Semi-inclusive radiative decays of Upsilon 1S

Details Semi-inclusive radiative decays of Upsilon 1S Semi-inclusive radiative decays of Upsilon 1S

2005-07-08

arxiv.org/abs/hep-ph/0507107v2

Phys.Rev. D72 (2005) 054014

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures. Minor modifications. References added and corrected. Journal version

Scientific paper

We discuss in detail the photon spectrum of radiative Upsilon 1S decays taking into account a number of results that have recently appeared in the literature. In particular, we show how to consistently combine expressions which are valid in the upper end-point region, where NRQCD factorization breaks down, with those of the central region, where NRQCD factorization holds. An excellent description of data is achieved, but theoretical errors are large.

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