CLEO also measures the CP asymmetry:
This is less sensitive to lepton ID asymmetry.
Experimental technique:
• Observe one B via semileptonic mode (only l observed).
• Observe other B via 2-body hadronic decays (D*pw & D*rw). D* _ Dps. Partial reconstruction. Only hw and ps observed. • Mixing causes same-sign hw and ps.
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