Speaker
Description
Low-energy neutrino interaction with superfluid He-4 can take place in the form of coherent elastic neutrino-atom scattering (CEvAS)[1]-a process that has not been observed so far. The first experimental study of CEvAS is under preparation in the National Center for Physics and Mathematics in Sarov [2].For example,one of the observable effects of beyond-Standard-Model physics in CEvAS can be neutrino millicharge and magnetic moment [3].In this study, we have applied the formalism of open quantum systems [4] to describe the evolution of the recoil helium atom after neutrino scattering on superfluid helium.In particular, we have obtained the Lindblad equation for a helium atom with an initial recoil energy of higher than 2 meV — the energy enough to knock the atom out from the condensate.[1] M. Cadeddu, et al., Potentialities of a low-energy detector based on 4He evaporation to observe atomic effects in coherent neutrino scattering and physics perspectives, Phys.Rev.D 100 (2019) no.7, 073014.[2] А.А. Yukhimchuk, et al., Physics of hydrogen isotopes, FIZMAT 1 (2023) 5. [3] G. Donchenko, et al, Elastic neutrino-atom scattering as a probe of neutrino millicharge and magnetic moment, JETP Lett. 117 (2023) 879.[4]H.-P. Breuer, F. Petruccione, The Theory of Open Quantum Systems, Oxford University Press, 2002.
| I read the instructions above | Yes |
|---|