Nuclear Physics and Atomic Energy

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Nuclear Physics and Atomic Energy

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  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
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Nucl. Phys. At. Energy 2016, volume 17, issue 2, pages 143-149.
Section: Nuclear Physics.
Received: 26.05.2016; Accepted: 29.06.2016; Published online: 10.08.2016.
PDF Full text (ru)
https://doi.org/10.15407/jnpae2016.02.143

Isospin breaking in the pion-nucleon coupling constant and the nucleon-nucleon scattering length

V. A. Babenko*, N. M. Petrov

M. M. Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kyiv, Ukraine

*Corresponding author. E-mail address: pet2@ukr.net

Abstract: Charge independence breaking (CIB) in the pion-nucleon coupling constant and the nucleon-nucleon scattering length is considered on the basis of the Yukawa meson theory. CIB effect in these quantities is almost entirely explained by the mass difference between the charged and the neutral pions. Therewith charge splitting of the pion-nucleon coupling constant is almost the same as charge splitting of the pion mass. Calculated difference between the proton-proton and the neutron-proton scattering length in this case comprises ∼90% of the experimental value.

Keywords: charge independence, pion-nucleon coupling constant, nucleon-nucleon scattering, pion.

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