Feasibility studies of the time-like proton electromagnetic form factor measurements with PANDA at FAIR
M. Sudol, M. C. Mora Espi, E. Becheva, J. Boucher, T. Hennino, R. Kunne, D. Marchand, S. Ong, B. Ramstein, J. Van de Wiele, T. Zerguerras, F. Maas, B. Kopf, M. … 展开作者
M. Sudol, M. C. Mora Espi, E. Becheva, J. Boucher, T. Hennino, R. Kunne, D. Marchand, S. Ong, B. Ramstein, J. Van de Wiele, T. Zerguerras, F. Maas, B. Kopf, M. Pelizaeus, M. Steinke, J. Zhong, E. Tomasi-Gustafsson
讨论了用\PANDA探测器在FAIR上测量类时区质子电磁形状因子的可能性。详细模拟了$\bar p +p $湮灭为轻子对以及最重要的背景通道的信号效率。它表明,反应$\bar p +p \to e^++ e^-$的微分截面的精确测量,可以得到在一个广泛的角度和运动学范围。电和磁质子形状因子的模量的单独确定将是可能的,直到$q^2\simeq 14$(GeV/c)$^2$的动量传递平方值。测量总$\bar p +p\to e^++e^-$横截面,直至达到$q^2\simeq 28$(GeV/c)$^2$。从模拟事件得到的结果进行比较,现有的数据。还研究了双光子交换机制的灵敏度。
英文摘要:
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.
Application of the time-dependent charge asymmetry method for longitudinal position determination in prototype proportional chambers for the PANDA experiment
Novel physics opportunities at the HESR-Collider with PANDA at FAIR
在欧洲反质子和离子研究设施(FAIR)的重新定义的$\bar{\text{p}} \text{p}(A)$对撞机模式HESR-C中,高能储存环上的PANDA探测器面临着令人兴奋的新的科学机会。高亮度,$L \sim 10^{31}$ cm $^{-2}$ s $^{-1}$,以及宽范围的中高能,$\sqrt{s_{\text{NN}}}$高达30 GeV的$\bar{\text{p}} \text{p}(A)$碰撞将允许探索QCD中广泛的令人兴奋的主题,包括研究激发的开放魅力和底态,包含重(反)夸克的核束缚态的产生,双轻子产生中硬和软物理的相互作用,以及探索胶子--而不是夸克--经历强相互作用的机制。
Feasibility studies of time-like proton electromagnetic form factors at PANDA at FAIR
在PandaRoot软件框架内的\PANDA(FAIR)的电磁质子形状因子的未来测量的模拟结果的报告。估计了质子形状因子的统计精度。信号通道$\bar p p \to e^+ e^-$是在两个不同但一致的过程的基础上研究的。研究了主背景通道$\textit{i.e.}$ $\bar p p \to π^+ π^-$的抑制。此外,背景与信号效率,统计和系统的不确定性上提取的质子形状因子使用两种不同的程序进行评估。结果是一致的,与以前的模拟研究,使用一个旧的,简化的框架。然而,在PandaRoot研究中,假设标称光束条件和探测器性能,在大范围的动量传递中实现了稍好的精度。