High-statistics study of the τππ0ντ decay

M. Fujikawa et al. (The Belle Collaboration)
Phys. Rev. D 78, 072006 – Published 28 October 2008

Abstract

We report a high-statistics measurement of the branching fraction for τππ0ντ and the invariant mass spectrum of the produced ππ0 system using 72.2fb1 of data recorded with the Belle detector at the KEKB asymmetric-energy e+e collider. The branching fraction obtained is (25.24±0.01±0.39)%, where the first error is statistical and the second is systematic. The unfolded ππ0 mass spectrum is used to determine resonance parameters for the ρ(770), ρ(1450), and ρ(1700) mesons. We also use this spectrum to estimate the hadronic (2π) contribution to the anomalous magnetic moment of the muon (aμππ). Our result for aμππ integrated over the mass range s=2mπ1.8GeV/c2 is aμππ=(523.5±1.5(exp)±2.6(Br)±2.5(isospin))×1010, where the first error is due to the experimental uncertainties, the second is due to the uncertainties in the branching fractions, and the third is due to the uncertainties in the isospin-violating corrections.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
5 More
  • Received 26 May 2008

DOI:https://doi.org/10.1103/PhysRevD.78.072006

©2008 American Physical Society

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 78, Iss. 7 — 1 October 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×