Publications (110)
Scaling and ChPT Description of Pions from N_f=2 twisted mass QCD
P. Dimopoulos, R. Frezzotti, G. Herdoiza +3
We study light-quark observables by means of dynamical lattice QCD simulations using two flavours of twisted mass fermions at maximal twist. We employ chiral perturbation theory to…
Quark mass dependence of hadron masses from lattice QCD
UKQCD Collaboration, M. Foster, C. Michael
We discuss lattice methods to obtain the derivatives of a lattice meson mass with respect to the bare sea and valence quark masses. Applications are made to quenched and dynamical…
Hybrid mesons from quenched QCD
P. Lacock, C. Michael, P. Boyle +1
We use lattice methods to evaluate from first principles the spectrum of hybrid mesons produced by gluonic excitations in quenched QCD with quark masses near the strange quark mass…
Is the up-quark massless?
UKQCD Collaboration, A. C. Irving, C. McNeile +3
We report on determinations of the low-energy constants alpha5 and alpha8 in the effective chiral Lagrangian at O(p^4), using lattice simulations with N_f=2 flavours of dynamical q…
Two heavy-light mesons on a lattice
UKQCD Collaboration, C. Michael, P. Pennanen
The potential between two heavy-light mesons as a function of the heavy quark separation is calculated in quenched SU(3) lattice QCD. We study the case of heavy-light mesons with a…
Topography of the cooled vacuum
P. S. Spencer, C. Michael
We investigate the {\it topography\/} of the \o3 vacuum after various degrees of under-relaxed cooling, using the na\"ıve action density and geometric and field theoretical defini…
Cooling and the SU(2) Instanton Vaccuum
C. Michael, P. S. Spencer
We present results of an investigation into the nature of instantons in 4-dimensional pure gauge lattice \ obtained from configurations which have been cooled using an under…
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…
Efficient Hadronic Operators in Lattice Gauge Theory
P. Lacock, A. McKerrell, C. Michael +2
We study operators to create hadronic states made of light quarks in quenched lattice gauge theory. We construct non-local gauge-invariant operators which provide information about…
Hadronic decay of a scalar B meson from the lattice
UKQCD Collaboration, C. McNeile, C. Michael +1
We explore the transitions B to B and B to B K from lattice QCD with flavours of sea quark, using the static approximation for the heavy quark. We eval…
The radial distributions of a heavy-light meson on a lattice
J. Koponen, A. M. Green, C. Michael +1
In an earlier work, the charge (vector) and matter (scalar) radial distributions of heavy-light mesons were measured in the quenched approximation on a 16^3 times 24 lattice with a…
QCD from the Lattice
C. Michael
The lattice gauge theory technique for non-perturbative calculations in QCD is reviewed. The extraction of the continuum limit of lattice results is discussed with particular examp…
Hadronic decays
C. Michael
Hadronic decays and transitions are a key ingredient of hadronic physics. I discuss how hadronic decays can be explored in lattice gauge theory and review studies undertaken. I als…
Four-quark systems
P. Pennanen, A. M. Green, C. Michael
In order to understand the binding of four static quarks, flux distributions corresponding to these binding energies are studied in quenched SU(2) and also related to a model for t…
Light hadrons from Nf=2+1+1 dynamical twisted mass fermions
R. Baron, B. Blossier, P. Boucaud +15
We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (Nf=2+1+1) dynamical quarks using Wilson twisted mass fermions at ma…
Instanton size distributions from calibrated cooling
C. Michael, P. S. Spencer
Using an under-relaxed cooling algorithm we investigated the vacuum in the model and pure gauge . We calibrated the amount of cooling performed to have simil…
Is the Quenched Spectrum in agreement with Experiment?
