Short-distance matrix elements for D-meson mixing for 2+1 flavor lattice QCD

"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 a² tadpole-improved staggered sea quarks and tadpole-improved L\""uscher-Weisz gluons. We use the a² 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}"

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Chang, Chia Cheng

Contributors dc:contributor

• El-Khadra, Aida
• Stone, Michael
• Kronfeld, Andreas
• Pitts, Kevin
• Ryu, Shinsei

• lattice quantum chromodynamics (QCD)
• D-meson mixing
• flavor physics

Statement dc:rights

• Copyright 2015 Chia Cheng Chang

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/78432

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/78432