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 . 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 D g g E x = −0.47 ± 0.44(stat) ± 0.15(syst) at hxi ≈ 0.11 and a scale μ2 ≈ 13 (GeV/c)2.

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

M. Alekseev;AMOROSO, Antonio;BALESTRA, Ferruccio;M. P. Bussa;CHIOSSO, Michela;FERRERO, Livio;MAGGIORA, MARCO;PIRAGINO, Guido;SOSIO, Stefano;
2008-01-01

Abstract

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 . 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 D g g E x = −0.47 ± 0.44(stat) ± 0.15(syst) at hxi ≈ 0.11 and a scale μ2 ≈ 13 (GeV/c)2.
2008
M. Alekseev; V.Yu. Alexakhin8); Yu. Alexandrov18); G.D. Alexeev8); A. Amoroso; A. Arbuzov8); B. Bade lek33); F. Balestra; J. Ball25); J. Barth4); G. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/67131
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