Spin oscillations of neutrinos scattered by the supermassive black hole in the galactic center

Abstract

In this work, we study the propagation and spin oscillations of neutrinos in their scattering by a supermassive black hole (SMBH) surrounded by a realistic accretion disk. We review various descriptions of the fermion spin evolution in a curved spacetime under the influence of external fields. The overview of the test particle motion in the gravitational field of a rotating SMBH is also present. The external fields which a neutrino spin interacts with are the electroweak forces in plasma and the toroidal magnetic field in the accretion disk surrounding SMBH. Spin precession of neutrinos, which are supposed to be Dirac particles, is caused by the interaction of the neutrino magnetic moment with the magnetic field in the disk. We use a semi-analytical model of a thick accretion disk and review its characteristics. The cases of co-rotating and counter-rotating disks with respect to BH are discussed. We consider the incoming flux of neutrinos having an arbitrary angle with respect to the BH spin since the recent results of the Event Horizon Telescope indicate that the BH spin in the galactic center is not always perpendicular to the galactic plane. For our study, we consider a large number of incoming test neutrinos. We briefly discuss our results and their applications in the observations of astrophysical neutrinos.

40 pages, 23 figures

References in corpus (26)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
• Neutrino-Cooled Accretion Disks around Spinning Black Hole
• Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes
• Magnetized Tori around Kerr Black Holes: Analytic Solutions with a Toroidal Magnetic Field
• Fermion scattering by a Schwarzschild black hole
• Spin dynamics in gravitational fields of rotating bodies and the equivalence principle
• Diffuse neutrino flux measurements with the Baikal-GVD neutrino telescope
• General treatment of quantum and classical spinning particles in external fields
• IceCube search for neutrinos coincident with gravitational wave events from LIGO/Virgo run O3
• Observation of Seven Astrophysical Tau Neutrino Candidates with IceCube
• Semiclassical analysis of Dirac fields on curved spacetime
• General relativity effects in precision spin experimental tests of fundamental symmetries
• Gravitational Lensing of Supernova Neutrinos
• Neutrino spin oscillations in conformally gravity coupling models and quintessence surrounding a black hole
• Neutrino scattering off a black hole surrounded by a magnetized accretion disk
• Spin oscillations of neutrinos scattered off a rotating black hole
• Gravitational scattering of spinning neutrinos by a rotating black hole with a slim magnetized accretion disk
• Neutrino spin and flavor oscillations in gravitational fields
• Scattering of neutrinos by a rotating black hole accounting for the electroweak interaction with an accretion disk
• Curved-spacetime dynamics of spin-$\frac{1}{2}$ particles in superposed states from a WKB approximation of the Dirac equation
• Neutrino spin oscillations in a magnetized Polish doughnut
• Neutrino spin oscillations in gravitational fields in higher dimensions
• Spin precession and neutrino helicity flip in various spacetimes
• Spin oscillations in neutrino gravitational scattering