechanism ○ ○ flat gravity ○ ``Q-balls” surrounded by Q-matter × TT, N. Sakai, PRD83, 084046 (2011) Here, gauge-mediation type seek for universal features!! TT, N. Sakai, PRD84, 044054 (2011)

3. II. Model normalization

4. III. flat case Particle motion in trivial

5. Thick-wall solution Thin-wall solution

6. IV. gravitating case Particle motion in Signature of depends on r.  depends on ``time”.

7. Thick-wall Thin-wall

8. Thick-wall Thin-wall changes ``quickly”. For various ?

9. strong gravity WHY ??? weak gravity

10. V. thick-wall case take up to first order in h,f. weak gravity Let us evaluate Evaluate from We used Maclaurin expansion and neglected For For We should compare with

11. and weak gravity We assume for C=const. and approximating substitute into

12. as in the flat case

13. V. conclusion Gravitating Q-balls The thick-wall limit is completely different from the flat case. exists !! From the analytic estimation, our results hold for general potentials if a positive mass term is a leading order.

14. as in the flat case

15. important quantities Total energy (Hamiltonian) Basic equations

17. サイズの議論 mini-BS 1/mの半径GM~1/m  BS の相互作用項の存在が本質的  e.g., Λ大 GM~1/m_re m(neutron) 程度 M=M(太陽)