中文

在 $p_{lab}$=3.67 GeV/c 的 pp 反应中产生 $\phi$ 和 $\omega$ 介子

核实验 2008-11-26 v1

摘要

plab=3.67p_{lab}=3.67 GeV/c 的质子-质子反应中测量了 ω\omegaϕ\phi 介子的独占产生截面。观测到的 ϕ/ω\phi/\omega 截面比为 (3.8±0.20.9+1.2)×103(3.8\pm0.2^{+1.2}_{-0.9})\times 10^{-3}。经过相空间修正后,该比值相对于基于 Okubo-Zweig-Iizuka (OZI) 规则的朴素预言增强了约一个数量级,而先前在更高束流动量下观测到的增强因子约为 3。在产生阈值附近观察到的这种增强的适度增加,与在 pˉp\bar pp 湮灭实验的特定道中观测到的 ϕ/ω\phi/\omega 比值大得多的增加进行了比较。此外,还给出了微分截面结果,表明虽然 ϕ\phi 介子主要从 3P1^{3}P_1 质子-质子入射道产生,但其他分波对该束流动量下的产生机制也有显著贡献。

关键词

引用

@article{arxiv.nucl-ex/0011009,
  title  = {$\phi$ and $\omega$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c},
  author = {DISTO Collaboration and F. Balestra and Y. Bedfer and R. Bertini and L. C. Bland and A. Brenschede and F. Brochard and M. P. Bussa and Seonho Choi and M. Debowski and R. Dressler and M. Dzemidzic and J. -Cl. Faivre and I. V. Falomkin and L. Fava and L. Ferrero and J. Foryciarz and I. Froehlich and V. Frolov and R. Garfagnini and A. Grasso and E. Grosse and S. Heinz and V. V. Ivanov and W. W. Jacobs and W. Kuehn and A. Maggiora and M. Maggiora and A. Manara and D. Panzieri and H. -W. Pfaff and G. Piragino and G. B. Pontecorvo and A. Popov and J. Ritman and P. Salabura and V. Tchalyshev and F. Tosello and S. E. Vigdor and G. Zosi},
  journal= {arXiv preprint arXiv:nucl-ex/0011009},
  year   = {2008}
}

备注

Revtex 49 pages, 11 figures, Phys Rev C in print