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20 papers · 2 filters
Exclusive photoproduction of on Proton in the quark-diquark model
C. Carimalo, N. Arteaga-Romero, S. Ong
We present predictions for the exclusive photoproduction of -meson on Proton at large tranfer, where we use a quark-diquark structure model for the proton. Extrapolation from ou…
Heavy-Flavour Pentaquarks in a Chiral Constituent Quark Model
M. Genovese, J. -M. Richard, FL. Stancu +1
Within the chiral constituent quark model of Glozman and Riska, we discuss the stability of heavy pentaquarks, i.e. hadrons containing four light quarks and a heavy antiquark. The…
Isospin Splittings of Baryons
K. Varga, M. Genovese, J. -M. Richard +1
We discuss the isospin-breaking mass differences among baryons, with particular attention in the charm sector to the , , and splittings…
Alternative Theories of CP violation
Riccardo Barbieri, Lawrence Hall, Achille Stocchi +1
Recent improvements to the limit of Delta M_{B_s} imply that pure superweak theories, while not excluded, no longer provide a good fit to the data. A class of general superweak the…
Improved Determination of alpha_QED(M_Z^2) and the Anomalous Magnetic Moment of the Muon
M. Davier, A. Hoecker
We reevaluate the hadronic contribution to the running of the QED fine structure constant alpha(s) at s = M_Z^2. We use data from e+e- annihilation and tau decays at low energy and…
Measurements of the and parameters of the matrix and perspectives
P. Paganini, F. Parodi, P. Roudeau +1
A review of the current status of the Cabibbo-Kobayashi-Maskawa matrix () is presented and a special emphasis is put on the determination of the and parameters. Fr…