Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8194338 | Physics Letters B | 2010 | 5 Pages |
Abstract
The spin alignment matrix element Ï00 for the vector mesons Kâ0 and Ï(1020) has been measured in RHIC at central rapidities. These measurements are consistent with the absence of polarization with respect to the reaction plane in mid-central Au+Au collisions whereas, when measured with respect to the production plane in the same reactions and in p+p collisions, a non-vanishing and pâ¥-dependent Ï00 is found. We show that this behavior can be understood in a simple model of vector meson production where the spin of their constituent quarks is oriented during hadronization as the result of Thomas precession.
Related Topics
Physical Sciences and Engineering
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Authors
Alejandro Ayala, Eleazar Cuautle, G. Herrera Corral, J. Magnin, Luis Manuel Montaño,