On gluon radiation in tt production and decay

Lynne H. Orr, T. Stelzer, W. J. Stirling

Research output: Contribution to journalArticlepeer-review


Understanding the pattern of gluon radiation in tt production processes is important for making an accurate determination of the top mass from the measurement of its decay products. In a recent paper we showed that the exact matrix element and parton shower (HERWIG) calculations gave very different results for the distribution of gluon jets in tt production at the Tevatron pp collider. By repeating the calculation for the simpler e+e- → bbW+W-g process, we reveal even more dramatic differences between the two approaches. We conclude that there are significant differences in gluon radiation between HERWIG and the matrix element calculation in regions of phase space where one would expect agreement.

Original languageEnglish (US)
Pages (from-to)442-446
Number of pages5
JournalPhysics Letters B
Issue number3-4
StatePublished - Jul 20 1995
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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