Single Spin Asymmetry of Vector Meson Production as a Probe of Asymmetry of Parton Scattering

Details Single Spin Asymmetry of Vector Meson Production as a Probe of Asymmetry of Parton Scattering Single Spin Asymmetry of Vector Meson Production as a Probe of Asymmetry of Parton Scattering

1994-08-24

arxiv.org/abs/hep-ph/9408361v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

plain TeX, 6 pages (revised version, 2 corrected figures added in a compressed uuencoded PostScript file), HEN-377 (1994)

Scientific paper

Azimuthal asymmetry of vector-meson production in single-transversely polarized proton-proton collisions ($p\up p$) is calculated in the string model of particle production. The asymmetry is generated only during fragmentation of a high-energy quark into hadrons. The obtained asymmetry of the $\rho^\pm$ is opposite in sign to that of $\pi^\pm$ mesons. On the other hand, an asymmetry appearing during parton scattering would contribute with the same sign to that of vector and pseudoscalar mesons. Thus, a combined measurement of both can be used to estimate the contribution to the asymmetry from parton scattering.

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