literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Measurement of the muonic branching fractions of the narrow Upsilon resonances

Collaboration
Sep, 2004
9 pages
Published in:
  • Phys.Rev.Lett. 94 (2005) 012001
e-Print:
DOI:
Report number:
  • CLNS-04-1887,
  • CLEO-04-11
Experiments:
View in:
pdf
reference search47 citations

Citations per year

20042008201220162020051015
Abstract:
The decay branching fractions of the three narrow Upsilon resonances to mu+ mu- have been measured by analyzing about 4.3 1/fb e+e- data collected with the CLEO III detector. The branching fraction B(Y(1S) -> mu+ mu-) = (2.49 +- 0.02 +- 0.07)% is consistent with the current world average but B(Y(2S) -> mu+ mu-) = (2.03 +- 0.03 +- 0.08)% and B(Y(3S) -> mu+ mu-) = (2.39 +- 0.07 +- 0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Y(2S) and Y(3S) resonances and lower other branching fractions that rely on these decays in their determination.
  • 13.20.Gd
  • 14.40.Gx
  • Upsilon meson resonances
  • meson leptonic decay
  • electron-positron inclusive interactions
  • electron positron: colliding beams
  • electron positron: annihilation
  • upsilon mesons: electroproduction
  • upsilon mesons: leptonic decay
  • muon: pair production
Loading ...