Results 41 to 50 of about 15,035 (306)

A New Spin on Primordial Hydrogen Recombination and a Refined Model for Spinning Dust Radiation [PDF]

open access: yes, 2011
This thesis describes theoretical calculations in two subjects: the primordial recombination of the electron-proton plasma about 400,000 years after the Big Bang and electric dipole radiation from spinning dust grains in the present-day interstellar ...
Ali-Haimoud, Yacine
core   +1 more source

Mechanical Properties of Acoustically Levitated Granular Rafts

open access: yesPhysical Review X, 2022
We investigate a model system for the rotational dynamics of inertial many-particle clustering, in which submillimeter objects are acoustically levitated in air.
Melody X. Lim   +3 more
doaj   +1 more source

Angular Momentum of Phonons and the Einstein–de Haas Effect [PDF]

open access: yesPhysical Review Letters, 2014
We study angular momentum of phonons in a magnetic crystal. In the presence of a spin-phonon interaction, we obtain a nonzero angular momentum of phonons, which is an odd function of magnetization. At zero temperature, phonon has a zero-point angular momentum besides a zero-point energy.
Zhang, Lifa, Niu, Qian
openaire   +2 more sources

Remarks on propagating waves in non-linear vacuum electrodynamics

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
Using the quadratic expansion in the photon fields of Euler–Heisenberg (EH) non-linear electrodynamics (NLED) Lagrangian model we study relevant vacuum properties in a scenario involving the propagation of a photon probe in the presence of a background ...
M. A. Pérez-García   +2 more
doaj   +1 more source

Light-quarkonium spectra and orbital-angular-momentum decomposition in a Bethe–Salpeter-equation approach

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
We investigate the light-quarkonium spectrum using a covariant Dyson–Schwinger–Bethe–Salpeter-equation approach to QCD. We discuss splittings among as well as orbital angular momentum properties of various states in detail and analyze common features of ...
T. Hilger, M. Gómez-Rocha, A. Krassnigg
doaj   +1 more source

Transverse momentum broadening of medium-induced cascades in expanding media

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
In this work, we explore the features of gluonic cascades in static and Bjorken expanding media by numerically solving the full BDIM evolution equations in longitudinal momentum fraction x and transverse momentum $${{\varvec{k}}}$$ k using the Monte ...
Souvik Priyam Adhya   +4 more
doaj   +1 more source

Toward the Application of Three-Dimensional Approach to Few-body Atomic Bound States

open access: yesEPJ Web of Conferences, 2010
The first step toward the application of an effective non partial wave (PW) numerical approach to few-body atomic bound states has been taken. The two-body transition amplitude which appears in the kernel of three-dimensional Faddeev-Yakubovsky integral
Hadizadeh M.R., Tomio L.
doaj   +1 more source

Justifying the naive partonic sum rule for proton spin

open access: yesPhysics Letters B, 2015
We provide a theoretical basis for understanding the spin structure of the proton in terms of the spin and orbital angular momenta of free quarks and gluons in Feynman's parton picture.
Xiangdong Ji, Jian-Hui Zhang, Yong Zhao
doaj   +1 more source

QCD resummation of dijet azimuthal decorrelations in pp and pA collisions

open access: yesJournal of High Energy Physics, 2023
We study the azimuthal angular decorrelations of dijet production in both proton-proton (pp) and proton-nucleus (pA) collisions. By utilizing soft-collinear effective theory, we establish the factorization and resummation formalism at the next-to-leading
Mei-Sen Gao   +4 more
doaj   +1 more source

Dynamics of Charged Particles Moving around Kerr Black Hole with Inductive Charge and External Magnetic Field

open access: yesUniverse, 2021
We mainly focus on the effects of small changes of parameters on the dynamics of charged particles around Kerr black holes surrounded by an external magnetic field, which can be considered as a tidal environment.
Xin Sun   +5 more
doaj   +1 more source

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