**Dynamics of Qballs**

**Main focus:** **Dynamical
Evolution and Interactions of Nontopological Solitons or QBalls.**

Talk presented at the Meeting on Topological Defects at Capri 7-12 September 2000.

See also plots showing 3D scattering of Q balls leading to formation of Q loops

**Authors: **
Minos Axenides, Stavros Komineas, Leandros Perivolaropoulos
and Emmanuel Floratos.

**Abstract: **

We use numerical simulations and semi-analytical methods to investigate the
stability and the interactions of **nontopological
stationary qball solutions**. In the context of a simple model we map the

We find that the system generically performs

**Work available in print:**
PS file of the paper with figures, Source
TeX File , Figures

**Numerical Simulations of QBall Scattering
**(**charge density evolution**).

**Identical
Charge (intermediate rest frame initial velocity v=0.4)**

(Click on the figures to view the simulation. Notice the Partial Right Angle Scattering)

**Zero Initial Velocity**
(**breather-type evolution**)

**High Initial Velocity
(v=0.8)** (**forward
scattering**)

**Opposite
Charge (intermediate rest frame initial velocity v=0.4)**

**Reviews on Non-Topological Solitons and
Q Balls**:

NONTOPOLOGICAL** **SOLITONS**.**

By T.D. Lee (Columbia U.), Y. Pang (Brookhaven). CU-TP-506, (Received Nov 1991). 143pp.

Published in **Phys.Rept.221:251-350,1992**

Q** **BALLS**.**

By Sidney Coleman (Harvard U.). HUTP-85/A050, Jun 1985. 33pp.

Published in **Nucl.Phys.B262:263,1985, Erratum-ibid.B269:744,1986**

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