Resources

Author(s): Jeff A. Dror, Hitoshi Murayama, and Nicholas L. Rodd Axions, hypothetical particles ubiquitous in theories of particle physics, can be produced in great profusion in the early Universe and remain relativistic to the present day, forming a relic background - a cosmic axion background (CaB). In the present paper, Jeff A. Dror, Hitoshi Murayama, and Nicolas L. Rodd explore different production mechanisms of relativistic relic axions and...

Author(s): Prarit Agarwal, Sunjin Choi, Joonho Kim, Seok Kim, and June Nahmgoong Through the gauge-gravity duality, certain field theory quantities can provide a microscopic description of the degrees of freedom responsible for the Bekenstein-Hawking entropy of black holes. In this paper, the authors develop a powerful numerical method to study the supersymmetric index on the gauge theory side, and show how certain aspects of a class of (AdS)...

Author(s): Fiona McCarthy, Simon Foreman, and Alexander van Engelen One of the serious hindrances to achieving a major goal of the next generation CMB experiments, the measurement of the sum of the neutrino masses, is the lack of sufficient knowledge of baryonic effects on the matter power spectrum. In this paper, the authors propose several mitigating strategies, which, they show, will serve to reduce these baryonic effects to a negligible level...

Author(s): J. Amaré, S. Cebrián, D. Cintas, I. Coarasa, E. García, M. Martínez, M. A. Oliván, Y. Ortigoza, A. Ortiz de Solórzano, J. Puimedón, A. Salinas, M. L. Sarsa, and P. Villar The DAMA/LIBRA experiment’s potential dark matter detection went unconfirmed for 20 years. Now, a similar experiment offers evidence against the result. [Phys. Rev. D 103, 102005] Published Thu May 27, 2021

Author(s): José Luis Bernal, Licia Verde, Raul Jimenez, Marc Kamionkowski, David Valcin, and Benjamin D. Wandelt The authors introduce a new actor in the current drama of the Hubble tension (conflicting measurements of H0), namely the age of the Universe tU, as determined by the oldest globular clusters, and show that if local measurements are correct, the resolution of the Hubble tension implies a modification of the cosmological standard model...

Author(s): M. S. Abdallah et al. (STAR Collaboration) The authors present the best high-precision measurements of the longitudinal double-spin asymmetry for jet and dijet production in polarized proton collisions, improving on their previous results. The data are sensitive to the gluon helicity distribution and provide new constraints. [Phys. Rev. D 103, L091103] Published Wed May 26, 2021

Author(s): S. Demirci, T. Lappi, and S. Schlichting In this paper, the authors study the origin of eccentricity, or more generally, the azimuthal asymmetry in the initial conditions of small colliding systems, such as the proton nucleus system. Of the contending sources, namely color charge fluctuations and the geometric fluctuation of the so called hot spots in the proton, they conclude that the latter is by far the dominant cause of the asymmetry...