Joint Extraction of m_s and V_us from Hadronic Tau Decays

Abstract

We study the simultaneous determination of m_s and V_us from flavor-breaking hadronic tau decay sum rules using weights designed to bring under better control problems associated with the slow convergence of the relevant D=2 OPE series. Much improved stability and consistency is found as compared to the results of conventional analyses based on the ``(k,0) spectral weights''. Results for m_s are in excellent agreement with those of recent strange scalar and strange pseudoscalar sum rule analyses, as well as recent lattice analyses, while those for V_us agree within errors with the output from recent lattice-based Gamma[K_{mu 2}]/Gamma[pi_{mu 2}] and K_{\ell 3}-based analyses. Very significant error reductions are shown to be expected, especially for V_us, once the improved strange spectral data from the B factory experiments becomes available.

arXiv comment12 pages, 4 figures

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Cited by in corpus (10)

• The Physics of the B Factories
• The strong coupling and its running to four loops in a minimal MOM scheme
• Power corrections to alpha_s(M_τ),|V_{us}| and m_s
• Analyticity constraints on the strangeness changing vector current and applications to $\tau \to K\pi {\nu }_{\tau }$, $\tau \to K\pi \pi {\nu }_{\tau }$
• A resolution of the inclusive flavor-breaking $\tau$ $|V_{us}|$ puzzle
• Inclusive production of $J/\psi$ meson in proton-proton collisions at BNL RHIC
• Duality violations in tau hadronic spectral moments
• A Mixed Tau-Electroproduction Sum Rule for V_us
• Status of the Hadronic tau Decay Determination of |V_{us}|
• Renormalization group improved $m_s$ and $|V_{us}|$ determination from hadronic $\tau$ decays