Abstract
Direct measurements of the structure functions Fνp1 and Fνn1 at a neutrino factory would allow for an accurate extraction of αs from the Q2-dependence of the Bjorken sum rule, complementing that based on the Gross–Llewellyn-Smith sum rule for F3. We estimate the power (1/Q2-) corrections to the Bjorken sum rule in the instanton vacuum model. For the reduced matrix element of the flavour-nonsinglet twist-4 operator ūgG̃μνγνγ5u − (u → d) we obtain a value of 0.18 GeV2, in good agreement with the QCD sum rule calculations of Braun and Kolesnichenko. Our result allows one to reduce the theoretical error in the determination of αs.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics G: Nuclear and Particle Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
