Search results for "muon"
showing 10 items of 1376 documents
"Table 12" of "Measurements of the line shape of the Z0 and determination of electroweak parameters from its hadronic and leptonic decays"
1994
MU+ MU- cross sections from the 1991 data set for events having both muons above 15 GeV and the polar angle of the mu- 20 to 160 degrees and the accollinearity angle <10 degrees. Additional systematic uncertainty, excluding luminosity, is 0.5 pct.
"Table 1" of "Study of the Leptonic Decays of the $Z^0$ Boson"
1990
E+ E- final state is t-channel subtracted.
"Table 4" of "A Precise Determination of the Number of Families With Light Neutrinos and of the $Z$ Boson Partial Widths"
1990
No description provided.
"Table 5" of "Measurement of W pair production in e+ e- collisions at centre-of-mass energies from 183-GeV to 209-GeV."
2004
The measured cross section for the TAU NU MU NU final state. The DSYS error is the typical systematic error.
"Table 10" of "Improved measurements of cross-sections and asymmetries at the Z0 resonance"
2000
No description provided.
"Table 4" of "Improved measurements of cross-sections and asymmetries at the Z0 resonance"
2000
No description provided.
Two-photon exchange in muon-nuclear scattering
1980
We obtain a low-momentum-transfer theorem for positive- and negative-muon--nuclear scattering, in terms of the charge and the electric and magnetic polarizabilities. The result opens the way to use muons as a tool to probe the electromagnetic structure of composite objects. Predictions of this two-photon effect for the asymmetry in the angular distribution of negative and positive muons scattered by /sup 4/He are given.
The lifetime of unstable particles in electromagnetic fields
2007
We show that the electromagnetic moments of unstable particles (resonances) have an absorptive contribution which quantifies the change of the particle's lifetime in an external electromagnetic field. To give an example we compute here the imaginary part of the magnetic moment for the cases of the muon and the neutron at leading order in the electroweak coupling. We also consider an analogous effect for the strongly-decaying $\Delta$(1232) resonance. The result for the muon is Im$ \mu = e G_F^2 m^3/768 \pi^3$, with $e$ the charge and $m$ the mass of the muon, $G_F$ the Fermi constant, which in an external magnetic field of $B$ Tesla give rise to the relative change in the muon lifetime of $…
"Table 3" of "Measurement of W pair production in e+ e- collisions at 189-GeV."
2000
Results of cross sections for decays into the different topological decay channels.
"Table 2" of "Measurement of W pair production in e+ e- collisions at 189-GeV."
2000
Cross section for the fully leptonic decay channels.