skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Gaining analytical control of parton showers

Authors:
;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
926906
Report Number(s):
LBNL-63530
R&D Project: PTLDRD; BnR: YN0100000
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review D; Journal Volume: 76; Journal Issue: 11; Related Information: Journal Publication Date: 12/2007
Country of Publication:
United States
Language:
English
Subject:
72

Citation Formats

Bauer, Christian W., and Tackmann, Frank J. Gaining analytical control of parton showers. United States: N. p., 2007. Web. doi:10.1103/PhysRevD.76.114017.
Bauer, Christian W., & Tackmann, Frank J. Gaining analytical control of parton showers. United States. doi:10.1103/PhysRevD.76.114017.
Bauer, Christian W., and Tackmann, Frank J. Mon . "Gaining analytical control of parton showers". United States. doi:10.1103/PhysRevD.76.114017. https://www.osti.gov/servlets/purl/926906.
@article{osti_926906,
title = {Gaining analytical control of parton showers},
author = {Bauer, Christian W. and Tackmann, Frank J.},
abstractNote = {},
doi = {10.1103/PhysRevD.76.114017},
journal = {Physical Review D},
number = 11,
volume = 76,
place = {United States},
year = {Mon May 14 00:00:00 EDT 2007},
month = {Mon May 14 00:00:00 EDT 2007}
}
  • Parton showers are widely used to generate fully exclusive final states needed to compare theoretical models to experimental observations. While, in general, parton showers give a good description of the experimental data, the precise functional form of the probability distribution underlying the event generation is generally not known. The reason is that realistic parton showers are required to conserve four-momentum at each vertex. In this paper we investigate in detail how four-momentum conservation is enforced in a standard parton shower and why this destroysthe analytic control of the probability distribution. We show how to modify a parton shower algorithm suchmore » that it conserves four-momentum at each vertex, but for which the full analytic form of the probability distribution is known. We then comment how this analytic control can be used to match matrix element calculations with parton showers, and to estimate effects of power corrections and other uncertainties in parton showers.« less
  • Parton showers are widely used to generate fully exclusive final states needed to compare theoretical models to experimental observations. While, in general, parton showers give a good description of the experimental data, the precise functional form of the probability distribution underlying the event generation is generally not known. The reason is that realistic parton showers are required to conserve four-momentum at each vertex. In this paper we investigate in detail how four-momentum conservation is enforced in a standard parton shower and why this destroys the analytic control of the probability distribution. We show how to modify a parton shower algorithmmore » such that it conserves four-momentum at each vertex, but for which the full analytic form of the probability distribution is known. We then comment how this analytic control can be used to match matrix element calculations with parton showers, and to estimate effects of power corrections and other uncertainties in parton showers.« less
  • Price-performance improvements in computer-controlled oil and gas supervisory systems have been so remarkable within the past few years that such installations are now economical for virtually all new pipeline and gas utility installations. In addition to the much publicized price reductions and technical advances being made in digital computers adapted for real time industrial control, there have been parallel advances in secure digital telemetry and control methods designed to link hundreds of remote sensors and controllers to a master control station.
  • Its perhaps too easy to forget that Russia is still one country that could inflict overwhelming nuclear devastation on the United States. Russia`s Dumas elections and presidential elections speaks of changes in Russia, but this transformation will take many years and requires our consistent engagement and steady support. The author examines the Clinton Administration`s arms control agenda.