Baryon resonance analysis from MAID

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D. Drechsel, S.S. Kamalov and M. Vanderhaeghen. Baryon resonance analysis from MAID[J]. Chinese Physics C, 2009, 33(12): 1069-1076. doi: 10.1088/1674-1137/33/12/005
D. Drechsel, S.S. Kamalov and M. Vanderhaeghen. Baryon resonance analysis from MAID[J]. Chinese Physics C, 2009, 33(12): 1069-1076.  doi: 10.1088/1674-1137/33/12/005 shu
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Received: 2009-08-07
Revised: 1900-01-01
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Baryon resonance analysis from MAID

Abstract: 

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-Q2 and Q2 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 also π data on the neutron, also Q2 dependent neutron form factors are obtained. For all transition form factors we also give convenient numerical parameterizations that can be used in other reactions. Furthermore, we show how the transition form factors can be used to obtain empirical transverse charge densities and our first results are given for the Roper, the S11 and D13 resonances.

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