Publications (29)
The eta' meson from lattice QCD
ETM Collaboration, K. Jansen, C. Michael +1
We study the flavour singlet pseudoscalar mesons from first principles using lattice QCD. With N_f=2 flavours of light quark, this is the so-called eta_2 meson and we discuss the p…
K^0-\bar{K}^0 Mixing Beyond the SM from Nf=2 tmQCD
ETM Collaboration, P. Dimopoulos, R. Frezzotti +8
We present preliminary results on the of neutral kaon oscillations in extensions of the Standard Model. Using Nf=2 maximally twisted sea quarks and Osterwalder-Seiler valence quark…
Lambda_msbar from the static potential for QCD with n_f=2 dynamical quark flavors
ETM Collaboration, Karl Jansen, Felix Karbstein +2
We determine Lambda_msbar for QCD with n_f=2 dynamical quark flavors by fitting the Q-Q-bar static potential known analytically in the perturbative regime up to terms of O(alpha_s^…
Computing K and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
ETM Collaboration, Remi Baron, Philippe Boucaud +13
We discuss the computation of the mass of the K and D mesons within the framework of N_f = 2+1+1 twisted mass lattice QCD from a technical point of view. These quantities are essen…
First Physics Results at the Physical Pion Mass from Wilson Twisted Mass Fermions at Maximal Twist
ETM Collaboration, A. Abdel-Rehim, C. Alexandrou +20
We present physics results from simulations of QCD using dynamical Wilson twisted mass fermions at the physical value of the pion mass. These simulations were enabled by…
Scaling and low energy constants in lattice QCD with N_f=2 maximally twisted Wilson quarks
ETM Collaboration, P. Dimopoulos, R. Frezzotti +3
We report on the scaling of basic hadronic observables in lattice QCD with N_f=2 maximally twisted Wilson dynamical quarks. We give preliminary results for some of the Gasser-Leutw…
Pseudoscalar decay constants of kaon and D-mesons from Nf=2 twisted mass Lattice QCD
B. Blossier, P. Dimopoulos, R. Frezzotti +12
We present the results of a lattice QCD calculation of the pseudoscalar meson decay constants fpi, fK, fD and fDs, performed with Nf=2 dynamical fermions. The simulation is carried…
Mass of the b-quark and B-decay constants from Nf=2+1+1 twisted-mass Lattice QCD
ETM Collaboration, A. Bussone, N. Carrasco +9
We present precise lattice computations for the b-quark mass, the quark mass ratios mb/mc and mb/ms as well as the leptonic B-decay constants. We employ gauge configurations with f…
Kaon and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
ETM Collaboration, Remi Baron, Philippe Boucaud +12
We discuss the computation of the kaon and D meson masses in the N_f = 2+1+1 twisted mass lattice QCD setup, where explicit heavy flavor and parity breaking occurs at finite lattic…
Lattice QCD determination of m_b, f_B and f_Bs with twisted mass Wilson fermions
ETM Collaboration, P. Dimopoulos, R. Frezzotti +10
We present a lattice QCD determination of the b quark mass and of the B and B_s decay constants, performed with N_f=2 twisted mass Wilson fermions, by simulating at four values of…
First results with two light flavours of quarks with maximally twisted mass
Karl Jansen, Carsten Urbach, ETM Collaboration
We report on first results of an ongoing effort to simulate lattice QCD with two degenerate flavours of quarks by means of the twisted mass formulation tuned to maximal twist. By u…
The static-light meson spectrum from twisted mass lattice QCD
ETM Collaboration, Karl Jansen, Chris Michael +2
We compute the static-light meson spectrum with N_f = 2 flavours of sea quarks using Wilson twisted mass lattice QCD. We consider five different values for the light quark mass cor…
Light quark masses and pseudoscalar decay constants from Nf=2 Lattice QCD with twisted mass fermions
B. Blossier, Ph. Boucaud, P. Dimopoulos +15
We present the results of a lattice QCD calculation of the average up-down and strange quark masses and of the light meson pseudoscalar decay constants with Nf=2 dynamical fermions…
Baryon masses with dynamical twisted mass fermions
ETM Collaboration, Constantia Alexandrou, Tomasz Korzec +9
We present results on the mass of the nucleon and the using two dynamical degenerate twisted mass quarks. The evaluation is performed at four quark masses corresponding to a p…
