Productions of X(1835) as baryonium with sizable gluon content
Abstrak
Abstract.X(1835) has been treated as a baryonium with sizable gluon content, and to be almost flavor singlet. This picture allows us to rationally understand X(1835) production in J/ψ radiative decays, and its large couplings with p¯, η′ππ. The processes ϒ(1S) → γX(1835) and J/ψ → ωX(1835) have been examined. It has been found that Br(ϒ(1S) → γX(1835))Br(X(1835) → p¯) < 6.45×10-7, which is compatible with CLEO's recent experimental result (Phys. Rev. D 73, 032001 (2006) hep-ex/0510015). The branching fractions Br(J/ψ → ωX(1835)), Br(J/ψ → ρX(1835)) with X(1835) → p¯ and X(1835) → η′π+π- have been estimated by the quark-pair creation model. We show that they are heavily suppressed, so the signal of X(1835) is very difficult, if not impossible, to be observed in these processes. The experimental checks for these estimations are expected. The existence of the baryonium nonet is conjectured, and a model-independent derivation of their production branching fractions is presented.
Topik & Kata Kunci
Penulis (3)
Gui-Jun Ding
R. Ping
M. Yan
Akses Cepat
- Tahun Terbit
- 2005
- Bahasa
- en
- Total Sitasi
- 14×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1140/epja/i2006-10055-3
- Akses
- Open Access ✓