Moments of the Electron Energy Spectrum in B --> X_c l \nu decays at Belle

TL;DR

This paper presents measurements of the moments of the electron energy spectrum in B meson decays, providing detailed insights into the decay dynamics using data from the Belle detector at KEKB.

Contribution

First measurement of the moments of the electron energy spectrum in B --> X_c l nu decays across multiple energy thresholds at Belle.

Findings

Determined the first, second, and third moments for electron energy thresholds between 0.4 and 1.5 GeV.

Provides data useful for refining theoretical models of semileptonic B decays.

Enhances understanding of B meson decay mechanisms and spectrum shape.

Abstract

We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140 fb^-1 data sample collected on the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric energy e^+ e^- collider. We determine the first, second and third moments of the electron energy spectrum for threshold values of the electron energy between 0.4 and 1.5 GeV.