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The longest-range part of the nuclear force due to the one-pion exchange governs the energy dependence of the scattering amplitude in the near-threshold region and imposes correlations between the coefficients in the effective range…

核理论 · 物理学 2015-07-15 V. Baru , E. Epelbaum , A. A. Filin , J. Gegelia

We have performed fits of the pseudoscalar masses and decay constants, from a variety of RBC-UKQCD domain wall fermion ensembles, to $SU(2)$ partially quenched chiral perturbation theory at next-to leading order (NLO) and next-to-next-to…

Results of an exploratory study of the antinucleon-nucleon interaction within chiral effective field theory are reported. The antinucleon-nucleon potential is derived up to next-to-next-to-leading order, based on a modified Weinberg power…

高能物理 - 唯象学 · 物理学 2015-06-17 Xian-Wei Kang , Johann Haidenbauer , Ulf-G. Meißner

We calculate the lambda-nucleon scattering phase shifts and mixing angles by applying time-ordered perturbation theory to the manifestly Lorentz-invariant formulation of SU(3) baryon chiral perturbation theory. Scattering amplitudes are…

核理论 · 物理学 2020-03-18 X. -L. Ren , E. Epelbaum , J. Gegelia

The scattering of a weakly bound (halo) projectile nucleus by a heavy target nucleus is investigated. A new approach, called the Uncorrelated Scattering Approximation, is proposed. The main approximation involved is to neglect the…

核理论 · 物理学 2009-11-07 A. M. Moro , J. A. Caballero , J. Gómez-Camacho

We apply the low-energy theorems to analyze the recent lattice QCD results for the two-nucleon system at a pion mass of $M_\pi\simeq 450$ MeV obtained by the NPLQCD collaboration. We find that the binding energies of the deuteron and…

核理论 · 物理学 2016-07-20 V. Baru , E. Epelbaum , A. A. Filin

The treatment of nuclear effects in neutrino-nucleus interactions is one of the main sources of systematic uncertainty for the analysis and interpretation of data of neutrino oscillation experiments. Neutrinos interact with nuclei via…

高能物理 - 唯象学 · 物理学 2020-01-29 Carlotta Giusti , Martin V. Ivanov

In this work we consider the renormalization of the chiral two-pion exchange potential with explicit delta-excitations for nucleon-nucleon scattering at next-to-leading (NLO) and next-to-next-to-leading order (N2LO). Due to the singular…

核理论 · 物理学 2015-03-17 M. Pavon Valderrama , E. Ruiz Arriola

The standard way to demonstrate the relevance of chiral symmetry for the NN interaction is to consider higher partial waves of NN scattering which are controlled entirely by chiral pion-exchanges (since contacts vanish). However, in…

核理论 · 物理学 2021-01-19 H. Alanazi , R. Machleidt

We present a new energy-dependent partial-wave analysis of all antiproton-proton elastic and charge-exchange scattering data below 925 MeV/c antiproton laboratory momentum. The long-range parts of the chiral one- and two-pion exchange…

高能物理 - 唯象学 · 物理学 2012-10-29 Daren Zhou , Rob G. E. Timmermans

Current long baseline experiments aim at measuring neutrino oscillation parameters with a high precision. A critical quantity is the neutrino energy which can not be measured directly but has to be reconstructed from the observed hadrons. A…

核理论 · 物理学 2009-04-03 T. Leitner , O. Buss , U. Mosel , L. Alvarez-Ruso

Low energy theorems are derived for the coefficients of the effective range expansion in s-wave nucleon-nucleon scattering valid to leading order in an expansion in which both $m_\pi$ and $1/a$ (where $a$ is the scattering length) are…

核理论 · 物理学 2008-11-26 Thomas D. Cohen , James M. Hansen

The quasielastic scattering of muon neutrinos on oxygen 16 is studied for neutrino energies between 200 MeV and 1 GeV using a relativistic shell model. Final state interactions are included within the distorted wave impulse approximation,…

核理论 · 物理学 2016-08-16 C. Maieron , M. C. Martínez , J. A. Caballero , J. M. Udías

We use nucleon-nucleon phase shifts obtained from experimental data, together with the chiral expansion for the long-distance part of the NN interaction, to obtain information about the short-distance piece of the NN potential that is at…

核理论 · 物理学 2008-11-26 Deepshikha Shukla , Daniel R. Phillips , Eric Mortenson

The scale-dependence of the nucleon-nucleon interaction, which in recent years has been extensively analysed within the context of chiral effective field theory, is, in fact, inherent in any potential models constrained by a fit to…

核理论 · 物理学 2019-03-28 Omar Benhar

We review the relevance of neutrino-nucleus interactions at energy transfers below 100 MeV for accelerator-based experiments, experiments at lower energies and for astrophysical neutrinos. The impact of low-energy scattering processes in…

核理论 · 物理学 2019-08-07 Natalie Jachowicz , Nils Van Dessel , Alexis Nikolakopoulos

Neutron-deuteron scattering in the context of ``pion-less'' Effective Field Theory at very low energies is investigated to next-to-next-to-leading order. Convergence is improved by fitting the two-nucleon contact interactions to the tail of…

核理论 · 物理学 2009-11-10 Harald W. Griesshammer

The nucleon-nucleon interaction in the region of the nucleon kinetic energy up to 1000 MeV is analysed together with the reaction $\gamma d \to pn$ in the photon energy range $E_{\gamma}=0-400$ MeV. Nine nucleon-nucleon $s$-channel partial…

核理论 · 物理学 2015-06-26 A. V. Anisovich , V. A. Sadovnikova

Nucleon-nucleon scattering in the $^1S_0$ partial wave is considered in chiral effective field theory within the renormalizable formulation of Ref. [1] beyond the leading-order approximation. By applying subtractive renormalization, the…

核理论 · 物理学 2015-01-07 E. Epelbaum , A. M. Gasparyan , J. Gegelia , H. Krebs

Within the framework of the Glauber diffraction theory, the differential cross sections of the elastic p6He, p8Li, and p9Li scattering were calculated at intermediate energies from 70 to 1000 MeV/nucleon. The use of realistic three-body…

核理论 · 物理学 2015-06-15 E. T. Ibraeva , A. V. Dzhazairov-Kahramanov , O. Imambekov