Электронный каталог

Статья

Borodin, N.S.
Spin and Orbital Structure of ff^- in Scalar and Pseudoscalar Decays / N.S.Borodin, D.V.Naumov // Физика элементарных частиц и атомного ядра. Письма. – 2026. – Т. 23, № 5. – P. 467. – URL: https://www1.jinr.ru/Pepan_letters/panl_2026_5/06_Borodin_ann.pdf.

We construct the coordinate-space wave function of a fermion–antifermion pair produced in two-body decays of a spin-zero parent. Starting from the S-matrix amplitude, we derive a momentum-space wave function and its Fourier transform. For a scalar (0&sup(+)) coupling, we obtain a pure L =1 partial wave whose spin factors select definite orbital projections m for specific spin orientations of f and f^-. For a pseudoscalar (0&sup(−)) coupling, the result is a pure L =0 wave with the usual singlet spin structure. We show explicitly why the back-to-back momenta of the final particles do not contradict nonzero orbital angular momentum (OAM): L is a property of the relative coordinate. We also discuss why OAM phases are generally invisible in standard high energy physics measurements that project onto momentum eigenstates, and point to spin-resolved angular correlations as the observable remnants



Спец.(статьи,препринты) = С 324.2 - Нелокальные и нелинейные теории поля. Теории с высшими производными. Теории с индефинитной метрикой. Квантовая теория протяженных объектов. Струны. Мембраны. Мешки$
ОИЯИ = ОИЯИ (JINR)2026