# Study of direct CP in charmed B decays and measurement of the CKM angle gamma at Belle

Source: [Study of direct CP in charmed B decays and measurement of the CKM angle gamma at Belle](<https://www.sota2.com/research/paper/68fa3a391e209131ce8c9211>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T23:57:36.437Z

Authors: K.Trabelsi

Published: 2013-01-10T06:01:33.000Z

## Abstract

The Belle experiment, running at the KEKB e^+ e^- asymmetric energy collider during the first decade of the century, has recorded 770 fb^-1 of data at the Upsilon(4S) resonance. A combination of recent Belle results obtained with this sample is used to perform a measurement of the CKM angle gamma. We use B^+- -\> DK^+- and B^+- -\> D^\*K^+- decays where the D meson decays into K\_S^0pi+pi-, Kpi, KK, pipi, K\_S^0 pi^0 and K\_S^0 eta final states and D^\* decays into Dpi^0 and Dgamma. Belle obtains the most precise gamma measurement to date, gamma = (68^{+15}\_{-14}) degree.

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1301.2033>)

[PDF](<https://arxiv.org/pdf/1301.2033.pdf>)