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Title: | Short-distance matrix elements for D-meson mixing for 2+1 flavor lattice QCD |
Author(s): | Chang, Chia Cheng |
Director of Research: | El-Khadra, Aida |
Doctoral Committee Chair(s): | Stone, Michael |
Doctoral Committee Member(s): | Kronfeld, Andreas; Pitts, Kevin; Ryu, Shinsei |
Department / Program: | Physics |
Discipline: | Physics |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | Ph.D. |
Genre: | Dissertation |
Subject(s): | lattice quantum chromodynamics (QCD)
D-meson mixing flavor physics |
Abstract: | We study the short-distance hadronic matrix elements for $D$-meson mixing with partially quenched $N_f=2+1$ lattice QCD. We use a large set of the MIMD Lattice Computation Collaboration's gauge configurations with $a^2$ tadpole-improved staggered sea quarks and tadpole-improved L\"uscher-Weisz gluons. We use the $a^2$ tadpole-improved action for valence light quarks and the Sheikoleslami-Wohlert action with the Fermilab interpretation for the valence charm quark. Our calculation covers the complete set of five operators needed to constrain new physics models for $D$-meson mixing. We match our matrix elements to the $\overline{\text{MS}}$-NDR scheme evaluated at 3GeV. We report values for the Beneke-Buchalla-Greub-Lenz-Nierste choice of evanescent operators and obtain \begin{align} \left<\mathcal{O}_1\right>/m_D=& 0.042(4)\text{GeV}^3, \nonumber \\ \left<\mathcal{O}_2\right>/m_D=& -0.078(4)\text{GeV}^3, \nonumber \\ \left<\mathcal{O}_3\right>/m_D=& 0.033(2)\text{GeV}^3, \nonumber \\ \left<\mathcal{O}_4\right>/m_D=& 0.155(10)\text{GeV}^3, \nonumber \\ \left<\mathcal{O}_5\right>/m_D=& 0.058(6)\text{GeV}^3.\nonumber \end{align} |
Issue Date: | 2015-04-23 |
Type: | Text |
URI: | http://hdl.handle.net/2142/78432 |
Rights Information: | Copyright 2015 Chia Cheng Chang |
Date Available in IDEALS: | 2015-07-22 |
Date Deposited: | May 2015 |
This item appears in the following Collection(s)
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Dissertations and Theses - Physics
Dissertations in Physics -
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois