[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, March 12, 2018
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

John Collins
Penn State University

*Time to Retire a Myth in pQCD *

In many treatments of factorization in QCD, the logical starting point 
is an unproved
assertion that the cross sections in question are the convolution 
product of "bare parton
densities" and unsubtracted on-shell massless partonic cross sections. 
This assertion is
repeated many times in textbooks, lectures, as well as in papers. I will 
show why it is
physically and conceptually false.  I will argue that this myth is 
impeding progress in
pQCD, because an incorrect starting point messes up efforts to extend 
the methods.
Moreover, the myth miseducates students.

The link to remotely connect via Blue Jeans is available at
https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html 

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