Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-09-07
Phys.Lett.B659:127-136,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 10 eps figures; minor modifications, conclusions unchanged, version to be published
Scientific paper
10.1016/j.physletb.2007.10.059
We consider polarized Lambda hyperon production in proton-proton scattering, p p -> (\Lambda^\uparrow jet) jet X, in the kinematical region of the LHC experiments, in particular the ALICE experiment. We present a new Lambda polarization observable that arises from the Sivers effect in the fragmentation process. It can be large even at midrapidity and therefore, is of interest for high energy hadron collider experiments. Apart from its potential to shed light on the mechanisms behind the phenomenon of Lambda polarization arising in unpolarized hadronic collisions, the new observable in principle also allows to test the possible color flow dependence of single spin asymmetries and the (non)universality of transverse momentum dependent fragmentation functions.
Boer Daniel
Bomhof C. J.
Hwang Dae Sung
Mulders Piet J.
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