Classical soft graviton theorem gives the gravitational wave-form at future null infinity late retarded time $u$ for a general classical scattering. The large expansion has three known universal terms: constant term, term proportional to $1/u$ and $\ln u/u^2$, whose coefficients are determined solely in terms of momenta incoming outgoing hard particles, including carried by electromagnetic radi...

We show that gravitons with energy $E<\mathrm{\ensuremath{\Omega}}$, where $\mathrm{\ensuremath{\Omega}}$ is the gap a localized nonrelativistic system, can be detected by finite-time interactions detector. Our detector based on quadrupole moment interaction between hydrogen atom and gravitational field in linearized approximation. In this model, external agent responsible for switching an o...

We consider the production of gravitons in an inflationary cosmology by approximating each epoch of change in the equation of state as sudden, from which a simple analytic graviton mode function has been derived. We use this mode function to compute the graviton spectral energy density and the tensor-induced cosmic microwave background anisotropy. The results are then compared to the numerical ...

Theories with compact extra spatial dimensions felt only by gravity are subject to direct experimental tests if the compactification volume is large. Estimates of high-energy collider observables induced by graviton radiation into extra dimensions are usually given assuming rigid branes. This may overestimate the accessibility of these theories. Brane fluctuations soften the coupling of gravito...

We study the graviton self-energy function in a general gauge, using a hard thermal loop expansion which includes terms proportional to T 4, T 2 and log(T ). We verify explicitly the gauge independence of the leading T 4 term and obtain a compact expression for the sub-leading T 2 contribution. It is shown that the logarithmic term has the same structure as the ultraviolet pole part of the T = ...

We report on a search for new particles in the diphoton channel using a data sample of 5.4 fb−1 of pp̄ collisions at a center-of-mass energy of 1.96 TeV collected using the CDF II detector at the Fermilab Tevatron. The invariant mass spectrum of the data agrees well with the standard model expectation. We set upper limits on the cross section times branching ratio for the Randall-Sundrum gravito...

We generalize the results of Randall and Sundrum to a wider class of four-dimensional spacetimes including the four-dimensional Schwarzschild background and de Sitter universe. We solve the equation for graviton propagation in a general four dimensional background and find an explicit solution for a zero mass bound state of the graviton. We find that this zero mass bound state is normalizable o...

The near-horizon geometry of an asymptotically AdS5 supersymmetric black hole discovered by Gutowski and Reall is analysed. After lifting the solution to 10 dimensions, we explicitly solve the Killing spinor equations in both Poincaré and global coordinates. It is found that exactly four supersymmetries are preserved which is twice the number for the full black hole. The full set of isometries ...

We report on a search for new particles in the diphoton channel using a data sample of 5.4 fb−1 of pp̄ collisions at a center-of-mass energy of 1.96 TeV collected using the CDF II detector at the Fermilab Tevatron. The invariant mass spectrum of the data agrees well with the standard model expectation. We set upper limits on the cross section times branching ratio for the Randall-Sundrum gravito...

The problem of the existence of nonzero invariant mass of the graviton can have the fundamental significance. The estimate for the upper bound on the graviton mass (m g < 2 · 10 −62) has been derived in Ref. [1], where the authors used the data on the existence of the gravitational coupling between the galaxy clusters, which is not cut off by the Yukawa potential at least up to distances ∼500 K...