Bootstrapping Multi-Parton Loop Amplitudes in QCD Metadata

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Title

  • Main Title Bootstrapping Multi-Parton Loop Amplitudes in QCD

Creator

  • Author: Bern, Zvi
    Creator Type: Personal
    Creator Info: University of California, Los Angeles, CA, 90095, USA
  • Author: Dixon, Lance J.
    Creator Type: Personal
    Creator Info: Stanford Linear Accelerator Center, Menlo park, CA 94025, USA
  • Author: Kosower, David A.
    Creator Type: Personal
    Creator Info: IRFU/SACM, CEA-Saclay, F 91191, Gif-sur-Yvette, France

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization

Publisher

  • Name: Stanford Linear Accelerator Center
    Place of Publication: [Menlo Park, California]
    Additional Info: SLAC

Date

  • Creation: 2005-07-06

Language

  • English

Description

  • Content Description: The authors present a new method for computing complete one-loop amplitudes, including their rational parts, in non-supersymmetric gauge theory. This method merges the unitarity method with on-shell recursion relations. It systematizes a unitarity-factorization bootstrap approach previously applied by the authors to the one-loop amplitudes required for next-to-leading order QCD corrections to the processes e{sup +}e{sup -} {yields} Z, {gamma}* {yields} 4 jets and pp {yields} W + 2 jets. We illustrate the method by reproducing the one-loop color-ordered five-gluon helicity amplitudes in QCD that interfere with the tree amplitude, namely A{sub 5;1}(1{sup -}, 2{sup -}, 3{sup +}, 4{sup +}, 5{sup +}) and A{sub 5;1}(1{sup -}, 2{sup +}, 3{sup -}, 4{sup +}, 5{sup +}). Then we describe the construction of the six- and seven-gluon amplitudes with two adjacent negative-helicity gluons, A{sub 6;1}(1{sup -}, 2{sup -}, 3{sup +}, 4{sup +}, 5{sup +}, 6{sup +}) and A{sub 7;1}(1{sup -}, 2{sup -}, 3{sup +}, 4{sup +}, 5{sup +}, 6{sup +}, 7{sup +}), which uses the previously-computed logarithmic parts of the amplitudes as input. They present a compact expression for the six-gluon amplitude. No loop integrals are required to obtain the rational parts.
  • Physical Description: 40 pages

Subject

  • Keyword: Quantum Chromodynamics
  • Keyword: Amplitudes
  • Keyword: Gluons
  • Keyword: Unitarity Phenomenology-Hep,Hepph, Hepth, Math
  • Keyword: Trees
  • Keyword: Phenomenology-Hep,Hepph, Hepth, Math
  • STI Subject Categories: 71 Classical And Quantum Mechanics, General Physics
  • Keyword: Construction
  • Keyword: Recursion Relations
  • Keyword: Helicity
  • STI Subject Categories: 72 Physics Of Elementary Particles And Fields

Source

  • Journal Name: Physical Review, D (Particles Fields); Journal Volume: 73

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: SLAC-PUB-11315
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 878864
  • Archival Resource Key: ark:/67531/metadc877689

Note

  • Display Note: http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-11315.html
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