Results 21 to 30 of about 15,240 (207)
Constraints on disconnected contributions in ππ scattering
Journal of High Energy Physics, 2019 The accuracy of the lattice QCD computation of hadron-hadron scattering at low isospin depends critically on the ability to compute correlation functions with fermionic disconnected Wick contractions.
N. Ripunjay Acharya +3 more
doaj +1 more source
Two-meson form factors in unitarized chiral perturbation theory
Journal of High Energy Physics, 2021 We present a comprehensive analysis of form factors for two light pseudoscalar mesons induced by scalar, vector, and tensor quark operators. The theoretical framework is based on a combination of unitarized chiral perturbation theory and dispersion ...
Yu-Ji Shi +5 more
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Low energy pion–$$\Lambda _b$$ Λb interaction
European Physical Journal C: Particles and Fields, 2020 The low energy pion–$$\Lambda _b$$ Λb interaction is study in this work, considering effective chiral Lagrangians that include pions, baryons and the corresponding resonances.
M. G. L. Nogueira-Santos, C. C. Barros
doaj +1 more source
The order p8 mesonic chiral Lagrangian [PDF]
Journal of High Energy Physics, 2019 Abstract We derive the chiral Lagrangian at next-to-next-to-next-to-leading order (NNNLO) for a general number N f of light quark flavours as well as for N f = 2, 3. We enumerate the contact terms separately.
Johan Bijnens +2 more
openaire +3 more sources
Precision calculation of the axion-nucleon coupling in chiral perturbation theory
Journal of High Energy Physics, 2020 We derive the axion-nucleon interaction Lagrangian in heavy baryon chiral perturbation theory up to next-to-next-to-leading order. The effective axion-nucleon coupling is calculated to a few percent accuracy.
Thomas Vonk +2 more
doaj +1 more source
ϱ → 4π in chirally symmetric models [PDF]
, 1995 The decays rho0 → 2π+2π− and rho0 → 2π0π+π− are studied using various effective Lagrangians for π and rho (and in some case a1) mesons, all of which respect the approximate chiral symmetry of the strong interaction.
Birse, Michael C., Plant, Robert S.
core +2 more sources
2, 12, 117, 1959, 45171, 1170086, …: a Hilbert series for the QCD chiral Lagrangian
Journal of High Energy Physics, 2021 We apply Hilbert series techniques to the enumeration of operators in the mesonic QCD chiral Lagrangian. Existing Hilbert series technologies for non-linear realizations are extended to incorporate the external fields. The action of charge conjugation is
Lukáš Gráf +4 more
doaj +1 more source
On the Origin of the Enhancementof CP-violating Charge Asymmetries in $K \rightarrow 3\pi$ Decays Predicted from Chiral Theory [PDF]
, 1993 We present an analysis of the enhancement of CP-violating charge asymmetries in $K \rightarrow 3\pi$ decays. Calculations of decay amplitudes are performed on the basis of bosonized strong and weak Lagrangians derived from QCD-motivated quark Lagrangians.
A. Schaale +29 more
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Two-current correlations in the pion on the lattice
Journal of High Energy Physics, 2018 We perform a systematic study of the correlation functions of two quark currents in a pion using lattice QCD. We obtain good signals for all but one of the relevant Wick contractions of quark fields.
Gunnar S. Bali +8 more
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Massive Spinning Relativistic Particle: Revisited under BRST and Supervariable Approaches
Advances in High Energy Physics, 2020 We discuss the continuous and infinitesimal gauge, supergauge, reparameterization, nilpotent Becchi-Rouet-Stora-Tyutin (BRST), and anti-BRST symmetries and derive corresponding nilpotent charges for the one 0+1-dimensional (1D) massive model of a ...
A. Tripathi +3 more
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