Results 31 to 40 of about 737,184 (280)
First-Principles Calculation of Electroweak Box Diagrams from Lattice QCD. [PDF]
Physical Review Letters, 2020 We present the first realistic lattice QCD calculation of the γW-box diagrams relevant for beta decays. The nonperturbative low-momentum integral of the γW loop is calculated using a lattice QCD simulation, complemented by the perturbative QCD result at ...
Xu Feng +4 more
semanticscholar +1 more source
Computing the magnetic field response of the proton [PDF]
EPJ Web of Conferences, 2020 Background field methods offer an approach through which fundamental non-perturbative hadronic properties can be studied. Lattice QCD is the only ab initio method with which Quantum Chromodynamics can be studied at low energies; it involves numerically ...
Bignell Ryan +2 more
doaj +1 more source
Electrical conductivity of the quark-gluon plasma: perspective from lattice QCD [PDF]
European Physical Journal A, 2020 A discussion on the electrical conductivity of the quark-gluon plasma as determined by lattice QCD is given. After a reminder of basic definitions and expectations, various methods for spectral reconstruction are reviewed, including the use of Ansätze ...
G. Aarts, A. Nikolaev
semanticscholar +1 more source
Nuclear Physics A, 2009 8 pages, 6 figures, A plenary talk given at The International Conference on Particle And Nuclei (PANIC08), Eilat, Israel, November 9-14 ...
openaire +2 more sources
Inclusive Semileptonic Decays from Lattice QCD. [PDF]
Physical Review Letters, 2020 We develop a method to compute the inclusive semileptonic decay rate of hadrons fully nonperturbatively using lattice QCD simulations. The sum over all possible final states is achieved by a calculation of the forward-scattering matrix elements on the ...
Paolo Gambino, S. Hashimoto
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Light-meson leptonic decay rates in lattice QCD+QED [PDF]
Physical Review D, 2019 The leading electromagnetic (e.m.) and strong isospin-breaking corrections to the $\pi^+ \to \mu^+ \nu[\gamma]$ and $K^+ \to \mu^+ \nu[\gamma]$ leptonic decay rates are evaluated for the first time on the lattice.
M. Carlo +7 more
semanticscholar +1 more source
Vacuum correlators at short distances from lattice QCD
Journal of High Energy Physics, 2021 Non-perturbatively computing the hadronic vacuum polarization at large photon virtualities and making contact with perturbation theory enables a precision determination of the electromagnetic coupling at the Z pole, which enters global electroweak fits ...
Marco Cè +4 more
doaj +1 more source
Effective charge from lattice QCD [PDF]
Chinese Physics C, High Energy Physics & Nuclear Physics, 2019 Using lattice configurations for quantum chromodynamics (QCD) generated with three domain-wall fermions at a physical pion mass, we obtain a parameter-free prediction of QCD’s renormalisation-group-invariant process-independent effective charge, .
Zhu-Fang Cui +9 more
semanticscholar +1 more source
Light-Cone Parton Distribution Functions from Lattice QCD. [PDF]
Physical Review Letters, 2018 We extract parton distribution functions (PDFs) of the nucleon from lattice QCD using an ensemble of gauge field configurations simulated with light quark masses fixed to their physical values.
C. Alexandrou +5 more
semanticscholar +1 more source
Lattice QCD investigation of a doubly-bottom b¯b¯ud tetraquark with quantum numbers I(JP)=0(1+) [PDF]
Physical Review D, 2019 We use lattice QCD to investigate the spectrum of the $\bar{b} \bar{b} u d$ four-quark system with quantum numbers $I(J^P) = 0(1^+)$. We use five different gauge-link ensembles with $2+1$ flavors of domain-wall fermions, including one at the physical ...
L. Leskovec +3 more
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