Open AccessBound state effects in transverse momentum parton distributions
Author(s) -
X. N. Maintas,
F. K. Diakonos,
Georgios Galanopoulos,
N. K. Kaplis,
C. I. Papoulias,
H. E. Tsagkarakis
Publication year - 2020
Publication title -
hnps advances in nuclear physics
Language(s) - English
Resource type - Journals
eISSN - 2654-0088
pISSN - 2654-007X
DOI - 10.12681/hnps.2642
Subject(s) - parton , physics , momentum (technical analysis) , wave function , ground state , bound state , gaussian , proton , transverse plane , nuclear physics , cross section (physics) , particle physics , quantum electrodynamics , quantum mechanics , hadron , structural engineering , finance , engineering , economics
We use a non-gaussian intrinsic transverse momentum distribution, associated with the wavefunction of the partonic ground state inside the proton, to calculate the production of π0 with intermediate transverse momentum values in p − p collisions at high energies. It is shown that a perfect description of the experimental data for different experiments is achieved using an almost constant value for the mean transverse momentum of the initial partons, compatible with Heisenberg’s uncertainty relation (⟨kT ⟩ ≈ 0.3 GeV ). Our analysis suggests the presence of a non-vanishing, non-perturbative contribution from partonic bound states to the pp → πo(γ) + X and pp → p + X cross section.