Seminar “Hadron Physics”
Date and Time: Friday, 6 December 2024, at 11:00 AM
Venue: online seminar on Zoom, Blokhintsev hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Link to join the seminar on Zoom
Seminar topic: “Bjorken sum rule with analytic coupling”
Speaker: Anatoly Kotikov
Abstract:
A good agreement is found between the experimental data obtained for the
polarised Bjorken sum rule and the predictions of analytical QCD, which
also includes contributions from heavy quarks. At the same time, a
strong difference is found between these data and the results obtained
within the perturbative QCD. A new representation of the perturbative
part of the polarised Bjorken sum rule is developed to satisfy the
photoproduction limit and take into account the Gerasimov-Drell-Hearn
and Burckhardt-Cottingham sum rules.