In this thesis, we applied Light Cone QCD sum rules
(LCSR) to several problems in meson physics. Semileptonic B-> / eta l v decays are important to get
information on Cabibbo-Kobayashi-Maskawa (CKM) matrix elements. We
calculated form factors of this decay in LCSR frame. Our results
are confirmed by later studies and these similar studies had been
used for enhancing result on b to u quark transition matrix
element of CKM matrix by BaBar collaboration. We used LCSR method
also for calculating coupling constant of radiative
rho -> / eta photon decay since the analysis of the vector
particle to pseudoscalar particle radiative decay with eta and
eta' / mesons in final state can provide insights to the long
standing issue of the eta and eta' / mixing. Our result
g_{rho eta photon}=(1.4 ± / 0.2) is very close to experimental
value g_{ rho eta photon} = (1.42 ± / 0.12). We also calculated
magnetic moment of the rho meson in LCSR frame which is an
important parameter since it is strongly related to internal
structure of hadron. Our result 2.3 ± / 0.5 in units of
(e/2m_rho), is in better agreement with lattice QCD results
than traditional QCD sum rules. Quark contents of light scalar
mesons are still under debate and we analyzed phi -> / K
K decays which is important for understanding the quark content
of the f0 meson. Our final result is g_{phi KK} = 4.9 ± / 0.8
which is in well agreement with existing experimental result
g_{phi KK} = 4.8.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12610082/index.pdf |
| Date | 01 September 2008 |
| Creators | Kanik, Inanc |
| Contributors | Savci, Mustafa |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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