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Saha Theory Workshop: Cosmology at the Interface

28–30 Jan 2015
Asia/Calcutta timezone

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Session

Inflation-I

29 Jan 2015, 14:00

Conveners

Inflation-I

  • Pravabati CHIANGANGBAM

Presentation materials

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  1. 22. Inflation and Electroweak vacuum stability after LHC, PLANCK and BICEP2
    Dr Suratna Das (INSPIRE Faculty)
    29/01/2015, 14:00
    Contributory Talks
    Abstract: Recent observational developments in the fields of high energy physics and cosmology have set some new challenges in their respective fields. Observation of 125 GeV mass Higgs boson has raised the concern about the instability of electroweak vacuum around $10^{10}$ GeV whereas observations by BICEP2, if turns out to be correct, would set the inflationary scale surprisingly close to...
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  2. 30. Constraining N=1 supergravity inflationary framework with non-minimal Kähler operators
    Sayantan Choudhury (urn:Facebook)
    29/01/2015, 14:15
    Contributory Talks
    In this paper we will illustrate how to constrain unavoidable K\"ahler corrections for ${\cal N}=1$ supergravity (SUGRA) inflation from the recent Planck data. We will show that the non-renormalizable K\"ahler operators will induce in general {\it non-minimal kinetic} term for the inflaton field, and two types of SUGRA corrections in the potential - the {\it Hubble-induced mass} ($c_{H}$),...
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  3. 53. N-flation in Supergravity
    Mr Das Kumar (SINP)
    29/01/2015, 14:30
    Contributory Talks
    We have constructed a large field N-flation model in the Supergravity framework. In this simple set-up, N fields collectively drive inflation where each field traverses sub-Planckian field values. This has been realised with a generalisation of the single field chaotic inflation in Supergravity. Interestingly,despite of the presence of the field interactions, the dynamics can be described...
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  4. 17. A note on Chromo Natural Inflation
    Dr Atri Deshamukhya (Assam University, Silchar, india)
    29/01/2015, 14:45
    Contributory Talks
    In this note, we re-examine the Chromo-Natural Inflation model and its generalization in view of recent observational data. We find that the parameter space of the model admits a Non-negligible value of r as well as other cosmological observables consistent with data
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  5. 18. Cosmological bounces in spatially flat FRW spacetimes in metric f (R) gravity
    Mr Saikat CHAKRABORTY (IIT Kanpur)
    29/01/2015, 15:00
    Contributory Talks
    1)Brief introduction to cosmological bounce scenario, an alternative to the singular big-bang cosmology. 2)Brief introduction to f(R) gravity: Motivations, Action and field equation, stability issue, conformal equivalence to GR with a scalar field, Einstein frame description. 3)Analysing cosmological bounce in the framework of f(R) gravity: General bouncing condition for FRW metric with...
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