Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Gasparyan A. M."'
The gravitational form factors of the deuteron are calculated in the framework of non-relativistic chiral effective field theory. Non-relativistic reduction of the matrix element of the energy-momentum tensor operator for spin-one systems is worked o
Externí odkaz:
http://arxiv.org/abs/2411.19909
We discuss a novel effective-field-theory-based approach for extracting two-body scattering information from finite volume energies, serving as an alternative to L\"uscher's method. By explicitly incorporating one-pion exchange, we overcome the chall
Externí odkaz:
http://arxiv.org/abs/2312.01930
Autor:
Stepanenko, A. A., Gasparyan, Yu. M.
The accurate assessment of the local tritium concentration in the tokamak first wall by means of the laser-induced desorption (LID) diagnostic is sought as one the key solutions to monitoring the local radioactive tritium content in the first wall of
Externí odkaz:
http://arxiv.org/abs/2308.05761
Autor:
Gasparyan, A. M., Epelbaum, E.
We extend the renormalizability study of the formulation of chiral effective field theory with a finite cutoff, applied to nucleon-nucleon scattering, by taking into account non-perturbative effects. We consider the nucleon-nucleon interaction up to
Externí odkaz:
http://arxiv.org/abs/2301.13032
Autor:
Gasparyan, A. M., Epelbaum, E.
We consider nucleon-nucleon scattering using the formulation of chiral effective field theory which is claimed to be renormalization group invariant. The cornerstone of this framework is the existence of a well-defined infinite-cutoff limit for the s
Externí odkaz:
http://arxiv.org/abs/2210.16225
Autor:
Conrad, Nils D.1 nils.conrad@ruhr-uni-bochum.de, Gasparyan, Ashot M.1 ashot.gasparyan@ruhr-uni-bochum.de, Epelbaum, Evgeny1 evgeny.epelbaum@ruhr-uni-bochum.de
Publikováno v:
EPJ Web of Conferences. 9/26/2024, Vol. 303, p1-6. 6p.
Publikováno v:
EPJ Web of Conferences, Vol 113, p 04024 (2016)
Nucleon-nucleon scattering in the 1S0 partial wave is considered in chiral effective field theory within the recently suggested renormalizable formulation based on the Kadyshevsky equation. Contact interactions are taken into account beyond the leadi
Externí odkaz:
https://doaj.org/article/8d2c85d8d37d4be786b99d631963c3a8
Autor:
Gasparyan, A. M., Epelbaum, E.
We present a study of two-nucleon scattering in chiral effective field theory with a finite cutoff to next-to-leading order in the chiral expansion. In the proposed scheme, the contributions of the lowest-order interaction to the scattering amplitude
Externí odkaz:
http://arxiv.org/abs/2110.15302
We study the reaction of pion photoproduction on the nucleon in the framework of chiral perturbation theory with explicit $\Delta(1232)$ degrees of freedom. In the covariant approach, we give results up to order $\epsilon^3$ in the small scale expans
Externí odkaz:
http://arxiv.org/abs/2108.01619
Publikováno v:
Phys. Rev. C 103, 035201 (2021)
We compute various nucleon polarizabilities in chiral perturbation theory implementing the $\Delta$-full ($\Delta$-less) approach up to order $\epsilon^3 + q^4$ ($q^4$) in the small-scale (chiral) expansion. The calculation is carried out using the c
Externí odkaz:
http://arxiv.org/abs/2007.08438