https://doi.org/10.1140/epjc/s10052-024-13365-6
Regular Article - Theoretical Physics
Tachyonic effects on Kähler moduli stabilized inflaton potential in type-IIB/F theory
Department of Physics, The University of Burdwan, 713104, Burdwan, West Bengal, India
Received:
11
July
2024
Accepted:
11
September
2024
Published online:
7
October
2024
We investigate the effects of inclusion of charged tachyonic open-string scalars in the perturbative and the non-perturbative Kähler moduli stabilizations in a geometry of three intersecting magnetized D7-brane stacks in type-IIB/F theory and also study the overall influence of this process on the inflaton potential, in a hybrid inflation scenario. We find that a tachyon lowers the minimum of the inflaton potential and assists to end the inflation. For simplicity, we have included one tachyon at a time in the present work and observe that this procedure preserves the features of slow-roll plateau of the potential. An interesting observation here is that the tachyonic part of the potential can be fine-tuned to get an almost zero minimum of the potential, thereby conforming to the small experimental value of the cosmological constant.
© The Author(s) 2024
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