期刊
PHYSICS LETTERS B
卷 663, 期 3, 页码 209-213出版社
ELSEVIER
DOI: 10.1016/j.physletb.2008.04.007
关键词
quantum electrodynamics; flavour factories; luminosity; photon pair; radiative corrections; parton shower
We present a high-precision QED calculation, with 0.1% theoretical accuracy, of two photon production in e(+)e(-) annihilation, as required by more and more accurate luminosity monitoring at flavour factories. The accuracy of the approach, which is based on the matching of exact next-to-leading order corrections with a QED Parton Shower algorithm, is demonstrated through a detailed analysis of the impact of the various sources of radiative corrections to the experimentally relevant observables. The calculation is implemented in the latest version of the event generator BabaYaga, available for precision simulations of photon pair production at e(+)e(-) colliders of moderately high energies. (C) 2008 Elsevier B.V. All rights reserved.
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