literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Upsilon dipion transitions at energies near the upsilon(4S)

Collaboration
Aug, 1998
17 pages
Published in:
  • Phys.Rev.D 59 (1999) 052003
e-Print:
DOI:
Report number:
  • SLAC-REPRINT-1998-097,
  • CLNS-98-1576,
  • CLEO-98-12
Experiments:
  • CESR-CLEO-II
View in:
linksdatasets
reference search13 citations

Citations per year

200220042006200820101024
Abstract:
Using a data sample collected with the CLEO II detector at CESR, we have searched for dipion transitions between pairs of Υ\Upsilon resonances at energies near the Υ(4S)\Upsilon(4S). We obtain upper limits B(Υ(4S)→Υ(2S)π+π−)<3.9×10−4B(\Upsilon(4S)\to \Upsilon(2S)\pi^+\pi^-) < 3.9 \times 10^{-4} and B(Υ(4S)→Υ(1S)π+π−)<1.2×10−4B(\Upsilon(4S)\to \Upsilon(1S)\pi^+\pi^-) < 1.2 \times 10^{-4}. We also observe the transitions Υ(3S)→Υ(1S)\Upsilon(3S)\to \Upsilon(1S), Υ(3S)→Υ(2S)\Upsilon(3S)\to \Upsilon(2S), and Υ(2S)→Υ(1S)\Upsilon(2S)\to \Upsilon(1S), from which we measure the cross-sections for the radiative processes e+e−→Υ(3S)γe^+e^- \to \Upsilon(3S)\gamma and e+e−→Υ(2S)γe^+e^- \to \Upsilon(2S)\gamma.
  • electron positron: colliding beams
  • electron positron: annihilation
  • upsilon mesons: electroproduction
  • Upsilon(10570): hadronic decay
  • Upsilon(10355): hadronic decay
  • Upsilon(10020): hadronic decay
  • pi: pair production
  • upsilon mesons: branching ratio
  • upper limit
  • channel cross section