Hadron Structure in Electroweak Precision Measurements

✍ Scribed by Nathan L. Hall (auth.)

• Publisher: Springer International Publishing
• Year: 2016
• Tongue: English
• Leaves: 127
• Series: Springer Theses
• Edition: 1
• Category: Library

✦ Synopsis

This 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.

✦ Table of Contents

Front Matter....Pages i-xiv
Motivation and Outline....Pages 1-4
Introduction to the Standard Model and Beyond....Pages 5-18
Precision Tests of the SM....Pages 19-30
Structure Functions....Pages 31-47
Adelaide-Jefferson Lab-Manitoba Model....Pages 49-69
The (\square _{\gamma Z}^V) Correction....Pages 71-91
Electric and Magnetic Polarisabilities of the Proton....Pages 93-102
Quark-Hadron Duality....Pages 103-113
Summary and Conclusion....Pages 115-117
Back Matter....Pages 119-120

✦ Subjects

Elementary Particles, Quantum Field Theory; Theoretical, Mathematical and Computational Physics