arXiv:hep-ph/0008186·v1·High Energy Physics — Phenomenology
Lambda polarization from unpolarized quark fragmentation
M. Anselmino (1)🇮🇹 · D. Boer (2)🇺🇸 · U. D'Alesio (3)🇮🇹 · F. Murgia (3) ((1) University and INFN, Torino, Italy, (2) RIKEN-BNL Research Center, (3) University and INFN, Cagliari, Italy)🇮🇹
Abstract
The longstanding problem of explaining the observed polarization of Lambda hyperons inclusively produced in the high energy collisions of unpolarized hadrons is tackled by considering spin and k_T dependent quark fragmentation functions. The data on Lambda's and Lambda-bar's produced in p-N processes are used to determine simple phenomenological expressions for these new "polarizing fragmentation functions", which describe the experiments remarkably well.
Comments: LaTeX, 21+1 pages, 6 eps figures, uses epsfig.sty