scholarly journals PreciseMS¯light-quark masses from lattice QCD in the regularization invariant symmetric momentum-subtraction scheme

2010 ◽  
Vol 82 (11) ◽  
Author(s):  
Martin Gorbahn ◽  
Sebastian Jäger
Keyword(s):  
Lattice Qcd ◽  
Light Quark ◽  
Subtraction Scheme ◽  
Quark Masses

scholarly journals DK I = 0, $$ D\overline{K} $$ I = 0, 1 scattering and the $$ {D}_{s0}^{\ast } $$(2317) from lattice QCD

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Gavin K. C. Cheung ◽  
◽  
Christopher E. Thomas ◽  
David J. Wilson ◽  
Graham Moir ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Scattering Amplitudes ◽  
Lattice Qcd ◽  
Finite Volume ◽  
Energy Region ◽  
Light Quark ◽  
Bound State ◽  
Vector Resonance ◽  
Quark Masses ◽  
Partial Waves

Abstract Elastic scattering amplitudes for I = 0 DK and I = 0, 1 $$ D\overline{K} $$ D K ¯ are computed in S, P and D partial waves using lattice QCD with light-quark masses corresponding to mπ = 239 MeV and mπ = 391 MeV. The S-waves contain interesting features including a near-threshold JP = 0+ bound state in I = 0 DK, corresponding to the $$ {D}_{s0}^{\ast } $$ D s 0 ∗ (2317), with an effect that is clearly visible above threshold, and suggestions of a 0+ virtual bound state in I = 0 $$ D\overline{K} $$ D K ¯ . The S-wave I = 1 $$ D\overline{K} $$ D K ¯ amplitude is found to be weakly repulsive. The computed finite-volume spectra also contain a deeply-bound D* vector resonance, but negligibly small P -wave DK interactions are observed in the energy region considered; the P and D-wave $$ D\overline{K} $$ D K ¯ amplitudes are also small. There is some evidence of 1+ and 2+ resonances in I = 0 DK at higher energies.

scholarly journals LIGHT QUARK MASSES: A STATUS REPORT AT DPF 2000

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 591-599 ◽  
Author(s):  
Rajan Gupta ◽  
Kim Maltman
Keyword(s):  
Lattice Qcd ◽  
Light Quark ◽  
Status Report ◽  
Quark Masses ◽  
Coherent Picture

A summary of the extraction of light quark masses from both QCD sumrules and lattice QCD simulations is presented. The focus is on providing a careful statement of the potential weaknesses in each calculation, and on integrating the work of different collaborations to provide a coherent picture.

scholarly journals D → Klv semileptonic decay using lattice QCD with HISQ at physical pion masses

2018 ◽  
Vol 175 ◽  
pp. 13027 ◽  
Author(s):  
Bipasha Chakraborty ◽  
Christine Davies ◽  
Jonna Koponen ◽  
G Peter Lepage
Keyword(s):  
Standard Model ◽  
Lattice Qcd ◽  
Semileptonic Decay ◽  
Light Quark ◽  
Form Factors ◽  
New Physics ◽  
Ckm Matrix ◽  
Quark Masses ◽  
The Standard Model ◽  
Fertile Ground

he quark flavor sector of the Standard Model is a fertile ground to look for new physics effects through a unitarity test of the Cabbibo-Kobayashi-Maskawa (CKM) matrix. We present a lattice QCD calculation of the scalar and the vector form factors (over a large q2 region including q2 = 0) associated with the D→ Klv semi-leptonic decay. This calculation will then allow us to determine the central CKM matrix element, Vcs in the Standard Model, by comparing the lattice QCD results for the form factors and the experimental decay rate. This form factor calculation has been performed on the Nf = 2 + 1 + 1 MILC HISQ ensembles with the physical light quark masses.

scholarly journals Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD

2016 ◽  
Vol 2016 (12) ◽  
Author(s):  
Gavin K.C. Cheung ◽  
◽  
Cian O’Hara ◽  
Graham Moir ◽  
Michael Peardon ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Light Quark ◽  
D Meson ◽  
Quark Masses

Lattice QCD with light quark masses: Does chiral symmetry get broken spontaneously?

1983 ◽  
Vol 127 (6) ◽  
pp. 433-439 ◽  
Author(s):  
I.M. Barbour ◽  
J.P. Gilchrist ◽  
H. Schneider ◽  
G. Schierholz ◽  
M. Teper
Keyword(s):  
Lattice Qcd ◽  
Chiral Symmetry ◽  
Light Quark ◽  
Quark Masses

scholarly journals Precise Charm to Strange Mass Ratio and Light Quark Masses from Full Lattice QCD

2010 ◽  
Vol 104 (13) ◽  
Author(s):  
C. T. H. Davies ◽  
C. McNeile ◽  
K. Y. Wong ◽  
E. Follana ◽  
R. Horgan ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Light Quark ◽  
Mass Ratio ◽  
Quark Masses

scholarly journals Light meson form factors at high Q2 from lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 06015 ◽  
Author(s):  
Jonna Koponen ◽  
André Zimermmane-Santos ◽  
Christine Davies ◽  
G. Peter Lepage ◽  
Andrew Lytle
Keyword(s):  
Lattice Qcd ◽  
Theoretical Calculations ◽  
Light Quark ◽  
Form Factors ◽  
Hadron Structure ◽  
Strange Quarks ◽  
Pion Scattering ◽  
Quark Masses ◽  
Systematic Uncertainties ◽  
Atomic Electrons

Measurements and theoretical calculations of meson form factors are essential for our understanding of internal hadron structure and QCD, the dynamics that bind the quarks in hadrons. The pion electromagnetic form factor has been measured at small space-like momentum transfer |q2| < 0.3 GeV2 by pion scattering from atomic electrons and at values up to 2.5 GeV2 by scattering electrons from the pion cloud around a proton. On the other hand, in the limit of very large (or infinite) Q2 = −q2, perturbation theory is applicable. This leaves a gap in the intermediate Q2 where the form factors are not known. As a part of their 12 GeV upgrade Jefferson Lab will measure pion and kaon form factors in this intermediate region, up to Q2 of 6 GeV2. This is then an ideal opportunity for lattice QCD to make an accurate prediction ahead of the experimental results. Lattice QCD provides a from-first-principles approach to calculate form factors, and the challenge here is to control the statistical and systematic uncertainties as errors grow when going to higher Q2 values. Here we report on a calculation that tests the method using an ηs meson, a ’heavy pion’ made of strange quarks, and also present preliminary results for kaon and pion form factors. We use the nf = 2 + 1 + 1 ensembles made by the MILC collaboration and Highly Improved Staggered Quarks, which allows us to obtain high statistics. The HISQ action is also designed to have small dicretisation errors. Using several light quark masses and lattice spacings allows us to control the chiral and continuum extrapolation and keep systematic errors in check.

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