We present a new measurement of the longitudinal spin asymmetry A_1^d and the spin-dependent structure function g_1^d of the deuteron in the range 1 GeV^2 < Q^2 < 100 GeV^2 and 0.004< x <0.7. The data were obtained by the COMPASS experiment at CERN using a 160 GeV polarised muon beam and a large polarised 6-LiD target. The results are in agreement with those from previous experiments and improve considerably the statistical accuracy in the region 0.004 < x < 0.03.
Measurement of the spin structure of the deuteron in the DIS region
AMOROSO, Antonio;BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;BUSSA, Maria Pia;COSTA, Sergio;FERRERO, Andrea;FERRERO, Livio;FROLOV, VLADIMIR;GARFAGNINI, Raffaello;GRASSO, Antonino;KOTZINIAN, Aram;MAGGIORA, MARCO;PANZIERI, Daniele;PIRAGINO, Guido;
2005-01-01
Abstract
We present a new measurement of the longitudinal spin asymmetry A_1^d and the spin-dependent structure function g_1^d of the deuteron in the range 1 GeV^2 < Q^2 < 100 GeV^2 and 0.004< x <0.7. The data were obtained by the COMPASS experiment at CERN using a 160 GeV polarised muon beam and a large polarised 6-LiD target. The results are in agreement with those from previous experiments and improve considerably the statistical accuracy in the region 0.004 < x < 0.03.
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