Resonances within nonperturbative methods in field theories

Marques, G. C.; Ventura, Ivan

doi:10.1103/physrevd.14.1056

Cited by 20 publications

(29 citation statements)

References 4 publications

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“…Finally, the Q-ball when the gravity mediation dominates is not discussed in this paper, which is called new type Q-ball [42]. From the mathematical point of view, new type Q-ball is equivalent to the Q-ball proposed and examined in [43,44]. New type Q-ball is stable against decay into nucleon due to the smallness of gravitino mass, and it has different properties from gauge mediation type Q-ball, including its mass, size, and typical charge etc.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Charged Q-ball dark matter fromBandLdirection

Hong

Kawasaki

Yamada

2016

J. Cosmol. Astropart. Phys.

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We consider nearly equal number of gauge mediation type charged (anti-) Q-balls with charge of α −1 137 well before the BBN epoch and discussed how they evolve in time. We found that ion-like objects with electric charges of +O(1) are likely to become relics in the present universe, which we expect to be the dark matter. These are constrained by MICA experiment, where the trail of heavy atom-like or ion-like object in 10 9 years old ancient mica crystals is not observed. We found that the allowed region for gauge mediation model parameter and reheating temperature have to be smaller than the case of the neutral Q-ball dark matter.

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Section: Conclusion and Discussionmentioning

confidence: 99%

Charged Q-ball dark matter fromBandLdirection

Hong

Kawasaki

Yamada

2016

J. Cosmol. Astropart. Phys.

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“…The piecewise potential (104) was introduced in a more general form in [1], the corresponding nongauged Q-balls in such a model were thoroughly examined in [26] (see also [31] for a model with similar scalar field potential). Potential (105) was introduced in [32]; the corresponding nongauged Qballs in this model were thoroughly examined in [23]. An interesting feature of the nongauged theory with potential (105) is that not only can the Q-ball solutions be obtained analytically in this model, but also the analysis of perturbations above the Q-ball can be made fully analytically [23], providing an explicit demonstration of the validity of the classical stability criterion dQ dω < 0 in this model.…”

Section: Numerical Simulationsmentioning

confidence: 99%

“…However, the explicit analyses of instabilities in different models, which were carried out in [22,23,26], show that at least in the models discussed in these papers there do exist unstable modes for dQ dω > 0.…”

Section: One-field Q-ballsmentioning

confidence: 99%

Problem with classical stability of U(1) gauged Q-balls

Panin

Smolyakov

2017

Phys. Rev. D

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In this paper, we present a detailed study of the problem of classical stability of U(1) gauged Q-balls. In particular, we show that the standard methods that are suitable for establishing the classical stability criterion for ordinary (nongauged) one-field and two-field Q-balls are not effective in the case of U(1) gauged Q-balls, although all the technical steps of calculations can be performed in the same way as those for ordinary Q-balls. We also present the results of numerical simulations in models with different scalar field potentials, explicitly demonstrating that, in general, the regions of stability of U(1) gauged Q-balls are not defined in the same way as in the case of ordinary Q-balls. Consequently, the classical stability criterion for ordinary Q-balls cannot be applied to U(1) gauged Q-balls in the general case.

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“…An interesting feature of this model is that the linearized equations of motion for perturbations can be solved exactly in the nongauged case [12]. The see from Figure 9 that there are classically unstable U(1) gauged Q-balls with dQ dω < 0 (for example, the Q-ball marked by the dot in Figure 9).…”

Section: Classical Stability Of U(1) Gauged Q-balls: Numerical Simulamentioning

confidence: 98%