Zobrazeno 1 - 10
of 253
pro vyhledávání: '"Protasov, K"'
Autor:
Protasov, K. V., Gudkov, V., Kupriyanova, E. A., Nesvizhevsky, V. V., Snow, W. M., Voronin, A. Yu.
Publikováno v:
Phys. Rev. D 102, 075025 (2020)
The values of the antineutron-nucleus scattering lengths, and in particular their imaginary parts, are needed to evaluate the feasibility of using neutron mirrors in laboratory experiments to search for neutron-antineutron oscillations. We analyze ex
Externí odkaz:
http://arxiv.org/abs/2009.11467
Coherent forward neutron propagation in gas is discussed as a new approach to search for neutron-antineutron oscillations ($ n-\bar{n}$), which violate both $B$ and $B-L$ conservation. We show that one can increase the probability of neutron - antine
Externí odkaz:
http://arxiv.org/abs/1912.06730
Publikováno v:
Phys. Rev. Lett. 122, 221802 (2019)
An observation of neutron-antineutron oscillations ($ n-\bar{n}$), which violate both $B$ and $B-L$ conservation, would constitute a scientific discovery of fundamental importance to physics and cosmology. A stringent upper bound on its transition ra
Externí odkaz:
http://arxiv.org/abs/1810.04988
Autor:
Baeßler, S., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., Rebreyend, D., Kupriyanova, E. A., Voronin, A. Yu.
Publikováno v:
Phys. Rev. D 91, 042006 (2015)
Quantum states of ultracold neutrons in the gravitational field are to be characterized through gravitational resonance spectroscopy. This paper discusses systematic effects that appear in the spectroscopic measurements. The discussed frequency shift
Externí odkaz:
http://arxiv.org/abs/1501.03023
Publikováno v:
Advances in High Energy Physics 2014 (2014), 628125
Gravitational resonance spectroscopy consists in measuring the energy spectrum of bouncing ultracold neutrons above a mirror by inducing resonant transitions between different discrete quantum levels. We discuss how to induce the resonances with a fl
Externí odkaz:
http://arxiv.org/abs/1408.1009
Publikováno v:
Nuclear Inst. and Methods in Physics Research, A (2012), pp. 10-13
The probability of transition between levels of a quantum bouncer, induced by a noise-like perturbation, is calculated. The results are applied to two sources of noise (vibrations and mirror surface waviness) which might play an important role in fut
Externí odkaz:
http://arxiv.org/abs/1202.2988
Autor:
Cubitt, R., Lychagin, E. V., Muzychka, A. Yu., Nekhaev, G. V., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., Strelkov, A. V.
Publikováno v:
Nucl. Instr. Meth. A 622 (2010) 182
We predicted and observed for the first time the quasi-specular albedo of cold neutrons at small incidence angles from a powder of nanoparticles. This albedo (reflection) is due to multiple neutron small-angle scattering. The reflection angle as well
Externí odkaz:
http://arxiv.org/abs/0910.1469
Publikováno v:
Nucl.Instrum.Meth.A611:149-152,2009
In this paper, we discuss a possibility to improve constraints on spin-dependent short-range interactions in the range of 1 - 200 micrometer significantly. For such interactions, our constraints are without competition at the moment. They were obtain
Externí odkaz:
http://arxiv.org/abs/0902.3139
Autor:
Kreuz, M., Nesvizhevsky, V. V., Schmidt-Wellenburg, P., Soldner, T., Thomas, M., Boerner, H. G., Naraghi, F., Pignol, G., Protasov, K. V., Rebreyend, D., Vezzu, F., Flaminio, R., Michel, C., Pinard, L., Remillieux, A., Baessler, S., Gagarski, A. M., Grigorieva, L. A., Kuzmina, T. M., Meyerovich, A. E., Mezhov-Deglin, L. P., Petrov, G. A., Strelkov, A. V., Voronin, A. Yu.
Publikováno v:
Nucl. Instr. Meth. A 611 (2009) 326
We present a method to measure the resonance transitions between the gravitationally bound quantum states of neutrons in the GRANIT spectrometer. The purpose of GRANIT is to improve the accuracy of measurement of the quantum states parameters by seve
Externí odkaz:
http://arxiv.org/abs/0902.0156
Autor:
Lychagin, E. V., Muzychka, A. Yu., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., Strelkov, A. V.
Publikováno v:
Phys.Lett.B679:186-190,2009
We report on storage of Very Cold Neutrons (VCN) in a trap with walls containing powder of diamond nanoparticles. The efficient VCN reflection is provided by multiple diffusive elastic scattering of VCN at single nanoparticles in powder. The VCN stor
Externí odkaz:
http://arxiv.org/abs/0812.1635