Tau decays into kaons

Finkemeier, Markus; Mirkes, E.

doi:10.1007/s002880050024

Cited by 60 publications

(108 citation statements)

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“…The branching ratio B(τ − → K − π 0 π 0 ν τ ) = (0.56 ± 0.20 ± 0.15) × 10 −3 is significantly smaller than the value (1.1-1.4) × 10 −3 predicted in the model of Ref. [ 11], but in good agreement with the value 0.4 × 10 −3 in Ref. [ 16].…”

Section: Resultssupporting

confidence: 65%

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One-prong $\tau$ decays with kaons

Barate

1999

Eur. Phys. J. C

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One-prong τ decays into final states involving kaons are studied with about 161k τ + τ − events collected by the ALEPH detector from 1991 to 1995. Charged kaons are identified by dE/dx measurement, while K 0 L 's are detected through their interaction in calorimeters. Branching ratios are measured for the inclusive mode, B(τ − → K − Xν τ ) = (1.52 ± 0.04 ± 0.04)%, where X can be any system of neutral particles, and for the exclusive modesUpper limits for B(τ − → K 0 π − π 0 π 0 ν τ ) and B(τ − → K − K 0 π 0 π 0 ν τ ) are also obtained. Mass spectra in the final states are addressed in order to study the relevant dynamics.

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Section: Resultssupporting

confidence: 65%

“…In the simulation, form factors for the two-and three-meson decay channels are derived from Ref. [ 10,11], and the four-meson τ decay channels, for which no model is available at present, are generated according to the general V −A weak matrix element folded with phase space distributions for hadrons.…”

Section: Branching Ratios For Decays With Charged Kaonsmentioning

confidence: 99%

One-prong $\tau$ decays with kaons

Barate

1999

Eur. Phys. J. C

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“…The decay fraction agrees well with the estimated range (2.4 − 4.0) × 10 −3 predicted by [17] and (2.3 − 2.7) × 10 −3 predicted by [18].…”

Section: Discussionsupporting

confidence: 87%

“…assuming that the decay contains only one π 0 , is predicted to be in the range of (0.9 − 3.7) × 10 −3 from [17] and in the range of (8.1 −9.6) ×10 −3 from [18]. The τ − → π − K 0 π 0 ν τ branching ratio prediction by Finkemeier and Mirkes is significantly higher than the experimental results, however they argue that the widths of the K 1 resonance [11] used in their calculation are unusually narrow and that increasing the K 1 width would give a prediction that agrees with the experimental measurements [19].…”

Section: Discussionmentioning

confidence: 99%

Tau decays with neutral kaons

Abbiendi

2000

Eur. Phys. J. C

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The branching ratio of the τ lepton to a neutral kaon meson is measured from a sample of approximately 200,000 τ decays recorded by the OPAL detector at centre-ofmass energies near the Z 0 resonance. The measurement is based on two samples which identify one-prong τ decays with K 0 L and K 0 S mesons. The combined branching ratios are measured to bewhere the first error is statistical and the second systematic.

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“…(3,4). In the following, the τ → Kπν τ decay mode is analyzed in the hadronic rest frame q 1 + q 2 = 0.…”

Section: Decay Rate Angular Distributions and Structure Functionsmentioning

confidence: 99%

The scalar contribution toτ →K πν τ

Finkemeier

Mirkes

1996

Z. Phys. C - Particles and Fields

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We consider the scalar form factor in τ → Kπν τ decays. It receives contributions both from the scalar resonance K * 0 (1430) and from the scalar projection of off-shell vector resonances. We construct a model for the hadronic current which includes the vector resonances K * (892) and K * (1410) and the scalar resonance K * 0 (1430). The parameters of the model are fixed by matching to the O(p 4 ) predictions of chiral perturbation theory. Suitable angular correlations of the Kπ system allow for a model independent separation of the vector and scalar form factor. Numerical results for the relevant structure functions are presented.

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Tau decays into kaons

Cited by 60 publications

References 0 publications

One-prong $\tau$ decays with kaons

One-prong $\tau$ decays with kaons

Tau decays with neutral kaons

The scalar contribution toτ →K πν τ

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