Speaker
Description
The internal motion of partons has been studied through its impact on
very low transverse momentum spectra of Drell Yan pairs
created in hadron-hadron collisions at NLO using the Parton Branching
(PB) Method which describes the evolution of transverse momentum
dependent (TMD) parton distributions. The main focus is on studying the
dependence of the intrinsic transverse momentum of partons in the initial
state (intrinsic kT) on collision centre of mass energy, $\sqrt s$.
While the standard Monte Carlo event generators require parton intrinsic
transverse momentum distributions strongly dependent on $\sqrt s$, in the
PB Method there is no such dependence.
In addition to this, it will be shown that by requiring minimal transverse
momentum of the radiated parton at a branching of the order of 1-2 GeV, the $\sqrt s$ dependence of the intrinsic-kt in the PB Method will be introduced and will be steeper by increasing the minimal value.
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