83 research outputs found
Calculation of CP Violation in Non-leptonic Kaon Decay on the Lattice
We give a progress report of our lattice calculation of direct and indirect
CP violation in kaon decays, parametrized as and ,
which require non-perturbative calculation of the matrix elements of the
Standard Model effective Hamiltonian.Comment: Talk presented at CIPANP2003, New York City, May 19-24, 2003, 4
pages, 5 eps figure
Hadronic matrix elements of proton decay on the lattice
We report on our on-going project to calculate proton decay matrix elements
using domain-wall fermions on the lattice. By summarizing the history of the
proton decay calculation on the lattice, we reveal the systematic errors of
those calculations. Then we discuss our approach to tackle those uncertainties
and show our preliminary results on the matrix elements.Comment: 4 pages, 2 figures, talk presented at CIPANP2003: Conference on the
Intersections of Particle and Nuclear Physics, New York City, May 19-24, 200
Heavy quark thermodynamics in full QCD
We analyze the large-distance behaviour of static quark-anti-quark pair
correlations in QCD. The singlet free energy is calculated and the entropy
contribution to it is identified allowing us to calculate the excess internal
energy. The free energy has a sharp drop in the critical region, leading to
sharp peaks in both excess entropy and internal energy.Comment: talk given at Quark Matter 200
Transition temperature in QCD with physical light and strange quark masses
We present results from a calculation of the transition temperature in QCD
with two light and one heavier (strange) quark mass on lattices with temporal
extent N_t =4 and 6. Calculations with improved staggered fermions have been
performed with a strange quark mass fixed close to its physical value and for
various light to strange quark mass ratios that correspond to light
pseudo-scalar masses in the range (150-500) MeV. From a combined extrapolation
to the chiral (m_l -> 0) and continuum (aT -> 0) limits we obtain for the
transition temperature at the physical point T_c = 192(7)(4) MeV.
We also present first results from an ongoing calculation of the QCD equation
of state with almost realistic light and strange quark masses.Comment: 4 pages, 4 figures, to appear in the proceedings of the 19th
International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions,
Shanghai, Nov. 200
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