On gluon radiation in tt production and decay

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

doi:10.1016/0370-2693(95)00651-Z

On gluon radiation in tt production and decay

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

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English (US)
Pages (from-to)	442-446
Number of pages	5
Journal	Physics Letters B
Volume	354
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(95)00651-Z
State	Published - Jul 20 1995
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(95)00651-Z

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title = "On gluon radiation in tt production and decay",

abstract = "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.",

author = "Orr, {Lynne H.} and T. Stelzer and Stirling, {W. J.}",

note = "Funding Information: Two of us (T.S., W.J.S.) are grateful to the UK PPARC for financial support.U seful discussions with Nigel Glover, Michelangelo Mangano, StephenP arke and Bryan Webber are acknowledged.T his work was supportedi n part by the US Departmento f Energy, under grant DE-FG02-91ER40685 and by the EU Programme “Human Capital and Mobility”, Network “Physics at High Energy Colliders”, contractC HRX-CT93-0537 (DG 12 COMA).",

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AU - Orr, Lynne H.

AU - Stelzer, T.

AU - Stirling, W. J.

N1 - Funding Information: Two of us (T.S., W.J.S.) are grateful to the UK PPARC for financial support.U seful discussions with Nigel Glover, Michelangelo Mangano, StephenP arke and Bryan Webber are acknowledged.T his work was supportedi n part by the US Departmento f Energy, under grant DE-FG02-91ER40685 and by the EU Programme “Human Capital and Mobility”, Network “Physics at High Energy Colliders”, contractC HRX-CT93-0537 (DG 12 COMA).

PY - 1995/7/20

Y1 - 1995/7/20

N2 - 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.

AB - 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.

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On gluon radiation in tt production and decay

Abstract

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