D*Dpi coupling constant in 2+1 flavor lattice QCD

Download

index.pdf

Date

2012

Author

Can, Kadir Utku

Metadata

Show full item record

Item Usage Stats

171
views

94
downloads

Developments in high-performance computing instruments and advancements in the numerical algorithms combined with lattice gauge theory make it possible to simulate Quantum Chromodynamics (QCD), the theory of strongly-interacting quarks and gluons, numerically at nearly physical light-quark masses. In this work we present our results for the $D^*D\pi$ coupling constant as simulated on $32^3 \times 64$, unquenched $2+1$-flavor lattices. We estimate the coupling at the chiral limit as $g_{D^*D\pi} = 16.23 \pm 1.71$, which is in good agreement with its experimental value $g^{(exp)}_{D^*D\pi} = 17.9\pm0.3\pm1.9$ as obtained by CLEO II Collaboration.

Subject Keywords

Quantum chromodynamics., Mesons., Pulsars., Quarks., Gluons., Particles (Nuclear physics)., Lattice gauge theories.

URI

http://etd.lib.metu.edu.tr/upload/12614698/index.pdf
https://hdl.handle.net/11511/21931

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Critical points of D-dimensional extended gravities Deser, S.; Liu, Haishan; Lue, H.; Pope, C. N.; Sisman, Tahsin Cagri; Tekin, Bayram (2011-03-17) We study the parameter space of D-dimensional cosmological Einstein gravity together with quadratic curvature terms. In D < 4 there are in general two distinct (anti)-de Sitter vacua. We show that, for an appropriate choice of the parameters, there exists a critical point for one of the vacua, with only massless tensor, but neither massive tensor nor scalar, gravitons. At criticality, the linearized excitations have formally vanishing energy (as do black hole solutions). A further restriction of the paramet...
Thermal characterisation of quantum cascade lasers with Fabry Perot modes Gundogdu, Sinan; Pisheh, Hadi Sedaghat; Demir, Abdullah; Guenoven, Mete; AYDINLI, ATİLLA; Sirtori, Carlo (2018-04-26) Quantum cascade lasers are coherent light sources that rely on intrersubband transition in periodic semiconductor quantum well structures. They operate at frequencies from mid-infrared to terahertz. In cases of long wavelength and typical low thermal conductivity of the active region, temperature rise in the active region during operation is a major concern. Thermal conductivity of QCL epi-layers differ significantly from the values of bulk semiconductors and measurement of the thermal conductivity of epi-l...
Phase transition in compact QED3 and the Josephson junction Onemli, VK; Tas, M; Tekin, Bayram (2001-08-01) We study the finite temperature phase transition in 2+1 dimensional compact QED and its dual theory: Josephson junction. Duality of these theories at zero temperature was established long time ago in [1]. Phase transition in compact QED is well studied thus we employ the 'duality' to study the superconductivity phase transition in a Josephson junction. For a thick junction we obtain a critical temperature in terms of the geometrical properties of the junction.
Thermal stability of Benzorod arrays: Molecular-dynamics simulations Malcıoğlu, Osman Barış (World Scientific Pub Co Pte Lt, 2005-05-01) A set of Benzorod arrays on a graphene substrate has been investigated by performing classical molecular-dynamics simulations. Benzorod is composed of aligned and dehydrogenated benzene rings that are stacked to form a rod-like structure. It has been found that the arrays considered axe thermally stable up to elevated temperatures, with a dependence on length.
Hamiltonian for a particle in a magnetic field on a curved surface in orthogonal curvilinear coordinates Shikakhwa, M. S.; Chair, N. (2016-08-19) The Schrodinger Hamiltonian of a spin-less particle as well as the Pauli Hamiltonian with spin-orbit coupling included of a spin one-half particle in electromagnetic fields that are confined to a curved surface embedded in a three-dimensional space spanned by a general Orthogonal Curvilinear Coordinate are constructed. A new approach, based on the physical argument that upon squeezing the particle to the surface by a potential, then it is the physical gauge-covariant kinematical momentum operator (velocity ...

Citation Formats

K. U. Can, “D*Dpi coupling constant in 2+1 flavor lattice QCD,” M.S. - Master of Science, Middle East Technical University, 2012.