Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Jambul Gegelia"'
Autor:
Jambul Gegelia, Maxim V. Polyakov
Publikováno v:
Physics Letters B, Vol 820, Iss , Pp 136572- (2021)
Using dispersive representations of the nucleon gravitational form factors, the results for their absorptive parts from chiral effective field theory in curved space-time, and the mechanical stability conditions, we obtain a model independent inequal
Externí odkaz:
https://doaj.org/article/9796736f590e4904b771e4ab6f43d5a1
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-30 (2019)
Abstract We re-analyze the flavor decomposition of the pion-nucleon σ-term in the framework of baryon chiral perturbation to fourth order. We employ a covariant and the heavy baryon framework including also the low-lying decuplet. Using only continu
Externí odkaz:
https://doaj.org/article/e8af0b5997a34d2a9bb1b391d299af27
Publikováno v:
Nuclear Physics B, Vol 925, Iss , Pp 161-185 (2017)
We compare the subtractive renormalization and the Wilsonian renormalization group approaches in the context of an effective field theory for the two-nucleon system. Based on an exactly solvable model of contact interactions, we observe that the stan
Externí odkaz:
https://doaj.org/article/cb7e01ce9cb941a4be283f9c1365437d
Publikováno v:
Physics Letters B, Vol 763, Iss , Pp 1-8 (2016)
We calculate the width of the delta resonance at leading two-loop order in baryon chiral perturbation theory. This gives a correlation between the leading pion–nucleon–delta and pion–delta couplings, which is relevant for the analysis of pion
Externí odkaz:
https://doaj.org/article/60598f33ecd941b3b7136cb8703a6f27
Publikováno v:
Physics Letters B, Vol 760, Iss C, Pp 736-741 (2016)
We calculate the width of the Roper resonance at next-to-leading order in a systematic expansion of baryon chiral perturbation theory with pions, nucleons, and the delta and Roper resonances as dynamical degrees of freedom. Three unknown low-energy c
Externí odkaz:
https://doaj.org/article/4ef024c083774cdea5840cede7987480
Autor:
Ingo Tews, Zohreh Davoudi, Andreas Ekström, Jason D. Holt, Kevin Becker, Raúl Briceño, David J. Dean, William Detmold, Christian Drischler, Thomas Duguet, Evgeny Epelbaum, Ashot Gasparyan, Jambul Gegelia, Jeremy R. Green, Harald W. Grießhammer, Andrew D. Hanlon, Matthias Heinz, Heiko Hergert, Martin Hoferichter, Marc Illa, David Kekejian, Alejandro Kievsky, Sebastian König, Hermann Krebs, Kristina D. Launey, Dean Lee, Petr Navrátil, Amy Nicholson, Assumpta Parreño, Daniel R. Phillips, Marek Płoszajczak, Xiu-Lei Ren, Thomas R. Richardson, Caroline Robin, Grigor H. Sargsyan, Martin J. Savage, Matthias R. Schindler, Phiala E. Shanahan, Roxanne P. Springer, Alexander Tichai, Ubirajara van Kolck, Michael L. Wagman, André Walker-Loud, Chieh-Jen Yang, Xilin Zhang
Publikováno v:
Few-Body Systems
Few Body Syst.
Few Body Syst., 2022, 63 (4), pp.67. ⟨10.1007/s00601-022-01749-x⟩
Few Body Syst.
Few Body Syst., 2022, 63 (4), pp.67. ⟨10.1007/s00601-022-01749-x⟩
This is a collection of perspective pieces contributed by the participants of the Institute of Nuclear Theory's Program on Nuclear Physics for Precision Nuclear Physics which was held virtually from April 19 to May 7, 2021. The collection represents
Publikováno v:
Few-body systems 62(3), 51 (2021). doi:10.1007/s00601-021-01628-x
We discuss the formulation of a non-relativistic effective field theory for two-body P-wave scattering in the presence of shallow states and critically address various approaches to renormalization proposed in the literature. It is demonstrated that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ceec1b3a83b1f8879a6bc937d5cf5d51
http://arxiv.org/abs/2104.01823
http://arxiv.org/abs/2104.01823
Publikováno v:
The European physical journal / A 56(5), 152 (2020). doi:10.1140/epja/s10050-020-00162-4
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f975b8448485ae2bd1bb414580c3588e
http://arxiv.org/abs/2001.07040
http://arxiv.org/abs/2001.07040
Publikováno v:
The European physical journal / C 80(5), 406 (2020). doi:10.1140/epjc/s10052-020-7991-x
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-9 (2020)
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-9 (2020)
Integral equations for meson-baryon scattering amplitudes are obtained by utilizing time-ordered perturbation theory for a manifestly Lorentz-invariant formulation of baryon chiral perturbation theory. Effective potentials are defined as sums of two-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93c570876241ce4b226082f4b4529fdd
https://hdl.handle.net/2128/26725
https://hdl.handle.net/2128/26725
Publikováno v:
Nuclear Physics A. 1010:122175