The total pp cross section is a fundamental property of the strong interaction which can not be calculated in perturbative QCD but only described based on phenomenological models. The ATLAS collaboration has explored the total proton-proton cross section, using measurements of the total inelastic proton-proton cross sections and of the diffractive part of the inelastic cross section in...
The TOTEM collaboration at the LHC has completed its analysis of the elastic,
inelastic and total proton-proton cross-sections (via the optical
theorem) at sqrt(s) = 2.74 TeV. The new measurement lies close in energy
to the Tevatron's 1.8 TeV with its two slightly conflicting total
cross-section results.
The presentation will put the new measurement in the context of completed,
ongoing and...
In this work let me review some recent results on the model-independent shape analysis of the differential cross section of elastic proton-proton or proton-antiproton scattering. After a general introduction to the model independent shape analysis of correlation functions in general and functions that are squared moduli of Fourier-transformed amplitude, including Edgeworth, Laguerre, Gauss...
Our investigation of high energy pp and p ̅p elastic scattering over the last two decades has
led us to consider that the proton has three regions: i) an outer region consisting of a
quark-antiquark (qq ̅) condensate ground state (also described as quark-antiquark outer
cloud), ii) an inner shell of baryonic charge of size ~0.44 fm, and iii) a core of size ~0.2 fm, where the three valence...
The differential cross section in the forward region of
pp elastic scattering at 8 TeV has presented deviation
from pure exponential form. We analyse these data
with attention to the structure of the real part with a
t dependence for the real amplitude motivated by the
study of dispersion relations for slopes. The functional
form obtained is compatible with the existence of a zero
in the...
Anticipating forthcoming publication by the TOTEM collaboration of low-t elastic scattering data at
\sqrt{s}=13 and 2.76 TeV, hereby we emphasize the correlation between two prominent structures
seen upon the otherwise exponential diffraction cone, namely a "break" staying fixed around t=-0.1 GeV^2
and a dip moving with energy logarithmically inwards; while at the ISR the two structures are...
Elastic-scattering data were analyzed, and it was concluded on the basis of this analysis that precisionmeasurements of differential cross sections for elastic proton–proton scattering at the accelerator of the Logunov Institute for High Energy Physics (LIHEP, Protvino, Russia) over a broad momentum-transfer range are of importance and topical interest. The layout of the respective...
Under the influence of standardly used description of Coulomb-hadronic interference proposed by West and Yennie the protons have been interpreted as transparent objects; elastic events have been interpreted as more central than inelastic ones. It is known that using more general eikonal model measured elastic data may be interpreted also very differently; elastic processes being more...
The soft diffraction phenomena in the elastic proton-proton scattering are reviewed from the viewpoint of experiments at the LHC (TOTEM and ATLAS collaboration). Based on the analysis of the new LHC experimental data on the elastic proton-proton scattering, which announce the non-exponential behavior of the differential cross sections of the diffraction cone, different model assumptions are...
We study the Coulomb-nuclear interference (CNI), a kinematical region of very low 4-momentum transfer squared, $-t$, where the single-spin asymmetry $A_N(t)$ is measured.
The measurement of the analyzing power $A_N(t)$ offers in particular a way of how polarimeters can determine the beam polarization e.g. in the RHIC spin program.
The current theoretical approaches assume that the proton...
