Supersymmetric dark-matter Q-balls and their interactions in matter

Kusenko, Alexander; Loveridge, Lee C.; Shaposhnikov, Mikhail

doi:10.1103/physrevd.72.025015

Cited by 57 publications

(52 citation statements)

References 33 publications

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“…[8] in connection with astrophysical limits on Q-ball dark matter. However, it was recently shown [9] that the rate of this process is considerably higher than that used in Ref. [8].…”

Section: Introductionmentioning

confidence: 77%

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Astrophysical bounds on supersymmetric dark-matter Q-balls

Kusenko¹,

Loveridge²,

Shaposhnikov³

2005

J. Cosmol. Astropart. Phys.

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Abstract.Stable baryonic Q-balls, which appear in supersymmetric extensions of the Standard Model, could form at the end of cosmological inflation from fragmentation of the Affleck -Dine condensate. We reconsider astrophysical constraints on such Q-balls as dark matter candidates. Baryonic Q-balls interact with matter by absorbing the baryon number and, effectively, leading to a rapid baryon number non-conservation. We have recently shown that this process can occur at a much faster rate than that used in previous calculations. As a consequence, stability of neutron stars imposes a stringent constraint on the types of Q-balls that can be dark matter. Only the Q-balls that correspond to baryonic flat directions lifted by baryon-number violating operators are allowed as dark-matter candidates.

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“…[8] in connection with astrophysical limits on Q-ball dark matter. However, it was recently shown [9] that the rate of this process is considerably higher than that used in Ref. [8].…”

Section: Introductionmentioning

confidence: 77%

“…In a previous paper [9] we reanalyzed the interaction of Q-balls with ordinary matter. We found that quarks falling on a Q-ball are reflected as antiquarks with a probability of order one, practically independent of the parameters of the theory.…”

Section: Interactions Of Susy Q-balls With Mattermentioning

confidence: 99%

Astrophysical bounds on supersymmetric dark-matter Q-balls

Kusenko¹,

Loveridge²,

Shaposhnikov³

2005

J. Cosmol. Astropart. Phys.

Self Cite

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“…The solitons found in the simulation might be extremely long lived, serving as dark matter candidates [74] 12 or they might decay into dark matter [75]. The inhomogeneous annihilation, if it is inefficient might lead to signatures during big bang nucleosynthesis or in the late Universe [76].…”

Section: A Additional Observational Consequencesmentioning

confidence: 99%

End of inflation, oscillons, and matter-antimatter asymmetry

Lozanov

Amin

2014

Phys. Rev. D

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The dynamics at the end of inflation can generate an asymmetry between particles and antiparticles of the inflaton field. This asymmetry can be transferred to baryons via decays, generating a baryon asymmetry in our Universe. We explore this idea in detail for a complex inflaton governed by an observationally consistent -"flatter than quadratic"-potential with a weakly broken global U (1) symmetry. We find that most of the inflaton asymmetry is locked in non-topological soliton like configurations (oscillons) produced copiously at the end of inflation. These solitons eventually decay into baryons and generate the observed matter-antimatter asymmetry for a range of model parameters. Through a combination of three dimensional lattice simulations and a detailed linearized analysis, we show how the inflaton asymmetry depends on the fragmentation, the magnitude of the symmetry breaking term and initial conditions at the end of inflation. We discuss the final decay into baryons, but leave a detailed analysis of the inhomogeneous annihilation, reheating and thermalization to future work.As part of our work, we pay particular attention to generating multifield initial conditions for the field fluctuations (including metric perturbations) at the end of inflation for lattice simulations. CONTENTS

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“…The addition of this coupling modifies the criterions of Q-Ball stability since they can now produce fermions. This fact will have an important interest for cosmology since Q-Balls can play the role of dark matter [5,6]. Particle production from the Q-Ball will reduce its charge Q and at a certain point the Q-Ball will become unstable versus decay into scalars to finally disappear.…”

Section: Introductionmentioning

confidence: 99%

Particle creation from Q-balls

Clark

2006

Nuclear Physics B

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Non topological solitons, Q-balls can arise in many particle theories with U (1) global symmetries.As was shown by Cohen et al. [2], if the corresponding scalar field couples to massless fermions, large Q-balls are unstable and evaporate, producing a fermion flux proportional to the Q-ball's surface. In this paper we analyse Q-ball instabilities as a function of Q-ball size ans fermion mass.In particular, we construct an exact quantum-mechanical description of the evaporating Q-ball.This new construction provides an alternative method to compute Q-Ball's evaporation rates. We shall also find the new expression for the upper bound on evaporation as a function of the produced fermion mass and study the effects of Q ball's size on particle production.

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Supersymmetric dark-matter Q-balls and their interactions in matter

Cited by 57 publications

References 33 publications

Astrophysical bounds on supersymmetric dark-matter Q-balls

Astrophysical bounds on supersymmetric dark-matter Q-balls

End of inflation, oscillons, and matter-antimatter asymmetry

Particle creation from Q-balls

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