Quick Search:
Prog. Theor. Phys. Vol. 101 No. 2 (1999) pp. 359-371
Quark Distributions in the Nucleon by the Semi-Inclusive Reaction on the Proton and Helium-3 Target
Hisashi Kitagawa1, *) and
Yasuhiro Sakemi2
1 Department of Physics, Tokyo Metropolitan University,
Hachioji 192-0397, Japan
and
Radiation Laboratory, RIKEN,
2–1 Wako 351-0198, Japan
2Deptartment of Physics, Tokyo Institute of Technology,
O-okayama
Tokyo 152-8551, Japan
(Received June 26, 1998; Revised November 9, 1998)
Abstract:
We investigate the spin asymmetries which will be measured by
semi-inclusive reactions on proton targets and helium-3 targets
with tagged charged pions and kaons.
By using the quark parton model, we relate the spin asymmetries to the
quark spin distributions in the nucleon.
We also use the parametrized fragmentation functions and
the existing parametrizations of
polarized and unpolarized quark distributions.
Then we predict the spin asymmetries.
We show that we can study the quark distributions in the neutron with the
helium-3 target.
We find useful properties for experimental analysis:
The spin asymmetry changes little if kaons are taken into account,
and it is almost independent of the z-cut.
URL :
http://ptp.ipap.jp/link?PTP/101/359/
DOI : 10.1143/PTP.101.359
References:
- R. G. Roberts, The Structure of the Proton, Deep Inelastic Scattering (Cambridge Universtity Press, 1990).
- L. L. Frankfurt, M. I. Strikman, L. Mankiewicz, A. Schäfer, E. Rondio, A. Sandacz and V. Papavassiliou, Phys. Lett. 230B (1989), 141.
-
F. E. Close and R. G. Milner, Phys. Rev. D44 (1991), 3691[APS].
-
St. Güllenstern, M. Veltri, P. Górnicki, L. Mankiewicz and A. Schäfer, Phys. Lett. B312 (1993), 166[Elsevier].
-
EM Collab., M. Arneodo et al., Nucl. Phys. B321 (1989), 541[Elsevier].
- J. Binnewies, B. A. Kniehl and G. Kramer, Z. Phys. C65 (1995), 471.
-
H. L. Lai, J. Huston, S. Kuhlmann, F. Olness, J. Owens, D. Soper, W. K. Tung and H. Weerts, Phys. Rev. D55 (1997), 1280[APS].
-
T. Gehrmann and W. J. Stirling, Phys. Rev. D53 (1996), 6100[APS].
- M. Miyama and S. Kumano, Comput. Phys. Commun. 94 (1996), 185.
- M. Hirai, S. Kumano and M. Miyama, Comput. Phys. Commun. 108 (1998), 38.
-
R. Jakob, P. J. Mulders and J. Rodrigues, Nucl. Phys. A626 (1997), 937[Elsevier].
