What can be learned from the Belle spectrum for the decay tau- -> nu_tau K_S pi-

Abstract

A theoretical description of the differential decay spectrum for the decay tau- -> nu_tau K_S pi-, which is based on the contributing K pi vector and scalar form factors F_+^{K pi}(s) and F_0^{K pi}(s) being calculated in the framework of resonance chiral theory (R$\chi$T), additionally imposing constraints from dispersion relations as well as short distance QCD, provides a good representation of a recent measurement of the spectrum by the Belle collaboration. Our fit allows to deduce the total branching fraction B[tau- -> nu_tau K_S pi-] = 0.427 +- 0.024 % by integrating the spectrum, as well as the K^* resonance parameters M_{K^*} = 895.3 +- 0.2 MeV and Gamma_{K^*} = 47.5 +- 0.4 MeV, where the last two errors are statistical only. From our fits, we confirm that the scalar form factor F_0^{K pi}(s) is required to provide a good description, but we were unable to further constrain this contribution. Finally, from our results for the vector form factor F_+^{K pi}(s), we update the corresponding slope and curvature parameters lambda'_+ = (25.2 +- 0.3)*10^{-3} and lambda''_+ = (12.9 +- 0.3)*10^{-4}, respectively.

arXiv comment15 pages, 2 figures

References in corpus (33)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Physics of Hadronic Tau Decays
• S-wave Kpi scattering in chiral perturbation theory with resonances
• Effective Field Theory Description of the Pion Form Factor
• Strangeness-changing scalar form factors
• V_us and m_s from hadronic tau decays
• Study of tau- -> K_S pi- nu_tau decay at Belle
• Scalar K pi form factor and light quark masses
• Determination of m_s and |V_us| from hadronic tau decays
• Study of tau decays involving kaons, spectral functions and determination of the strange quark mass
• The hadronic off-shell width of meson resonances
• Strange Quark Mass Determination from Cabibbo-Suppressed Tau Decays
• Light quark masses from scalar sum rules
• The vector form factor of the pion from unitarity and analyticity: a model-independent approach
• tau -> (3 pions) nu_tau decays in the Resonance Effective Theory
• Spectral distribution for the decay tau -> nu_tau K pi
• Strange Quark Mass from the Invariant Mass Distribution of Cabibbo-Suppressed Tau Decays
• Perturbative Quark Mass Corrections to the Tau Hadronic Width
• The Strange Quark Mass From Flavor Breaking in Hadronic Tau Decays
• Strange Quark Mass from Tau Lepton Decays with O(alpha_s^3) Accuracy
• Analyticity constraints on the strangeness changing vector current and applications to $\tau \to K\pi {\nu }_{\tau }$, $\tau \to K\pi \pi {\nu }_{\tau }$
• Measurement of the tau- --> K- pi0 nu_tau Branching Fraction
• Rho Meson Properties in the Chiral Theory Framework
• Measurement of the Strange Spectral Function in Hadronic tau Decays
• |V_us| and m_s from hadronic tau decays
• Determination of the strange quark mass from Cabibbo-suppressed tau decays with resummed perturbation theory in an effective scheme
• Determining the Strange Quark Mass in Cabibbo Suppressed Tau Lepton Decays
• Decay Constants of Charged Pseudoscalar Mesons
• Strange Quark Mass Dependence of the Tau Hadronic Width
• Hadronic decays of the tau lepton: Theoretical outlook
• Tau Decay Determination of the Strange Quark Mass
• Extraction of m_s and |V_us| from Hadronic Tau Decays

