ELFT HÍRADÓ

[Somogyi Gábor <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


     Sam Van Thurenhout
     (HUN-REN Wigner RCP)


"Aliens in QCD: Towards precise parton evolution”


címmel tartandó szemináriumára.


Kivonat:



Understanding the scale dependence of parton distribution functions is vital 
for precision physics at hadron colliders. The well-known DGLAP evolution 
equation relates this scale dependence to the QCD splitting functions, which 
can be calculated perturbatively in terms of the anomalous dimensions of 
leading-twist gauge-invariant operators. The computation of the latter in 
general requires one to take into account contributions of gauge-variant (or 
alien) operators. In this talk, we discuss the systematic study of these 
alien operators at arbitrary spin N. In particular, using generalized BRST 
symmetry relations, we derive the one-loop couplings and Feynman rules of the 
aliens necessary to perform the operator renormalization up to four loops in 
QCD. This provides an important step towards the determination of the 
four-loop splitting functions which will be of significant phenomenological 
importance at future colliders like the High-Luminosity LHC.



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2024 október 18. péntek d.u. 14 óra

Szívesen látunk minden érdeklődőt.


                Somogyi Gábor