Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Deffayet, Cedric"'
We recently described a protocol for computing the potential energy in heterotic M-theory for the dilaton, complex structure and K\"ahler moduli. This included the leading order non-perturbative contributions to the complex structure, gaugino condens
Externí odkaz:
http://arxiv.org/abs/2401.04828
We compute the potential energy for the dilaton, complex structure and Kahler moduli and search of realistic vacua of heterotic M-theory compactified on Calabi-Yau threefolds. We present a protocol for deriving the potential that combines the non-per
Externí odkaz:
http://arxiv.org/abs/2312.04656
Negative kinetic energies correspond to ghost degrees of freedom, which are potentially of relevance for cosmology, quantum gravity, and high energy physics. We present a novel wide class of stable mechanical systems where a positive energy degree of
Externí odkaz:
http://arxiv.org/abs/2305.09631
We present a simple class of mechanical models where a canonical degree of freedom interacts with another one with a negative kinetic term, i.e. with a ghost. We prove analytically that the classical motion of the system is completely stable for all
Externí odkaz:
http://arxiv.org/abs/2108.06294
Publikováno v:
Phys. Rev. D 103, 036010 (2021)
We show that domain walls, or kinks, can be constructed in simple scalar theories where the scalar has no potential. These theories belong to a class of k-essence where the Lagrangian vanishes identically when one lets the derivatives of the scalar v
Externí odkaz:
http://arxiv.org/abs/2009.00404
Publikováno v:
Phys. Rev. D 102, 064037 (2020)
Degenerate scalar-tensor theories of gravity extend general relativity by a single degree of freedom, despite their equations of motion being higher than second order. In some cases, this is a mere consequence of a disformal field redefinition carrie
Externí odkaz:
http://arxiv.org/abs/2004.11619
Publikováno v:
Phys. Rev. D 100, 101701 (2019)
We revisit the problem of building consistent interactions for a multiplet of partially massless spin-2 fields in (anti-)de Sitter space. After rederiving and strengthening the existing no-go result on the impossibility of Yang-Mills type non-abelian
Externí odkaz:
http://arxiv.org/abs/1906.03868
Publikováno v:
JHEP 1807 (2018) 021
Cohomological techniques within the Batalin-Vilkovisky (BV) extension of the Becchi-Rouet-Stora-Tyutin (BRST) formalism have proved invaluable for classifying consistent deformations of gauge theories. In this work we investigate the application of t
Externí odkaz:
http://arxiv.org/abs/1806.04695
Publikováno v:
Phys. Rev. D 96, 045014 (2017)
We provide a complete classification of all abelian gauge invariant $p$-form theories with equations of motion depending only on the second derivative of the field---the $p$-form analogues of the Galileon scalar field theory. We construct explicitly
Externí odkaz:
http://arxiv.org/abs/1704.02980
Publikováno v:
Phys. Rev. D 95, 124036 (2017)
We show that a partially massless graviton can propagate on a large set of spacetimes which are not Einstein spacetimes. Starting from a recently constructed theory for a massive graviton that propagates the correct number of degrees of freedom on an
Externí odkaz:
http://arxiv.org/abs/1703.02538