[Theory-seminars] Seminar on Monday 01/14

[Alexei Prokudin]

Dear all,

we have a Theory Center Seminar on Monday 14th of January
CEBAF Center, Room L104
1:00 p.m.

Speaker:  Daniel Pitonyak (Temple University)

Title:  Photon fusion reactions in a dispersive effective field
theory (DFT) from the chiral Lagrangian with vector meson fields".

Abstract: Experimental data has recently become available on the transverse
target single-spin asymmetry (SSA) for inclusive DIS.  I will
present analytical and numerical results for this observable, which
also have implications for the current extractions of the Qiu-Sterman
function T_F(x,x) that arises in transverse SSAs from pp collisions.
Possible resolutions to the so-called "sign-mismatch"
crisis including a new calculation of the fragmentation
contribution to the transverse SSA in pp collisions
will also be explored.  Moreover, extensive work has
been done on the leading-twist (twist-2) double-longitudinal spin 
asymmetry A_LL.  Here I will focus on the analysis of the 
longitudinal-transverse spin asymmetry A_LT for photon, hadron, and jet 
production from pp collisions.  Furthermore, I will discuss how this 
observable could give insight into both the A_LL and transverse SSA domains.


A complete list of upcoming theory seminars and talks from previous
seminars is available from:
http://www.jlab.org/div_dept/theory/seminars/

Alexei, Alvaro and Carlos
JLab Theory Seminar Organizers