The exclusive reaction pp → Xc0(13P0) → π0π0 → γγγγ

✍ Scribed by Paolo Rumerio

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 599 KB
• Volume: 123
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)80326-2

✦ Synopsis

The Fermilab E835 Collaboration has studied Charmonium production using a gas jet hydrogen target, the virtually monoenergetic stochastically cooled antiproton beam and a large acceptance shower spectrometer. Until now our studies have featured electromagnetic final states, mostly the e+e-decay of J/t) or $', and yy decay of Q~, xco, or ~~2. For the first time in hadronic Charmonium production, hadronic annihilation channels have been clearly identified: x"?yo and ~17 at the xc0 resonance. This has required a parameterization of the non-resonant partially interfering final state channels. Our studies contribute to a clearer and improved understanding of the p@ annihilation process.