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SUMMARY:Adler function and   Bjorken sum rule: generalizations   of the  C
 rewther relation in SU(Nc)\, the  {&szlig\;}-expansion of PT series\,  con
 formal symmetry  limit and the way from  PMC    to the special extension o
 f BLM approach
DTSTART;VALUE=DATE-TIME:20161214T143000Z
DTEND;VALUE=DATE-TIME:20161214T160000Z
DTSTAMP;VALUE=DATE-TIME:20260424T120121Z
UID:indico-event-2860@indico.ific.uv.es
DESCRIPTION:The analytical QCD perturbation theory (PT) expressions for th
 e generalized Crewther relation\, non-singlet contributions to the Adler f
 unction and the Bjorken sum rule for polarized lepton-nucleon scattering a
 re considered in the case of SU(Nc) gauge theory. The relation to the {ß}
 -expansion approach for the coefficients of the PT series is clarified. Th
 e special way of finding the analytical form of the terms in the proposed 
 by Mikhailov {ß}-expansion pattern\, is described. It avoids the necessit
 y of introducing extra gluino degrees of freedom\, used in the concrete st
 udies for technical reasons only. The comparisons between different {ß}-e
 xpanded approximations for the Adler function and the Bjorken sum rule\, i
 ncluding the ones\, which follow from Brodsky- Wu-Mojaza PMC motivated exp
 ansion and Cvetic-Valenzuela skeleton motivated expansion\, are presented.
  The scheme-independent relations between PT contributions to the Adler fu
 nction and Bjorken sum rule\, which are obtained in the conformal symmetry
  limit\, are demonstrated. The considered by Kataev and Mikhailov (2015) p
 roposal to transform PMC into the special extension the BLM approach is cl
 arified.\n\nhttps://indico.ific.uv.es/event/2860/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/2860/
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