期刊
PHYSICAL REVIEW D
卷 78, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.036003
关键词
-
资金
- U. S. Department of Energy [DE-FG03-91ER40662, DE-AC02-76SF00515]
- U. S. Department Energy (D.O.E.) [DE-FC02-94ER40818]
- National Science Foundation [PHY05-51164]
- Agence Nationale de la Recherce of France [ANR-05-BLAN-0073-01]
- Swiss National Science Foundation (SNF) [PBZH2-117028]
- STFC [ST/G000905/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G000905/1] Funding Source: researchfish
We present the first results from BLACKHAT, an automated C++ program for calculating one-loop amplitudes. The program implements the unitarity method and on-shell recursion to construct amplitudes. As input to the calculation, it uses compact analytic formulae for tree amplitudes for four-dimensional helicity states. The program performs all related computations numerically. We make use of recently developed on-shell methods for evaluating coefficients of loop integrals, introducing a discrete Fourier projection as a means of improving efficiency and numerical stability. We illustrate the numerical stability of our approach by computing and analyzing six-, seven-, and eight-gluon amplitudes in QCD and comparing against previously obtained analytic results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据