Isospin Breaking in Kaon Decays to Pions

Fredrik Borg

Isospin Breaking in Kaon Decays to Pions

Fredrik Borg

Forskningsoutput: Avhandling › Doktorsavhandling (sammanläggning)

Sammanfattning

Popular Abstract in Swedish
Amplituden för fem olika processer av typen K -> 3 Pi och tre olika av K -> 2 Pi har beräknats i kiral störningsteori. Beräkningen har genomförts flera gånger med olika approximationer. Först används isospin-approximationen, men detta resulterar i diskrepanser mellan teori och experiment. I följande beräkningar tas isospin-approximationen bort i två steg, för att se om denna är förklaringen till uppkomna diskrepanser.

Arbetet motiveras dels genom dess kontroll av den kirala störningsteorin och dels genom resulterande bestämning av några fria parametrar i teorin.

Originalspråk	engelska
Kvalifikation	Doktor
Tilldelande institution
Handledare	Bijnens, Johan, handledare
Tilldelningsdatum	2005 jan. 28
Förlag	KFS AB
ISBN (tryckt)	91-628-6347-9
Status	Published - 2005

Bibliografisk information

Defence details

Date: 2005-01-28
Time: 10:30
Place: Department of Theoretical Physics Lund University Sölvegatan 14A SE - 223 62 Lund, Sweden

External reviewer(s)

Name: Pich, Antonio
Title: Professor
Affiliation: University of Valencia

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Ämnesklassifikation (UKÄ)

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title = "Isospin Breaking in Kaon Decays to Pions",

abstract = "The five different K -> 3 Pi and the three K -> 2 Pi decays are calculated in Chiral Perturbation Theory. The calculation is done using different approximations, to study whether this changes the result significantly. First the isospin approximation is used. Discrepancies are then found between theory and experiment. Further calculations without the isospin approximation are then done to see if this solves the found problems. The purpose is two-fold. To test the validity of Chiral Perturbation Theory and to fix some of the unknown parameters in the theory.",

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AB - The five different K -> 3 Pi and the three K -> 2 Pi decays are calculated in Chiral Perturbation Theory. The calculation is done using different approximations, to study whether this changes the result significantly. First the isospin approximation is used. Discrepancies are then found between theory and experiment. Further calculations without the isospin approximation are then done to see if this solves the found problems. The purpose is two-fold. To test the validity of Chiral Perturbation Theory and to fix some of the unknown parameters in the theory.

KW - Elementary particle physics

KW - termodynamik

KW - statistisk fysik

KW - gravitation

KW - relativitet

KW - kvantmekanik

KW - thermodynamics

KW - Matematisk och allmän teoretisk fysik

KW - Pseudo-scalar meson

KW - Isospin Breaking

KW - Chiral Perturbation Theory

KW - Mathematical and general theoretical physics

KW - classical mechanics

KW - quantum mechanics

KW - relativity

KW - statistical physics

KW - Weak Interaction

KW - Strong Interaction

KW - kvantfältteori

KW - High energy interactions

KW - Kärnfysik

KW - Nuclear physics

KW - klassisk mekanik

KW - quantum field theory

KW - cosmic rays

KW - Kosmisk strålning

KW - högenergi

KW - Elementarpartikelfysik

M3 - Doctoral Thesis (compilation)

SN - 91-628-6347-9

PB - KFS AB

ER -

Isospin Breaking in Kaon Decays to Pions

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