The four-point correlation function of graviton during inflation
نویسندگان
چکیده
منابع مشابه
Scalar Contribution to the Graviton Self - Energy during Inflation
We use dimensional regularization to evaluate the one loop contribution to the graviton self-energy from a massless, minimally coupled scalar on a locally de Sitter background. For noncoincident points our result agrees with the stress tensor correlators obtained recently by Perez-Nadal, Roura and Verdaguer. We absorb the ultraviolet divergences using the R and C counterterms first derived by ’...
متن کاملGeneral graviton exchange graph for four point functions in the
In this note we explicitly compute the graviton exchange graph for scalar fields with arbitrary conformal dimension ∆ in arbitrary spacetime dimension d. This results in an analytical function in ∆ as well as in d.
متن کاملA graviton propagator for inflation
We construct the scalar and graviton propagator in quasi de Sitter space up to first order in the slow roll parameter ǫ ≡ −Ḣ/H2. After a rescaling, the propagators are similar to those in de Sitter space with an ǫ correction to the effective mass. The limit ǫ → 0 corresponds to the E(3) vacuum that breaks de Sitter symmetry, but does not break spatial isotropy and homogeneity. The new propagato...
متن کاملthe effect of e-64 on the developmental competence of sheep cocs during in vitro maturation
in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
Dimensionally Regulated Graviton 1 - Point Function in de Sitter
We use dimensional regularization to compute the 1PI 1-point function of quantum gravity at one loop order in a locally de Sitter background. As with other computations, the result is a finite constant at this order. It corresponds to a small positive renormalization of the cosmological constant. PACS numbers: 04.30.Nk, 04.62.+v, 98.80.Cq, 98.80.Hw † e-mail: [email protected] ‡ e-mail: wood...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2015
ISSN: 1029-8479
DOI: 10.1007/jhep07(2015)132