P. Lacock, C. Michael
We analyse the meson spectrum in quenched QCD using lattice gauge theory. By studying hadron propagation with a variety of operators (both smeared and local), we are able to extrac…
Beyond the quark model of hadrons from lattice QCD
C. Michael
Lattice QCD can give direct information on OZI-violating contributions to mesons. Here we explore the contributions that split flavour singlet and non-singlet meson masses. I discu…
The effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD
UKQCD Collaboration, H. P. Shanahan, C. T. H. Davies +10
We compute the light hadron mass spectrum at beta=5.7 using the O(a) improved Sheikholeslami-Wohlert (SW) fermion action with two choices of the clover coefficient: the classical v…
A lattice study of the masses of singlet 0++ mesons
UKQCD Collaboration, A. Hart, C. McNeile +2
We compute the masses of the flavour singlet 0++ mesons using (n_f=2) unquenched lattice QCD with the Iwasaki and Wilson gauge actions. Both fermionic and glueball interpolating op…
The eta and eta' mesons from lattice QCD
C. Michael
Lattice QCD allows a first-principles study of QCD with the freedom to vary the number and masses of the quarks. I present results on the flavour singlet correlations (this illumin…
Twisted mass fermions: neutral pion masses from disconnected contributions
F. Farchioni, K. Jansen, C. McNeile +12
Twisted mass fermions allow light quarks to be explored but with the consequence that there are mass splittings, such as between the neutral and charged pion. Using a direct calcul…
Decay width of light quark hybrid meson from the lattice
C. McNeile, C. Michael
Lattice QCD with flavours of sea quark is used to explore the spectrum and decay of a spin-exotic hybrid meson. We test lattice determination of S-wave deca…
Electron and ion heating characteristics during magnetic reconnection in MAST
H. Tanabe, T. Yamada, T. Watanabe +16
Local electron and ion heating characteristics during merging reconnection startup on the MAST spherical tokamak have been revealed for the first time using a 130 channel YAG-TS sy…
The Structure of Flux-tubes in SU(2)
A. M. Green, C. Michael, P. S. Spencer
The spatial distribution of the action and energy in the colour fields of flux-tubes is studied in lattice SU(2) field theory for static quarks at separations up to 1 fm. Special a…
Lattice sum rules for the colour fields
C. Michael
We analyse the sum rules describing the action and energy in the colour fields around glueballs, torelons and static potentials.
Fitting Correlated Hadron Mass Spectrum Data
C. Michael, A. McKerrell
We discuss fitting hadronic Green functions versus time to extract mass values in quenched lattice QCD. These data are themselves strongly correlated in . With only a limite…
Magnetic imaging of shipwrecks
C. Michael
The ferromagnetic material in a shipwreck on the seabed causes a modification to the earth's magnetic field which can be measured at the surface. Proton magnetometer measurements a…
Orbitally excited and hybrid mesons from the lattice
P. Lacock, C. Michael, P. Boyle +1
We discuss in general the construction of gauge-invariant non-local meson operators on the lattice. We use such operators to study the - and -wave mesons as well as hybrid me…
Local dependence of ion temperature gradient on magnetic configuration, rotational shear and turbulent heat flux in MAST
Y. -c. Ghim, A. R. Field, A. A. Schekochihin +3
Experimental data from the Mega Amp Spherical Tokamak (MAST) is used to show that the inverse gradient scale length of the ion temperature R/LTi (normalized to the major radius R)…
The Hyperfine Splitting in Charmonium: Lattice Computations Using the Wilson and Clover Fermion Actions
UKQCD Collaboration, C. R. Allton, C. T. Sachrajda +10
We compute the hyperfine splitting on the lattice, using both the Wilson and -improved (clover) actions for quenched quarks. The computations are performe…
The Nature of the Hadronic String
UKQCD Collaboration, C. Michael, P. W. Stephenson
We study a closed hadronic string using pure glue lattice simulation. We measure the energy of the flux state encircling the periodic boundary condition (the torelon). From these d…
The Charge and Matter radial distributions of Heavy-Light mesons calculated on a lattice with dynamical fermions
UKQCD Collaboration, A. M. Green, J. Koponen +2
A knowledge of the radial distributions of quarks inside hadrons could lead to a better understanding of the QCD description of these hadrons and possibly suggest forms for phenome…
Effects of non-perturbatively improved dynamical fermions in QCD at fixed lattice spacing
UKQCD Collaboration, C. R. Allton, S. P. Booth +17
We present results for the static inter-quark potential, lightest glueballs, light hadron spectrum and topological susceptibility using a non-perturbatively improved action on a $1…
Flavour-singlet pseudoscalar and scalar mesons
C. Michael, M. S. Foster, C. McNeile
We measure correlations appropriate for favour-singlet mesons using dynamical quark configurations from UKQCD. Improved methods of evaluating the disconnected quark diagrams are pr…
Hybrid Mesons from the Lattice
C. Michael
I review lattice QCD results for hybrid mesons, including a discussion of their hadronic decays.
Flavour Breaking Effects of Wilson twisted mass fermions
K. Jansen, C. McNeile, C. Michael +6
We study the flavour breaking effects appearing in the Wilson twisted mass formulation of lattice QCD. In this quenched study, we focus on the mass splitting between the neutral an…
The eta and eta' mesons in QCD
UKQCD Collaboration, C. McNeile, C. Michael
We study the flavour singlet pseudoscalar mesons from first principles using lattice QCD. We explore the quark content of the and mesons and we discuss their decay const…
Hadronic decay of a vector meson from the lattice
UKQCD Collaboration, C. McNeile, C. Michael
We explore the decay of a vector meson to two pseudoscalar mesons on the lattice with flavours of sea quark. Although we are working with quark masses that do not allow a p…
Maximal variance reduction for stochastic propagators with applications to the static quark spectrum
UKQCD Collaboration, C. Michael, J. Peisa
We study a new method -- maximal variance reduction -- for reducing the variance of stochastic estimators for quark propagators. We find that while this method is comparable to usu…
SU(2) Potentials from Large Lattices
The UKQCD Collaboration, S. P. Booth, A. Hulsebos +5
We measure accurate values of the inter-quark potentials on a lattice with SU(2) pure gauge theory at . The scale is set by extracting the string tension - we…
Multi-Quark Energies in SU(2) Lattice Gauge Theory
A. M. Green, C. Michael, J. E. Paton +1
Energies of four-quark systems have been extracted in a quenched SU(2) lattice Monte Carlo calculation for two different geometries, rectangular and colinear, with and lat…
String breaking in zero-temperature lattice QCD
UKQCD Collaboration, P. Pennanen, C. Michael
The crossing from a static quark-antiquark system to a system of two static-light mesons when the separation of the static quarks is increased is calculated in zero-temperature lat…
Properties of light scalar mesons from lattice QCD
C. McNeile, C. Michael
Lattice QCD with flavours of sea quark is used to explore the spectrum and decay of scalar mesons. We are able to determine the - mass difference and this leads…
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…
Quenched Hadrons using Wilson and O(a)-Improved Fermion Actions at beta=6.2
The UKQCD Collaboration, C. R. Allton, H. Duong +20
We present the first study of the light hadron spectrum and decay constants for quenched QCD using an O(a)-improved nearest-neighbour Wilson fermion action at β=6.2. We compare th…
Sum rules and 2-quark flux-tube structure
A. M. Green, P. S. Spencer, C. Michael
Sum rules -- relating the static quark potential V(R) to the spatial distribution of the action and energy in the colour fields of flux-tubes -- are applied in three ways: 1) To ex…
The decay constant of the first excited pion from lattice QCD
UKQCD Collaboration, C. McNeile, C. Michael
We review the theory that predicts that the decay constant of the excited light pseudo-scalar mesons are suppressed in the chiral limit relative to the pion decay constant. We comp…
The Running Coupling from SU(3) Lattice Gauge Theory
The UKQCD Collaboration, S. P. Booth, D. S. Henty +4
{}From an accurate determination of the inter-quark potential, one can study the running coupling constant for a range of -values and hence estimate the scale $Î_{\msbar} $. De…
Lattice Determination of the Coupling
G. M. de Divitiis, L. Del Debbio, M. Di Pierro +2
The coupling is related to the form factor at zero momentum of the axial current between and states. Moreover it is related to the effective coupling…
Light Meson Physics from Maximally Twisted Mass Lattice QCD
R. Baron, Ph. Boucaud, P. Dimopoulos +16
We present a comprehensive investigation of light meson physics using maximally twisted mass fermions for two mass-degenerate quark flavours. By employing four values of the lattic…
A lattice QCD calculation of the transverse decay constant of the b1(1235) meson
K. Jansen, C. McNeile, C. Michael +1
We review various B meson decays that require knowledge of the transverse decay constant of the b1(1235) meson. We report on an exploratory lattice QCD calculation of the transvers…
Finite size effects and scaling in lattice CP(N-1)
A. C. Irving, C. Michael
We present model predictions for the spectrum of in a periodic box and use them to interpret the strong finite size effects observed in lattice simulations at medium val…
Excited B mesons from the lattice
UKQCD Collaboration, A. M. Green, J. Koponen +3
We determine the energies of the excited states of a heavy-light meson , with a static heavy quark and light quark with mass approximately that of the strange quark from…
O(a^2) cutoff effects in lattice Wilson fermion simulations
P. Dimopoulos, R. Frezzotti, C. Michael +2
In this paper we propose to interpret the large discretization artifacts affecting the neutral pion mass in maximally twisted lattice QCD simulations as O(a^2) effects whose magnit…
Hybrid and Orbitally Excited Mesons in Quenched QCD
P. Lacock, C. Michael, P. Boyle +1
We use lattice methods to evaluate from first principles the spectrum of hybrid mesons produced by gluonic excitations in quenched QCD with quark masses near the strange quark mass…
Instanton size distribution in O(3)
C. Michael, P. S. Spencer
We present calculations of the size distribution of instantons in the 2d O(3) non-linear sigma-model, and briefly discuss the effects cooling has upon the configurations and the to…
First results of ETMC simulations with Nf=2+1+1 maximally twisted mass fermions
R. Baron, B. Blossier, P. Boucaud +15
We present first results from runs performed with Nf=2+1+1 flavours of dynamical twisted mass fermions at maximal twist: a degenerate light doublet and a mass split heavy doublet.…
Flux-tube structure and beta-functions in SU(2)
P. Pennanen, A. M. Green, C. Michael
The spatial distribution of the action and energy in the colour fields of flux-tubes is studied in lattice SU(2) field theory for static quarks at separations up to 1 fm at beta=2.…
Light baryon masses with dynamical twisted mass fermions
C. Alexandrou, R. Baron, B. Blossier +17
We present results on the mass of the nucleon and the Delta using two dynamical degenerate twisted mass quarks and the tree-level Symanzik improved gauge action. The evaluation is…
Radial Correlations between two quarks
UKQCD Collaboration, A. M. Green, J. Koponen +2
In nuclear many-body problems the short-range correlation between two nucleons is well described by the corresponding correlation in the {two}-body problem. Therefore, as a first s…
An unquenched lattice QCD calculation of the mass of the bottom quark
UKQCD Collaboration, C. McNeile, C. Michael +1
We compute the b quark mass from dynamical lattice QCD with clover quarks. The calculation is done at a fixed lattice spacing with sea quark masses as low as half the strange quark…
The Charge and Matter radial distributions of Heavy-Light mesons calculated on a lattice
UKQCD Collaboration, A. M. Green, J. Koponen +2
For a heavy-light meson with a static heavy quark, we can explore the light quark distribution. The charge and matter radial distributions of these heavy-light mesons are measured…
Light hadron spectroscopy with O(a) improved dynamical fermions
UKQCD Collaboration, C. R. Allton, S. P. Booth +12
We present the first results for the static quark potential and the light hadron spectrum using dynamical fermions at using an O(a) improved Wilson fermion action together…
Decay constants of P-wave heavy-light mesons from unquenched lattice QCD
UKQCD Collaboration, G. Herdoiza, C. McNeile +1
We review some decays that require knowledge of the decay constants of heavy-light mesons. We compute the decay constants of P-wave heavy-light mesons from unquenched latti…
Hybrid meson decay from the lattice
UKQCD Collaboration, C. McNeile, C. Michael +1
We discuss the allowed decays of a hybrid meson in the heavy quark limit. We deduce that an important decay will be into a heavy quark non-hybrid state and a light quark meson, in…
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…
η and η' mesons from Nf=2+1+1 twisted mass lattice QCD
K. Ottnad, C. Michael, S. Reker +1
We determine mass and mixing angles of eta and eta' states using Nf=2+1+1 Wilson twisted mass lattice QCD. We describe how those flavour singlet states need to be treated in this l…
Four-quark flux distribution and binding in lattice SU(2)
P. Pennanen, A. M. Green, C. Michael
The full spatial distribution of the color fields of two and four static quarks is measured in lattice SU(2) field theory at separations up to 1 fm at beta=2.4. The four-quark case…
The flavour singlet mesons in QCD
UKQCD Collaboration, C. McNeile, C. Michael +1
We study the flavour singlet mesons from first principles using lattice QCD. We explore the splitting between flavour singlet and non-singlet for vector and axial mesons as well as…
B spectroscopy using all-to-all propagators
J. Peisa, C. Michael
We measure the ground and excited states for B mesons in the static limit using maximally variance reduced estimators for light quark propagators. Because of the large number of pr…
An estimate of the flavour singlet contributions to the hyperfine splitting in charmonium
UKQCD Collaboration, C. McNeile, C. Michael
We explore the splitting between flavour singlet and non-singlet mesons in charmonium. This has implications for the hyperfine splitting in charmonium.
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…
Four-Quark Binding Energies from SU(2) Lattice Monte Carlo
A. M. Green, C. Michael, M. E. Sainio
Energies of four-quark systems have been extracted in a static quenched SU(2) lattice Monte Carlo calculation for six different geometries, both planar and non-planar, with $β=2.4…
The measurement, fitting and interpretation of the radial distributions of Heavy-Light mesons calculated on a lattice with dynamical fermions
A. M. Green, J. Koponen, P. Pennanen +1
In our earlier work, the charge and matter radial distributions of heavy-light mesons were measured on a 16^3 times 24 lattice with a lattice spacing of a = 0.17 fm and a light qua…
Non-perturbative determination of beta-functions and excited string states from lattices
C. Michael, A. M. Green, P. S. Spencer
We use lattice sum rules for the static quark potential to determine the beta-function for symmetric and asymmetric lattices non-perturbatively. We also study the colour field dist…
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.…
Quenched QCD with O(a) improvement: I. The spectrum of light hadrons
UKQCD Collaboration, K. C. Bowler, P. Boyle +9
We present a comprehensive study of the masses of pseudoscalar and vector mesons, as well as octet and decuplet baryons computed in O(a) improved quenched lattice QCD. Results have…
Hadrons with a heavy colour-adjoint particle
UKQCD Collaboration, M. Foster, C. Michael
We discuss the spectrum of hadrons with a heavy colour-adjoint particle - motivated by the gluino of supersymmetry. Using the lattice approach, we explore in detail the gluonic bou…
A Study of Degenerate Four-quark states in SU(2) Lattice Monte Carlo
A. M. Green, J. Lukkarinen, P. Pennanen +1
The energies of four-quark states are calculated for geometries in which the quarks are situated on the corners of a series of tetrahedra and also for geometries that correspond to…
Lattice study of sphaleron transitions in a 2D O(3) sigma model
J. Kripfganz, C. Michael
A lattice approach is developed to measure the sphaleron free energy. Its feasibility is demonstrated through a Monte Carlo study of the two-dimensional O(3) sigma model.
