γ Determination from TREE Decays (B → DK) with LHCb

Details γ Determination from TREE Decays (B → DK) with LHCb γ Determination from TREE Decays (B → DK) with LHCb

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008fuin.conf..447v&link_type=abstract

FUNDAMENTAL INTERACTIONS. Proceedings of the 22nd Lake Louise Winter Institute. Held 19-24 February 2007 in Lake Louise, Alberta

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Scientific paper

Direct measurements of the angle γ of the CKM unitarity triangle still have a relatively large uncertainty. B → DK decays provide a theoretically clean way of measuring γ, as they involve only tree diagrams. LHCb will measure γ using various methods. One method uses the B0s -> D∓ sK± decay, where CP violation can be measured from the time-dependent decay rates. The corresponding sensitivity on γ with 2 fb-1 of data is expected to be about 13°. Other methods use B → D0K decays, where the D0 and /line{D}0 decay into the same final state. With the ADS+GLW strategy the sensitivity ranges between 5-15° for the charged B decays and between 7-10° for the neutral B decays. With the Dalitz method the sensitivity is estimated to be 8° using charged B decays. Combining all methods a sensitivity on γ with 2 fb-1 of data is estimated to be roughly 5°.

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