Direct Measurement of the Gluon Polarisation in the Nucleon via Charmed Meson Production

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We present the first measurement of the gluon polarisation in the nucleon based on the photon-gluon fusion process tagged by charmed meson production and decay to charged K and pi. The data were collected in polarised muon scattering off a polarised deuteron target by the COMPASS collaboration at CERN during 2002-2004. The result of this LO analysis is <Delta g/g>_x = -0.47 +- 0.44 (stat) +- 0.15 (syst) at <x> ~= 0.11 and a scale mu^2 ~ 13 (GeV/c)^2.
7 pages, 3 figures

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High Energy Physics - Experiment

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http://salesiana.dossiersoluciones.com/handle/123456789/155321

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0802.3023
 http://arxiv.org/abs/0802.3023

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arXiv