Measurement of partial branching fractions of inclusive charmless B meson decays to K+, K0, and pi+

Abstract

We present measurements of partial branching fractions of $B\to K^{+}X$, $B\to K^{0}X$, and $B\to {\pi }^{+}X$, where $X$ denotes any accessible final state above the endpoint for B decays to charmed mesons, specifically for momenta of the candidate hadron greater than 2.34 (2.36) GeV for kaons (pions) in the B rest frame. These measurements are sensitive to potential new-physics particles which could enter the $b\to s(d)$ loop transitions. The analysis is performed on a data sample consisting of $383\times 10^6$ $B\bar{B}$ pairs collected with the BaBar detector at the PEP-II $e^{+}{e}^{-}$ asymmetric energy collider. Our results are in agreement with standard model predictions and exclude large enhancements of the inclusive branching fraction due to sources of new physics.

arXiv comment8 pages, 3 postscript figures submitted to Physical Review D (Rapid Communications)

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