TY - JOUR

T1 - N N ¯ production in e+e- annihilation near the threshold revisited

AU - Milstein, A. I.

AU - Salnikov, S. G.

N1 - Publisher Copyright: © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2022/10/1

Y1 - 2022/10/1

N2 - Production of pp¯ and nn¯ pairs in e+e- annihilation near the threshold of the process is discussed with account for the new experimental data that appeared recently. Since a significant part of these new data was obtained at energies noticeably exceeding the threshold, we also take into account the form factor describing the amplitude of NN¯ pair production at small distances. The effective optical potential, which describes a sharp dependence of the NN¯ production cross sections near the threshold, consists of the central potential for S and D waves and the tensor potential. These potentials differ for states with isospin I=0 and I=1 of the NN¯ pair. The optical potential describes well NN¯ scattering phases, the cross sections of pp¯ and nn¯ production in e+e- annihilation near the threshold, and the electromagnetic form factors GE and GM for protons and neutrons, as well as the cross sections of the processes e+e-→6π and e+e-→K+K-π+π-.

AB - Production of pp¯ and nn¯ pairs in e+e- annihilation near the threshold of the process is discussed with account for the new experimental data that appeared recently. Since a significant part of these new data was obtained at energies noticeably exceeding the threshold, we also take into account the form factor describing the amplitude of NN¯ pair production at small distances. The effective optical potential, which describes a sharp dependence of the NN¯ production cross sections near the threshold, consists of the central potential for S and D waves and the tensor potential. These potentials differ for states with isospin I=0 and I=1 of the NN¯ pair. The optical potential describes well NN¯ scattering phases, the cross sections of pp¯ and nn¯ production in e+e- annihilation near the threshold, and the electromagnetic form factors GE and GM for protons and neutrons, as well as the cross sections of the processes e+e-→6π and e+e-→K+K-π+π-.

UR - http://www.scopus.com/inward/record.url?scp=85140212920&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.106.074012

DO - 10.1103/PhysRevD.106.074012

M3 - Article

AN - SCOPUS:85140212920

VL - 106

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 7

M1 - 074012

ER -