γγ interactions with KLOE  

作　　者：Federico Nguyen 

机构地区：[1]INFN Sezione 'Roma TRE'

出　　处：《Chinese Physics C》2010年第6期795-800,共6页中国物理C（英文版）

摘　　要：Studies of γγ interactions are performed with the KLOE detector, without tagging of the outgoing e^＋e^-. The data sample is from an integrated luminosity of 240 pb^-1. It was collected at the φ-factory DAONE with e^＋e^- beams colliding at √s ≌1 GeV, below the φ resonance peak. We present preliminary results concerning the observation of the γγ→η process and the evidence for γγ→π^0π^0 production at low π^0π^0 invariant masses.Studies of γγ interactions are performed with the KLOE detector, without tagging of the outgoing e^＋e^-. The data sample is from an integrated luminosity of 240 pb^-1. It was collected at the φ-factory DAONE with e^＋e^- beams colliding at √s ≌1 GeV, below the φ resonance peak. We present preliminary results concerning the observation of the γγ→η process and the evidence for γγ→π^0π^0 production at low π^0π^0 invariant masses.

关 键 词：e^＋e^- collisions pseudoscalar meson width π pair production 

分 类 号：O572.212[理学—粒子物理与原子核物理]