Double spin asymmetry in exclusive rho0 muoproduction at COMPASS
Apr, 200715 pages
Published in:
- Eur.Phys.J.C 52 (2007) 255-265
e-Print:
- 0704.1863 [hep-ex]
Report number:
- CERN-PH-EP-2007-009
Experiments:
View in:
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Abstract: (arXiv)
The longitudinal double spin asymmetry A_1^rho for exclusive leptoproduction of rho^0 mesons, mu + N -> mu + N + rho, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive rho^0 production on polarised deuterons. The Q^2 and x dependence of A_1^rho is presented in a wide kinematical range: 3x10^-3 < Q^2 < 7 (GeV/c)^2 and 5x10^-5 < x < 0.05. The presented results are the first measurements of A_1^rho at small Q2 (Q2 < 0.1 (GeV/c)^2) and small x (x < 3x10^-3). The asymmetry is in general compatible with zero in the whole kinematical range.Note:
- 6 Figures, 15 pages
- 13.88.+e
- 13.60.Le
- muon deuteron: incoherent interaction
- deuteron: polarized target
- muon: polarized beam
- polarization: longitudinal
- diffraction
- rho(770)0: electroproduction
- spin: asymmetry
- x-dependence
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