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Meson Properties in Partially Quenched Effective Field Theory

Danielsson, Niclas LU (2006)
Abstract (Swedish)
Popular Abstract in Swedish

Masskorrektioner och sönderfallskonstanter för lätta mesoner har beräknats i kiral störningsteori med extra sjökvarkar.



Beräkningarna för de laddade mesonmassorna har genomförts till tredje ordningen, först för degenererade kvarkmassor, och sedan, i ett andra projekt, för det generella fallet. Ytterligare en beräkning visar att en resummering av ofysikaliska dubbelpoler hos de neutrala propagatorerna i teorin med extra sjökvarkar möjliggör för bestämmande av lågenergikonstanterna som behövs för att beräkna den fysikaliska massan hos eta-mesonen.



Slutligen har elektromagnetiska korrektioner inkluderats i teorin i form av dynamiska fält, och hur de påverkar... (More)
Popular Abstract in Swedish

Masskorrektioner och sönderfallskonstanter för lätta mesoner har beräknats i kiral störningsteori med extra sjökvarkar.



Beräkningarna för de laddade mesonmassorna har genomförts till tredje ordningen, först för degenererade kvarkmassor, och sedan, i ett andra projekt, för det generella fallet. Ytterligare en beräkning visar att en resummering av ofysikaliska dubbelpoler hos de neutrala propagatorerna i teorin med extra sjökvarkar möjliggör för bestämmande av lågenergikonstanterna som behövs för att beräkna den fysikaliska massan hos eta-mesonen.



Slutligen har elektromagnetiska korrektioner inkluderats i teorin i form av dynamiska fält, och hur de påverkar massor och sönderfallskonstanter har sedan beräknats till andra ordningen. Konsekvenser av detta för anpassning av dessa resultat till numeriska simuleringar av kvantkromodynamik har också studerats. (Less)
Abstract
Mass corrections and decay constants for light mesons have been calculated in Partially Quenched Chiral Perturbation Theory.



The calculations of the charged meson masses have been performed to third order, first for degenerate quark masses, and then, in a second project, for the general case. Another calculation also shows that a resummation of unphysical double poles in the neutral propagators of the partially quenched theory allows for the determination of the low-energy constants needed to determine the physical eta mass.



Finally, electromagnetic corrections are included into the theory as dynamical fields and their effects on the masses and decay constants of the charged mesons have been calculated... (More)
Mass corrections and decay constants for light mesons have been calculated in Partially Quenched Chiral Perturbation Theory.



The calculations of the charged meson masses have been performed to third order, first for degenerate quark masses, and then, in a second project, for the general case. Another calculation also shows that a resummation of unphysical double poles in the neutral propagators of the partially quenched theory allows for the determination of the low-energy constants needed to determine the physical eta mass.



Finally, electromagnetic corrections are included into the theory as dynamical fields and their effects on the masses and decay constants of the charged mesons have been calculated to second order. Some consequences concerning the fitting of these results to Lattice QCD simulations are also considered. (Less)
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author
supervisor
opponent
  • Professor Golterman, Maarten, San Francisco State University, USA
organization
publishing date
type
Thesis
publication status
published
subject
keywords
statistical physics, gravitation, relativity, quantum mechanics, classical mechanics, Mathematical and general theoretical physics, Fysik, Chiral Perturbation Theory, masses, decay constants, Physics, electromagnetic interactions, Strong interactions, pseudoscalar mesons, thermodynamics, Matematisk och allmän teoretisk fysik, klassisk mekanik, kvantmekanik, relativitet, statistisk fysik, termodynamik
pages
185 pages
defense location
Lecture hall F, Fysicum, Sölvegatan 14A, Lunds Tekniska Högskola
defense date
2006-12-19 10:15
ISBN
91-628-7012-2
language
English
LU publication?
yes
id
d76f2f99-ed14-4abd-a069-389fdedc2610 (old id 547648)
date added to LUP
2007-09-28 09:50:44
date last changed
2016-09-19 08:45:18
@misc{d76f2f99-ed14-4abd-a069-389fdedc2610,
  abstract     = {Mass corrections and decay constants for light mesons have been calculated in Partially Quenched Chiral Perturbation Theory.<br/><br>
<br/><br>
The calculations of the charged meson masses have been performed to third order, first for degenerate quark masses, and then, in a second project, for the general case. Another calculation also shows that a resummation of unphysical double poles in the neutral propagators of the partially quenched theory allows for the determination of the low-energy constants needed to determine the physical eta mass.<br/><br>
<br/><br>
Finally, electromagnetic corrections are included into the theory as dynamical fields and their effects on the masses and decay constants of the charged mesons have been calculated to second order. Some consequences concerning the fitting of these results to Lattice QCD simulations are also considered.},
  author       = {Danielsson, Niclas},
  isbn         = {91-628-7012-2},
  keyword      = {statistical physics,gravitation,relativity,quantum mechanics,classical mechanics,Mathematical and general theoretical physics,Fysik,Chiral Perturbation Theory,masses,decay constants,Physics,electromagnetic interactions,Strong interactions,pseudoscalar mesons,thermodynamics,Matematisk och allmän teoretisk fysik,klassisk mekanik,kvantmekanik,relativitet,statistisk fysik,termodynamik},
  language     = {eng},
  pages        = {185},
  title        = {Meson Properties in Partially Quenched Effective Field Theory},
  year         = {2006},
}