TY - JOUR
T1 - Renormalon structure in Bjorken sum rule
AU - Ayala, César
AU - Castro-Arriaza, Camilo
AU - Cvetič, Gorazd
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2024/4
Y1 - 2024/4
N2 - Leading-twist Bjorken polarised sum rule (BSR) Γ‾1p−n(Q2) is evaluated using its known renormalon structure. In addition, we add OPE terms with the dimension D=2,4, and fit this to experimental data for inelastic BSR in specific intervals of momenta, Q2≥Qmin2, where Qmin2≈(1.7±0.3)GeV2. Reasonable values of the pQCD coupling can be extracted only for specific choices of Qmin2, but have in general, for other choices of Qmin2, very large uncertainties and thus cannot be extracted in practice. On the other hand, if we fix the pQCD coupling to the known world average values, the D=2 and D=4 OPE terms can be determined within reasonable uncertainties dominated by the experimental uncertainties of the data.
AB - Leading-twist Bjorken polarised sum rule (BSR) Γ‾1p−n(Q2) is evaluated using its known renormalon structure. In addition, we add OPE terms with the dimension D=2,4, and fit this to experimental data for inelastic BSR in specific intervals of momenta, Q2≥Qmin2, where Qmin2≈(1.7±0.3)GeV2. Reasonable values of the pQCD coupling can be extracted only for specific choices of Qmin2, but have in general, for other choices of Qmin2, very large uncertainties and thus cannot be extracted in practice. On the other hand, if we fix the pQCD coupling to the known world average values, the D=2 and D=4 OPE terms can be determined within reasonable uncertainties dominated by the experimental uncertainties of the data.
KW - QCD phenomenology
KW - Renormalons
KW - Resummations
UR - https://www.scopus.com/pages/publications/85177184218
U2 - 10.1016/j.nuclphysbps.2023.11.007
DO - 10.1016/j.nuclphysbps.2023.11.007
M3 - Article
AN - SCOPUS:85177184218
SN - 2405-6014
VL - 343
SP - 94
EP - 98
JO - Nuclear and Particle Physics Proceedings
JF - Nuclear and Particle Physics Proceedings
ER -