Baryon asymmetry in a heavy moduli scenario

Kawasaki, Masahiro; Nakayama, Kazunori

doi:10.1103/physrevd.76.043502

Cited by 22 publications

(25 citation statements)

References 116 publications

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“…Examples of a flat direction lifted at dimension-8 and invariant under the Standard Model and U(1) ′ gauge groups include: φ 4 FD = N LLĒ and NŪDD, where we impose R-parity to forbid a lifting term of dimension-4. A detailed account of Affleck-Dine leptogenesis (baryogenesis) and moduli decay can be found in [27]. Other, highly efficient, non-standard leptogenesis mechanisms (such as resonant leptogenesis [28]) are also possible, but less generic.…”

Section: Moduli Cosmologymentioning

confidence: 99%

“…In addition to ensuring dark matter stability, the Z 2 symmetry excludes an HΦ † term, which would give Φ a tadpole when H gets a VEV. With the convention in (27), perturbativity requires that k 1 , k 2 < 0.8 and k 3 < 3.1. There are additional constraints to avoid hitting a Landau pole below the GUT scale, but this is highly dependent on what other fields couple to H and Φ (for example, the quartic terms could have large contributions from integrating out other weak scale particles) so we do not consider this as a constraint.…”

Section: Field Content and Interactionsmentioning

confidence: 99%

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Emergent dark matter, baryon, and lepton numbers

Cui¹,

Randall²,

Shuve³

2011

J. High Energ. Phys.

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We present a new mechanism for transferring a pre-existing lepton or baryon asymmetry to a dark matter asymmetry that relies on mass mixing which is dynamically induced in the early universe. Such mixing can succeed with only generic scales and operators and can give rise to distinctive relationships between the asymmetries in the two sectors. The mixing eliminates the need for the type of additional higherdimensional operators that are inherent to many current asymmetric dark matter models. We consider several implementations of this idea. In one model, mass mixing is temporarily induced during a two-stage electroweak phase transition in a two Higgs doublet model. In the other class of models, mass mixing is induced by large field vacuum expectation values at high temperatures -either moduli fields or even more generic kinetic terms. Mass mixing models of this type can readily accommodate asymmetric dark matter masses ranging from 1 GeV to 100 TeV and expand the scope of possible relationships between the dark and visible sectors in such models.

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Section: Moduli Cosmologymentioning

confidence: 99%

Section: Field Content and Interactionsmentioning

confidence: 99%

Emergent dark matter, baryon, and lepton numbers

Cui¹,

Randall²,

Shuve³

2011

J. High Energ. Phys.

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“…Moduli with masses above 20 TeV decay before Big-Bang Nucleosynthesis (BBN); however, if they are sufficiently light (typically below 10 4 TeV) they result in a very low reheat temperature, which is below a GeV. The decay of the modulus generates a large amount of entropy, which dilutes any baryon asymmetry that was created in a previous era (the dilution factor may be as large as ∼ 10 9 [10]). Generating sufficient baryon asymmetry below a GeV is a challenging task since sphaleron transitions are exponentially suppressed.…”

Section: Introductionmentioning

confidence: 99%

Affleck-Dine baryogenesis in effective supergravity

Dutta

Sinha

2010

Phys. Rev. D

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We investigate the viability of Affleck-Dine baryogenesis in D = 4, N = 1 supergravity descending from string theory. The process relies on an initial condition where visible sector supersymmetric flat directions obtain tachyonic masses during inflation. We discuss this condition for a variety of cases where supersymmetry is broken during inflation by a geometric modulus or hidden sector scalar, and outline scenarios where the initial condition is satisfied.

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“…As a consequence we have two possibilities for baryogenesis. One is to create a sufficiently large amount of baryon asymmetry before the moduli decay by, e.g., the Affleck-Dine mechanism [9,10], which has been extensively studied in a context of modular cosmology [11][12][13][14][15][16]. The other is to generate baryon asymmetry after the moduli decay.…”

Section: Jhep02(2014)062mentioning

confidence: 99%

Moduli-induced baryogenesis

Ishiwata

Jeong

Takahashi

2014

J. High Energ. Phys.

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We study a scenario for baryogenesis in modular cosmology and discuss its implications for the moduli stabilization mechanism and the supersymmetry (SUSY) breaking scale. If moduli fields dominate the Universe and decay into the standard model particles through diatonic couplings, the right amount of baryon asymmetry can be generated through CP violating decay of gluino into quark and squark followed by baryon-number violating squark decay. We find that, in the KKLT-type moduli stabilization, at least two non-perturbative terms are required to obtain a sizable CP phase, and that the successful baryogenesis is possible for the soft SUSY breaking mass heavier than O(1) TeV. A part of the parameter space for successful baryogenesis can be probed at the collider experiments, dinucleon decay search experiment, and the measurements of electric dipole moments of neutron and electron. It is also shown that similar baryogenesis works in the case of the gravitino-or the saxion-dominated Universe.

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Baryon asymmetry in a heavy moduli scenario

Cited by 22 publications

References 116 publications

Emergent dark matter, baryon, and lepton numbers

Emergent dark matter, baryon, and lepton numbers

Affleck-Dine baryogenesis in effective supergravity

Moduli-induced baryogenesis

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