PREPARATION STUDY FOR HADRON COLLIDER PHYSICS AT LHC

我们一直在寻找在高能强子对撞机中发现任何信号的可能性，这些信号表明了重要的最终状态，比如希格斯粒子。为了寻找希格斯粒子，我们发现我们的终端介子触发系统具有足够高的效率。另一方面，我们发现背景过程的贡献很大程度上依赖于它的建模。特别是在强子对撞机实验中最常见的小喷流事件中，isjet -simulato的模拟结果是DPMJET计算结果的200倍。这个测试是在我们感兴趣的伪快度（η）区域（比如|η|>1）进行的，以捕获μ子。其他地区也应进行类似的检测。我们可以用我们去年为此目的构建的系统进行这些计算，而不会遇到任何大麻烦。我们已经在atlas会议上展示了这些结果。我们目前的结论是继续这种方式，并比较QCD过程的模型。我们也将包括日本的NLO计算。我们还尝试了新开发的软件，称为面向对象软件。这将在实际实验中得到进一步的管理，因此这项工作是重要的。现在，我们正在核对以前的结果和新的结果。与旧版本保持一致很重要，但可靠性也很重要。

We have searched for possibilities to find any signals which indicate important final states at the high energy hadron collider, such as Higgs partiacels. To search for the Higgs particles, we have found that our endcap muon trigger system has sufficiently high efficiency. On the other hand, we have found the contribution from the back ground processes depend strongly on its modeling. Especially, in the mini-jet events, which is most popular at hadron collider experiments, our simulation according to ISAJET-simulato : shows 200 times more than that of DPMJET calculations. This test has been carried out at our interesting pseud-rapidity (η) region (say |η|>1) to catch muons. Similar tests should be done at other region. We could carried out those calculation with the system which we have constructed for this purpose last year without any major troubles. We have showed those results at the ATLAS-conferences. Our conclusion at this moment is to proceed this way and to compare the models on the QCD processes. We will include Japanese NLO calculations as well. We have also tried with newly developed software named Object Oriented software. This will be managed further in the real experiment, so that this work is important. At this time, we are checking our previous results and those given by the new one. It's Important to keep consistency with the old one but also reliability.