Study of D⁺ and D_s⁺ Decay Properties at Belle

2009/10/02 by The Belle Collaboration, Lee, S., Ko, B. R. +1
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.0910.0296

Abstract

We report the first observation of the doubly Cabibbo-suppressed decay, D⁺_s → K⁺K⁺π^- and the significantly improved measurement of the doubly Cabibbo-suppressed decay, D⁺ → K⁺π⁺π^- using \textrm605 fb^-1 of data collected with the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. The branching ratio with respect to its Cabibbo-favored counterpart are B(D⁺_s → K⁺K⁺π^-)/B(D⁺_s → K⁺K^-π⁺) = 0.229±0.028±0.012)% and B(D⁺ → K⁺π⁺π^-)/B(D⁺ → K^-π⁺π⁺) = (0.569±0.018±0.014)%, where the first uncertainties are statistical and the second is systematic. We also report the improved measurement of D⁺ → K⁰_SK⁺ and D⁺_s → K⁰_Sπ⁺ branching ratios using the same amount of data samples. The measured branching ratios with respect to the Cabibbo-favored modes are B(D⁺ → K⁰_SK⁺)/B(D⁺ → K⁰_Sπ⁺) = (0.1899±0.0011±0.0018) and B(D⁺_s → K⁰_Sπ⁺)/B(D⁺_s → K⁰_SK⁺) = (0.0803±0.0024±0.0012).

Related

• Search for D⁺ → K^- K⁰_s π⁺ π⁺ π⁰ at Belle
• Measurement of D⁰ decays to K⁰_L π⁰ and K⁰_S π⁰ at Belle
• Measurement of the branching fractions for B⁰ → D_s^*+π^- and B⁰ → D_s^*-K⁺ decays
• Improved measurements of D_s meson decay constant and branching fractions of D_s⁺→ K^-K⁺π⁺, K⁰K⁺ and ηπ⁺ decays from Belle
• Measurement of B -> D_s K pi branching ratios