Zobrazeno 1 - 10
of 427
pro vyhledávání: '"KOSHCHII, A."'
Publikováno v:
Phys. Rev. C 103, 064316 (2021)
We study the beam-normal single-spin asymmetry (BNSSA) in high-energy elastic electron scattering from several spin-0 nuclei. Existing theoretical approaches work in the plane-wave formalism and predict the BNSSA to scale as $\sim A/Z$ with the atomi
Externí odkaz:
http://arxiv.org/abs/2102.11809
Autor:
Koshchii, Oleksandr, Erler, Jens, Gorchtein, Mikhail, Horowitz, Charles J., Piekarewicz, Jorge, Roca-Maza, Xavier, Seng, Chien-Yeah, Spiesberger, Hubert
Publikováno v:
Phys. Rev. C 102, 022501 (2020)
We present a feasibility study of a simultaneous sub-percent extraction of the weak charge and the weak radius of the ${}^{12}$C nucleus using parity-violating electron scattering, based on a largely model-independent assessment of the uncertainties.
Externí odkaz:
http://arxiv.org/abs/2005.00479
Publikováno v:
Phys. Rev. D 100, 053007 (2019)
We present the fully up-to-date calculation of the $\gamma Z$-box correction which needs to be taken into account to determine the weak mixing angle at low energies from parity-violating electron proton scattering. We make use of neutrino and antineu
Externí odkaz:
http://arxiv.org/abs/1907.07928
Autor:
Koshchii, Oleksandr, Afanasev, Andrei
Publikováno v:
Phys. Rev. D 100, 096020 (2019)
We estimate the beam-normal single-spin asymmetry in elastic lepton-proton scattering without employing the ultrarelativistic approximation. Our calculation is relevant for analyses of muon scattering at energies of few hundred MeV and below -- when
Externí odkaz:
http://arxiv.org/abs/1905.10217
Autor:
Koshchii, Oleksandr, Afanasev, Andrei
Elastic lepton scattering off of a nucleon has proved to be an efficient tool to study the structure of the hadron. Modern cross section and asymmetry measurements at Jefferson Lab require effects beyond the leading order Born approximation to be tak
Externí odkaz:
http://arxiv.org/abs/1807.06163
Autor:
Koshchii, Oleksandr, Afanasev, Andrei
Publikováno v:
Phys. Rev. D 98, 056007 (2018)
We estimate the target-normal single-spin asymmetry at nearly forward angles in elastic electron-nucleon scattering. In the leading-order approximation, this asymmetry is proportional to the imaginary part of the two-photon exchange (TPE) amplitude,
Externí odkaz:
http://arxiv.org/abs/1803.04004
Autor:
Koshchii, O., Afanasev, A.
Publikováno v:
Phys. Rev. D 96, 016005 (2017)
The charge asymmetry due to higher-order QED corrections in elastic lepton-proton scattering is estimated without employing the ultrarelativistic approximation. Our calculation is performed by generalizing the soft-photon approximation approach sugge
Externí odkaz:
http://arxiv.org/abs/1705.00338
Autor:
Koshchii, O., Afanasev, A.
Publikováno v:
Phys. Rev. D 94, 116007 (2016)
Lepton mass effects play a decisive role in description of elastic lepton-proton scattering when the beam's energy is comparable to the mass of the lepton. The future MUSE experiment, which is devised to solve the "Proton Radius Puzzle", is going to
Externí odkaz:
http://arxiv.org/abs/1608.01991
Publikováno v:
Журнал органічної та фармацевтичної хімії, Vol 18, Iss 3, Pp 25-34 (2020)
Aim. To find out the possibility of using tertiary substrates as benchmarks for determining the kinetic parameters of the ionizing ability of solvents Y. Results and discussion. The rate of heterolysis of tertiary substrates, especially adamantyl
Externí odkaz:
https://doaj.org/article/fef574c5270a477e9cc6f9a10da394bc
Using a covariant diagram technique and the concept of a nucleus as an elementary particle we calculated differential cross-sections for two-particle photodisintegration reactions of the He-4. The only functional parameter was the vertex structure fu
Externí odkaz:
http://arxiv.org/abs/1212.5419