Average up/down, strange and charm quark masses with Nf=2 twisted mass lattice QCD
ETM Collaboration, B. Blossier, P. Dimopoulos +6
We present a high precision lattice calculation of the average up/down, strange and charm quark masses performed with Nf=2 twisted mass Wilson fermions. The analysis includes data…
Lattice calculation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} with dynamical quarks
ETM Collaboration, Benoit Blossier, Marc Wagner +1
We perform a dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} at zero recoil. We consider three different light quark masses corresponding to 300 M…
Neutral mesons and disconnected diagrams in Twisted Mass QCD
ETM Collaboration, Chris Michael, Carsten Urbach
We evaluate properties of neutral mesons in Nf=2 dynamical simulations of TMQCD at maximal twist. The pion is explored - establishing the size of the isospin splitting (an order a^…
Static-static-light-light tetraquarks in lattice QCD
ETM Collaboration, Marc Wagner
I report on a lattice computation of the energy of a system of two light quarks and two static antiquarks as a function of the separation of the static antiquarks. In terms of hadr…
f_B and f_Bs with maximally twisted Wilson fermions
ETM Collaboration, B. Blossier, P. Dimopoulos +13
We present a lattice QCD calculation of the heavy-light decay constants f_B and f_Bs performed with Nf=2 maximally twisted Wilson fermions, at four values of the lattice spacing. T…
Static-light meson masses from twisted mass lattice QCD
ETM Collaboration, Karl Jansen, Chris Michael +2
We compute the static-light meson spectrum using two-flavor Wilson twisted mass lattice QCD. We have considered five different values for the light quark mass corresponding to 300…
Decay constants from twisted mass QCD
ETM Collaboration, P. Dimopoulos, C. McNeile +3
We present results for chiral extrapolations of the mass and decay constants of the rho meson. The data sets used are the nf=2 unquenched gauge configurations generated with twiste…
The continuum limit of the static-light meson spectrum
ETM Collaboration, Chris Michael, Andrea Shindler +1
We investigate the continuum limit of the low lying static-light meson spectrum using Wilson twisted mass lattice QCD with N_f = 2 dynamical quark flavours. We consider three value…
Pseudo-scalar meson form factors with maximally twisted Wilson fermions at Nf = 2
ETM Collaboration, S. Simula
We present preliminary results for various electroweak form factors of pseudo-scalar mesons using the tree-level improved Symanzik gauge action and the maximally twisted mass fermi…
Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
Remi Baron, Philippe Boucaud, Jaume Carbonell +17
We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (N_f = 2+1+1) dynamical quarks using Wilson twisted mass fermions at…
Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details
Ph. Boucaud, P. Dimopoulos, F. Farchioni +16
In a recent paper [hep-lat/0701012] we presented precise lattice QCD results of our European Twisted Mass Collaboration (ETMC). They were obtained by employing two mass-degenerate…
Lattice QCD with light twisted quarks: first results
Andrea Shindler, ETM Collaboration
I report on first results of the ETMC obtained simulating lattice QCD with two degenerate flavours of Wilson twisted mass fermions, for which physical observables are automatically…
The omega-rho meson mass splitting and mixing from lattice QCD
ETM Collaboration, C. McNeile, C. Michael +1
We compare flavour singlet and non-singlet vector mesons from first principles using lattice QCD. With N_f=2 flavours of light quark, this addresses the omega-rho mass difference.…
Dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2}
ETM Collaboration, Benoit Blossier, Marc Wagner +1
We perform a two-flavor dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} at zero recoil in the static limit. We find tau_{1/2}(1) = 0.297(26) and t…
BK-parameter from Nf = 2 twisted mass lattice QCD
ETM Collaboration, M. Constantinou, P. Dimopoulos +12
We present an unquenched lattice computation of the parameter which controls oscillations. A partially quenched setup is employed with two maximally…