ZFITTER: a semi-analytical program for fermion pair production in e+e- annihilation, from version 6.21 to version 6.42
ZFITTER: a semi-analytical program for fermion pair production in e+e- annihilation, from version 6.21 to version 6.42
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DOI：
10.1016/j.cpc.2005.12.009
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发表时间：
2005-07
期刊：
影响因子：
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通讯作者：
A. Arbuzov;M. Awramik;M. Czakon;A. Freitas;M. Grünewald;K. Mönig;S. Riemann;T. Riemann
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文献类型：
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作者：
A. Arbuzov;M. Awramik;M. Czakon;A. Freitas;M. Grünewald;K. Mönig;S. Riemann;T. Riemann
ZFITTER是一个Fortran程序，用于计算高能e+e−对撞机上的费米子对产生和辐射修正;它也适用于其他出现电弱辐射修正的应用。ZFITTER基于标准模型中辐射修正计算的半分析方法。我们提出的ZFITTER程序版本6.42相比，版本6.21的新功能的摘要。最重要的补充是：（i）对费米子对产生的高阶QED修正，（ii）对原子宇称破坏的电弱单圈修正，（iii）对玻色子产生的电弱单圈修正，（iv）对W玻色子质量和有效弱混合角的电弱双圈修正。摘要：程序标题：ZFITTER版本6.42（2005年5月18日）目录标识符：ADMJ_v2_0程序摘要URL：http://cpc.cs.qub.ac.uk/summaries/ADMJ_v2_0原程序作者：D. Bardin，P. Christova，M.杰克湖Kalinovskaya，A. Olshevski，S. Riemann，T.黎曼程序可从：CPC程序图书馆，贝尔法斯特女王大学，N。爱尔兰ZFITTER版本6.21的参考：D。Bardin等人，Comput. Phys.Comm.133（2001）229-395操作系统：UNIX/Linux，程序在例如使用的HP-UX和PC/Linux编程语言：FORTRAN 77所需高速存储：<2 MB分布式程序中的行数，包括测试数据等：29 164分布式程序字节数，包括测试数据等：185 824分发格式：tar.gz新版本是否取代以前的版本：是物理问题的性质：费米子对的产生是在LEP/SLC和未来更高能量的线性对撞机上对标准模型进行精确测试的重要反应。为此，必须高精度地计算QED、电弱和QCD辐射修正，包括高阶效应。多参数拟合用于从实验测量中提取模型参数，需要具有足够灵活性和高计算速度的程序。ZFITTER通过采用矩阵元素的解析积分和最多一维数值积分以及定义所用物理内容的各种标志来结合这两个方面。计算出的预测值通常达到千分之一的精度水平，有时甚至更高。求解方法：解析公式的数值积分。新版本的原因：在代码中添加实质性材料：涵盖更多反应;更准确地描述现有反应。修订摘要：预测原子宇称破坏和中微子对产生的新部分;费米子对产生的更精确的高阶QED修正;对W质量和弱混合角预测的双回路修正。对问题复杂性的限制：费米子对的产生被描述为低于顶夸克对的产生阈值。光子修正考虑到简单的削减光子能量，或两个费米子的能量和共线性，和一个费米子生产角。巴巴散射的处理不太先进。典型运行时间：在使用Linux 2.4.21下的g77的Pentium IV PC安装（2.8 GHz）上，运行子例程ZFTEST的标准测试大约需要23 s。该结果是针对输入参数的默认/推荐设置，标准模型中的所有校正都已打开。ZFTEST计算了8个能量和5个界面的12个截面和截面不对称性，即在23 s内计算了约360个截面。
ZFITTER is a Fortran program for the calculation of fermion pair production and radiative corrections at high energy e+e−colliders; it is also suitable for other applications where electroweak radiative corrections appear. ZFITTER is based on a semi-analytical approach to the calculation of radiative corrections in the Standard Model. We present a summary of new features of the ZFITTER program version 6.42 compared to version 6.21. The most important additions are: (i) some higher-order QED corrections to fermion pair production, (ii) electroweak one-loop corrections to atomic parity violation, (iii) electroweak one-loop corrections to ν¯eνeproduction, (iv) electroweak two-loop corrections to the W boson mass and the effective weak mixing angle. PROGRAM SUMMARY: Title of program:ZFITTER version 6.42 (18 May 2005) Catalogue identifier:ADMJ_v2_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADMJ_v2_0 Authors of original program: D. Bardin, P. Christova, M. Jack, L. Kalinovskaya, A. Olshevski, S. Riemann, T. Riemann Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Reference for ZFITTER version 6.21: D. Bardin et al., Comput. Phys. Comm. 133 (2001) 229–395 Operating system:UNIX/LINUX, program tested under, e.g., HP-UX and PC/Linux Programming language used:FORTRAN 77 High speed storage required: <2 MB No. of lines in distributed program, including test data, etc.:29 164 No. of bytes in distributed program, including test data, etc.:185 824 Distribution format:tar.gz Does the new version supersede the previous version:Yes Nature of the physical problem: Fermion pair production is an important reaction for precision tests of the Standard Model, at LEP/SLC and future linear colliders at higher energies. For this purpose, QED, electroweak and QCD radiative corrections have to be calculated with high precision, including higher order effects. Multi parameter fits used to extract model parameters from experimental measurements require a program of sufficient flexibility and high calculational speed. ZFITTER combines these two aspects by employing analytical integrations of matrix elements and at most one-dimensional numerical integration, as well as a variety of flags defining the physics content used. The calculated predictions are typically at the per mille precision level, sometimes better. Method of solution: Numerical integration of analytical formulae. Reasons for new version:Addition of substantial material into the code: covering of more reactions; more accurate description of existing reactions. Summary of revisions:New parts for predicting atomic parity violation and for neutrino pair production; more accurate higher order QED corrections for fermion pair production; two-loop corrections to the predictions of W mass and of the weak mixing angle. Restrictions on the complexity of the problem: Fermion pair production is described below the top quark pair production threshold. Photonic corrections are taken into account with simple cuts on photon energy, or the energies and acollinearity of the two fermions, and one fermion production angle. The treatment of Bhabha scattering is less advanced. Typical running time: On a Pentium IV PC installation (2.8 GHz) using g77 under Linux 2.4.21, approximately 23 s are needed to run the standard test of subroutine ZFTEST. This result is for a default/recommended setting of the input parameters, with all corrections in the Standard Model switched on. ZFTEST computes 12 cross-sections and cross-section asymmetries for 8 energies with 5 interfaces, i.e. about 360 cross-sections in 23 s.