Determination of mixing angle in Weinberg’sSU 2⊗U 1 model

1973 ◽  
Vol 6 (12) ◽  
pp. 464-466 ◽  
Author(s):  
R. Acharya ◽  
Z. Horváth
Keyword(s):  
Mixing Angle

scholarly journals Reactor rate modulation oscillation analysis with two detectors in Double Chooz

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
T. Abrahão ◽  
◽  
H. Almazan ◽  
J. C. dos Anjos ◽  
S. Appel ◽  
...  
Keyword(s):  
Reactor Power ◽  
Background Model ◽  
Fast Neutrons ◽  
Mixing Angle ◽  
Oscillation Analysis ◽  
Central Value ◽  
Double Chooz ◽  
Model Independent ◽  
Best Fit

Abstract A θ13 oscillation analysis based on the observed antineutrino rates at the Double Chooz far and near detectors for different reactor power conditions is presented. This approach provides a so far unique simultaneous determination of θ13 and the total background rates without relying on any assumptions on the specific background contributions. The analysis comprises 865 days of data collected in both detectors with at least one reactor in operation. The oscillation results are enhanced by the use of 24.06 days (12.74 days) of reactor-off data in the far (near) detector. The analysis considers the $$ {\overline{\nu}}_e $$ ν ¯ e interactions up to a visible energy of 8.5 MeV, using the events at higher energies to build a cosmogenic background model considering fast-neutrons interactions and 9Li decays. The background-model-independent determination of the mixing angle yields sin2(2θ13) = 0.094 ± 0.017, being the best-fit total background rates fully consistent with the cosmogenic background model. A second oscillation analysis is also performed constraining the total background rates to the cosmogenic background estimates. While the central value is not significantly modified due to the consistency between the reactor-off data and the background estimates, the addition of the background model reduces the uncertainty on θ13 to 0.015. Along with the oscillation results, the normalization of the anti-neutrino rate is measured with a precision of 0.86%, reducing the 1.43% uncertainty associated to the expectation.

Determination of the mixing angle between the kaons withJ P=1+

1969 ◽  
Vol 59 (1) ◽  
pp. 65-70 ◽  
Author(s):  
G. Fourez ◽  
S. Oneda
Keyword(s):  
Mixing Angle

scholarly journals Determination of the Proton's Weak Charge and Its Constraints on the Standard Model

2019 ◽  
Vol 69 (1) ◽  
pp. 191-217 ◽  
Author(s):  
Roger D. Carlini ◽  
Willem T.H. van Oers ◽  
Mark L. Pitt ◽  
Gregory R. Smith
Keyword(s):  
Standard Model ◽  
Parity Violation ◽  
Valence Quark ◽  
Weak Mixing Angle ◽  
Weak Charge ◽  
Mixing Angle ◽  
The Standard Model ◽  
History Of ◽  
Bsm Physics

This article discusses some of the history of parity-violation experiments that culminated in the Qweak experiment, which provided the first determination of the proton's weak charge [Formula: see text]. The guiding principles necessary to the success of that experiment are outlined, followed by a brief description of the Qweak experiment. Several consistent methods used to determine [Formula: see text] from the asymmetry measured in the Qweak experiment are explained in detail. The weak mixing angle sin2θw determined from [Formula: see text] is compared with results from other experiments. A description of the procedure for using the [Formula: see text] result on the proton to set TeV-scale limits for new parity-violating semileptonic physics beyond the Standard Model (BSM) is presented. By also considering atomic parity-violation results on cesium, the article shows how this result can be generalized to set limits on BSM physics, which couples to any combination of valence quark flavors. Finally, the discovery space available to future weak-charge measurements is explored.

scholarly journals A precise determination of the electroweak mixing angle from semi-leptonic neutrino scattering

1986 ◽  
Vol 177 (3-4) ◽  
pp. 446-452 ◽  
Author(s):  
J.V. Allaby ◽  
U. Amaldi ◽  
G. Barbiellini ◽  
M. Baubillier ◽  
F. Bergsma ◽  
...  
Keyword(s):  
Precise Determination ◽  
Neutrino Scattering ◽  
Mixing Angle ◽  
Electroweak Mixing Angle

scholarly journals Determination of the Σ-Λ mixing angle from QCD sum rules

2016 ◽  
Vol 2016 (8) ◽  
Author(s):  
T. M. Aliev ◽  
T. Barakat ◽  
M. Savcı
Keyword(s):  
Sum Rules ◽  
Qcd Sum Rules ◽  
Mixing Angle

scholarly journals Determination of the effective electroweak mixing angle from Z decays

1993 ◽  
Vol 309 (3-4) ◽  
pp. 451-462 ◽  
Author(s):  
O. Adriani ◽  
M. Aguilar-Benitez ◽  
S. Ahlen ◽  
J. Alcaraz ◽  
A. Aloisio ◽  
...  
Keyword(s):  
Mixing Angle ◽  
Z Decays ◽  
Electroweak Mixing Angle

scholarly journals Prospects for Neutrino Oscillation Physics

2013 ◽  
Vol 2013 ◽  
pp. 1-29 ◽  
Author(s):  
Silvia Pascoli ◽  
Thomas Schwetz
Keyword(s):  
Neutrino Oscillation ◽  
Mass Hierarchy ◽  
Lepton Sector ◽  
Neutrino Mass Hierarchy ◽  
Mixing Angle ◽  
Long Baseline ◽  
Reactor Neutrinos ◽  
Near Term

Recently the last unknown lepton mixing angleθ13has been determined to be relatively large, not too far from its previous upper bound. This opens exciting possibilities for upcoming neutrino oscillation experiments towards addressing fundamental questions, among them the type of the neutrino mass hierarchy and the search for CP violation in the lepton sector. In this paper we review the phenomenology of neutrino oscillations, focusing on subleading effects, which will be the key towards these goals. Starting from a discussion of the present determination of three-flavour oscillation parameters, we give an outlook on the potential of near-term oscillation physics as well as on the long-term program towards possible future precision oscillation facilities. We discuss accelerator-driven long-baseline experiments as well as nonaccelerator possibilities from atmospheric and reactor neutrinos.

scholarly journals The decay mode ω→e+e− and a direct determination of the ω-ϕ mixing angle

1968 ◽  
Vol 57 (2) ◽  
pp. 404-412 ◽  
Author(s):  
D. Bollini ◽  
A. Buhler-Broglin ◽  
P. Dalpiaz ◽  
T. Massam ◽  
F. Navach ◽  
...  
Keyword(s):  
Decay Mode ◽  
Direct Determination ◽  
Mixing Angle
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