Measurement of absolute branching fractions of inclusive semileptonic decays of charm and charmed-strange mesons

Abstract

We have measured the inclusive semileptonic branching fractions of $D^0$, $D^{+}$, and $D_s^{+}$ mesons. For these measurements, we have used the full CLEO-c open-charm data samples, 818 pb${}^{-1}$ at $E_{\text{CM}}=3.774$ GeV, giving $D^0{\bar{D}}^0$ and $D^{+}{D}^{-}$ events, and 602 pb${}^{-1}$ at $E_{\text{CM}}=4.170$ GeV, giving $D_s^{\ast \pm }{D}_s^{\mp }$ events. We obtain $\mathcal{B}(D^0\to X{e}^{+}{\nu }_e)=(6.46\pm 0.09\pm 0.11)$%, $\mathcal{B}(D^{+}\to X{e}^{+}{\nu }_e)=(16.13\pm 0.10\pm 0.29)$%, and $\mathcal{B}(D_s^{+}\to X{e}^{+}{\nu }_e)=(6.52\pm 0.39\pm 0.15)$%, where the first uncertainties are statistical and the second are systematic. From these and lifetimes obtained elsewhere, we obtain the ratios of semileptonic decay widths $\Gamma (D^{+}\to X{e}^{+}{\nu }_e)/\Gamma (D^0\to X{e}^{+}{\nu }_e)=0.985\pm 0.015\pm 0.024$ and $\Gamma (D_s^{+}\to X{e}^{+}{\nu }_e)/\Gamma (D^0\to X{e}^{+}{\nu }_e)=0.828\pm 0.051\pm 0.025$. The ratio of $D^{+}$ and $D^0$ is consistent with the isospin symmetry prediction of unity, and the ratio of $D_s^{+}$ and $D^0$ differs from unity, as expected.

arXiv comment16 pages, available through http://www.lns.cornell.edu/public/CLNS/, published in Physical Review D Vol.81, No.5 (2010).

References in corpus (23)

• SVD Approach to Data Unfolding
• Semileptonic Meson Decays in the Quark Model: An Update
• Comment on the heavy-->light form factors
• Improved measurements of D meson semileptonic decays to pi and K mesons
• Measurement of Absolute Hadronic Branching Fractions of D Mesons and e^+ e^- --> D D-bar Cross Sections at the psi(3770)
• Precision Measurement of B(D+ -> mu+ nu) and the Pseudoscalar Decay Constant fD+
• Construction, Pattern Recognition and Performance of the CLEO III LiF-TEA RICH Detector
• Measurement of B(Ds+ -->ell+ nu) and the Decay Constant fDs From 600/pb of e+e- Annihilation Data Near 4170 MeV
• Study of the semileptonic decay Ds+ -> f0(980) e+ nu and implications for Bs -> J/psi f0
• Time-Independent Measurements of D0-D0bar Mixing and Relative Strong Phases Using Quantum Correlations
• Partial Wave Analysis of ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$
• Non-factorization effects in heavy mesons and determination of |V_{ub}| from inclusive semileptonic B decays
• Improved Measurement of Absolute Branching Fraction of Ds to tau nu
• Absolute Measurement of Hadronic Branching Fractions of the D_s^+ Meson
• Absolute Branching Fraction Measurements of Exclusive D^+ Semileptonic Decays
• Absolute Branching Fraction Measurements of Exclusive D^0 Semileptonic Decays
• Charm meson resonances in $D\to P\ell \nu$ decays
• Study of the decay Ds+ --> K+ K- e+ nu
• Absolute Branching Fraction Measurements for Exclusive $D_s$ Semileptonic Decays
• Absolute Branching Fraction Measurements for D^+ and D^0 Inclusive Semileptonic Decays
• Hadronic Mass Spectrum Analysis of D+ into K- pi+ mu+ nu Decay and Measurement of the K*(892)^0 Mass and Width
• Determination of the Strong Phase in D0 -> K+pi- Using Quantum-Correlated Measurements
• Inclusive Hadron Yields from Ds+ Decays

Cited by in corpus (15)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Flavor & new physics opportunities with rare charm decays into leptons
• Challenges in Semileptonic B Decays
• Studies of D^+ -> {eta', eta, phi} e^+ nu_e
• Measurement of the absolute branching fraction of the inclusive semileptonic ${\Lambda }_c^{+}$ decay
• The Heavy Quark Expansion for Inclusive Semileptonic Charm Decays Revisited
• Search for rare and forbidden decays of charm and charmed-strange mesons to final states h^+- e^-+ e^+
• Constraining weak annihilation using semileptonic D decays
• Measurements of the branching fractions for the semi-leptonic decays $D_s^{+}\to \varphi e^{+}{\nu }_e$, $\varphi {\mu }^{+}{\nu }_{\mu }$, $\eta {\mu }^{+}{\nu }_{\mu }$ and ${\eta }^{\prime }{\mu }^{+}{\nu }_{\mu }$
• Measurement of the absolute branching fraction of inclusive semielectronic $D_s^{+}$ decays
• Measurements of the absolute branching fractions for $D_s^{+}\to \eta e^{+}{\nu }_e$ and $D_s^{+}\to {\eta }^{\prime }{e}^{+}{\nu }_e$
• Measurement of the inclusive semileptonic branching fraction $\mathcal{B}(B_s^0\to X^{-}{\ell }^{+}{\nu }_{\ell })$ at Belle
• Semileptonic D decays and eta-eta^prime mixing
• Testing Lepton Flavour Universality in ${\rm Y}(4S)$ Decays
• Determination of Strong Coupling Constant from Inclusive Semileptonic Decays of Charmed Mesons