A search for pentaquark candidates in experiments WA89 and COMPASS

✍ Scribed by M. Zavertyev

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 251 KB
• Volume: 755
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2005.03.042

✦ Synopsis

We report on searches for the pentaquark candidates Θ + (1540) and Φ(1860) in Σ -nucleus collisions at 340 GeV/c (WA89) and in quasi-real photo-production in µ-6 LiD collisions at 160 GeV/c (COMPASS). No evidence for these candidates was found.

In Σ --nucleus collisions, the production cross section integrated over the range 0.15 < x F < 0.9 is σ < 16 µb/nucleon (95% CL) for the Θ + (1540) and σ • BR < 2.3 µb/nucleon (95% CL) for the Φ(1860).

In µ-6 LiD collisions, the ratio of Φ(1860) to Ξ -production is < 0.005 (99% CL). * Supported by DFG.