Zobrazeno 1 - 10
of 2 997
pro vyhledávání: '"Jenks, P."'
Cosmological gravitational particle production (GPP) is a generic mechanism by which particles are produced during the inflationary epoch. In this work we consider the GPP of massive scalars in an effort to fully understand the spectrum of the produc
Externí odkaz:
http://arxiv.org/abs/2410.03938
Autor:
Chan, Yung-Chieh, Pu, George, Shanker, Apaar, Suresh, Parth, Jenks, Penn, Heyer, John, Denton, Sam
As large language models (LLMs) are applied to more use cases, creating high quality, task-specific datasets for fine-tuning becomes a bottleneck for model improvement. Using high quality human data has been the most common approach to unlock model p
Externí odkaz:
http://arxiv.org/abs/2409.19759
Autor:
Balasus, Nicholas, Jacob, Daniel J., Maxemin, Gabriel, Jenks, Carrie, Nesser, Hannah, Maasakkers, Joannes D., Cusworth, Daniel H., Scarpelli, Tia R., Varon, Daniel J., Wang, Xiaolin
We use satellite observations of atmospheric methane from the TROPOMI instrument to estimate total annual methane emissions for 2019-2023 from four large Southeast US landfills with gas collection and control systems. The emissions are on average 6$\
Externí odkaz:
http://arxiv.org/abs/2408.10957
Recent searches for parity breaking in the galaxy four-point correlation function, as well as the prospects for greatly improved sensitivity to parity breaking in forthcoming surveys, motivate the search for physical mechanisms that could produce suc
Externí odkaz:
http://arxiv.org/abs/2408.03994
Publikováno v:
JHEP 2024, 71 (2024)
Dark photons are a theorized massive spin-1 particle which can be produced via various mechanisms, including cosmological gravitational particle production (GPP) in the early universe. In this work, we extend previous results for GPP of dark photons
Externí odkaz:
http://arxiv.org/abs/2405.19390
Publikováno v:
Phys.Rev.Lett. 133 (2024) 6, 061602
We demonstrate that gravitational particle production (GPP) of a massive, Abelian, vector (Proca) field during inflation in the presence of nonminimal coupling to gravity may suffer from an instability which leads to runaway production of high-moment
Externí odkaz:
http://arxiv.org/abs/2403.15536
Autor:
Daniel, Tatsuya, Jenks, Leah
Publikováno v:
Phys. Rev. D 109 (2024) 12, 124012
It is known that the four-dimensional effective field theory arising from heterotic string theory is general relativity with both a Chern-Simons and Gauss-Bonnet term. We study the propagation of gravitational waves in this combination of Chern-Simon
Externí odkaz:
http://arxiv.org/abs/2403.09373
Autor:
Lagos, Macarena, Jenks, Leah, Isi, Maximiliano, Hotokezaka, Kenta, Metzger, Brian D., Burns, Eric, Farr, Will M., Perkins, Scott, Wong, Kaze W. K., Yunes, Nicolas
Extensions to General Relativity (GR) allow the polarization of gravitational waves (GW) from astrophysical sources to suffer from amplitude and velocity birefringence, which respectively induce changes in the ellipticity and orientation of the polar
Externí odkaz:
http://arxiv.org/abs/2402.05316
Parity violation in the gravitational sector is a prediction of many theories beyond general relativity. In the propagation of gravitational waves, parity violation manifests by inducing amplitude and/or velocity birefringence between right- and left
Externí odkaz:
http://arxiv.org/abs/2312.12532
Publikováno v:
Phys. Rev. D 109, 063507 (2024)
Isocurvature fluctuations, where the relative number density of particle species spatially varies, can be generated from initially adiabatic, or curvature, fluctuations if the various species fall out of or were never in thermal equilibrium. The free
Externí odkaz:
http://arxiv.org/abs/2311.17164