Unitary isobar model --MAID2007
نویسندگان
چکیده
منابع مشابه
Unitary Isobar Model - MAID 2007
The unitary isobar model MAID2007 has been developed to analyze the world data of pion photo-and electroproduction. The model contains both a common background and several resonance terms. The background is unitarized according to the K-matrix prescription, and the 13 four-star resonances with masses below 2 GeV are described by appropriately unitarized Breit-Wigner forms. The data have been an...
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The unitary isobar model MAID2007 has been used to analyze the recent data of pion electroproduction. The model contains all four-star resonances in the region below W =2 GeV and both single-Q and Q dependent transition form factors could be obtained for the Delta, Roper, D13(1520), S11(1535), S31(1620), S11(1650), D15(1675), F15(1680) and P13(1720). From the complete world data base, including...
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The four-nucleon bound state and scattering below three-body breakup threshold are described based on the realistic coupledchannel potential CD Bonn + ∆ which allows the excitation of a single nucleon to a ∆ isobar. The Coulomb repulsion between protons is included. In the four-nucleon system the two-baryon coupled-channel potential yields effective two-, threeand fournucleon forces, mediated b...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2007
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2007-10490-6