Automodellism in the large-angle elastic scattering and structure of hadrons
Automodellism in the large-angle elastic scattering and structure of hadrons
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DOI：
10.1007/bf02728133
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发表时间：
1973-08
期刊：
影响因子：
--
通讯作者：
V. A. Matveev;R. Muradyan;A. Tavkhelidze
中科院分区：
文献类型：
--
作者：
V. A. Matveev;R. Muradyan;A. Tavkhelidze
在研究弹性强子碰撞过程中，目前一个重要的问题是研究大动量转移的反应。相应的运动学区域是--t，S-+co在t/S是固定的，或者，由于公式COS0==1W-2t/S，质心系统中的大角度散射区。对这些过程的兴趣是由于目前在新加速器上获得拉戈动量转移的实验可能性(1)。另一方面，有一些理论认为，大动量转移时的相互作用机制与决定小动量转移区域的相互作用机制有本质的不同。通常的观点是，小t的弹性碰撞是由强子的整体结构决定的，例如，与微分截面的斜率参数有关的1Fm量级的有效相互作用半径。在具有极大动量的弹性碰撞中，很自然地期望传递一个内部的局部强子结构，正如目前假设的那样，它具有(~Hard，或(~Pointlike~))特征，变得更加重要。在本文中，我们想指出在大动量转移的弹性散射的纯强子作用中揭示强子的局域或点的Hke结构的可能性。在夸克模型的框架下，利用自模原理，证明了在-t极限下，S在t/S确定了表1中弹性强子-强子和电子-h-强子反应微分截面的自模渐近关系。在两粒子碰撞的一般情况下，大角度弹性海浪的微分截面具有渐近性
1,-In studying the processes of elastic hadron collisions one of the important problems now is the investigation of reactions with large momentum transfers. The corresponding kinematic region is--t, s-+ co at t/s fixed, or, due to the formula cos0== 1 W-2t/s, the region of large-angle scattering in the centre-of-mass system. Interest in these processes is due to the present experimental possibilities of getting largo momentum transfers on new accelerators (1). 0n the other hand, there are some theoretical arguments to expect that the interaction mechanism at large momentum transfers differs essentially from that one which determines the region of small momentum transfers.The usual opinion is that the elastic collisions with small t are determined by a global structure of hadrons like, for example, the effective radius of interaction of the order of 1 fm which is related to the slope parameter of the differential cross-section. It is natural to expect that in elastic collisions with extremely large momentum transfers an inner local structme of hadrons, which as is presently assumed has a (~ hard, or (~ pointlike~ character, becomes more important. In this paper we should like to point to the possibility of revealing a local or pointHke structure of hadrons in pure hadronie~ eactions of elastic scattering at large momentum transfers. In the framework of the quark model by using the principle of automodellism (~) it is shown that in the limit--t, s--> oo at t/s fixed the automodel asymptotic relations for the differential cross-sections of elastic hadron-hadron and electron-h~ dron reactions of Table I hold. In the general case of two-particle collisions the differential cross-section of largeangle elastic sea% ering has the asymptotics