Электронный каталог

Статья

Ablikim, M.
Measurements of Normalized Differential Cross Sections of Inclusive *h Production in e*+e*- Annihilation at Energy from 2.0000 to 3.6710 GeV / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review Letters [Electronic resource]. – 2024. – Vol. 133, No. 2. – P. 021901. – URL: https://doi.org/10.1103/PhysRevLett.133.021901. – Bibliogr.: 63.

Using data samples collected with the BESIII detector operating at the BEPCII storage ring, the cross section of the inclusive process 𝑒+⁢𝑒−→𝜂+𝑋, normalized by the total cross section of 𝑒+⁢𝑒−→hadrons, is measured at eight center-of-mass energy points from 2.0000 to 3.6710 GeV. These are the first measurements with momentum dependence in this energy region. Our measurement shows a significant discrepancy compared to the existing fragmentation functions. To address this discrepancy, a new QCD analysis is performed at the next-to-next-to-leading order with hadron mass corrections and higher twist effects, which can explain both the established high-energy data and our measurements reasonably well.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки