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A06: Theory Heavy quark physics from lattice QCD

A06: Theory Heavy quark physics from lattice QCD. Sinya AOKI Graduate School of Pure and Applied Sciences University of Tsukuba. Fourth Workshop on Mass Origin and Supersymmetry Physics March 6-8, 2006, Tsukuba, Japan. Introduction. Determination of CKM matrix from experiments.

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A06: Theory Heavy quark physics from lattice QCD

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  1. A06: TheoryHeavy quark physics from lattice QCD • Sinya AOKI • Graduate School of Pure and Applied Sciences • University of Tsukuba Fourth Workshop on Mass Origin and Supersymmetry Physics March 6-8, 2006, Tsukuba, Japan

  2. Introduction Determination of CKM matrix from experiments Theoretical (non-perturbative) estimates are required for these. Lattice QCD !

  3. Problem of lattice QCD for b quark Methods so far Research in this project Aoki-Kuramashi-Tominaga Aoki-Kayaba-Kuramashi Aoki-Kayaba-Kuramashi Aoki-Kayaba-Kuramashi Aoki-Kuramashi

  4. On-shell improvement program for massive quark Aoki-Kuramashi-Tominaga Aoki-Kayaba-Kuramashi

  5. continuum limit lattice spacing Aoki-Kayaba-Kuramashi CP-PACS

  6. b quark in our method (quenched QCD) Aoki-Kuramashi heavy-heavy meson

  7. hyperfine splitting(heavy-heavy) Vector Pseudo Scalar Old Scalings are better in new method, best in new(non-perturbative)

  8. decay constant (heavy-strange) Old Old New method is as good as old one. Continuum limit can be taken in new method

  9. b quark mass quark masses can NOT be measured experimentally. New, from HH New, from HL scaling is better in heavy-heavy case HH and HL seem to agree in the continuum limit

  10. Conclusions and Discussions • Studied new proposal for bottom as well as charm quarks • new method works for charm quark • decay constant of charm-strange meson has been obtained in the continuum limit of full QCD • new method also works for bottom quark • better than old one in heavy-heavy mesons • as good as old one in heavy-light mesons • Future works: continuum limit of b quark physics • meson masses and decay constants, quark mass • full QCD(NF =2 and 2+1) as well as quenched QCD

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