Spin alignment of vector mesons produced in multihadronic Z0 decays

✍ Scribed by P.V. Chliapnikov

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 380 KB
• Volume: 71
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(98)00342-9

✦ Synopsis

DELPHI results on the spin density matrix analysis of the p0, K.O(892) and ¢ produced in Z ° hadronic decays at LEP are discussed. There is no spin alignment of the K*°(892) and ¢ in the region xp < 0.3 (xp = p/pb,a,.,,).

In the fragmentation region, the evidence is presented for noticeable spin alignment of the p0 K.0(892) and 4), with the diagonal matrix element p00 increasing with xp. The off-diagonal matrix element p1-1 is consistent with zero in all cases. These results are compared with those obtained by OPAL for the K*°(892) and ¢.