Q Ball formation in the gravity mediated SUSY breaking scenario

By S. Kasuya, M. Kawasaki. 2000

136 citations recorded by the source corpus.

We study the formation of Q balls which are made of flat directions that appear in the supersymmetric extension of the standard model in the context of gravity-mediated supersymmetry breaking. The full nonlinear calculations for the dynamics of the complex scalar field are made. Since the scalar potential in this model is flatter than ${\ensuremath{\varphi}}^{2},$ we have found that fluctuations develop and go nonlinear to form nontopological solitons, Q balls. The size of a Q ball is determined by the most amplified mode, which is completely determined by the model parameters. On the other hand, the charge of Q balls depends linearly on the initial charge density of the Affleck-Dine (AD) field. Almost all the charges are absorbed into Q balls, and only a tiny fraction of the charges is carried by a relic AD field. It may lead to some constraints on the baryogenesis and/or parameters in the particle theory. The peculiarity of gravity mediation is the moving Q balls. This results in collisions between Q balls. It may increase the charge of the Q balls, and change its fate.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/463d91264d56720a8d8030aed21f91b583c8375a

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In Astronomy and Astrophysics

1. A. Kusenko
2. Misao Sasaki
3. M. Dine
4. C. Byrnes
5. K. Abazajian
6. Z. Xing
7. Kiwoon Choi

In Nuclear and High Energy Physics

1. A. Kusenko
2. Misao Sasaki
3. M. Dine
4. Z. Xing
5. M. Drewes
6. K. Abazajian
7. C. Byrnes
8. M. Shaposhnikov

Citations in the corpus

• Origin of the matter-antimatter asymmetry (2003, methodology): “Numerical analyses (Kasuya and Kawasaki, 2000a, 2000b, 2001; Enqvist et al., 2001), which can trace the evolution of unstable modes beyond the linear regime, have shown that fragmentation of the condensate is a generic phenomenon (see Fig.”
• Analytic description of primordial black hole formation from scalar field fragmentation (2019, background): “the standard probability theory result for a collection of Niid variables with a Gaussian distribution. The field fragmentation process is stochastic, as supported by numerous simulation results (e.g. [40,64,65]). Hence, we can infer the soliton probability distribution within a given volume, P(N|V),”