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  1. No Access

    Article

    Non-perturbative renormalization of quark mass in N f = 2 + 1 QCD with the Schrödinger functional scheme

    We present an evaluation of the quark mass renormalization factor for N f = 2 + 1 QCD. The Schrödinger functional scheme is employed as the intermediate...

    S. Aoki, K.-I. Ishikawa, N. Ishizuka, T. Izubuchi… in Journal of High Energy Physics (2010)

  2. No Access

    Article

    Numerical simulations with two flavours of twisted-mass Wilson quarks and DBW2 gauge action

    Discretisation errors in two-flavour lattice QCD with Wilson quarks and DBW2 gauge action are investigated by comparing numerical simulation data at two values of the bare gauge coupling. Both non-zero- and z...

    F. Farchioni, P. Hofmann, K. Jansen… in The European Physical Journal C - Particle… (2006)

  3. No Access

    Article

    The phase structure of lattice QCD with two flavors of Wilson quarks and renormalization group improved gluons

    The effect of changing the lattice action for the gluon field on the recently observed [F. Farchioni, R. Frezzotti, K. Jansen, I. Montvay, G.C. Rossi, E. Scholz, A. Shindler, N. Ukita, C. Urbach, I. Wetzorke, ...

    F. Farchioni, K. Jansen, I. Montvay… in The European Physical Journal C - Particle… (2005)

  4. No Access

    Article

    Twisted mass quarks and the phase structure of lattice QCD

    The phase structure of zero temperature twisted mass lattice QCD is investigated. We find strong metastabilities in the plaquette observable in correspondence of which the untwisted quark mass assumes positive...

    F. Farchioni, R. Frezzotti, K. Jansen… in The European Physical Journal C - Particle… (2005)

  5. No Access

    Article

    Aperture synthesis observations of HCN J=1-0 emission from Y canum venaticorum

    We have made high resolution observations of HCN (1-0) emission from the carbon star Y Canum Venaticorum using the Nobeyama Millimeter Array. We find that the emission region is not well resolved by the synthe...

    H. Izumiura, A. Fujiyoshi, N. Ukita in Astrophysics and Space Science (1995)

  6. No Access

    Article

    Molecular and low excitation emission in high mass post-main-sequence nebulae

    We have undertaken map** and spectroscopy of a broad range of type I post-Main-Sequence nebulae in COJ=1→0,J=2→1, andJ=3→2, using the 12 m antenna at Kitt Peak, and the 45 m facility of the Nobeyama Radio Obser...

    J. P. Phillips, P. G. Williams, A. Mampaso, N. Ukita in Astrophysics and Space Science (1992)