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Prog. Theor. Phys. Vol. 107 No. 6 (2002) pp. 1163-1190
Properties of Three-Body Decay Functions Derived with Time-Like Jet Calculus beyond Leading Order
Tetsuya Sugiura*
Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
(Received December 7, 2001)
Abstract:
Three-body decay functions in time-like parton branching are calculated
using the jet calculus to the next-to-leading logarithmic (NLL) order in
perturbative quantum chromodynamics (QCD). The phase space contributions from
each of the ladder diagrams and interference diagrams are presented. We correct
part of the results for the three-body decay functions calculated previously by
two groups. Employing our new results, the properties of the three-body decay
functions in the regions of soft partons are examined numerically. Furthermore,
we examine the contribution of the three-body decay functions modified by the
restriction resulting from the kinematical boundary of the phase space for
two-body decay in the parton shower model. This restriction leads to some
problems for the parton shower model. For this reason, we propose a new
restriction introduced by the kinematical boundary of the phase space for
two-body decay.
URL :
http://ptp.ipap.jp/link?PTP/107/1163/
DOI : 10.1143/PTP.107.1163
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Citing Article(s) :
-
Progress of Theoretical Physics Vol. 109 No. 6 (2003) pp. 981-993
:
-
Space-Like Jet Calculus for Single Gluon Radiating Processes
-
Hidekazu Tanaka, Tetsuya Sugiura, Tomo Munehisa and Kiyoshi Kato
