[Theory-seminars] Theory Seminar Wednesday - Duff Neill

[Colin Egerer]

Hello All,

This coming Wednesday, March 8th, at 1:00 PM (EST), Duff Neill will give our next hybrid theory seminar. If you will be on-site and are comfortable doing so, please join us in room F224/225 of CEBAF Center. Otherwise, Duff's seminar will also be provided virtually on our usual ZoomGov link:
https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09

Please see below for the title and abstract.

Theory Seminar
Wednesday, March 8th at 1:00 PM

Duff Neill (LANL)
will discuss "Fragmentation and Reciprocity"

Abstract:
I will discuss the relationship between the anomalous dimension of
Parton Distribution Functions to Fragmentation Functions to all orders
in the coupling, motivated by findings in conformal field theory. In
particular, I will give a set of evolution equations whose kernels are
determined by the DGLAP anomalous dimensions for PDFs, but when solved
determine the structure of the fragmentation cross-section, especially
in the limit of soft fragmentation. This gives an all-orders extension
of the older leading log angular ordering approximation previously
used in fragmentation studies, with systematic approximations to the
resummed perturbative series for QCD. When coupled with the
parton-hadron duality hypothesis, this gives a model for light hadron
fragmentation that agrees very well with high energy electron-positron
data.

Regards,
Caroline, Colin, & Patrick
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