Results 91 to 100 of about 17,519 (197)

Gravity beyond Einstein? Yes, but in which direction? [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2022
Kazanas D   +2 more
europepmc   +1 more source

The massive flat space limit of cosmological correlators

open access: yesJournal of High Energy Physics
Abstract Identifying useful flat-space limits for cosmological correlators, where they can be expressed in terms of observables in Minkowski space is nontrivial due to their scale-invariant nature. In recent years, it has been shown that momentum-space correlators encode flat-space amplitudes at specific singularities that emerge ...
Sebastián Céspedes, Sadra Jazayeri
openaire   +3 more sources

Cosmological consequences of supersymmetric flat directions

open access: yes, 2009
In this work we analyze various implications of the presence of large field vacum expectation values (VEVs) along supersymmetric flat directions during the early universe. First, we discuss supersymmetric leptogenesis and the gravitino bound. Supersym- metric thermal leptogenesis with a hierarchical right-handed neutrino mass spectrum normally requires
openaire   +1 more source

A Comprehensive Analysis of Hyperbolical Fluids in Modified Gravity. [PDF]

open access: yesEntropy (Basel), 2022
Yousaf Z, Bhatti MZ, Khlopov M, Asad H.
europepmc   +1 more source

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