Longitudinal Spin Transfer to Λ and Λ in Polarized Proton-Proton Collisions at √(s) = 200 Gev at Star

2009/12/17 by Xu, Qing-hua
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.0912.3353

Abstract

We report our measurement on longitudinal spin transfer, D_LL, from high energy polarized protons to Λ and Λ hyperons in proton-proton collisions at √(s) = 200GeV with the STAR detector at RHIC. The measurements cover Λ, Λ pseudorapidity |η| < 1.2 and transverse momenta p_T up to 4GeV/c. The longitudinal spin transfer is found to be D_LL= -0.03± 0.13(stat) ± 0.04(syst) for inclusive Λ and D_LL = -0.12 ± 0.08(stat) ± 0.03(syst) for inclusive Λ hyperons with = 0.5 and = 3.7GeV/c. The prospect on transverse spin transfer measurement is also given.

Related

• Longitudinal and transverse spin transfer to Λ and Λ hyperons in p+p collisions at STAR
• Longitudinal and Transverse Spin Transfer of Λ and Λ Hyperons in Polarized p+p Collisions at √(s) = 200 GeV at RHIC-STAR
• Longitudinal Spin Transfer to Λ Hyperons in Semi-Inclusive Deep Inelastic Scattering with CLAS12
• Recent Results in Polarized Proton-Proton Elastic Scattering at STAR
• Longitudinal Spin Measurements with Inclusive Hadrons in Polarized p+p\n Collisions at 200 GeV