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Article
Report number arXiv:0907.0388 ; CERN-PH-EP-2009-011 ; CERN-PH-EP-2009-011
Title Measurement of the Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons in Polarised Muon DIS
Author(s) COMPASS collaboration  Show all 219 authors
Publication 2009
Imprint 03 Jul 2009
Number of pages 13
Note Comments: 13 pages, 7 figures
13 pages, 7 figures
In: Eur. Phys. J. C 64 (2009) 171-179
DOI 10.1140/epjc/s10052-009-1143-7
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; COMPASS NA58
Abstract The longitudinal polarisation transfer from muons to lambda and anti-lambda hyperons, D_LL, has been studied in deep inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to lambda and anti-lambda produced in the current fragmentation region exhibit different behaviours as a function of x and xF . The measured x and xF dependences of D^lambda_LL are compatible with zero, while D^anti-lambda_LL tends to increase with xF, reaching values of 0.4 - 0.5. The resulting average values are D^lambda_LL = -0.012 +- 0.047 +- 0.024 and D^anti-lambda_LL = 0.249 +- 0.056 +- 0.049. These results are discussed in the frame of recent model calculations.
Copyright/License Preprint: © 2009-2025 CERN (License: CC-BY-3.0)
Open Access

Corresponding record in: Inspire


 Record created 2009-07-03, last modified 2025-02-08


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