Zobrazeno 1 - 10
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pro vyhledávání: '"D.O. Riska"'
Autor:
D.O. Riska
Publikováno v:
The European Physical Journal A. 32:389-392
The present empirical information on the proton strangeness form factors suggests that the uuds subsystem of the uuds \( \bar s \) configuration has the flavor spin symmetry [4] FS [22] F [22] S , mixed orbital symmetry [31] X and that the \( \bar s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dfae56a71c6e9bf4476acbf1db6700a
https://doi.org/10.1140/epja/i2006-10399-6
https://doi.org/10.1140/epja/i2006-10399-6
Publikováno v:
Physical Review D. 92
Using the bound state version of the topological soliton model for the baryons we show that the existence of a bound (or quasibound) $\overline{D}$-soliton state leads to the possibility of having hidden charm pentaquarks with quantum numbers and mas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a439fd4d87d3c375392b1b99b4ecc855
https://doi.org/10.1103/physrevd.92.051501
https://doi.org/10.1103/physrevd.92.051501
Autor:
B. Juliá-Díaz, D.O. Riska
Publikováno v:
Nuclear Physics A. 780:175-186
The role of q q ¯ components in the nucleon and the N ( 1440 ) resonance is studied by explicit coupling of the lowest positive parity q q q q q ¯ state to the qqq components in the harmonic oscillator quark model. The lowest energy q q q q q ¯ co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c95f70381ffa3d4e8c676b791a05b40
https://doi.org/10.1016/j.nuclphysa.2006.09.016
https://doi.org/10.1016/j.nuclphysa.2006.09.016
Autor:
Q.B. Li, D.O. Riska
Publikováno v:
Nuclear Physics A. 766:172-182
An admixture of 10–20% of q q q q q ¯ components in the Δ ( 1232 ) resonance is shown to reduce the well known underprediction by the qqq quark model of the decay width for Δ ( 1232 ) → N γ decay by about half and that of the corresponding he
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58cce2cd245d4e3c365400438f20aa49
https://doi.org/10.1016/j.nuclphysa.2005.11.020
https://doi.org/10.1016/j.nuclphysa.2005.11.020
Autor:
Bruno Julia-Diaz, D.O. Riska
Publikováno v:
Nuclear Physics A. 757:441-455
The Δ – N electromagnetic transition form factors are calculated in a schematic Poincare covariant quark model in three forms of relativistic kinematics. Addition of D-state components to pure S-state model wave functions, chosen so as to reproduc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20105e524edb0f7be6bc1e08341351ff
https://doi.org/10.1016/j.nuclphysa.2005.04.008
https://doi.org/10.1016/j.nuclphysa.2005.04.008
Autor:
D.O. Riska
Publikováno v:
International Journal of Modern Physics A. 20:1785-1790
The chiral quark model posits that pions couple to the axial current of constituent quarks. This chiral pion coupling governs the pion decays of baryon resonances and also implies pion and multipion interactions between the quarks. The qualitative fe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::384b12dc76bd4c7fb3f33b79e151294a
https://doi.org/10.1142/s0217751x05023335
https://doi.org/10.1142/s0217751x05023335
Autor:
D.O. Riska, F. Coester
Publikováno v:
Nuclear Physics A. 728:439-456
The general features of baryon form factors calculated with point form kinematics are derived. With point form kinematics and spectator currents hadronic form factors are functions of η:= 1 4 (v out −v in ) 2 and, over a range of η values, are in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1079cc5cfe728d733cabb9b31ebbcf50
https://doi.org/10.1016/j.nuclphysa.2003.09.003
https://doi.org/10.1016/j.nuclphysa.2003.09.003
Autor:
D.O. Riska
Publikováno v:
The European Physical Journal A. 18:201-205
Expression of the nucleon-nucleon interaction to leading order in 1/N C in terms of Fermi invariants allows a dynamical interpretation of the interaction and a consistent construction of the associated interaction currents. The numerically significan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a891ac2aba5e1e967189aa01ebdc1c71
https://doi.org/10.1140/epja/i2002-10299-9
https://doi.org/10.1140/epja/i2002-10299-9