Diffractive N^* Productions in the Quark Model
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概要
- 論文の詳細を見る
Diffractive Productions of N^* with I=1/2 are investigated on the basis of a quark model with a relativistic extended internal structure. Momentum transfer dependences of differential cross sections (dσ/dt) at low momentum transfers are consistently reproduced. At high momentum transfers the experimental relations [numerical formula] are also satisfied, where X=π and p. As for the absolute value of dσ/dt, we can get consistent values for N^*_<15>(1688), but values smaller than the experimental ones are given for N^*_<11>(1470) and N^*_<13>(1525). The so-called s-channel helicity conservation can be predicted for the elastic scattering and forward production processes of N^* belonging to the 56-dimensional representation {56} of the SU(6) symmetry. On the other hand for N^* in the {70} it is not true. Morrison's rule for diffractive scattering, that is, the relation (-1)^<Jf-Ji>=P_i・P_f is shown to be broken in our model. It is also pointed out that the ratios of the helicity flip amplitudes to the helicity non-flip ones |F_<+->/F_<++>| are an interesting test for determining the spin-unitary spin structures of N^*.
- 理論物理学刊行会の論文
- 1972-11-25
著者
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Kobayashi Tsunehiro
Department Of Physics Tokyo University Of Education
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NAKAMARU Nobuyuki
Department of Physics, Tokyo University of Education
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SAITO Kikuo
Department of Physics, Tokyo University of Education
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Kobayashi Tsunehiro
Department Of Physics Tokyo University
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Saito Kikuo
Department Of Physics Tokyo University Of Education
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Nakamaru Nobuyuki
Department Of Physics Tokyo University Of Education
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KOBAYASHI Tsunehiro
Department of Physics, Tokyo University of Education
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Kobayahi Tsunehiro
Department of Physics, Tokyo University of Education
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