[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Mon., Dec. 3, 2012
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L104

Vicent Mateu Barreda
MIT

*Hadron Mass Effects to Event Shape Power Corrections*

In my talk I will address the issue of mass effects on power correction 
to event shape
distributions. In particular, I will define an operator that describes 
the effect of hadron
masses on the leading 1/Q power correction. Here, Q is the scale of the 
hard collision.
Despite the fact that different event shapes have different hadron mass 
dependence,
we provide a simple method to identify universality classes of event 
shapes whose
power corrections depend on a common non-perturbative parameter. We compute
the anomalous dimension of the transverse velocity operator which causes 
the power
correction to exhibit non-trivial dependence on Q.
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