Inclusive and semi-inclusive analysis from polarised deep-inelastic muon scattering

✍ Scribed by T. Kageya

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 193 KB
• Volume: 654
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)88504-8

✦ Synopsis

We present new results for the spin-dependent structure function on the proton and for the polarised quark distributions in the nucleon from semi-inclusive spin asymmetries. With the inclusive asymmetry from deep inelastic scattering of polarised muons on polarised protons, it is found that the Ellis-Jaffe sume rule is violated. Using our results for F d, the Bjorken sum rule is confirmed with an accuracy of about 15 %. From semi-inclusive spin asymmetries and SMC inclusive spin asymmetries, we determine the polarised quark distributions of valence u and d quarks to be positive and negative, respectively, while the non-strange sea distribution to be consistent with zero.