Open AccessΛ Polarization with a Transversely Polarized Proton Target at the COMPASS Experiment
Author(s) -
T. Negrini,
Donald G. Crabb,
Yelena Prok,
Matt Poelker,
Simonetta Liuti,
Donal B. Day,
Xiaochao Zheng
Publication year - 2009
Publication title -
aip conference proceedings
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.177
H-Index - 75
eISSN - 1551-7616
pISSN - 0094-243X
DOI - 10.1063/1.3215731
Subject(s) - compass , physics , polarization (electrochemistry) , muon , transverse plane , large hadron collider , hyperon , nuclear physics , scattering , deep inelastic scattering , particle physics , nucleon , optics , inelastic scattering , chemistry , engineering , quantum mechanics , structural engineering
The transverse polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons is investigated at the COMPASS experiment at CERN. In 2007 a 160 GeV/c longitudinally polarized muon beam and a transversely polarized $NH_{3}$ target was employed to study events in semi-inclusive deep-inelastic scattering. Preliminary results for the $\Lambda$ and $\bar{\Lambda}$ polarizations extracted from this new data set are presented as a function of $x_{Bj}$ and $z$. The polarizations of $\Lambda$ and $\bar{\Lambda}$ are compatible with zero within their error bars and are thus unpolarized and with no dependence on $x_{Bj}$ or $z$
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