Zobrazeno 1 - 10
of 136
pro vyhledávání: '"George K. Leontaris"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-23 (2024)
Abstract We study the cosmological implications of an effective field theory model derived within a configuration of D7 brane stacks in the framework of type-IIB string theory. We consider a suitable geometric setup where the Kähler moduli fields ar
Externí odkaz:
https://doaj.org/article/3969da4d470f4a8a8fb30c8565e33bbc
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-25 (2024)
Abstract We study supersymmetric (SUSY) flipped SU(5) × U(1) unification, focussing on its predictions for proton decay, fermion masses and gravitational waves. We performed a two-loop renormalisation group analysis and showed that the SUSY flipped
Externí odkaz:
https://doaj.org/article/06571f7afbbe45b789cf8972bd7bba8e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 11, Pp 1-23 (2022)
Abstract We investigate the low energy properties of an effective local model with flipped $$SU(5)\times U(1)_{\chi }$$ S U ( 5 ) × U ( 1 ) χ gauge group, constructed within the framework of F-theory. Its origin is traced back to the SO(10) symmetr
Externí odkaz:
https://doaj.org/article/9055c6c93098454e8bf6915650750181
Autor:
George K. Leontaris, Pramod Shukla
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 7, Pp 1-32 (2022)
Abstract In this work we investigate the moduli stabilisation problem and the requirements for de Sitter vacua within the framework of type IIB string theory. Using perturbative effects arising from the various sources such as α′ corrections, loga
Externí odkaz:
https://doaj.org/article/87969637e1f8482b99d090aee3cc2b4a
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 1, Pp 1-46 (2022)
Abstract We present an explicit string realisation of a cosmological inflationary scenario we proposed recently within the framework of type IIB flux compactifications in the presence of three magnetised D7-brane stacks. Inflation takes place around
Externí odkaz:
https://doaj.org/article/1ce6d3caef4b4f848cf536aed77e8051
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 11, Pp 1-16 (2020)
Abstract We study the cosmological properties of a metastable de Sitter vacuum obtained recently in the framework of type IIB flux compactifications in the presence of three D7-brane stacks, based on perturbative quantum corrections at both world-she
Externí odkaz:
https://doaj.org/article/6bed04bcf0384ceda20e45edf82c4cf7
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 1, Pp 1-20 (2020)
Abstract We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Calabi-Yau threefolds or their orbifold limits, in the presence of D7-branes and orientifold planes. We show that they exhibit in general a loga
Externí odkaz:
https://doaj.org/article/6dac21add5764cbbbc2cad602c79fb89
Publikováno v:
Physics Letters B, Vol 810, Iss , Pp 135809- (2020)
The properties of the effective scalar potential are studied in the framework of type IIB string theory, taking into account perturbative and non-perturbative corrections. The former modify the Kähler potential and include α′ and logarithmic corr
Externí odkaz:
https://doaj.org/article/bdd28299698a4a46bb0c45a12d79514c
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 9, Pp 1-10 (2018)
Abstract We propose a new mechanism of (geometric) moduli stabilisation in type IIB/F-theory four-dimensional compactifications on Calabi–Yau manifolds, in the presence of 7-branes, that does not rely on non-perturbative effects. Complex structure
Externí odkaz:
https://doaj.org/article/6a55c6957bb04e9b94ac4503658b459f
Publikováno v:
Physics Letters B, Vol 782, Iss , Pp 353-361 (2018)
We make a first systematic study of non-universal TeV scale neutral gauge bosons Z′ arising naturally from a class of F-theory inspired models broken via SU(5) by flux. The phenomenological models we consider may originate from semi-local F-theory
Externí odkaz:
https://doaj.org/article/b251d91bdefd4ecb8c373ec574dabbe7