Published March 1989 | Version v1
Journal article

Determination of the branching ratio of ρ0 → μ+μ- in the coherent dissociation π- → μ+μ-π- and π- → π+π-π-

  • 1. Institut Fiziki Vysokikh Ehnergij, Serpukhov (USSR)
  • 2. Joint Inst. for Nuclear Research, Dubna (USSR)
  • 3. Istituto Nazionale di Fisica Nucleare, Bologna (Italy)
  • 4. Bologna Univ. (Italy). Dipt. di Fisica
  • 5. Istituto Nazionale di Fisica Nucleare, Milan (Italy)
  • 6. Milan Univ. (Italy). Dipt. di Fisica
  • 7. AN Gruzinskoj SSR, Tbilisi. Inst. Fiziki

Description

In the diffraction dissociation of π- into μ+μ-π- on a Cu nucleus at 50 GeV/c, the cross section σμ+μ-π- for the 1+S(ρ0π) wave was measured. The branching ratio of ρ0 → μ+μ- could be calculated from the ratio of this and the corresponding cross sections in the diffraction dissociation of π- into π+π-π-. The obtained value BRρ0→μ+μ- = (4.6 ± 0.2stat ± 0.2syst) 10-5 is in good agreement with the branching ratio BRρ0→e+e-, as expected if eμ universality holds. (orig.)

Additional details

Publishing Information

Journal Title
Zeitschrift fuer Physik, C
Journal Volume
42
Journal Issue
2
Series
Z. Phys., C.
Journal Page Range
185-187
ISSN
0170-9739
CODEN
ZPCFD