Nonthermal production of dark matter from a late-decaying scalar field at an intermediate scale

Endo, Motoi; Takahashi, Fuminobu

doi:10.1103/physrevd.74.063502

Cited by 44 publications

(22 citation statements)

References 51 publications

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“…In this case we have also varied the other relevant parameters (M N 1 , α) in the range given in Eq. (31). From this figure it is seen that the allowed values of g BL increases with M Z BL .…”

Section: Relic Density Of Sterile Neutrino Dark Matter (N 1 )mentioning

confidence: 75%

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Addendum: Freeze-in production of sterile neutrino dark matter in U(1)_B–L model

Biswas

Gupta

2017

J. Cosmol. Astropart. Phys.

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With the advent of new and more sensitive direct detection experiments, scope for a thermal WIMP explanation of dark matter (DM) has become extremely constricted. The non-observation of thermal WIMP in these experiments has put a strong upper bound on WIMP-nucleon scattering cross section and within a few years it is likely to overlap with the coherent neutrino-nucleon cross section. Hence in all probability, DM may have some non-thermal origin. In this work we explore in detail this possibility of a non-thermal sterile neutrino DM within the framework of U(1) B−L model. The U(1) B−L model on the other hand is a well-motivated and minimal way of extending the standard model so that it can explain the neutrino masses via Type-I see-saw mechanism. We have shown, besides explaining the neutrino mass, it can also accommodate a non-thermal sterile neutrino DM with correct relic density. In contrast with the existing literature, we have found that W ± decay can also be a dominant production mode of the sterile neutrino DM. To obtain the comoving number density of dark matter, we have solved here a coupled set of Boltzmann equations considering all possible decay as well as annihilation production modes of the sterile neutrino dark matter. The framework developed here though has been done for a U(1) B−L model, can be applied quite generally for any models with an extra neutral gauge boson and a fermionic non-thermal dark matter.

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Section: Relic Density Of Sterile Neutrino Dark Matter (N 1 )mentioning

confidence: 75%

“…Production of the non-thermal DM candidate usually occurs via a decay of a heavy mother particle (e.g. from Inflaton decay and decay of heavy Moduli fields [31,32]).…”

Section: Introductionmentioning

confidence: 99%

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)_B–L model

Biswas

Gupta

2017

J. Cosmol. Astropart. Phys.

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“…Therefore, the nonthermal abundance generically dominates over the thermal one. Scenarios of non-thermal Dark Matter which fit within this framework have been explored in [23,36].…”

Section: Jhep05(2009)083mentioning

confidence: 99%

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Kumar¹

2009

J. High Energy Phys.

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Neutrino masses, Baryon asymmetry, dark matter and the moduli problem -A complete framework E-mail: kpiyush@berkeley.eduAbstract: Recent developments in string theory have led to "realistic" string compactifications which lead to moduli stabilization while generating a hierarchy between the Electroweak and Planck scales at the same time. However, this seems to suggest a rethink of our standard notions of cosmological evolution after the end of inflation and before the beginning of BBN. This epoch is crucial for addressing the issues of neutrino masses, baryon asymmetry, Dark Matter (DM) abundance and the moduli (gravitino) problem. We argue that within classes of realistic string compactifications as defined above, there generically exists a light modulus with a mass comparable to that of the gravitino which is typically much smaller than the Hubble parameter during inflation. Therefore, it is destabilized and generates a large late-time entropy when it decays. Thus, all known elegant mechanisms of generating the baryon asymmetry of the Universe in the literature have to take this fact into account.In this work, we find that it is still possible to naturally generate the observed baryon asymmetry of the Universe as well as light left-handed neutrino masses from a period of Affleck-Dine (AD) leptogenesis shortly after the end of inflation, in classes of realistic string constructions with a minimal extension of the MSSM below the unification scale (consisting only of right-handed neutrinos) and satisfying certain microscopic criteria described in the text. The AD mechanism has already been used to generate the baryon asymmetry in the literature; however in this work we have embedded the above mechanism within a framework well motivated from string theory and have tried to describe the epoch from the end of inflation to the beginning of BBN in a complete and self-consistent manner. The consequences of our analysis are as follows. The lightest left-handed neutrino is required to be virtually massless. The moduli (gravitino) problem can be naturally solved in this framework both within gravity and gauge mediation. The observed upper bound on the relic abundance constrains the moduli-matter and moduli-gravitino couplings since the DM is produced non-thermally within this framework. Finally, although not a definite prediction, the framework naturally allows a light right-handed neutrino and sneutrinos around the electroweak scale which could have important implications for the nature of DM as well as the LHC.

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“…As clearly shown in ref. [37], however, it is not helicity-suppressed and its rate is generically comparable to that into gauge bosons. Taking into account this fact, we will show that the saxion-induced baryogenesis is more efficient than originally considered before.…”

Section: Jhep02(2014)062mentioning

confidence: 99%

“…(4.24), which is already pointed out by ref. [37]. Since |κ| is order unity, the saxion can dominantly decay into a gluino pair.…”

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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Nonthermal production of dark matter from a late-decaying scalar field at an intermediate scale

Cited by 44 publications

References 51 publications

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)_B–L model

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)_B–L model

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Moduli-induced baryogenesis

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Nonthermal production of dark matter from a late-decaying scalar field at an intermediate scale

Cited by 44 publications

References 51 publications

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)B–L model

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)B–L model

Neutrino masses, Baryon asymmetry, dark matter and the moduli problem — A complete framework

Moduli-induced baryogenesis

Contact Info

Product

Resources

About

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)_B–L model

Addendum: Freeze-in production of sterile neutrino dark matter in U(1)_B–L model