Feasibility studies of the time-like proton electromagnetic form factor measurements with $ \overline{{P}}$ ANDA at FAIR
European Physical Journal A(2010)
摘要
The possibility of measuring the proton electromagnetic form factors in the
time-like region at FAIR with the \PANDA detector is discussed. Detailed
simulations on signal efficiency for the annihilation of $\bar p +p $ into a
lepton pair as well as for the most important background channels have been
performed. It is shown that precision measurements of the differential cross
section of the reaction $\bar p +p \to e^++ e^-$ can be obtained in a wide
angular and kinematical range. The individual determination of the moduli of
the electric and magnetic proton form factors will be possible up to a value of
momentum transfer squared of $q^2\simeq 14$ (GeV/c)$^2$. The total $\bar p
+p\to e^++e^-$ cross section will be measured up to $q^2\simeq 28$ (GeV/c)$^2$.
The results obtained from simulated events are compared to the existing data.
Sensitivity to the two photons exchange mechanism is also investigated.
更多查看译文
关键词
Form Factor, Angular Distribution, Electromagnetic Calorimeter, Antiproton Beam, Straw Tube
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要