Weak axial nuclear heavy meson exchange currents and interactions of solar neutrinos with deuterons

2002/12/31 by B. Mosconi, P. Ricci, Pier Carlo Ricci +2
Physics and Astronomy · #Amplitude #Deuterium #Feynman diagram #Meson #Neutrino #Neutrino Physics Research #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #nucl-th

paper · pdf · doi:10.1016/j.nuclphysa.2006.03.011

published as Nucl. Phys. A772 (2006)81-112 · 34 pages, 3 figures, 11 tables

openalex publication_date 2006/04/19 · arxiv created 2007/02/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Starting from the axial heavy meson exchange currents, constructed earlier in conjunction with the Bethe--Salpeter equation, we first present the axial ρ--, ω-- and a₁ meson exchange Feynman amplitudes that satisfy the partial conservation of the axial current. Employing these amplitudes, we derive the corresponding weak axial heavy meson exchange currents in the leading order in the 1/M expansion (M is the nucleon mass), suitable for the nuclear physics calculations beyond the threshold energies and with wave functions obtained by solving the Schrödinger equation with one--boson exchange potentials. The constructed currents obey the nuclear form of the partial conservation of the axial current. We apply the space component of these currents in calculations of the cross sections for the disintegration of deuterons by low energy (anti)neutrinos. The deuteron and the final state nucleon--nucleon wave functions are derived (i) from a variant of the OBEPQB potential, and (ii) from the Nijmegen 93 and Nijmegen I nucleon-nucleon interaction. The extracted values of the constant L_{1, A}, entering the axial exchange currents of the pionless effective field theory, are in a reasonable agreement with its value predicted by the dimensional analysis.

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