Ratio of kaon and pion leptonic decay constants with N f = 2 + 1 + 1 Wilson-clover twisted-mass fermions
Constantia Alexandrou,Constantia Alexandrou,Simone Bacchio,Georg Bergner,P. Dimopoulos,Jacob Finkenrath,Roberto Frezzotti,M. Garofalo,M. Garofalo,Bartosz Kostrzewa,Giannis Koutsou,P. Labus,Francesco Sanfilippo,Silvano Simula,Martin Ueding,Carsten Urbach,Urs Wenger +16 more
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In this article, the ratio of kaon and pion leptonic decay constants in isosymmetric QCD (ISOQCD) was determined by using the gauge ensembles produced by the Extended Twisted Mass Collaboration with the Wilson-clover twisted-mass quarks.Abstract:
We present a determination of the ratio of kaon and pion leptonic decay constants in isosymmetric QCD (ISOQCD), ${f}_{K}/{f}_{\ensuremath{\pi}}$, making use of the gauge ensembles produced by the Extended Twisted Mass Collaboration with ${N}_{f}=2+1+1$ flavors of Wilson-clover twisted-mass quarks, including configurations close to the physical point for all dynamical flavors. The simulations are carried out at three values of the lattice spacing ranging from $\ensuremath{\sim}0.068$ to $\ensuremath{\sim}0.092\text{ }\text{ }\mathrm{fm}$ with linear lattice size up to $L\ensuremath{\sim}5.5\text{ }\text{ }\mathrm{fm}$. The scale is set by the particle data group (PDG) value of the pion decay constant, ${f}_{\ensuremath{\pi}}^{\text{ISO}\mathrm{QCD}}=130.4(2)\text{ }\text{ }\mathrm{MeV}$, at the ISOQCD pion point, ${M}_{\ensuremath{\pi}}^{\text{ISO}\mathrm{QCD}}=135.0(2)\text{ }\text{ }\mathrm{MeV}$, obtaining for the gradient-flow scales the values ${w}_{0}=0.17383(63)\text{ }\text{ }\mathrm{fm}$, $\sqrt{{t}_{0}}=0.14436(61)\text{ }\text{ }\mathrm{fm}$ and ${t}_{0}/{w}_{0}=\phantom{\rule{0ex}{0ex}}0.11969(62)\text{ }\text{ }\mathrm{fm}$. The data are analyzed within the framework of SU(2) chiral perturbation theory without resorting to the use of renormalized quark masses. At the ISOQCD kaon point ${M}_{K}^{\text{ISO}\mathrm{QCD}}=494.2(4)\text{ }\text{ }\mathrm{MeV}$ we get $({f}_{K}/{f}_{\ensuremath{\pi}}{)}^{\text{ISO}\mathrm{QCD}}=1.1995(44)$, where the error includes both statistical and systematic uncertainties. Implications for the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{us}|$ and for the first-row Cabibbo-Kobayashi-Maskawa unitarity are discussed.read more
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Window observable for the hadronic vacuum polarization contribution to the muon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:math> from lattice QCD
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Lattice calculation of the short and intermediate time-distance hadronic vacuum polarization contributions to the muon magnetic moment using twisted-mass fermions
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Determination of the light, strange and charm quark masses using twisted mass fermions.
C. Alexandrou,Simone Bacchio,Georg Bergner,Martha Constantinou,M. Di Carlo,Petros Dimopoulos,Jacob Finkenrath,E. Fiorenza,R. Frezzotti,M. Garofalo,K. Hadjiyiannakou,Bartosz Kostrzewa,G. Koutsou,Karl Jansen,V. Lubicz,M. Mangin-Brinet,Floriano Manigrasso,G. Martinelli,Ferenc Pittler,G. C. Rossi,Francesco Sanfilippo,Silvano Simula,Cecilia Tarantino,Antonino Todaro,Carsten Urbach,Urs Wenger +25 more
TL;DR: In this paper, the light, strange and charm quark masses were analyzed using twisted mass fermion ensembles at three values of the lattice spacing, including two fermions simulated with the physical value of the pion mass.
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TL;DR: The review as discussed by the authors summarizes much of particle physics and cosmology using data from previous editions, plus 3,283 new measurements from 899 Japers, including the recently discovered Higgs boson, leptons, quarks, mesons and baryons.
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CP Violation in the Renormalizable Theory of Weak Interaction
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