Zobrazeno 1 - 10
of 188
pro vyhledávání: '"Gasparyan, A. M."'
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:
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.
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:
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
Publikováno v:
Phys. Rev. C 103, 045203 (2021)
We present a calculation of radiative pion photoproduction in the framework of covariant chiral perturbation theory with explicit $\Delta(1232)$ degrees of freedom. The analysis is performed employing the small scale expansion scheme adjusted for the
Externí odkaz:
http://arxiv.org/abs/2006.03917
Publikováno v:
Eur. Phys. J. A 56 (2020) 152
We briefly review general concepts of renormalization in quantum field theory and discuss their application to solutions of integral equations with singular potentials in the few-nucleon sector of the low-energy effective field theory of QCD. We also
Externí odkaz:
http://arxiv.org/abs/2001.07040