Observation of Elastic Neutrino and Antineutrino Scattering and Parity Violation in the Weak Hadronic Neutral Current

1977 ◽  
pp. 302-318 ◽  
Author(s):  
L. R. Sulak ◽  
C. Cline ◽  
A. Entenberg ◽  
W. Kozanecki ◽  
A. K. Mann ◽  
...  
Keyword(s):  
Parity Violation ◽  
Neutral Current

The link between the emergence of the GIM mechanism and the nature of the neutral-current parity violation

1980 ◽  
Vol 175 (1) ◽  
pp. 175-188 ◽  
Author(s):  
Aharon Davidson ◽  
Jogesh C. Pati
Keyword(s):  
Parity Violation ◽  
Neutral Current ◽  
Gim Mechanism

scholarly journals R-parity violation in flavor-changing neutral current processes and top quark decays

1996 ◽  
Vol 54 (7) ◽  
pp. 4445-4452 ◽  
Author(s):  
K. Agashe ◽  
M. Graesser
Keyword(s):  
Parity Violation ◽  
Top Quark ◽  
Neutral Current ◽  
Flavor Changing ◽  
Quark Decays ◽  
Flavor Changing Neutral Current

Evidence for parity violation in neutral current induced π0 production from a comparison of neutrino and antineutrino cross sections

1977 ◽  
Vol 68 (4) ◽  
pp. 377-380 ◽  
Author(s):  
H. Faissner ◽  
E. Frenzel ◽  
T. Hansl ◽  
D. Hoffmann ◽  
E. Radermacher ◽  
...  
Keyword(s):  
Cross Sections ◽  
Parity Violation ◽  
Neutral Current

Neutral current parity violation and gauge flavours

1977 ◽  
Vol 68 (3) ◽  
pp. 242-246
Author(s):  
H.S. Mani ◽  
V. Raval ◽  
Probir Roy
Keyword(s):  
Parity Violation ◽  
Neutral Current

LOOKING FOR Z′ BOSONS IN SUPERSYMMETRIC E6 Models THROUGH ELECTROWEAK PRECISION DATA

2000 ◽  
Vol 15 (05) ◽  
pp. 311-331 ◽  
Author(s):  
GI-CHOL CHO
Keyword(s):  
Parity Violation ◽  
Neutral Current ◽  
Z Bosons ◽  
Gauge Coupling ◽  
Precision Data ◽  
Mixing Angle ◽  
Mixing Parameter ◽  
Data Points ◽  
Electroweak Precision ◽  
Electroweak Precision Data

We review constraints on additional Z′ bosons predicted in supersymmetric (SUSY) E6 models from electroweak experiments — Z-pole experiments, mW measurements and the low-energy neutral current (LENC) experiments. Four representative models — χ, ψ, η and ν — are studied in some detail. We find that the improved data of parity violation in cesium atom, which is 2.2-σ away from the standard model (SM) prediction, could be explained by the exchange of the heavy mass eigenstate Z2 in the intermediate state. The improvement over the SM can be found in χ, η, ν models, where the total χ2 of the fit to the 26 data points decreases by about five units, owing to the better fit to the atomic parity violation. Impacts of the kinetic mixing between the U (1)Y and U (1)′ gauge bosons on the χ2-analysis are studied. We find that the Z′ model with (βE,δ)=(-π/4,0.2), where βE is the mixing angle between Zχ and Zψ bosons and δ denotes the kinetic mixing, shows the most excellent fit to the data: The total χ2 decreases by about seven units as compared to the SM. We introduce the effective mixing parameter ζ, a combination of the mass and the kinetic mixing parameters. The 95% CL lower mass bound of Z2 can be shown as a function of ζ. A theoretical prediction on ζ and the U (1)′ gauge coupling gE is studied for the χ, ψ, η and ν models by assuming the minimal particle content of the SUSY E6 models.

Measurement of the weak neutral current via nuclear parity violation

1985 ◽  
Vol 31 (1) ◽  
pp. 70-77 ◽  
Author(s):  
John F. Donoghue ◽  
Barry R. Holstein
Keyword(s):  
Parity Violation ◽  
Neutral Current ◽  
Weak Neutral Current

Measurement of the parity violation in the quasi-elastic scattering of polarized electrons from 9Be

1988 ◽  
Vol 66 (6) ◽  
pp. 513-519
Author(s):  
Reiner Neuhausen
Keyword(s):  
Elastic Scattering ◽  
Parity Violation ◽  
Neutral Current ◽  
Coupling Constants ◽  
Standard Theory ◽  
Weak Neutral Current ◽  
Polarized Electrons ◽  
Quasi Elastic Scattering ◽  
Systematic Uncertainties ◽  
Model Independent

The standard theory of electroweak interactions predicts a parity nonconserving asymmetry in the order of 1 × 10−5 for the quasi-elastic scattering of 300 MeV longitudinally polarized electrons from nuclei at backward angles. The experimental setup for the detection of such small effects is described, and the procedure of data taking and analysis is discussed with regard to systematic uncertainties. The experimental asymmetry is found to be Aexp = (−3.51 ± 0.68 ± 0.20) × 10−6, where the first quoted error specifies the statistical uncertainty, the second one, the systematical. Aexp is interpreted in terms of model-independent coupling constants between the weak neutral current and the nucleon.

PARITY VIOLATION IN239U NEUTRON RESONANCES

1990 ◽  
Vol 51 (C6) ◽  
pp. C6-523-C6-526
Author(s):  
S. PENTTILÄ ◽  
C. D. BOWMAN ◽  
J. E. BUSH ◽  
P. P. J. DELHEIJ ◽  
C. M. FRANKLE ◽  
...  
Keyword(s):  
Parity Violation
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