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Measurement of differential branching fractions of inclusive $${B to X_u , ell^+, nu_{ell}}$$ decays

$${B to X_u , ell^+, nu_{ell}}$$崩壊の微分分岐比の測定

Cao, L.*; 谷田 聖   ; Belle Collaboration*; 他199名*

Cao, L.*; Tanida, Kiyoshi; Belle Collaboration*; 199 of others*

The first measurements of differential branching fractions of inclusive semileptonic $${B to X_u , ell^+, nu_{ell}}$$ decays are performed using the full Belle data set of 711 fb$$^{-1}$$ of integrated luminosity at the $$Upsilon(4S)$$ resonance and for $$ell = e, mu$$. Differential branching fractions are reported as a function of the lepton momentum, the four-momentum-transfer squared, light-cone momenta, the hadronic mass, and the hadronic mass squared. They are obtained by subtracting the backgrounds from semileptonic $${B to X_c , ell^+, nu_{ell}}$$ decays and other processes, and corrected for resolution and acceptance effects. The measured distributions are compared to predictions from inclusive and hybrid $${B to X_u , ell^+, nu_{ell}}$$ calculations.

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パーセンタイル:54.44

分野:Physics, Multidisciplinary

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