Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Ridgway, Alexander K."'
Publikováno v:
Phys. Rev. Lett. 129, 121601, 2022
We present a new formula for the angular momentum $J^{\mu\nu}$ carried away by gravitational radiation in classical scattering. This formula, combined with the known expression for the radiated linear momentum $P^\mu$, completes the set of radiated P
Externí odkaz:
http://arxiv.org/abs/2203.04283
Autor:
Green, Daniel, Ridgway, Alexander K.
The baryon acoustic oscillations (BAO) provide an important bridge between the early universe and the expansion history at late times. While the BAO has primarily been used as a standard ruler, it also encodes recombination era physics, as demonstrat
Externí odkaz:
http://arxiv.org/abs/2008.05026
Publikováno v:
Phys. Rev. D 100, 043534 (2019)
We study a simple extension of quasi-single field inflation in which the inflaton interacts with multiple extra massive scalars known as isocurvatons. Due to the breaking of time translational invariance by the inflaton background, the theory include
Externí odkaz:
http://arxiv.org/abs/1903.11607
Autor:
Ridgway, Alexander K., Wise, Mark B.
We estimate the branching ratio for the inclusive decays $\Xi_{bbq} \rightarrow {\bar B}_c^{(*)}+X_{c,s,q}$ to be approximately 1%. Our estimate is performed using non-relativistic potential quark model methods that are appropriate if the bottom and
Externí odkaz:
http://arxiv.org/abs/1902.04582
Primordial non-Gaussianities enhanced at small wavevectors can induce a power spectrum of the galaxy overdensity that differs greatly from that of the matter overdensity at large length scales. In previous work, it was shown that "squeezed" three-poi
Externí odkaz:
http://arxiv.org/abs/1712.07657
Publikováno v:
Phys. Rev. D 97, 085019 (2018)
We extend the perturbative classical double copy to the analysis of bound systems. We first obtain the leading order perturbative gluon radiation field sourced by a system of interacting color charges in arbitrary time dependent orbits, and test its
Externí odkaz:
http://arxiv.org/abs/1711.09493
Publikováno v:
Phys. Rev. D 97, 123528 (2018)
We consider a quasi-single field inflation model in which the inflaton interacts with a massive scalar field called the isocurvaton. Due to the breaking of time translational invariance by the inflaton background, these interactions induce kinetic mi
Externí odkaz:
http://arxiv.org/abs/1711.02667
In quasi single field inflation there are massive fields that interact with the inflaton field. If these other fields are not much heavier than the Hubble constant during inflation ($H$) these interactions can lead to important consequences for the c
Externí odkaz:
http://arxiv.org/abs/1706.09971
We construct perturbative classical solutions of the Yang-Mills equations coupled to dynamical point particles carrying color charge. By applying a set of color to kinematics replacement rules first introduced by Bern, Carrasco and Johansson (BCJ), t
Externí odkaz:
http://arxiv.org/abs/1611.03493
Autor:
Ridgway, Alexander K., Wise, Mark B.
Publikováno v:
Phys. Rev. D 94, 044023 (2016)
We discuss the physical interpretation of stress-energy tensors that source static spherically symmetric Kerr-Schild metrics. We find that the sources of such metrics with no curvature singularities or horizons do not simultaneously satisfy the weak
Externí odkaz:
http://arxiv.org/abs/1512.02243