Cosmological consequences of MSSM flat directions

Enqvist, Kari; Mazumdar, Anupam

doi:10.1016/s0370-1573(03)00119-4

Cited by 286 publications

(214 citation statements)

References 589 publications

(1,019 reference statements)

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“…In numerous models (for a review see [7]) the role of the inflaton has been performed by the Standard Model (SM) Higgs boson [8][9][10][11][12][13][14][15] or a boson in Grand Unified Theories (GUTs) [16,17] or a scalar boson in supersymmetric (SUSY) models [18][19][20] (see [21,22] as reviews). A number of advantages of simplified SUSY GUTs in comparison with nonsupersymmetric GUTs such as naturally longer period of exponential expansion and better stability of the effective Higgs potential with respect to radiative corrections due to cancelation of loop diagrams have been noted quite long ago [23].…”

Section: Introductionmentioning

confidence: 99%

MSSM-inspired multifield inflation

Dubinin

Петрова

Pozdeeva

et al. 2017

J. High Energ. Phys.

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Despite the fact that experimentally with a high degree of statistical significance only a single Standard Model-like Higgs boson is discovered at the LHC, extended Higgs sectors with multiple scalar fields not excluded by combined fits of the data are more preferable theoretically for internally consistent realistic models of particle physics. We analyze the inflationary scenarios which could be induced by the two-Higgs-doublet potential of the Minimal Supersymmetric Standard Model (MSSM) where five scalar fields have non-minimal couplings to gravity. Observables following from such MSSM-inspired multifield inflation are calculated and a number of consistent inflationary scenarios are constructed. Cosmological evolution with different initial conditions for the multifield system leads to consequences fully compatible with observational data on the spectral index and the tensor-to-scalar ratio. It is demonstrated that the strong coupling approximation is precise enough to describe such inflationary scenarios.

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Section: Introductionmentioning

confidence: 99%

MSSM-inspired multifield inflation

Dubinin

Петрова

Pozdeeva

et al. 2017

J. High Energ. Phys.

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“…However, since the flat-directions have gauge and yukawa couplings to other matter fields, one also needs to take into account the effect of renormalization (RGE) from the scale at which they are introduced (typically the compactification scale in string compactifications ∼ M GUT , M s ) to lower scales (∼ H I ). So, it could happen that RG effects could make the effective mass-squared parameter (m eff φ ) 2 negative at some scale Q c even if c 3 is positive O(1) [26]. As argued in [26], the LH u direction is most likely to develop a negative mass-squared parameter for a wide range of c 3 (both positive and negative) due to RG evolution because of the large top yukawa coupling.…”

Section: Jhep05(2009)083mentioning

confidence: 98%

“…So, it could happen that RG effects could make the effective mass-squared parameter (m eff φ ) 2 negative at some scale Q c even if c 3 is positive O(1) [26]. As argued in [26], the LH u direction is most likely to develop a negative mass-squared parameter for a wide range of c 3 (both positive and negative) due to RG evolution because of the large top yukawa coupling. The LH u direction has other advantages as well in addition to providing a mechanism for generating the B − L asymmetry and giving rise to viable neutrino masses.…”

Section: Jhep05(2009)083mentioning

confidence: 98%

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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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“…2 For the purpose of illustration, let us consider the 1 By visible sector we mean that the inflaton itself carries the SM charges, such as in the case of MSSM [38][39][40][41]. In all these examples the inflaton Φ is the D-flat direction made up of squarks and sleptons, see [57], which is lifted by the F -term of the non-renormalizable superpotential.…”

Section: Jhep04(2014)077mentioning

confidence: 99%

Constraining $ \mathcal{N} $ = 1 supergravity inflationary framework with non-minimal Kähler operators

Choudhury

Mazumdar

Pukartas

2014

J. High Energ. Phys.

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In this paper we will illustrate how to constrain unavoidable Kähler corrections for N = 1 supergravity (SUGRA) inflation from the recent Planck data. We will show that the non-renormalizable Kähler operators will induce in general non-minimal kinetic term for the inflaton field, and two types of SUGRA corrections in the potential -the Hubbleinduced mass (c H ), and the Hubble-induced A-term (a H ) correction. The entire SUGRA inflationary framework can now be constrained from (i) the speed of sound, c s , and (ii) from the upper bound on the tensor to scalar ratio, r ⋆ . We will illustrate this by considering a heavy scalar degree of freedom at a scale, M s , and a light inflationary field which is responsible for a slow-roll inflation. We will compute the corrections to the kinetic term and the potential for the light field explicitly. As an example, we will consider a visible sector inflationary model of inflation where inflation occurs at the point of inflection, which can match the density perturbations for the cosmic microwave background radiation, and also explain why the universe is filled with the Standard Model degrees of freedom. We will scan the parameter space of the non-renormalizable Kähler operators, which we find them to be order O(1), consistent with physical arguments. While the scale of heavy physics is found to be bounded by the tensor-to scalar ratio, and the speed of sound, O 10 11 ≤ M s ≤ 10 16 GeV, for 0.02 ≤ c s ≤ 1 and 10 −22 ≤ r ⋆ ≤ 0.12.

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Cosmological consequences of MSSM flat directions

Cited by 286 publications

References 589 publications

MSSM-inspired multifield inflation

MSSM-inspired multifield inflation

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

Constraining $ \mathcal{N} $ = 1 supergravity inflationary framework with non-minimal Kähler operators

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