MG15 - Talk detail |
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Participant |
SenGupta, Soumitra | |||||||
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Institution |
Indian Association for the Cultivation of Science - 2A & 2B, Raja S. C. Mullick Road - Kolkata - West Bengal - India | |||||||
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Session |
AT7 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Radion stabilization in higher curvature warped spacetime | |||||
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Abstract |
We consider a five dimensional AdS spacetime in presence of higher curvature term like F(R)=R+\alpha R^2 in the bulk. In this model, we examine the possibility of modulus stabilization from the scalar degrees of freedom of higher curvature gravity free of ghosts. Our result reveals that the model stabilizes itself and the mechanism of modulus stabilization can be argued from a geometric point of view. We determine the region of the parametric space for which the modulus (or radion) can to be stabilized. We also show how the mass and coupling parameters of radion field are modified due to higher curvature term leading to modifications of its phenomenological implications on the visible 3-brane |
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Pdf file |
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Session |
AT1 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Invisibility of antisymmetric tensor fields in the light of F(R) gravity | |||||
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Abstract |
Observable signatures of scalar, fermion and vector degrees of freedom in our universe along with spin 2 symmetric tensor field in the form of gravity arises a natural question - why our universe is free of any perceptible signature of massless antisymmetric tensor modes? This work brings out a natural explanation of this phenomena through higher curvature quantum degrees of freedom in the gravity sector which were dominant in the early universe. In the backdrop of a F(R) gravity model, we propose how the scalar degree of freedom associated with higher curvature term in the model can generate a heavily suppressed coupling between any antisymmetric massless modes and various Standard Model fields. |
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Pdf file |
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Session |
BS2 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Bouncing cosmology from warped extra dimensional scenario | |||||
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Abstract |
From the perspective of four dimensional effective theory on a two brane warped geometry model, we examine the possibility of “bouncing phenomena”on our visible brane. Our results reveal that the presence of a warped extra dimension lead to a non-singular bounce on the brane scale factor and hence can remove the “big-bang singularity”. We also examine the possible parametric regions for which this bouncing is possible. |
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Pdf file |
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