SPIN EFFECTS IN THE FRAGMENTATION OF TRANSVERSELY POLARIZED AND UNPOLARIZED QUARKS.
We study the fragmentation of a transversely polarized quark into a non-collinear (k{perpendicular} {ne} 0) spinless hadron and the fragmentation of an unpolarized quark into a non collinear transversely polarized spin 1/2 baryon. These nonperturbative properties are described by spin and k{perpendicular} dependent fragmentation functions and are revealed in the observation of single spin asymmetries. Recent data on the production of pions in polarized semi-inclusive DIS and long known data on A polarization in unpolarized p-N processes are considered: these new fragmentation functions can describe the experimental results and the single spin effects in the quark fragmentation turn out to be surprisingly large.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 780975
- Report Number(s):
- BNL-68244; KB0201; R&D Project: PO03; KB0201; TRN: US0102689
- Resource Relation:
- Conference: 14TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM, SPIN2000, OSAKA (JP), 10/16/2000--10/21/2000; Other Information: PBD: 23 Apr 2001
- Country of Publication:
- United States
- Language:
- English
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