The Paschos-Wolfenstein relation in a hadronic picture
arXiv:nucl-th/0603047 · doi:10.1103/PhysRevC.74.065501
Abstract
The Paschos-Wolfenstein (PW) relation joins neutral- and charged-current neutrino- and antineutrino-induced cross sections into an expression that depends on the weak mixing angle . Contrary to the traditional approach with partonic degrees of freedom, we adopt a model built on hadronic degrees of freedom to perform a study of the PW relation at intermediate energies (100 MeV to 2 GeV). With upcoming high-statistics scattering experiments such as MINERA and FINeSSE, a scrutiny of the PW relation is timely. Employing a relativistic Glauber nucleon knockout model for the description of quasielastic neutrino-nucleus reactions, the influence of nuclear effects on the PW relation is investigated. We discuss nuclear-model dependences and show that the PW relation is a robust ratio, mitigating the effect of final-state interactions, for example to the 1% level. The role played by a possible strangeness content of the nucleon is investigated. It appears that the uncertainties arising from the poorly known strangeness parameters and the difficulties in nuclear modelling seriously limit the applicability of the PW relation as an intermediate-energy electroweak precision tool. On the other hand, we show that nuclear effects may be sufficiently well under control to allow the extraction of new information on the axial strangeness parameter. Results are presented for and .
revised version, 23 pages, 10 figures, 1 table, accepted for publication in Phys. Rev. C
References in corpus (28)
- A Precise Determination of Electroweak Parameters in Neutrino-Nucleon Scattering
- Precision Measurement of the Weak Mixing Angle in Moller Scattering
- Strange Quark Contributions to Parity-Violating Asymmetries in the Forward G0 Electron-Proton Scattering Experiment
- Weak mixing angle at low energies
- Old and new physics interpretations of the NuTeV anomaly
- Constraints on the Nucleon Strange Form Factors at Q^2 ~ 0.1 GeV^2
- Reconciliation of the Measurement of Parity-Nonconservation in Cs with the Standard Model
- On the Effect of Asymmetric Strange Seas and Isospin-Violating Parton Distribution Functions on sin2thetaW Measured at NuTeV
- Electroweak Radiative Corrections To Polarized Møller Scattering Asymmetries
- Relativistic models for quasi-elastic neutrino scattering
- Relativistic formulation of Glauber theory for A(e,e'p) reactions
- Inelastic neutrino and antineutrino scattering on nuclei and ``strangeness'' of the nucleon
- Electroweak radiative corrections to deep-inelastic neutrino scattering - implications for NuTeV ?
- Probing Nucleon Strangeness with Neutrinos: Nuclear Model Dependences
- Neutrino-nucleus quasi-elastic scattering and strange quark effects
- The ratio of p and n yields in NC neutrino(antineutrino)-nucleus scattering and strange form factors of the nucleon
- An improved direct measurement of leptonic coupling asymmetries with polarized Z bosons
- Strange form factors of the proton: a new analysis of the neutrino (antineutrino) data of the BNL-734 experiment
- Paschos-Wolfenstein Relationship for Nuclei and the NuTeV sin^2(theta_W) Measurement
- Electroweak Tests at Beta-beams
- Precision Measurement of sin^2 theta_W at a Reactor
- Strange-quark contribution to the ratio of neutral- to charged-current cross sections in neutrino-nucleus scattering
- Supersymmetric Effects in Deep Inelastic Neutrino-Nucleus Scattering
- NuTeV anomaly and nuclear parton distributions revisited
- Parity-Violation With Electrons: Theoretical Perspectives
- Measurement of the b quark forward-backward asymmetry around the Z0 peak using an inclusive tag
- Helicity asymmetries in neutrino-nucleus interactions
- Don't Forget to Measure