On the solution to the polonyi problem with O(10 TeV) gravitino mass in supergravity

Moroi, Takeo; Yamaguchi, Masahiro; Yanagida, Tsutomu T.

doi:10.1016/0370-2693(94)01337-c

Cited by 117 publications

(182 citation statements)

References 24 publications

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“…For nonrelativistic velocities v/c ≪ 1, we have V ∝ 1/n ∝ m/ρ and E ∝ m v 2 /2 ∝ m/x. In fact, since the microcanonical description is more fundamental, definition (14), evaluated at the freeze out, is consistent with (3) and (13), and so it is also valid immediately after the freeze out era (once particle numbers are conserved). Since (14) is valid at both the initial and final states, respectively corresponding to the freeze out (s f , x f , n f ) and to the values associated with a suitable halo structure (s (h) , x (h) , n (h) ), the change in entropy per particle that follows from (14) between these two states is given by…”

Section: The Microcanonical Entropymentioning

confidence: 65%

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Using entropy to discriminate annihilation channels in neutralinos making up galactic halos

2004

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Applying the microcanonical definition of entropy to a weakly interacting and self-gravitating neutralino gas, we evaluate the change in the local entropy per particle of this gas between the freeze out era and present day virialized halo structures. An "entropy consistency" criterion emerges by comparing theoretical and empirical estimates of this entropy. We apply this criterion to the cases when neutralinos are mostly B-inos and mostly Higgsinos, in conjunction with the usual "abundance" criterion requiring that present neutralino relic density complies with 0.2 < Ωχ1 0 < 0.4 for h ≃ 0.65. The joint application of both criteria reveals that a much better fitting occurs for the B-ino than for the Higgsino channels, so that the former seems to be a favored channel along the mass range of 155 GeV < mχ1 0 < 230 GeV. These results are consistent with neutralino annihilation patterns that emerge from recent theoretical analysis on cosmic ray positron excess data reported by the HEAT collaboration. The suggested methodology can be applied to test other annihilation channels of the neutralino, as well as other particle candidates of thermal WIMP gas relics.

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Section: The Microcanonical Entropymentioning

confidence: 65%

“…If the neutralino is Higgsino-like, annihilating into W-boson pairs, then the cross section is s-wave dominated and can be approximated by (6) with [3,13,14] …”

Section: The Neutralino Gasmentioning

confidence: 99%

Using entropy to discriminate annihilation channels in neutralinos making up galactic halos

2004

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“…It is possible to generate the baryon asymmetry through Affleck-Dine baryogenesis [20][21][22] so as to compensate for dilution. Masses m φ above 10 2 TeV may be considered "safe" in this sense.…”

Section: The Moduli Problemmentioning

confidence: 99%

Moduli dark matter and the search for its decay line using Suzaku x-ray telescope

2013

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“…Although a large entropy is produced by the moduli decay, the present observed baryon asymmetry can be naturally explained by the Affleck-Dine mechanism [15] as shown in Ref. [16]. However, such heavy moduli masses (i.e., a heavy gravitino mass) could be only achieved by some specific models.…”

Section: Introductionmentioning

confidence: 69%

Cosmological moduli problem and thermal inflation models

1999

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In superstring theories, there exist various dilaton and modulus fields which masses are expected to be of the order of the gravitino mass m 3/2 . These fields lead to serious cosmological difficulties, so called "cosmological moduli problem", because a large number of moduli particles are produced as the coherent oscillations after the primordial inflation. We make a comprehensive study whether the thermal inflation can solve the cosmological moduli problem in the whole modulus mass region m φ ∼ 10 eV-10 4 GeV predicted by both hidden sector supersymmetry (SUSY) breaking and gauge-mediated SUSY breaking models. In particular, we take into account the primordial inflation model whose reheating temperature is so low that its reheating process finishes after the thermal inflation ends. We find that the above mass region m φ (≃ m 3/2 ) ∼ 10 eV-10 4 GeV survives from various cosmological constraints in the presence of the thermal inflation.

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On the solution to the polonyi problem with O(10 TeV) gravitino mass in supergravity

Cited by 117 publications

References 24 publications

Using entropy to discriminate annihilation channels in neutralinos making up galactic halos

Using entropy to discriminate annihilation channels in neutralinos making up galactic halos

Moduli dark matter and the search for its decay line using Suzaku x-ray telescope

Cosmological moduli problem and thermal inflation models

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