Dynamical twisted mass fermions with light quarks

Boucaud, Ph.; Dimopoulos, P.; Farchioni, F.; Frezzotti, R.; Gimenez, V. Castillo; Herdoíza, Gregorio; Jansen, Karl; Lubicz, V.; Martinelli, G.; McNeile, Craig; Michael, C.; Montvay, I.; Palao, David Val; Papinutto, Mauro; Pickavance, J.; Rossi, G.C.; Scorzato, L.; Shindler, Andrea; Simula, Silvano; Urbach, Carsten; Wenger, Urs

doi:10.1016/j.physletb.2007.04.054

Cited by 161 publications

(164 citation statements)

References 62 publications

Supporting

Mentioning

157

Contrasting

Order By: Relevance

“…This is comparable to our statistical uncertainty, and the same holds if we vary α within a reasonable range of values. 4 Our best result for the renormalization group invariant condensate from the lattices c1 and c3 is for the combination (ν 1 , ν 2 ) = (1, 2), while from lattice c2 is for (2, 3):…”

Section: Extraction Of the Low-energy Constantmentioning

confidence: 86%

See 1 more Smart Citation

Spontaneous chiral symmetry breaking in QCD: a finite-size scaling study on the lattice

Giusti¹,

Necco²

2007

J. High Energy Phys.

View full text Add to dashboard Cite

Spontaneous chiral symmetry breaking in QCD with massless quarks at infinite volume can be seen in a finite box by studying, for instance, the dependence of the chiral condensate from the volume and the quark mass. We perform a feasibility study of this program by computing the quark condensate on the lattice in the quenched approximation of QCD at small quark masses. We carry out simulations in various topological sectors of the theory at several volumes, quark masses and lattice spacings by employing fermions with an exact chiral symmetry, and we focus on observables which are infrared stable and free from mass-dependent ultraviolet divergences. The numerical calculation is carried out with an exact variance-reduction technique, which is designed to be particularly efficient when spontaneous symmetry breaking is at work in generating a few very small low-lying eigenvalues of the Dirac operator. The finite-size scaling behaviour of the condensate in the topological sectors considered agrees, within our statistical accuracy, with the expectations of the chiral effective theory. Close to the chiral limit we observe a detailed agreement with the first Leutwyler-Smilga sum rule. By comparing the mass, the volume and the topology dependence of our results with the predictions of the chiral effective theory, we extract the corresponding low-energy constant.

show abstract

Section: Extraction Of the Low-energy Constantmentioning

confidence: 86%

“…Figure 6: On the left, the ratios (χ ν1 − χ ν2 )/(χ 1 − χ 3 ) as a function of the quark mass for the lattice c1 and for (ν 1 , ν 2 ) = (1, 2), (1,4), (1,5). The points at m = 0 represent the theoretical expectations from the Leutwyler-Smilga sum rule in eq.…”

Section: Jhep04(2007)090mentioning

confidence: 99%

Spontaneous chiral symmetry breaking in QCD: a finite-size scaling study on the lattice

Giusti¹,

Necco²

2007

J. High Energy Phys.

View full text Add to dashboard Cite

show abstract

“…[43]- [45] and implemented in refs. [46] and [47]) to guarantee the O(a)-improvement of physical observables and get rid of all the unwanted leading chirally enhanced cutoff effects. In the gauge sector the tree-level improved action proposed in ref.…”

Section: Sea and Valence Quark Regularizationmentioning

confidence: 99%

Kaon mixing beyond the SM from Nf = 2 tmQCD and model independent constraints from the UTA

Bertone

Carrasco

Ciuchini

et al. 2013

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

We present the first unquenched, continuum limit, lattice QCD results for the matrix elements of the operators describing neutral kaon oscillations in extensions of the Standard Model. Owing to the accuracy of our calculation on ∆S = 2 weak Hamiltonian matrix elements, we are able to provide a refined Unitarity Triangle analysis improving the bounds coming from model independent constraints on New Physics. In our nonperturbative computation we use a combination of N f = 2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks in order to achieve both O(a)-improvement and continuum-like renormalization properties for the relevant four-fermion operators. The calculation of the renormalization constants has been performed non-perturbatively in the RI-MOM scheme. Based on simulations at four values of the lattice spacing and a number of quark masses we have extrapolated/interpolated our results to the continuum limit and physical light/strange quark masses.

show abstract

“…The calculation is based on the N f = 2 gauge field configurations generated by the European Twisted Mass (ETM) Collaboration with the tree-level improved Symanzik gauge action [9] and the twisted mass quark action [10] at maximal twist, discussed in detail in [11][12][13][14][15][16][17]. We simulated N f = 2 mass-degenerate dynamical quarks, whose mass is eventually extrapolated to the physical isospin averaged mass of the up and down quarks, m u/d .…”

Section: Jhep01(2012)046 2 Simulation Detailsmentioning

confidence: 99%

“…For the quark mass renormalization constants Z µ = Z −1 P we use the results obtained in [7], i.e. Z P (MS, 2 GeV) = {0.411 (12), 0.437(7), 0.477(6), 0.501(20)} at the four beta values (see also [18] for the estimate of Z P at β = 4.20).…”

Section: Jhep01(2012)046 2 Simulation Detailsmentioning

confidence: 99%

Lattice QCD determination of m b , f B and f Bs with twisted mass Wilson fermions

Dimopoulos

Frezzotti

Herdoíza

et al. 2012

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Dynamical twisted mass fermions with light quarks

Cited by 161 publications

References 62 publications

Spontaneous chiral symmetry breaking in QCD: a finite-size scaling study on the lattice

Spontaneous chiral symmetry breaking in QCD: a finite-size scaling study on the lattice

Kaon mixing beyond the SM from Nf = 2 tmQCD and model independent constraints from the UTA

Lattice QCD determination of m b , f B and f Bs with twisted mass Wilson fermions

Contact Info

Product

Resources

About