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Pseudo-Quantum Electrodynamics: 30 Years of Reduced QED.
Entropy (Basel)
October 2024
Faculdade de Física, Universidade Federal do Pará, Belém 66075-110, Brazil.
Charged quasiparticles, which are constrained to move on a plane, interact by means of electromagnetic (EM) fields which are not subject to this constraint, living, thus, in three-dimensional space. We have, consequently, a hybrid situation where the particles of a given system and the EM fields (through which they interact) live in different dimensions. Pseudo-Quantum Electrodynamics (PQED) is a U(1) gauge field theory that, despite being strictly formulated in two-dimensional space, precisely describes the real EM interaction of charged particles confined to a plane.
View Article and Find Full Text PDFAngular Momentum Loss due to Tidal Effects in the Post-Minkowskian Expansion.
Phys Rev Lett
July 2023
Department of Physics and Astronomy, Uppsala University, Box 516, SE-75237 Uppsala, Sweden and NORDITA, KTH Royal Institute of Technology and Stockholm University, Hannes Alfvéns väg 12, SE-11419, Stockholm, Sweden.
We calculate the tidal corrections to the loss of angular momentum in a two-body collision at leading post-Minkowskian order from an amplitude-based approach. The eikonal operator allows us to efficiently combine elastic and inelastic amplitudes, and captures both the contributions due to genuine gravitational-wave emissions and those due to the static gravitational field. We calculate the former by harnessing powerful collider-physics techniques such as reverse unitarity, thereby reducing them to cut two-loop integrals, and cross check the result by performing an independent calculation in the post-Newtonian limit.
View Article and Find Full Text PDFRoadmap to Thermal Dark Matter beyond the Weakly Interacting Dark Matter Unitarity Bound.
Phys Rev Lett
April 2023
Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
We study the general properties of the freeze-out of a thermal relic. We give analytic estimates of the relic abundance for an arbitrary freeze-out process, showing when instantaneous freeze-out is appropriate and how it can be corrected when freeze-out is slow. This is used to generalize the relationship between the dark matter mass and coupling that matches the observed abundance.
View Article and Find Full Text PDFModel-Independent Determination of Nuclear Weak Form Factors and Implications for Standard Model Precision Tests.
Phys Rev Lett
April 2023
Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA and Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.
We analyze the recoil corrections in superallowed beta decays of T=1, J^{P}=0^{+} nuclei by fixing the mean square charged weak radius model independently using the data of multiple charge radii across the nuclear isotriplet. By comparing to model estimations, we argue that the existing theory uncertainty in the statistical rate function f might have been substantially underestimated. We discuss the implications of our proposed strategy for precision tests of the standard model, including a potential alleviation of the first-row CKM unitarity deficit, and motivate new experiments for charge radii measurements.
View Article and Find Full Text PDFAccidentally Asymmetric Dark Matter.
Phys Rev Lett
November 2021
Center for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, Columbus, Ohio 43210, USA.
We study the effect of a first-order phase transition in a confining SU(N) dark sector with heavy dark quarks. The baryons of this sector are the dark matter candidates. During the confinement phase transition the heavy quarks are trapped inside isolated, contracting pockets of the deconfined phase, giving rise to a second stage of annihilation that dramatically suppresses the dark quark abundance.
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