Testing the Standard Model by precision measurement of the weak charges of quarks

Abstract

In a global analysis of the latest parity-violating electron scattering measurements on nuclear targets, we demonstrate a significant improvement in the experimental knowledge of the weak neutral-current lepton-quark interactions at low energy. The precision of this new result, combined with earlier atomic parity-violation measurements, places tight constraints on the size of possible contributions from physics beyond the Standard Model. Consequently, this result improves the lower-bound on the scale of relevant new physics to ~1 TeV.

4 pages, 3 figures; v2: further details on extraction of electroweak parameters, new figure

References in corpus (22)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Indications of Neutrino Oscillation in a 250 km Long-baseline Experiment
• A Precise Determination of Electroweak Parameters in Neutrino-Nucleon Scattering
• Violations of fundamental symmetries in atoms and tests of unification theories of elementary particles
• Measurement of the 6S-7S transition polarizablility in atomic cesium and an improved test of the standard model
• Intermediate-Energy Semileptonic Probes of the Hadronic Neutral Current
• 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
• Measurement of Strange Quark Contributions to the Nucleon's Form Factors at Q^2=0.230 (GeV/c)^2
• The Strange Quark Contribution to the Proton's Magnetic Moment
• Precision Measurements of the Nucleon Strange Form Factors at Q^2 ~0.1 GeV^2
• Evidence for Strange Quark Contributions to the Nucleon's Form Factors at $Q^2$ = 0.108 (GeV/c)${}^2$
• Parity-Violating Electron Scattering from 4He and the Strange Electric Form Factor of the Nucleon
• Precise determination of the strangeness magnetic moment of the nucleon
• Constraints on the Nucleon Strange Form Factors at Q^2 ~ 0.1 GeV^2
• The Nucleon Anapole Moment and Parity-Violating ep Scattering
• Extracting nucleon strange and anapole form factors from world data
• The Weak Charge of the Proton and New Physics
• Parity-violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor
• Low Energy Tests of the Weak Interaction
• Strange Electric Form Factor of the Proton

Cited by in corpus (51)

• Improved Constraints on Z' Bosons from Electroweak Precision Data
• Precision Measurement of the Weak Charge of the Proton
• Review of two-photon exchange in electron scattering
• Electron Ion Collider: The Next QCD Frontier - Understanding the glue that binds us all
• First Determination of the Weak Charge of the Proton
• Low Energy Measurements of the Weak Mixing Angle
• Constraints on two-lepton, two quark operators
• The Weak Neutral Current
• Precision Constraints on Extra Fermion Generations
• Constraining quark angular momentum through semi-inclusive measurements
• Global Analysis of General SU(2) x SU(2) x U(1) Models with Precision Data
• Model-dependence of the $\gamma Z$ dispersion correction to the parity-violating asymmetry in elastic $ep$ scattering
• Standard Model tests with trapped radioactive atoms
• gamma-Z corrections to forward-angle parity-violating e-p scattering
• Parity-Violating Electron Scattering and the Electric and Magnetic Strange Form Factors of the Nucleon
• Nucleon strangeness form factors from N_f=2+1 clover fermion lattice QCD
• Dispelling the curse of the neutron skin in atomic parity violation
• Charge Symmetry at the Partonic Level
• Searching for Lee-Wick Gauge Bosons at the LHC
• Calculation of parity nonconserving amplitude and other properties of Ra+
• Strange magnetic form factor of the proton at $Q^2=0.23$ GeV${}^2$
• Weak Polarized Electron Scattering
• Parity violation and electric dipole moments in atoms and molecules
• Detailed analysis of two-boson exchange in parity-violating e-p scattering
• Parity Violation in Elastic Electron-Nucleon Scattering: Strangeness Content in the Nucleon
• Confronting Top AFB with Parity Violation Constraints
• Strange quark asymmetry in the proton in chiral effective theory
• Nuclear neutron radius and weak mixing angle measurements from latest COHERENT CsI and atomic parity violation Cs data
• Global analysis of parity-violating asymmetry data for elastic electron scattering
• The Spin of the Proton
• Precision Probes of a Leptophobic Z' Boson
• Mass-matrix ansatz and constraints on $B_s^0-{\bar{B}}_s^0$ mixing in 331 models
• Linear Stark Shifts to Measure the Fr Weak Nuclear Charge with Small Atom Samples
• Form factors and other measures of strangeness in the nucleon
• Spin and orbital angular momentum of the proton
• Leptophobic Z' Boson and Parity-Violating eD Scattering
• Chiral Effective Theory Methods and their Application to the Structure of Hadrons from Lattice QCD
• Quantum metrology to probe atomic parity nonconservation
• Hadronic gamma-Z box corrections in M\oller scattering
• Charge Symmetry Violation in the Electromagnetic Form Factors of the Proton
• Top quark forward-backward asymmetry in R-parity violating supersymmetry
• Physics perspectives at JLab with a polarized positron beam
• Challenges in the extraction of physics beyond the Standard Model from electron scattering
• Unravelling strange quarks in nucleon structure
• Hard exclusive scattering at Jlab
• From Hadronic Parity Violation to Parity-Violating Electron Scattering and Tests of the Standard Model
• Early Results from the Qweak Experiment
• Charge symmetry violation in the determination of strangeness form factors
• Q-weak: First Direct Measurement of the Weak Charge of the Proton
• Overview of Issues Surrounding Strangeness in the Nucleon
• Fundamental Symmetries and Conservation Laws