Cited by in corpus (53)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Precision Tau Physics
• Physics with the KLOE-2 experiment at the upgraded DA$\varphi$NE
• Lepton flavor violation in the Higgs sector and the role of hadronic tau-lepton decays
• Resonance chiral Lagrangian currents and tau decay Monte Carlo
• Dispersive representation and shape of the Kl3 form factors: robustness
• Hadron structure in tau -> KKpi nu_tau decays
• K pi vector form factor, dispersive constraints and tau -> nu_tau K pi decays
• One meson radiative tau decays
• Dispersive representation of the pion vector form factor in $\tau \to \pi \pi {\nu }_{\tau }$ decays
• K pi vector form factor constrained by tau ---> K pi nu_tau and K_l3 decays
• Exclusive radiative B-meson decays within the aligned two-Higgs-doublet model
• Resonance Chiral Lagrangian analysis of ${\tau }^{-}\to {\eta }^{(\prime )}{\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays
• Analysis of the D+ --> K- pi+ e+ nu_e decay channel
• Study of tau- --> V P- nu(tau) in the framework of resonance chiral theory
• A dispersive analysis of the pion vector form factor and ${\tau }^{-}\to K^{-}{K}_S{\nu }_{\tau }$ decay
• Predicting the tau strange branching ratios and implications for V_{us}
• Exclusive hadronic tau decays as probes of non-SM interactions
• Combined analysis of the decays ${\tau }^{-}\to K_S{\pi }^{-}{\nu }_{\tau }$ and ${\tau }^{-}\to K^{-}\eta {\nu }_{\tau }$
• ${\tau }^{-}\to K^{-}{\eta }^{(\prime )}{\nu }_{\tau }$ decays in Chiral Perturbation Theory with Resonances
• Effective-field theory analysis of the ${\tau }^{-}\to (K\pi {)}^{-}{\nu }_{\tau }$ decays
• The weak radiative pion vertex in τ^- ->π^-ν_τl^+ l^- decays
• Kpi form factors and final state interactions in D+ --> K- pi+ pi+ decays
• Contributions of $K_0^{\ast }(1430)$ and $K_0^{\ast }(1950)$ in the three-body decays $B\to K\pi h$
• CP asymmetry in $\tau \to K_S\pi {\nu }_{\tau }$ decays within the Standard Model and beyond
• Collider phenomenology of a unified leptoquark model
• Can the observed CP asymmetry in tau --> K pi nu_tau be due to Non-Standard Tensor interactions?
• Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data
• First determination of $f_{+}(0)|V_{us}|$ from a combined analysis of $\tau \to K\pi {\nu }_{\tau }$ decay and $\pi K$ scattering with constraints from $K_{\ell 3}$ decays
• On the scalar $\pi K$ form factor beyond the elastic region
• Two and Three Pseudoscalar Production in $e^{+}{e}^{-}$ annihilation and their contributions to $(g-2{)}_{\mu }$
• $CP$ asymmetry in the angular distribution of $\tau \to K_S\pi {\nu }_{\tau }$ decays
• Radiative transition processes of light vector resonances in a chiral framework
• $CP$ asymmetry in the angular distributions of $\tau \to K_S\pi {\nu }_{\tau }$ decays -- II: general effective field theory analysis
• Effective-field theory analysis of the ${\tau }^{-}\to K^{-}({\eta }^{(\prime )},K^0){\nu }_{\tau }$ decays
• Hadronic currents for ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ and other decays of interest in TAUOLA
• Model Independent Electromagnetic corrections in hadronic $\tau$ decays
• The decay $\tau \to K^{-}{\pi }^0{\nu }_{\tau }$ in the Nambu-Jona-Lasinio model
• Hadronic matrix elements for TAUOLA: 3 pi and KKpi channels
• Study of $\psi (3686)\to \omega K\bar{K}\pi$ decays
• Absorptive corrections for vector mesons. Matching to complex mass scheme and longitudinal corrections
• On the angular distributions of tau- --> K_S pi-nu_tau decay
• The Kpi vector form factor and constraints from Kl3 decays
• Electromagnetic corrections in hadronic tau decay
• Combined analysis of the decays ${\tau }^{-}\to K_S{\pi }^{-}{\nu }_{\tau }$ and ${\tau }^{-}\to K^{-}\eta {\nu }_{\tau }$
• Charged Higgs Flavor Changing Current in tau^- to nu_X K^- pi^0
• Hadronic and radiative decays of the tau lepton
• Global Determination of $|V_{us}|$
• Analysis of tau -> Ks pion nu_tau Belle data in a chiral framework
• Study of two- and three-meson decay modes of tau-lepton with Monte Carlo generator TAUOLA