General relativity effects in precision spin experimental tests of fundamental symmetries

Vergeles, S. N.; Nikolaev, Nikolay N.; Obukhov, Yurii N.; Silenko, Aleksandr Ya.; Teryaev, Oleg

doi:10.3367/ufne.2021.09.039074

Cited by 8 publications

(3 citation statements)

References 410 publications

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“…The evolution of the relic neutrinos spin in stochastic gravitational fields was studied in [15]. The recent studies of the fermion spin evolution in external gravitational fields were reviewed in [16].…”

Section: Introductionmentioning

confidence: 99%

Gravitational scattering of spinning neutrinos by a rotating black hole with a slim magnetized accretion disk

Dvornikov¹

2022

Class. Quantum Grav.

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We study neutrinos gravitationally scattered off a rotating supermassive black hole which is surrounded by a thin accretion disk with a realistic magnetic field. Neutrinos are supposed to be Dirac particles having a nonzero magnetic moment. Neutrinos move along arbitrary trajectories, with the incoming flux being parallel to the equatorial plane. We exactly account for the influence of both gravity and the magnetic field on the neutrino motion and its spin evolution. The general statement that the helicity of an ultrarelativistic neutrino is constant in the particle scattering in an arbitrary gravitational field is proven within the quasiclassical approach. We find the measurable fluxes of outgoing neutrinos taking into account the neutrino spin precession in the external field in curved spacetime. These fluxes turn out to be significantly suppressed for some parameters of the system. Finally, we discuss the possibility to observe the predicted phenomena for core-collapsing supernova neutrinos in our Galaxy.

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Section: Introductionmentioning

confidence: 99%

Gravitational scattering of spinning neutrinos by a rotating black hole with a slim magnetized accretion disk

Dvornikov¹

2022

Class. Quantum Grav.

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“…Also, the large vorticity and acceleration provides the access to largest ever effective gravity [39] and emergent conical singularity [40]. It is important, that equivalence principle for spin motion in non-inertial frame is deeply related to quantum measurements [41,42] and one might expect also the relation to irreversibility in heavy-ion collisions.…”

Section: Discussionmentioning

confidence: 99%

Velocity-like maximum polarization: irreversibility and quantum measurements

Teryaev

2022

Preprint

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The polarization emerging in the subsequent scattering processes can never exceed 1 which corresponds to the fully polarized pure state. This property is shown to be provided by the addition rule similar to that for relativistic velocities never exceeding the speed of light. The cases of spin 1/2 and 1 are considered. The photon linear polarization in Thomson scattering is monotonically increasing. This directness is shown to be a consequence of spin measurement procedure and may be the particular example of ithe anticipated relation between quantum measurement and time irreversibility. The emergent polarization may be considered as a case of opposing time's arrows corresponding to microscopic (spin) and macroscopic (momentum) degrees of freedom, respectively.

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“…The spin-gravity coupling is of basic physical significance due to the fundamental nature of the intrinsic spin of the particles and the universality of the gravitational interaction. For prospects regarding the measurement of intrinsic spin-gravity coupling, see [15][16][17][18][19]. In general, B depends on the position, and the intrinsic spin-gravity coupling leads to a measured gravitomagnetic Stern-Gerlach force of the form − ∇(S • B).…”

Section: Introductionmentioning

confidence: 99%

Spin-Gravity Coupling in a Rotating Universe

2023

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The coupling of intrinsic spin with the nonlinear gravitomagnetic fields of Gödel-type spacetimes is studied. We work with Gödel-type universes in order to show that the main features of spin-gravity coupling are independent of causality problems of the Gödel universe. The connection between the spin–gravitomagnetic field coupling and Mathisson’s spin-curvature force is demonstrated in the Gödel-type universe. That is, the gravitomagnetic Stern–Gerlach force due to the coupling of spin with the gravitomagnetic field reduces in the appropriate correspondence limit to the classical Mathisson spin-curvature force.

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General relativity effects in precision spin experimental tests of fundamental symmetries

Cited by 8 publications

References 410 publications

Gravitational scattering of spinning neutrinos by a rotating black hole with a slim magnetized accretion disk

Gravitational scattering of spinning neutrinos by a rotating black hole with a slim magnetized accretion disk

Velocity-like maximum polarization: irreversibility and quantum measurements

Spin-Gravity Coupling in a Rotating Universe

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