Conveners
Polarization phenomena, spin physics
- Valery Troshin (JINR)
Polarization phenomena, spin physics
- Sergey Goloskokov (JINR)
Exclusive photoproduction of heavy $J/\Psi$ meson is performed within the handbag
approach where amplitudes factorize into hard subprocesses and generalized parton
distributions (GPDs). The general parton distributions (GPDs) for gluons $H_g$, are
constructed using double distribution representation. The calculated cross section for
few sets of $H_g$, GPDs describe fine $J/\Psi$...
We give a report on new developments in the ReneSANCe Monte Carlo event generator. ReneSANCe is an event generator for simulation of the Standard Model processes at $ee$, $pp$ and $\gamma\gamma$ colliders.
Using first-principle lattice simulations, we study the equation of state of rotating SU(3) gluodynamics. We expand the free energy of the rotating gluon system in a series of angular velocity and measure the first two non-zero coefficients of this expansion (the second and fourth order). The second-order coefficient is associated with the rigid moment of inertia of gluon plasma, while...
The relativistic quantum-mechanical description of a charged Laguerre-Gauss beam accelerated in a uniform electric field has been fulfilled [1]. Stationary wave eigenfunctions are rigorously derived. The evolution of the beam parameters during acceleration is considered in detail. The practically important effect of extraordinary suppression of transverse spreading of the beam is discovered,...
In this report we present the results of our study of rotating gluodynamics. In particular, we carry out lattice calculation of total angular momentum of rotating gluodynamics for various temperatures and angular velocities within local thermalization approximation. In this approximation, instead of simulating the full action, we use the action with the coefficients being fixed at some...
We study spin oscillations of neutrinos which travel at an arbitrary angle with respect to the equatorial plane of a rotating black hole. The black hole is surrounded by a thick magnetized accretion disk. The gravitationally scattered neutrinos experience spin precession caused by the interactions of the neutrino magnetic moment with the toroidal magnetic fields in the disk as well as with the...
We study spin-flavor oscillations of neutrinos in a magnetic field within the quantum field theory approach in which neutrinos are virtual particles. Neutrinos are taken to be Majorana particles having a nonzero transition magnetic moment. We derive the dressed propagators of the neutrino mass eigenstates exactly accounting for the magnetic field contribution. The matrix element and the...
The spin polarization of lambda hyperons exhibits an anisotropic alignment with the total orbital angular momentum of the collision system, serving as a probe for vorticity in the strongly-interacting matter. We study the lambda hyperon decay into a proton and a pion to measure global polarization in heavy-ion collisions, adopting an approach previously used by the STAR Collaboration to...
In the framework of field or quantum theory of the electromagnetism, presented by the Maxwell-Schrodinger and the Maxwell-Dirac equations, there is no an operator of the electric charge that could replace the artificial operation of charge conjugation and explain on the fundamental field-theoretical level a reason of the existence in the Nature the positive and negative...
