Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Michael D. Scadron"'
Publikováno v:
Fortschritte der Physik. 61:994-1027
This review of the quark-level linear \sigma model is based upon the dynamical realization of the pseudoscalar and scalar mesons as a linear representation of SU(2) x SU(2) chiral symmetry, with the symmetry weakly broken by current quark masses. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27418c224145d8aa8a0b71c0b3fabf0d
https://doi.org/10.1002/prop.201300022
https://doi.org/10.1002/prop.201300022
Publikováno v:
International Journal of Modern Physics A. 20:6189-6199
Many meson processes are related to the U_A(1) axial anomaly, present in the Feynman graphs where fermion loops connect axial vertices with vector vertices. However, the coupling of pseudoscalar mesons to quarks does not have to be formulated via axi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa64fd32a55fd50f46fa7c98dea11871
https://doi.org/10.1142/s0217751x05029216
https://doi.org/10.1142/s0217751x05029216
Publikováno v:
Modern Physics Letters A. 19:2267-2278
Data indicate that ΔI=3/2 transitions account for 4.5–4.7% of both CP conserving and CP violating K→2π decays, as well as CP conserving radiative K→ππγ processes. Observed K→ππγ/ππ branching ratios are shown to scale near α/π or
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https://explore.openaire.eu/search/publication?articleId=doi_________::c19945e3a3fa0e5eee423eee5108b3fe
https://doi.org/10.1142/s0217732304015567
https://doi.org/10.1142/s0217732304015567
Autor:
Michael D. Scadron
The fundamental goal of physics is an understanding of the forces of nature in their simplest and most general terms. Yet the scientific method inadver tently steers us away from that course by requiring an ever finer subdivision of the problem int
Publikováno v:
Nuclear Physics A. 724:391-409
The quark-level linear sigma model is employed to compute a variety of electromagnetic and weak observables of light mesons, including pion and kaon form factors and charge radii, charged-pion polarizabilities, semileptonic weak $K_{\ell3}$ decay, se
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be140630615244ff38aa0105722bb3f7
https://doi.org/10.1016/s0375-9474(03)01553-7
https://doi.org/10.1016/s0375-9474(03)01553-7
Autor:
Michael D. Scadron, J. Lowe
Publikováno v:
Modern Physics Letters A. 17:2497-2512
First we extract the long-distance (LD) weak matrix element from certain data and give compatible theoretical estimates. We also link this LD scale to the single-quark-line (SQL) transition scale and then test the latter SQL scale against the decuple
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a828a514180796c1a76ee58046742640
https://doi.org/10.1142/s0217732302008976
https://doi.org/10.1142/s0217732302008976
Autor:
V. A. Ivanova, A. Ya. Berdnikov, Michael D. Scadron, V. F. Kosmach, Ya. A. Berdnikov, A. N. Ivanov, N. I. Troitskaya
Publikováno v:
The European Physical Journal A. 12:341-347
Polarization properties of strange baryons produced in pp reactions, p + p -> p + Lambda^0 + K^+ and p + p -> p + Sigma^0 + K^$, near thresholds of the final states (p Lambda^0 K^+) and (p Sigma^0 K^+) are analysed relative to polarizations of collid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a5ef3d7e0bb4e95b854a79515bf33c9
https://doi.org/10.1007/s100500170012
https://doi.org/10.1007/s100500170012
Publikováno v:
Journal of Physics G: Nuclear and Particle Physics. 27:1775-1784
The SU(3) linear sigma model is dynamically generated in loop-order using the nonstrange-strange basis. Only self-consistent logarithmic divergent graphs are needed, with quadratic divergent graphs replaced by SU(3) mass-shell equal splitting laws. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12268662b98868dcace5323eadfe8839
https://doi.org/10.1088/0954-3899/27/8/307
https://doi.org/10.1088/0954-3899/27/8/307
Publikováno v:
Physics Letters B. 512:317-322
We extract the K^+-->pi^+e^+e^- amplitude scale at q^2=0 from the recent Brookhaven E865 high-statistics data. We find that the q^2=0 scale is fitted in excellent agreement with the theoretical long-distance amplitude. Lastly, we find that the observ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68cae30ba535047cafa5c16cb3551bcf
https://doi.org/10.1016/s0370-2693(01)00656-6
https://doi.org/10.1016/s0370-2693(01)00656-6
Publikováno v:
Physics Letters B. 503:271-276
A value for the η–η′ mixing angle is extracted from the data on VPγ transitions using simple quark-model ideas. The set of data covers all possible radiative transitions between the pseudoscalar and vector meson nonets. Two main ingredients of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95dadd7b1044b56e08c83ef3cffeeeac
https://doi.org/10.1016/s0370-2693(01)00161-7
https://doi.org/10.1016/s0370-2693(01)00161-7