Hadron Structure with String-Junction and Large Momentum Transfer Phenomena

概要

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When the baryon contains a junction of three strings, each having one urbaryon at the end, the junction is required to be represented by a conserved line in hadron reactions similarly to the urbaryon. Taking notice of the similarity, we propose a simple model to give the invariant amplitude at large momentum transfers, which is crossing symmetric. Every urbaryon and junction suffers an impact of large transferred momentum under the factorization assumption. Our model reproduces the behaviour of the electromagnetic form factor G_M〜(q^2)^<-1>, G_B〜(q^2)^<-2>, of the structure function νW_2^M〜(1-x)^1, νW_2^B〜(1-x)^3, and of the elastic differential cross section at fixed angles dσ/dt(MM)〜s^<-6>, dσ/dt(MB)〜s^<-8>, dσ/dt(BB, B^^-B)〜s^<-10>, where M and B respectively denote the meson and the baryon. Our results on elastic angular distribution, in particular the ratios at c.m.s. 90゜ of dσ/dt(K^+p)/dσ/dt(K^-p) and of dσ/dt(pp)/dσ/dt(p^^-p), are also satisfactory.
理論物理学刊行会の論文
1976-04-25