Event shapes in $e^+e^-$ annhilation at NNLO

Details Event shapes in $e^+e^-$ annhilation at NNLO Event shapes in $e^+e^-$ annhilation at NNLO

2008-01-17

arxiv.org/abs/0801.2680v1

PoS RADCOR2007:048,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, contribution to the Proceedings of RADCOR07, Florence

Scientific paper

We report first results on the calculation of NNLO corrections to event shape distributions in electron-positron annhilation. The corrections are sizeable for all variables, however their magnitude is substantially different for different observables. We observe that inclusion of the NNLO corrections yields a considerably better agreement between theory and experimental data both in shape and normalisation of the event shape distributions.

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