arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.5720hep-phnucl-th
收藏

$\bar p+p\to e^++e^-+ π^0$和$\bar p+p\to γ+ π^0$通过$ω$ -介子中间态的湮灭

Annihilation of $\bar p+p\to e^++e^-+ π^0$ and $\bar p+p\to γ+ π^0$ through $ω$-meson intermediate state

E. A. Kuraev, Yu. M. Bystritskiy, V. V. Bytev, A. Dbeyssi, E. Tomasi-Gustafsson

摘要:

研究了质子和反质子在s通道中湮灭为中性π介子和实或虚光子,随后发生轻子对发射的过程。当π介子在质心的$90^{\circ}$周围发射时,这种机制预计在总能量$\sqrt{s}$的中等值下发挥作用。考虑到散射和湮灭通道,获得与现有数据的公平比较。在FAIR的PANDA实验所能达到的运动学范围内计算了它的截面,并给出了数值结果。

英文摘要:

The s-channel annihilation of proton and antiproton into a neutral pion and a real or virtual photon followed by lepton pair emission is studied. Such mechanism is expected to play a role at moderate values of the total energy $\sqrt{s}$, when the pion is emitted around $90^{\circ}$ in the center of mass. A fair comparison with the existing data is obtained taking into account scattering and annihilation channels. The cross section is calculated and numerical results are given in the kinematical range accessible in the PANDA experiment at FAIR.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