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Effective Field Theories in the Study of K_L → π^+π^-e^+e^- and Heavy Quark Fragmentation


Elwood, John Kenneth (1997) Effective Field Theories in the Study of K_L → π^+π^-e^+e^- and Heavy Quark Fragmentation. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/vzrw-t659.


This thesis examines several situations in which effective field theories may be used to generate perturbative predictions for nonperturbative phenomena. The decay mode KL → π+π-e+e- is analyzed in great detail using chiral perturbation theory, and the form factors for the decay are determined, along with the sizes of various CP violating observables. One of these variables turns out to be quite sizeable, approaching 20% for appropriate cuts on the lepton pair invariant mass. Fragmentation of a c quark to the excited charmed baryon doublet Λ*c is also studied within the framework of a chiral theory, and various decay distributions are expressed in terms of nonperturbative fragementation parameters. A perturbative calculation of related fragmentation parameters is also briefly discussed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Wise, Mark B.
Group:Caltech Theory
Thesis Committee:
  • Unknown, Unknown
Defense Date:17 July 1996
Record Number:CaltechTHESIS:08072017-112244341
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10370
Deposited By: Benjamin Perez
Deposited On:07 Aug 2017 20:19
Last Modified:16 Apr 2021 23:24

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