Электронный каталог

Статья

Ablikim, M.
Measurement of *L Transverse Polarization in e*+e*- Collisions at *%s=3.68 - 3.71 GeV / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, S.Pogodin, A.Sarantsev, A.Zhemchugov, [a.o.] // Journal of High Energy Physics [Electronic resource]. – 2023. – Vol.2023, No.10. – P.081. – URL: https://doi.org/10.1007/JHEP10(2023)081. – Bibliogr.:59.

With data samples collected with the BESIII detector at seven energy points at = 3.68 − 3.71 GeV, corresponding to an integrated luminosity of 333 pb−1, we present a study of the Λ transverse polarization in the e+e− → reaction. The significance of polarization by combining the seven energy points is found to be 2.6σ including the systematic uncertainty, which implies a non-zero phase between the transition amplitudes of the helicity states. The modulus ratio and the relative phase of EM-psionic form factors combined with all energy points are measured to be RΨ = ± 0.03 and ∆ΦΨ = ± 1.6°, where the first uncertainties are statistical and the second systematic.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки