scholarly journals Simulating twisted mass fermions at physical light, strange, and charm quark masses

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
Constantia Alexandrou ◽  
Simone Bacchio ◽  
Panagiotis Charalambous ◽  
Petros Dimopoulos ◽  
Jacob Finkenrath ◽  
...  
Keyword(s):  
Charm Quark ◽  
Quark Masses ◽  
Twisted Mass

scholarly journals HVP contributions to the muon (g−2) including QED corrections with twisted-mass fermions

2018 ◽  
Vol 175 ◽  
pp. 06006
Author(s):  
Davide Giusti ◽  
Vittorio Lubicz ◽  
Guido Martinelli ◽  
Francesco Sanfilippo ◽  
Silvano Simula
Keyword(s):  
Lattice Spacing ◽  
Pion Mass ◽  
Charm Quark ◽  
Leading Order ◽  
Lattice Calculation ◽  
Charm Quarks ◽  
Quark Masses ◽  
Mass Collaboration ◽  
Twisted Mass ◽  
The Continuum

We present a lattice calculation of the Hadronic Vacuum Polarization (HVP) contribution of the strange and charm quarks to the anomalous magnetic moment of the muon including leading-order electromagnetic (e.m.) corrections. We employ the gauge configurations generated by the European Twisted Mass Collaboration (ETMC) with Nf = 2+1 + 1 dynamical quarks at three values of the lattice spacing (a ≃ 0.062,0.082,0.089 fm) with pion masses in the range Mπ ≃ 210 - 450 MeV. The strange and charm quark masses are tuned at their physical values. Neglecting discon-nected diagrams and after the extrapolations to the physical pion mass and to the continuum limit we obtain: [see formula in PDF] and [see formula in PDF] for the strange and charm contributions, respectively.!

scholarly journals Quenched twisted mass QCD at small quark masses and in large volume

2002 ◽  
Vol 106-107 ◽  
pp. 260-262 ◽  
Author(s):  
M. Della Morte ◽  
R. Frezzotti ◽  
J. Heitger
Keyword(s):  
Large Volume ◽  
Quark Masses ◽  
Twisted Mass

scholarly journals 3-point functions from twisted mass lattice QCD at small quark masses

2005 ◽  
Author(s):  
Karl Jansen ◽  
Stefano Capitani ◽  
Mauro Papinutto ◽  
Andrea Shindler ◽  
Ines Wetzorke ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Quark Masses ◽  
Twisted Mass

scholarly journals A determination of the average up-down, strange and charm quark masses at $N_f=2+1+1$

2014 ◽  
Author(s):  
Paolo Lami ◽  
Nuria Carrasco Vela ◽  
Petros Dimopoulos ◽  
Roberto Frezzotti ◽  
Vittorio Lubicz ◽  
...  
Keyword(s):  
Charm Quark ◽  
Quark Masses

scholarly journals Determination of the charm quark mass in lattice QCD with 2 + 1 flavours on fine lattices

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Jochen Heitger ◽  
Fabian Joswig ◽  
Simon Kuberski
Keyword(s):  
Lattice Qcd ◽  
Quark Mass ◽  
Charm Quark ◽  
Renormalisation Group ◽  
Tree Level ◽  
Lattice Action ◽  
Group Invariant ◽  
Quark Masses ◽  
Charm Quark Mass

Abstract We present a determination of the charm quark mass in lattice QCD with three active quark flavours. The calculation is based on PCAC masses extracted from Nf = 2 + 1 flavour gauge field ensembles at five different lattice spacings in a range from 0.087 fm down to 0.039 fm. The lattice action consists of the O(a) improved Wilson-clover action and a tree-level improved Symanzik gauge action. Quark masses are non-perturbatively O(a) improved employing the Symanzik-counterterms available for this discretisation of QCD. To relate the bare mass at a specified low-energy scale with the renormalisation group invariant mass in the continuum limit, we use the non-pertubatively known factors that account for the running of the quark masses as well as for their renormalisation at hadronic scales. We obtain the renormalisation group invariant charm quark mass at the physical point of the three-flavour theory to be Mc = 1486(21) MeV. Combining this result with five-loop perturbation theory and the corresponding decoupling relations in the $$ \overline{\mathrm{MS}} $$ MS ¯ scheme, one arrives at a result for the renormalisation group invariant charm quark mass in the four-flavour theory of Mc(Nf = 4) = 1548(23) MeV, where effects associated with the absence of a charmed, sea quark in the non-perturbative evaluation of the QCD path integral are not accounted for. In the $$ \overline{\mathrm{MS}} $$ MS ¯ scheme, and at finite energy scales conventional in phenomenology, we quote $$ {m}_{\mathrm{c}}^{\overline{\mathrm{MS}}} $$ m c MS ¯ ($$ {m}_{\mathrm{c}}^{\overline{\mathrm{MS}}} $$ m c MS ¯ ; Nf = 4) = 1296(19) MeV and $$ {m}_{\mathrm{c}}^{\overline{\mathrm{MS}}} $$ m c MS ¯ (3 GeV; Nf = 4) = 1007(16) MeV for the renormalised charm quark mass.

scholarly journals Connected and disconnected contributions to nucleon axial form factors using Nf = 2 twisted mass fermions at the physical point

2018 ◽  
Vol 175 ◽  
pp. 06003 ◽  
Author(s):  
Constantia Alexandrou ◽  
Martha Constantinou ◽  
Kyriakos Hadjiyiannakou ◽  
Karl Jansen ◽  
Christos Kallidonis ◽  
...  
Keyword(s):  
Ground State ◽  
Pion Mass ◽  
Charm Quark ◽  
Form Factors ◽  
Physical Point ◽  
Twisted Mass ◽  
Axial Form ◽  
Wilson Fermions ◽  
Quark Loops

We present results on the isovector and isoscalar nucleon axial form factors including disconnected contributions, using an ensemble of Nf = 2 twisted mass cloverimproved Wilson fermions simulated with approximately the physical value of the pion mass. The light disconnected quark loops are computed using exact deflation, while the strange and the charm quark loops are evaluated using the truncated solver method. Techniques such as the summation and the two-state fits have been employed to access ground-state dominance.

scholarly journals Twisted mass lattice QCD with non-degenerate quark masses

2006 ◽  
Vol 2006 (08) ◽  
pp. 085-085 ◽  
Author(s):  
Gernot Münster ◽  
Tobias Sudmann
Keyword(s):  
Lattice Qcd ◽  
Quark Masses ◽  
Twisted Mass

scholarly journals Simulation of an ensemble of Nf = 2 + 1 + 1 twisted mass cloverimproved fermions at physical quark masses

2018 ◽  
Vol 175 ◽  
pp. 02003 ◽  
Author(s):  
Jacob Finkenrath ◽  
Constantia Alexandrou ◽  
Simone Bacchio ◽  
Panagiotis Charalambous ◽  
Petros Dimopoulos ◽  
...  
Keyword(s):  
Pion Mass ◽  
Mass Difference ◽  
Target System ◽  
General Strategy ◽  
Decay Constants ◽  
Quark Masses ◽  
Twisted Mass ◽  
Kaon Mass ◽  
Physical Mass ◽  
The Moment

We present a general strategy aimed at generating Nf = 2+1+1 configurations with quarks at their physical mass using maximally twisted mass fermions to ensure automatic O(a) improvement, in the presence of a clover term tuned to reduce the charged to neutral pion mass difference. The target system, for the moment, is a lattice of size 643 × 128 with a lattice spacing a ~ 0:08 fm. We show preliminary results on the pion and kaon mass and decay constants.

scholarly journals Quark masses and decay constants in $N_f=2+1+1$ isoQCD with Wilson clover twisted mass fermions

2020 ◽  
Author(s):  
Garofalo Marco ◽  
Georg Bergner ◽  
Petros Dimopoulos ◽  
Jacob Finkenrath ◽  
Enrico Fiorenza ◽  
...  
Keyword(s):  
Decay Constants ◽  
Quark Masses ◽  
Twisted Mass

scholarly journals Quark masses using twisted-mass fermion gauge ensembles

2021 ◽  
Vol 104 (7) ◽  
Author(s):  
C. Alexandrou ◽  
S. Bacchio ◽  
G. Bergner ◽  
M. Constantinou ◽  
M. Di Carlo ◽  
...  
Keyword(s):  
Quark Masses ◽  
Twisted Mass
Sign in / Sign up

Export Citation Format

Share Document