标题： COMPASS中的横向物理 显示英文标题

标题： Transversity Physics at Compass

摘要： 横向自旋物理是CERN的COMPASS实验科学计划的重要组成部分，该实验自2002年开始收集数据，用160 GeV/c的μ子束流散射到极化的$^6$氘化锂靶上。 通过对正交于μ子束流方向的靶极化数据分析，首次测量了氘核的Collins和Sivers不对称性。 对于在半包容性深度非弹性散射中产生的正负强子，所测量的不对称性都很小，并且在误差范围内与零兼容：部分统计数据的结果已经发表。 正在研究双强子不对称性和从受击夸克传递的$\Lambda$极化，给出了2002年和2003年收集的数据的初步结果。 显示英文摘要

摘要： Transverse spin physics is an important part of the scientific programme of the COMPASS experiment at CERN, which started taking data in 2002, scattering 160 GeV/c muon beam on a polarized $^6$LiD target. The analysis of the data taken with the target polarized orthogonally to the muon beam direction has allowed to measure for the first time the Collins and Sivers asymmetries of the deuteron. Both for the positive and the negative hadrons produced in semi-inclusive DIS the measured asymmetries are small and, within errors, compatible with zero: results on part of the accumulated statistics have already been published. Two-hadron asymmetries and $\Lambda$ polarization transfered from the struck quark are also being investigated, and preliminary results on the data collected in the years 2002 and 2003 are given.