Lambda Polarization in Peripheral Heavy Ion Collisions

Becattini, F and Csernai, László Pál and Wang, D. J. (2013) Lambda Polarization in Peripheral Heavy Ion Collisions. PHYSICAL REVIEW C, 88 (3). ISSN 2469-9985

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Abstract

We predict the polarization of Λ and ¯Λ hyperons in peripheral heavy ion collisions at ultrarela- tivistic energy, based on the assumption of local thermodynamical equilibrium at freeze-out. The polarization vector is proportional to the curl of the inverse temperature four-vector field and its length, of the order of percents, is maximal for particle with moderately high momentum lying on the reaction plane. A selective measurement of these particles could make Λ polarization detectable.

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