1202.2438 (F. Nemes et al.)

First Results of a Detailed Analysis of p+p Elastic Scattering Data from
ISR to LHC Energies in the Quark-Diquark Model    [PDF]

F. Nemes, T. Csörgő

First results of a detailed analysis of p+p elastic scattering data are
presented from ISR to LHC energies utilizing the quark-diquark model of protons
in a form proposed by Bialas and Bzdak. The differential cross-section of
elastic proton-proton collisions is analyzed in detailed and systematic manner
at small momentum transfers, starting from the energy range of CERN ISR at
$\sqrt{s}= 23.5$ GeV, including also recent TOTEM data at the present LHC
energies at $\sqrt{s} = 7$ TeV. These studies confirm the picture that the size
of protons increases systematically with increasing energies, while the size of
the constituent quarks and diquarks remains approximately independent of (or
only increases only slightly with) the colliding energy. The detailed analysis
indicates correlations between model parameters and also indicates an
increasing role of shadowing at LHC energies.

View original: http://arxiv.org/abs/1202.2438