MEASUREMENT OF THE ANGLE φ1(β) AND B ¯ B MIXING (RECENT RESULTS FROM BaBar AND Belle)
نویسنده
چکیده
Recent results from BaBar and Belle experiments on B ¯ B mixing and sin 2φ 1 are presented. Accuracy of ∆m d measurements has reached 1.2%. Higher order effects within the Standard Model or possible new physics effect that might appear in the B ¯ B mixing through non-zero ∆Γ/Γ, CP violation, or CP T violation have been explored. The BaBar and Belle results on sin 2φ 1 from the b → c¯ cs modes are in good agreement with each other and a combined result with an accuracy of 8% is in good agreement with a global CKM fit. A simple average of the sin 2φ 1 values that were measured in the penguin-loop dominated decay modes, φK S , η ′ K S , and K + K − K S , shows about 2.5σ deviation from the Standard Model.
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