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Next-to-next-to-leading-order QCD corrections to double J/ψ production at the B factories.
- Source :
- Journal of High Energy Physics; Feb2024, Vol. 2024 Issue 2, p1-16, 16p
- Publication Year :
- 2024
-
Abstract
- In this paper, we study the next-to-next-to-leading-order (NNLO) QCD corrections for the process e<superscript>+</superscript>e<superscript>−</superscript> → J/ψ + J/ψ at the B factories. By including the NNLO corrections, the cross section turns negative due to the poor convergence of perturbative expansion. Consequently, to obtain a reasonable estimation for the cross section, the square of the amplitude up to NNLO is used. In addition, the contributions from the bottom quark and the light-by-light part, which are usually neglected, are also included. The final cross section is obtained as 1.76 − 1.66 + 2.42 fb at a center-of-mass energy of s = 10.58 GeV. Our result for total cross section and differential cross section could be compared with precise experimental measurement in future at the B factories. [ABSTRACT FROM AUTHOR]
- Subjects :
- DIFFERENTIAL cross sections
QUANTUM chromodynamics
Subjects
Details
- Language :
- English
- ISSN :
- 11266708
- Volume :
- 2024
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of High Energy Physics
- Publication Type :
- Academic Journal
- Accession number :
- 175966807
- Full Text :
- https://doi.org/10.1007/JHEP02(2024)055