SEMINAR - Hadron mass effects to event shape power corrections

Friday January 25th 2013, 2:30 pm - Seminar room

Speaker: Vicent Mateu (IFIC)

Abstract: 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 nonperturbative 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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