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    User name D. Parno

    Log entry time 19:15:38 on February 19, 2009

    Entry number 262145

    Followups:

    keyword=Good electron rate for J kinematic

    I did a full physics replay of Run 20269 to evaluate the good electron rate for the J kinematic (LHRS momentum setting: 1.42 GeV/C).

    The bottom pane of the figure shows the good electrons (with Cerenkov cuts to reduce pions); the cuts could probably afford to be more stringent. We have 1824 events for a run that lasted 114.104 minutes (according to the end-of-run HALOG post).

    This results in an estimated rate of 0.266 Hz. This is a factor of about 2.5 more than the expected rate of 0.105 Hz. Interestingly, for the L kinematic we computed a very similar factor (2.4x more actual than expected).

    A copy of this log entry has been emailed to: brads, vasulk



    Figure 1

    J_goodelectrons_20269