corner
corner

Phys. Rev. D 62, 072006 (2000) [11 pages]

Resonance structure of τ-K-π+π-ντ decays

Download: PDF (286 kB) Buy this article Export: BibTeX or EndNote (RIS)

D. M. Asner et al. (CLEO Collaboration)
Show All Authors/Affiliations

Received 28 March 2000; published 12 September 2000

Using a sample of 4.7 fb-1 integrated luminosity accumulated with the CLEO II detector at the Cornell Electron Storage Ring (CESR), we investigate the mass spectrum and resonant structure in τ-K-π+π-ντ decays. We measure the relative fractions of K1(1270) and K1(1400) resonances in these decays, as well as the K1 masses and widths. Our fitted K1 resonances are somewhat broader than previous hadroproduction measurements, and in agreement with recent CERN LEP results from tau decay. The larger central value of our measured width supports models which attribute the small τ-K-π+π-ντ branching fraction to larger K1 widths than are presently tabulated. We also determine the Ka-Kb mixing angle θK.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.62.072006
DOI:
10.1103/PhysRevD.62.072006
PACS:
13.10.+q, 13.35.Dx, 14.40.Aq