Production mechanism of heavy quarks for hadron - hadron and electron - positron collisisons

1.您的位置：知道173&gt;&gt; hadrons。在order to clarify reaction mechanisms of soft hadronic processes， we adopted the cascade model and the string model whose parameters were fixed from the comparison of the model predictions with data of &lt;e^+&gt; + &lt;e^-&gt; <Forward Arrow>hadrons。讨论质子的夸克结构，我们有两个视点<i>; （ ）三个独立的夸克和（ ）一个单一的夸克和一个二夸克<ii>。夸克（或夸克）的动量分布是以两个视点的基础形成的，然后对每个伪化模型的耦合。它发现了一个模型，可以用一个夸克描述完美地描述所有单个粒子的P+P <Forward Arrow>Hadron + X分布在360 GeV/c的情况下，在没有模型<X_F>的情况下从（费曼可变）分布特别是用于巴里昂生产的（费曼可变）分布在P+P <Forward Arrow><LAMBDA>+X， P+X， &lt;DELTA^（++）&gt; +X.2。EHS实验提供了我们的单个粒子分布在不同反应通道中。Charmed Particles D， &lt;D^&gt; +! were <LAMBDA_c>measured Proton-nucleus collisions， i. e. e. p+Al and p+Au were also observed and the results were compared with the multi-chain model.3。Construction of the luminosity monitor and development of track finding algorithm for the VENUS detector of TRISTAN。

1. Confirmation of a diquark and the construction of a quark - diquark model.In order to clarify reaction mechanisms of soft hadronic processes, we adopted the cascade model and the string model whose parameters were fixed from the comparison of the model predictions with data of <e^+> + <e^-> <Forward Arrow> hadrons. Concerning the quark structure of a proton, we assume two viewpoints ; ( <i> ) three independent quarks and ( <ii> ) a single quark and a diquark. The momentum distribution of the quark (or diquark) was formulated on the basis of two viewpoints and then coupled to each hadronization model. It was found that the model with the diquark could describe fairly well all single particle distributions of P+P <Forward Arrow> hadron + X at 360 GeV/c while the model without the diquark showed large deviation from the <X_F> (Feyman variable) distributions especially for the baryon production i.e. P+P <Forward Arrow> <LAMBDA> +X, P+X, <DELTA^(++)> +X.2. The EHS experiments has provided us single particle distributions of various reaction channels. The lifetimes of charmed particles D゜, <D^> +!- <> , <LAMBDA_c> were measured Proton - nucleus collisions, i. e. p+Al and p+Au were also observed and the results were compared with the multi - chain model.3. Construction of the luminosity monitor and development of track finding algorithm for the VENUS detector of TRISTAN.