[Theory-seminars] Remote theory seminar next week

[Astrid Hiller Blin]

Dear all,

Here is a reminder of next week's theory seminar:

*Theory seminar*
Monday August 31, 1:00 PM

*Yacine Mehtar-Tani* (BNL) will talk about "Towards a unification of gluon
distributions at small and moderate x".

*Abstract:*
Understanding the relation between QCD evolution in the Bjorken limit and
the Regge limit is crucial to achieve a complete and smooth picture of
proton and nuclear structure for arbitrary Bjorken x values. The hope, in
the small x regime where gluon density is expected to reach saturation and
the naif partonic breaks down, was that by computing higher order
corrections to small x evolution (BK equation) one would capture more and
more of the physics at moderate x. However, this research program has
encountered some challenges.  At NLO large collinear logarithms are present
and needs to be resummed spoiling the renormalization group structure
established at LO.

In order to overcome these formal difficulties we propose to revisit the
shock wave approach for high energy scattering  by proposing a new gauge
invariant operator definition for hadronic operators at small x that
accounts systematically for the collinear limit of the unintegrated gluon
distribution. I will discuss in particular inclusive DIS as a first
application.

Bluejeans connection: https://bluejeans.com/801786278
<https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_801786278&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=AIMSQQ81YDyrZuJNGks2qw&m=aT_3J5jjiFmHtFXffqbfPqEY_A73NEWw2ebyFyL_eCA&s=YNm3qgT5e8sJgKfZ9vFA_w--imuXwmeAjg0C4AslLwg&e=>

Best wishes,
Astrid, Christos, Filippo, Miguel
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