DOUBLE RADIATIVE DECAY Z-]L(-)GAMMA-GAMMA IN THE FRAMEWORK OF THE STANDARD THEORY()L()

Authors
MIKHEEV NV PARKHOMENKO AY
Citation
Nv. Mikheev et Ay. Parkhomenko, DOUBLE RADIATIVE DECAY Z-]L(-)GAMMA-GAMMA IN THE FRAMEWORK OF THE STANDARD THEORY()L(), Physics of atomic nuclei, 57(2), 1994, pp. 265-268
Citations number
6
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields
Journal title
Physics of atomic nuclei → ACNP
ISSN journal
10637788
Volume
57
Issue
2
Year of publication
1994
Pages
265 - 268
Database
ISI
SICI code
1063-7788(1994)57:2<265:DRDZIT>2.0.ZU;2-I
Abstract
The standard model approach to Z-boson decay Z --> l+l-gammagamma is c onsidered. The distribution functions of two-photon and two-lepton inv ariant masses is obtained in logarithmic approximation. Near the thres hold of Z-boson creation, the process e+e- --> l+l-gammagamma is contr ibuted predominantly by the decay under consideration at large values of two-photon invariant mass m(gammagamma) It is pointed out that four events with m(gammagamma) congruent-to 60 GeV observed in e+e- annihi lation and described in [1] seem to be of electroweak nature.