2007 年 4 巻 1 号 p. 24-29
A close collaboration between accelerator and experimental physicists have been necessary to proceed physics in the laser electron photon facility in SPring-8 (LEPS). After describing how specific features of the LEPS beamline worked and they were necessary for discovering a pentaquark particle, Θ+, we show an example of the collaboration in identifying the energy resolution of the γ beam.The demand for a new beamline and its key concepts are shortly mentioned.