[Cuga] Pizza Seminar Series - Wednesday, Feb 15, 2012 - A message from Hari Areti

[Jodi Patient]

Please RSVP to: patient at jlab.org by COB on February 13, 2012.

> Wednesday, February 15, 2012
> ****CC F113****
> 12:00-1:00pm
>
> *TMDs for the Simple-minded***
>
>
> *Sebastian Kuhn***
> Old Dominion University
>
>
> *Abstract**:*
> Recently, the topic of transverse-momentum dependent (TMD) parton 
> distribution functions (PDFs) has created a lot of interest and 
> excitement - with a large program planned for the 12 GeV era at 
> Jefferson Lab. However, for those of us who "grew up" with the 
> comfortable, simple world of just two nucleon structure functions (F1 
> and g1, augmented by higher twist corrections like R and A2), the 
> plethora of new quantities to be measured may be bewildering. Why are 
> there exactly EIGHT of these TMDs at leading twist? (Turns out there 
> are really 11 up to 2nd order in p_T). What can one possibly learn 
> from them? And how are they accessible experimentally? Where do all 
> these complicated sin(phi) (and cos(3phi) and...) terms come from?
>
>
> While the theory behind structure functions in general and TMDs in 
> particular is quite involved (and rapidly evolving), even a 
> simple-minded experimentalist can discern some order in this chaos 
> and, perhaps, develop a "naive intuition" for what this is all about. 
> The speaker professes to belong in this category and will try to pass 
> on some of his primitive understanding. While a little knowledge is 
> always dangerous, once you feel a little more comfortable with this 
> emerging field, it may be less daunting to get a deeper understanding. 
> Needless to say, this talk is NOT for experts (although I'm afraid 
> they'll come anyway and make me look foolish...)
>



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