arXiv 1409.55772014-09-19physics.acc-phhep-exphysics.ins-det

高能光子对撞机的能量定标

Energy calibration at high-energy photon colliders

V. I. Telnov

备注：: 8 pages, 3 figures, Latex. Talk at Int. conf. on instrumentation for colliding beam physics (INSTR 2014), Feb. 24 - March 1, 2014, BINP, Novosibirsk. To be published in JINST
DOI：: 10.1088/1748-0221/9/09/C09029

摘要：

本文讨论了高能光子（γ-γ、γ-电子）对撞机绝对能标的标定问题。光子对撞机的光度谱很宽，并且有一个相当尖锐的高能边缘，例如，可以用来测量伽马-伽马到H过程中的希格斯玻色子的质量，或者通过观察截面阈值来测量带电标量的质量。除了精确了解亮度光谱的边缘能量外，更重要的是要有一种方法来校准探测器的绝对能量标度。乍一看，康普顿散射本身提供了一种独特的方法来确定光束能量，并产生已知能量的粒子，可用于探测器校准。能量标度由电子质量m_e和激光光子能量ω_0给出。然而，由于在转换区（\sim 0.3）的康普顿散射中的大的非线性效应，这在现实的光子对撞机中不起作用。我们认为，γ电子到eZ_0的过程提供了校准探测器能量标度的最佳方法，其中能量标度由m_Z给出。

英文摘要：

Calibration of the absolute energy scale at high-energy photon (gamma-gamma, gamma-electron) colliders is discussed. The luminosity spectrum at photon colliders is broad and has a rather sharp high-energy edge, which can be used, for example, to measure the mass of the Higgs boson in the process gamma-gamma to H or masses of charged scalars by observing the cross-section threshold. In addition to the precise knowledge of the edge energy of the luminosity spectrum, it is even more important to have a way to calibrate the absolute energy scale of the detector. At first sight, Compton scattering itself provides a unique way to determine the beam energies and produce particles of known energies that could be used for detector calibration. The energy scale is given by the electron mass m_e and laser photon energy ω_0. However, this does not work at realistic photon colliders due to large nonlinear effects in Compton scattering at the conversion region (ξ^2 \sim 0.3). It is argued that the process gamma-electron to eZ_0 provides the best way to calibrate the energy scale of the detector, where the energy scale is given by m_Z.

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。

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英文摘要：

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