Speaker
Daniel Adamiak
(Ohio State University)
Description
In order to solve the proton spin problem, the small-$x$ asymptotics of the helicity parton distribution functions (hPDFs) need to be understood. New theory has been developed for the small-$x$ evolution of these hPDFs, able to extrapolate the small-$x$ behaviour of the quark and gluon hPDFs. At large $N_c \& N_f$, these evolution equations close and are amenable to numerical computation. In this talk we will present the phenomenological analysis of this theory by describing the world data on the $g_1$ and $g_1^h$ structure functions within the JAM global analysis framework . Beyond this, we investigate the qualitative behaviour of the quark and gluon hPDFs and the challenges involved with measuring them.
| Submitted on behalf of a Collaboration? | No |
|---|---|
| Participate in poster competition? | No |
Authors
Andrei Tarasov
(S)
Daniel Adamiak
(Ohio State University)
Co-authors
Daniel Pitonyak
(Lebanon Valley College)
Matthew Sievert
(New Mexico State University)
Mr
Nick Boldonado
(NMSU)
Nobuo Sato
Dr
Wally Melnitchouk
(Jlab)
Yossathorn Tawabutr
(University of Jyväskylä)
Prof.
Yuri Kovchegov
