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Measurement of the CKM angle \gamma\ from a combination of B->Dh analyses

Abstract : A combination of three LHCb measurements of the CKM angle \gamma\ is presented. The decays B->DK and B->D\pi\ are used, where D denotes an admixture of D0 and D0-bar mesons, decaying into KK, \pi\pi, K\pi, K\pi\pi\pi, KS\pi\pi, or KSKK final states. Combining results from B->DK decays alone a best-fit value of \gamma=70.5 deg is found, and confidence intervals are set \gamma\ in [54.9, 85.4] deg at 68% CL, \gamma\ in [41.8, 98.1] deg at 95% CL. The best-fit value of \gamma\ found from a combination of results from B->D\pi\ decays alone, is \gamma=97.1 deg, and the confidence intervals \gamma\ in [8.8, 43.8] deg or [79.3, 137.4] deg or [165.8, 177.1] deg at 68% CL are set, without constraint at 95% CL. The combination of results from B->DK and B->D\pi\ decays gives a best-fit value of \gamma=86.0 deg and the confidence intervals \gamma\ in [49.0, 72.5] deg or [79.1, 94.2] deg at 68% CL, \gamma\ in [35.2, 105.6] deg at 95% CL are set. All values are expressed modulo 180 deg.
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Submitted on : Monday, May 13, 2013 - 3:53:21 PM
Last modification on : Sunday, June 26, 2022 - 11:58:48 AM

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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Measurement of the CKM angle \gamma\ from a combination of B->Dh analyses. Physics Letters B, Elsevier, 2013, 726, pp.151-163. ⟨10.1016/j.physletb.2013.08.020⟩. ⟨in2p3-00821944⟩

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