Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Jean-Marc Richard"'
Autor:
Jean-Marc Richard
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
We review the physics of low-energy antiprotons, and its link with the nuclear forces. This includes: antinucleon scattering on nucleons and nuclei, antiprotonic atoms, and antinucleon-nucleon annihilation into mesons.
Externí odkaz:
https://doaj.org/article/102bb0c434c94dc6a0173e96e6155c2e
Publikováno v:
Physics Letters B, Vol 800, Iss , Pp - (2020)
We present the first full-fledged study of the flavor-exotic isoscalar Tbb−≡bbu¯d¯ tetraquark with spin and parity JP=1+. We report accurate solutions of the four-body problem in a quark model, characterizing the structure of the state as a fun
Externí odkaz:
https://doaj.org/article/c7c067bcbb52469a850d96fcdb727226
Publikováno v:
Physics Letters B, Vol 790, Iss , Pp 248-250 (2019)
We use a constituent model to analyze the stability of pentaquark Q¯qqqq configurations with a heavy antiquark c¯ or b¯, and four light quarks uuds, ddsu or ssud. The interplay between chromoelectric and chromomagnetic effects is not favorable, an
Externí odkaz:
https://doaj.org/article/d108f5e66cd7479ebd8893a13161d646
Autor:
Jean-Marc Richard
L'ouvrage présente un panorama des particules élémentaires à interactions fortes, comme le proton et le neutron, constituants du noyau, le pion qui assure leur liaison, et toutes leurs excitations. Le modèle des quarks est exposé en détail. Il
We study the behavior of energy levels in two dimensions for exotic atoms, i.e., when a long-range attractive potential is supplemented by a short-range interaction, and compare the results with these of the one- and three-dimensional cases. The ener
Externí odkaz:
http://arxiv.org/abs/1006.5506
Publikováno v:
SciPost Physics Proceedings, Iss 3, p 051 (2020)
Three-body correlations in three-body exotic atoms are studied with simple models that consist of three bosons interacting through a superposition of long- and short-range potentials. We discuss the correlations among particles by comparing the en
Externí odkaz:
https://doaj.org/article/6ac71d877bef4d18b88f822282a29a93
Autor:
Jean-Marc Richard
'On a tué mon école'explore la crise actuelle de l'éducation, analysant comment une fierté nationale, l'école républicaine, a sombré dans la décadence. Naviguant entre le quotidien de l'éducation et les coulisses politiques, cette histoire e
Autor:
Jean-Marc Richard
Publikováno v:
Few Body Syst.
8th Asia-Pacific conference on Few-Body problems in Physics
8th Asia-Pacific conference on Few-Body problems in Physics, Mar 2021, Kanazawa, Japan. pp.37, ⟨10.1007/s00601-021-01622-3⟩
8th Asia-Pacific conference on Few-Body problems in Physics
8th Asia-Pacific conference on Few-Body problems in Physics, Mar 2021, Kanazawa, Japan. pp.37, ⟨10.1007/s00601-021-01622-3⟩
The existence of stable multiquarks made of heavy quarks and antiquarks is discussed in the framework of potential models. It is stressed that the few-body problem should be handled seriously and accurately. No bound state is found within the current
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dbb7601f9c62671cf368d5a01a7a77f
Publikováno v:
Chin.Phys.C
Chin.Phys.C, 2021, 45 (1), pp.013101. ⟨10.1088/1674-1137/abc067⟩
Chin.Phys.C, 2021, 45 (1), pp.013101. ⟨10.1088/1674-1137/abc067⟩
We revisit the hyperon weak radiative decays in the framework of the non-relativistic constituent quark model. This study confirms the nonlocal feature of the hyperon weak radiative transition operators which are dominated by the pole terms, and an o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5bf39c8f9df0829b329e03c7cc40fcb
https://hal.archives-ouvertes.fr/hal-02914458
https://hal.archives-ouvertes.fr/hal-02914458