Speaker
Liliet Calero Diaz
(INFN Frascati)
Description
Measurements of transverse polarization of lambda hyperons produced in
high energy pp collisions may help to address several open issues about
lambda production and polarization mechanisms, such as the origin of
spontaneous lambda polarization. Its decay into a proton and a pion in a
parity violating weak decay enables the determination of the Λ hyperon
polarization by measuring the angular distribution of its decay
products. In order to correct for the acceptance and efficiency of the
detector MC data samples were also analyzed. The corrected longitudinal
and transverse polarization has been measured as function of pT and
pseudorapity in minimum bias events collected by the ALICE experiment at
sqrt(s) = 2.76, and 7 TeV pp collisions.
