ALPGEN, a generator for hard multiparton processes in hadronic collisions
ALPGEN, a generator for hard multiparton processes in hadronic collisions
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DOI：
10.1088/1126-6708/2003/07/001
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发表时间：
2003-07-01
影响因子：
5.4
通讯作者：
Pittau, R
中科院分区：
文献类型：
--
作者：
Mangano, ML;Piccinini, F;Pittau, R
本文介绍了一种新的事件发生器ALPGEN，它致力于强子碰撞中多部分子硬过程的研究。该代码执行，在QCD和EW相互作用的领导秩序，在Tevatron和LHC数据的研究中感兴趣的一个大的部分子级过程的精确矩阵元素的计算。当前版本的代码描述了以下最终状态：（W --> f（f）在杆上）Q（Q）在杆上+ N个喷嘴（Q是重夸克，并且f = l，q），其中N小于或等于4;（Z/gamma* --> f（f）over bar）Q（Q）over bar + N喷嘴（f = l，nu），其中N小于或等于4;（W --> f（f）over bar '）+ charm + N jets（f = l，q，N小于或等于5）;（W --> f（f）在杆上）+ N个射流（f = l，q）且（Z/gamma* --> f（f）over bar）+ N个喷嘴（f = l，nu），其中N小于或等于6; nW + mZ + lH + N喷注，其中n + m + l + N小于或等于8，N小于或等于3，包括W和Z玻色子的所有2-费米子衰变模式，具有自旋关联; Q（Q）在bar + N喷注上，t --> bf（f）在bar'衰变上，相关时包括相对自旋关联，N小于或等于6; Q（Q）在bar' + N喷注上，Q和Q'重夸克（可能相等）和N小于或等于4;在棒+ N喷流上的HQ（Q），其中在棒'衰变和相关的地方包括相对自旋相关性和N小于或等于4; N喷流，其中N小于或等于6。产生了部分子级事件，提供了关于它们的颜色和味道结构的全部信息，使部分子能够演化成完全强子化的最终状态。
This paper presents a new event generator, ALPGEN, dedicated to the study of multiparton hard processes in hadronic collisions. The code performs, at the leading order in QCD and EW interactions, the calculation of the exact matrix elements for a large set of parton-level processes of interest in the study of the Tevatron and LHC data. The current version of the code describes the following final states: (W --> f (f) over bar')Q (Q) over bar + N jets (Q being a heavy quark, and f = l, q), with N less than or equal to 4; (Z/gamma* --> f (f) over bar )Q (Q) over bar + N jets (f = l, nu), with N less than or equal to 4; (W --> f (f) over bar') + charm + N jets (f = l, q, N less than or equal to 5); (W --> f (f) over bar') + N jets (f = l, q) and (Z/gamma* --> f (f) over bar) + N jets (f = l, nu), with N less than or equal to 6; nW + mZ + lH + N jets, with n + m + l + N less than or equal to 8, N less than or equal to 3, including all 2-fermion decay modes of W and Z bosons, with spin correlations; Q (Q) over bar + N jets, with t --> bf (f) over bar' decays and relative spin correlations included where relevant, and N less than or equal to 6; Q (Q) over barQ'(Q) over bar' + N jets, with Q and Q' heavy quarks (possibly equal) and N less than or equal to 4; HQ (Q) over bar + N jets, with t --> bf (f) over bar' decays and relative spin correlations included where relevant and N less than or equal to 4; N jets, with N less than or equal to 6. Parton-level events are generated, providing full information on their colour and flavour structure, enabling the evolution of the partons into fully hadronised final states.