Date Awarded

Spring 2022

Document Type

Thesis

Degree Name

Doctor of Philosophy (Ph.D.)

Department

Physics

Advisor

Jozef Dudek

Committee Member

Konstantinos Orginos

Committee Member

Justin Stevens

Committee Member

Michael Kordosky

Committee Member

Robert Edwards

Abstract

In this dissertation, we use lattice quantum chromodynamics to explore the radiative transitions of πK to K, to calculate the radiative width of the resonant K*(892) which appears in the P-wave πK → γK transition amplitude. The matrix elements are extracted from three-point functions calculated in a finite-volume discretized lattice with a pion mass of 284 MeV. The finite-volume amplitudes, which are constrained over a large number of πK energy points and four-momentum transfers, are mapped to the infinite volume transition amplitude by using the Lellouch-Lüscher formalism. The radiative width is determined to be 35(8) keV by analytically continuing the amplitude into the complex energy plane and calculating the residue at the K* pole.

DOI

https://doi.org/10.21220/xj1s-pw61

Rights

© The Author

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