Color Octet Contribution in Exclusive P-Wave Charmonium Decay

Abstract

Recent advances in our understanding of the higher-wave quarkonia have generated much interests in quarkonium physics. However most are devoted to inclusive decays and productions. Experimental data of several two-body exclusive decay channels of P-wave charmonia such as ππand p \bar p are available and some have recently been re-measured by the BES collaboration. It is not clear from the outset that color octet is needed for these exclusive channels. Indeed only color singlet has been used in the past and reasonable agreement with data was found. Contrary to these old results, we provide theoretical arguments for the inclusion of color octet and perform explicit calculations to back this up.

6 pages using espcrc2.sty, contribution to the 4th Int. Conference on Hyperons, Charm and Beauty Hadrons, Valencia, June 2000

References in corpus (5)

• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons
• Colour-octet contributions to exclusive charmonium decays
• Study of the P-wave charmonium state χ_{cJ} in ψ(2S) decays
• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Proton-Antiproton
• Colour octet contribution to exclusive P-wave charmonium decay into nucleon-antinucleon

Cited by in corpus (2)

• Revisiting the $P$-wave charmonium radiative decays $h_c\to \gamma {\eta }^{(\prime )}$ with relativistic corrections
• QCD analysis of the $P$-wave charmonium electromagnetic Dalitz decays $h_c\to {\eta }^{(\prime )}{\ell }^{+}{\ell }^{-}$