9 research outputs found
Two-scale hadronic structure and elastic pp scattering: predicted and measured
We update the comparison with experiment of the dynamical model of
high-energy hadron interactions based on the two scale structure of hadrons.
All predictions made over decade ago are confirmed with a high precision by the
TOTEM experiment at LHC.Comment: 6 pages, 6 figure
Scaling laws for the elastic scattering amplitude
The partial differential equation for the imaginary part of the elastic
scattering amplitude is derived. It is solved in the black disk limit. The
asymptotical scaling behavior of the amplitude coinciding with the geometrical
scaling is proved. Its extension to preasymptotical region and modifications of
scaling laws for the differential cross section are considered.Comment: 6 p. arXiv admin note: substantial text overlap with arXiv:1206.547
Evidences for two Scales in Hadrons
Some unusual features observed in hadronic collisions at high energies can be
understood assuming that gluons in hadrons are located within small spots
occupying only about 10% of the hadron's area. Such a conjecture about the
presence of two scales in hadrons helps to explain: why diffractive gluon
radiation so much suppressed; why the triple-Pomeron coupling shows no
t-dependence; why total hadronic cross sections rise with energy so slowly; why
diffraction cone shrinks so slowly, and why
; why the transition from hard to soft
regimes in the structure functions occurs at rather large ; why the
observed Cronin effect at collider energies is so weak; why hard reactions
sensitive to primordial parton motion (direct photon, Drell-Yan dileptons,
heavy flavors, back-to-back di-hadrons, seagull effect, etc.) demand such a
large transverse momenta of the projectile partons, which is not explained by
NLO calculations; why the onset of nuclear shadowing for gluons is so much
delayed compared to quarks, and why shadowing is so weak.Comment: 15 pages, 15 figure