Longitudinal spin transfer to Λ and Λ¯ hyperons in polarized proton-proton collisions at s√=200  GeV

Abelev, B. I. and Planinić, Mirko and Poljak, Nikola and Zoulkarneeva, Y. (STAR Collaboration) (2009) Longitudinal spin transfer to Λ and Λ¯ hyperons in polarized proton-proton collisions at s√=200  GeV. Physical Review D, 80 (11). 111102(R)-7. ISSN 1550-7998

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Abstract

The longitudinal spin transfer, DLL, from high energy polarized protons to Λ and Λ¯ hyperons has been measured for the first time in proton-proton collisions at √s=200  GeV with the STAR detector at the Relativistic Heavy Ion Collider. The measurements cover pseudorapidity, η, in the range |η|<1.2 and transverse momenta, pT, up to 4  GeV/c. The longitudinal spin transfer is found to be DLL=−0.03±0.13(stat)±0.04(syst) for inclusive Λ and DLL=−0.12±0.08(stat)±0.03(syst) for inclusive Λ¯ hyperons with <η>=0.5 and <pT>=3.7  GeV/c. The dependence on η and pT is presented.

Item Type: Article
Keywords: longitudinal, spin, polarized
Date: December 2009
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 10 Jun 2014 10:12
Last Modified: 10 Jun 2014 10:13
URI: http://digre.pmf.unizg.hr/id/eprint/2323

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