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Measurement of differential cross-sections for muon-neutrino electron scattering

The CHARM-II collaboration Vilain, P. ; Wilquet, G. ; Beyer, R. ; et al.
Phys.Lett.B 302 (1993) 351-355, 1993.
Inspire Record 354904 DOI 10.17182/hepdata.16131

We report on a study of the differential cross section d σ /d y for the processes of elastic ν μ - and ν μ - electron scattering. The data on which this analysis is based were recorded between 1987 and 1990 with the CHARM II detector in the wide band neutrino beam at the CERN-SPS. For the first time the shapes of these y -distributions have been determined in a model-independent way. A fit to the data yields for the squares of the neutral coupling constants the ratio g R 2 / g L 2 =0.60 ± 0.19 (stat.) ± 0.09 (syst.).

3 data tables
Table 1

Cross sections in arbitrary units.

Table 2

Cross sections in arbitrary units.

Table 3

Value of SIN2TW obtained from data.


A New Determination of the Electroweak Mixing Angle From $\nu_\mu$ Electron Scattering

The CHARM-II collaboration Geiregat, D. ; Vilain, P. ; Wilquet, G. ; et al.
Phys.Lett.B 232 (1989) 539, 1989.
Inspire Record 283348 DOI 10.17182/hepdata.29754

We are reporting on a new determination of sin 2 ϑ w from the ratio of v μ e to v e scattering cross sections. A new detector designed for this purpose was exposed tothe Wide Band Neutrino Beamof the 450 GeV (CERN SPS. An analysis of data taken in 1987 and 1988 is presented based on 762 v μ e and 1017 v e events. From the ratio of σ( v μ e ) to σ( v μ e ) we determined sin 2 ϑ w =0.233±0.012 ( stat ) ± 0.008 ( syst ) without radiative correction. With radiative correction for m t = m H =100 GeV we find sin 2 ϑ w =0.232±0.012( stat )±0.008( syst ).

2 data tables
Table 1

Data without electroweak radiative corrections.

Table 2

Data corrected for electroweak radiative effects with TOP and HIGGS masses 100 GeV.