We study the two-body decays of B± mesons to K± and a charmonium state Xcc̅ in a sample of 210.5 fb-1 of data from the BABAR experiment. We perform measurements of absolute branching fractions B(B±→K±Xcc̅ ) using a missing mass technique, and report several new or improved results. In particular, the upper limit B(B±→K±X(3872))<3.2×10-4 at 90% C.L. and the inferred lower limit B(X(3872)→J/ψπ+π-)>4.2% will help in understanding the nature of the recently discovered X(3872).
Measurements of the Absolute Branching Fractions of B±→K±Xcc̅
PERUZZI, Ida Marena;BIASINI, Maurizio
2006
Abstract
We study the two-body decays of B± mesons to K± and a charmonium state Xcc̅ in a sample of 210.5 fb-1 of data from the BABAR experiment. We perform measurements of absolute branching fractions B(B±→K±Xcc̅ ) using a missing mass technique, and report several new or improved results. In particular, the upper limit B(B±→K±X(3872))<3.2×10-4 at 90% C.L. and the inferred lower limit B(X(3872)→J/ψπ+π-)>4.2% will help in understanding the nature of the recently discovered X(3872).File in questo prodotto:
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