Lambda polarization in unpolarized hadron reactions
  The transverse polarization observed in the inclusive production of Lambda hyperons in the high energy collisions of unpolarized hadrons is tackled by considering a new set of spin and kT dependent quark fragmentation functions. Simple phenomenological expressions for these new ``polarizing fragmentation functions'' are obtained by a fit of the data on Lambda's and Lambdabar's produced in p-N processes. 
M. Anselmino (1), D. Boer (2), U. D'Alesio (3) and F. Murgia (3) ((1)   University and INFN, Torino, Italy, (2) RIKEN-BNL Re...