Fitting Correlated Data
C. Michael
We discuss fitting correlated data - with the example of hadron mass spectroscopy in mind. The main conclusion is that the method of minimising correlated is unreliable if t…
B-physics from the ratio method with Wilson twisted mass fermions
N. Carrasco, P. Dimopoulos, R. Frezzotti +10
We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first preliminary results for the B-mesons bag parameter. Simulations are pe…
Flux-tube Structure, Sum Rules and Beta-functions in SU(2)
A. M. Green, P. Pennanen, C. Michael
Action and energy flux-tube profiles are computed, in SU(2) with beta=2.4,2.5, for two quarks up to 1 fm apart and for which the colour fields are in their ground state (A_1g) and…
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…
Energy spectrum of a Heavy-Light meson
J. Koponen, A. M. Green, C. Michael
The energies of different angular momentum states of a heavy-light meson were measured on a lattice by Michael and Peisa in Phys. Rev. D 58, 34506 (1998). We have now repeated this…
Global Alfven Eigenmodes in the H-1 heliac
M. J. Hole, B. D. Blackwell, G. Bowden +5
Recent upgrades in H-1 power supplies have enabled the operation of the H-1 experiment at higher heating powers than previously attainable. A heating power scan in mixed hydrogen/h…
Exotics
C. Michael
We review lattice QCD results for glueballs (including a discussion of mixing with scalar mesons), hybrid mesons and other exotic states (such as molecules).
B-physics computations from Nf=2 tmQCD
N. Carrasco, M. Ciuchini, P. Dimopoulos +12
We present an accurate lattice QCD computation of the b-quark mass, the B and Bs decay constants, the B-mixing bag-parameters for the full four-fermion operator basis, as well as e…
Four-quark energies in SU(2) lattice Monte Carlo using a tetrahedral geometry
A. M. Green, J. Lukkarinen, P. Pennanen +2
This contribution -- a continuation of earlier work -- reports on recent developments in the calculation and understanding of 4-quark energies generated using lattice Monte Carlo t…
B-physics from lattice QCD...with a twist
N. Carrasco, P. Dimopoulos, R. Frezzotti +11
We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first results for the B-meson bag parameters. For our computation we employ…
Interactions of heavy-light mesons
P. Pennanen, C. Michael, A. M. Green
The potential between static-light mesons forming a meson-meson or a meson-antimeson system is calculated in quenched and unquenched SU(3) gauge theory. We use the Sheikholeslami-W…
Multi-quark energies in QCD
A. M. Green, C. Michael, J. E. Paton
Four-quark potentials for are evaluated in the static limit with the quenched approximation -- using a lattice of and . The four quarks are restrict…
A proposal for B-physics on current lattices
ETM collaboration, B. Blossier, P. Dimopoulos +11
A method to extract B-physics parameters (b-quark mass and fB, fBs decay constants) from currently available lattice data is presented and tested. The approach is based on the idea…
B_s meson excited states from the lattice
UKQCD Collaboration, A. M. Green, J. Ignatius +4
This is a follow-up to our earlier work [Phys. Rev. D 65, 014512 (2002); Eur. Phys. J. C 28, 79 (2003); Phys. Rev. D 69, 094505 (2004)] for the energies and the charge (vector) and…
Searching for chiral logs in the static-light decay constant
UKQCD Collaboration, C McNeile, C. Michael
Using the clover fermion action in unquenched QCD with pion masses as low as 420 MeV, we look for evidence for chiral logs in the static-light decay constant. There is some evidenc…
Towards a lattice determination of the coupling
G. M. de Divitiis, L. Del Debbio, M. Di Pierro +4
The coupling is related to the form factor at zero momentum of the axial current between - and -states. This form factor is evaluated on the lattice us…
Lattice QCD Study of -meson Decay Constants from ETMC
A. Bussone, N. Carrasco, P. Dimopoulos +13
We discuss a lattice QCD computation of the -meson decay constants by the ETM collaboration where suitable ratios allow to reach the bottom quark sector by combining simulations…
Scaling and chiral extrapolation of pion mass and decay constant with maximally twisted mass QCD
P. Dimopoulos, R. Frezzotti, G. Herdoiza +3
We present an update of the results for pion mass and pion decay constant as obtained by the ETM collaboration in large scale simulations with maximally twisted mass fermions and t…
Dynamical Twisted Mass Fermions with Light Quarks
Ph. Boucaud, P. Dimopoulos, F. Farchioni +19
We present results of dynamical simulations with 2 flavours of degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses from 300 to 550 MeV. The…