Results 31 to 40 of about 89,591 (284)
The Dirac spectrum and the BEC-BCS crossover in QCD at nonzero isospin asymmetry
Particles, 2020 For large isospin asymmetries, perturbation theory predicts the quantum chromodynamic (QCD) ground state to be a superfluid phase of u and d ¯ Cooper pairs.
Bastian B. Brandt +3 more
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Generalizing the relativistic quantization condition to include all three-pion isospin channels [PDF]
Journal of High Energy Physics, 2020 We present a generalization of the relativistic, finite-volume, three-particle quantization condition for non-identical pions in isosymmetric QCD. The resulting formalism allows one to use discrete finite-volume energies, determined using lattice QCD, to
M. Hansen, F. Romero-López, S. Sharpe
semanticscholar +1 more source
Effect of isospin averaging for $ppK^-$ kaonic cluster
SciPost Physics Proceedings, 2020 The kaonic cluster $ppK^-$ is described by isospin-dependent $N{\bar K}$ potentials with significant difference between singlet and triplet components. The quasi-bound state energy of the system is calculated based on the configuration space Faddeev
Branislav Vlahovic, Igor Filikhin
doaj +1 more source
Journal of Physics A: Mathematical and Theoretical, 2013 The problem of constructing internally rotating solitons of fixed angular frequency $\omega$ in the Faddeev-Skyrme model is reformulated as a variational problem for an energy-like functional, called pseudoenergy, which depends parametrically on $\omega$.
Harland, Derek +3 more
openaire +3 more sources
Generation of isospin sum rules in heavy hadron weak decays
Journal of High Energy Physics, 2023 Isospin symmetry is the most precise flavor symmetry. In this work, we propose an approach to generate isospin sum rules for heavy hadron decays without the Wigner-Eckhart invariants. The effective Hamiltonian of heavy quark weak decay is fully invariant
Di Wang
doaj +1 more source
Hidden Spin-Isospin Exchange Symmetry [PDF]
Physical Review Letters, 2021 The strong interactions among nucleons have an approximate spin-isospin exchange symmetry that arises from the properties of quantum chromodynamics in the limit of many colors, $N_c$. However this large-$N_c$ symmetry is well hidden and reveals itself only when averaging over intrinsic spin orientations. Furthermore, the symmetry is obscured unless the
Dean Lee +10 more
openaire +5 more sources
Scattering of two and three physical pions at maximal isospin from lattice QCD [PDF]
The European Physical Journal C, 2020 We present the first direct Nf=2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin ...
M. Fischer +5 more
semanticscholar +1 more source
Electromagnetic and strong isospin-breaking corrections to the muon g−2 from lattice QCD+QED [PDF]
Physical Review D, 2019 We present a lattice calculation of the leading-order electromagnetic and strong isospin-breaking corrections to the hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon.
D. Giusti +4 more
semanticscholar +1 more source
Electromagnetic and strong isospin breaking in light meson masses
Physics Letters B, 2022 We study electromagnetic as well as strong isospin breaking effects in the isospin mass splittings of light pseudoscalar and vector mesons. To this end we employ a coupled system of quark Dyson-Schwinger and meson Bethe-Salpeter equations whose ...
Ángel S. Miramontes +3 more
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On the importance of NNLO QCD and isospin-breaking corrections in $$\varepsilon '/\varepsilon $$ [PDF]
The European Physical Journal C, 2019 Following the 1999 analysis of Gambino, Haisch and one of us, we stress that all the recent NLO analyses of $$\varepsilon '/\varepsilon $$ε′/ε in the Standard Model (SM) suffer from the renormalization scheme dependence present in the electroweak penguin
Jason Aebischer, C. Bobeth, A. Buras
semanticscholar +1 more source