## Hadron Structure in Electroweak Precision MeasurementsThis thesis examines the γZ box contribution to the weak charge of the proton. Here, by combining recent parity-violating electron-deuteron scattering data with our current understanding of parton distribution functions, the author shows that one can limit this model dependence. The resulting construction is a robust model of the γγ and γZ structure functions that can also be used to study a variety of low-energy phenomena. Two such cases are discussed in this work, namely, the nucleon’s electromagnetic polarizabilities and quark-hadron duality. By using phenomenological information to constrain the input structure functions, this important but previously poorly understood radiative correction is determined at the kinematics of the parity-violating experiment, QWEAK, to a degree of precision more than twice that of the previous best estimate. A detailed investigation into available parametrizations of the electromagnetic and interference cross-sections indicates that earlier analyses suffered from the inability to correctly quantify their model dependence. |

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### Contents

1 | |

5 | |

3 Precision Tests of the SM | 19 |

4 Structure Functions | 31 |

5 AdelaideJefferson LabManitoba Model | 48 |

6 The γZV Correction | 71 |

7 Electric and Magnetic Polarisabilities of the Proton | 92 |

8 QuarkHadron Duality | 103 |

9 Summary and Conclusion | 115 |

Appendix A
Further Determinations of e VγZ | 118 |