PROTON-PROTON AND PROTON-ANTIPROTON CROSS-SECTIONS AT VERY HIGH ENERGIES

2003 ◽  
Author(s):  
ERASMO FERREIRA ◽  
FLAVIO I. M. PEREIRA
Keyword(s):  
Cross Sections ◽  
Proton Antiproton ◽  
Proton Proton ◽  
High Energies ◽  
Very High

scholarly journals Taming the Energy Rise of the Total Proton-Proton Cross-Section

Universe ◽  
2019 ◽  
Vol 5 (5) ◽  
pp. 106 ◽  
Author(s):  
Sergey Ostapchenko ◽  
Marcus Bleicher
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Strong Increase ◽  
Momentum Fraction ◽  
Proton Proton ◽  
High Energies ◽  
Model Predictions ◽  
Potential Impact ◽  
Very High

Steep rise of parton densities in the limit of small parton momentum fraction x poses a challenge for describing the observed energy-dependence of the total and inelastic proton-proton cross sections σ p p tot / inel : considering a realistic parton spatial distribution, one obtains a too-strong increase of σ p p tot / inel in the limit of very high energies. We discuss various mechanisms which allow one to tame such a rise, paying special attention to the role of parton-parton correlations. In addition, we investigate a potential impact on model predictions for σ p p tot, related to dynamical higher twist corrections to parton-production processes.

scholarly journals Evidence of Odderon-exchange from scaling properties of elastic scattering at TeV energies

2021 ◽  
Vol 81 (2) ◽  
Author(s):  
T. Csörgő ◽  
T. Novák ◽  
R. Pasechnik ◽  
A. Ster ◽  
I. Szanyi
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Scaling Function ◽  
Universal Curve ◽  
Proton Antiproton ◽  
Proton Proton ◽  
Scaling Properties ◽  
High Energies ◽  
Elastic Proton ◽  
Experimental Errors

AbstractWe study the scaling properties of the differential cross section of elastic proton–proton (pp) and proton–antiproton ($$p\bar{p}$$ p p ¯ ) collisions at high energies. We introduce a new scaling function, that scales – within the experimental errors – all the ISR data on elastic pp scattering from $$\sqrt{s} = 23.5$$ s = 23.5 –62.5 GeV to the same universal curve. We explore the scaling properties of the differential cross-sections of the elastic pp and $$p\bar{p}$$ p p ¯ collisions in a limited TeV energy range. Rescaling the TOTEM pp data from $$\sqrt{s} = 7$$ s = 7  TeV to 2.76 and 1.96 TeV, and comparing it to D0 $$p\bar{p}$$ p p ¯ data at 1.96 TeV, our results provide an evidence for a t-channel Odderon exchange at TeV energies, with a significance of at least 6.26$$\sigma $$ σ . We complete this work with a model-dependent evaluation of the domain of validity of the new scaling and its violations. We find that the H(x) scaling is valid, model dependently, within $$200~\hbox {GeV}\le \sqrt{s} \le 8$$ 200 GeV ≤ s ≤ 8  TeV, with a $$-t$$ - t range gradually narrowing with decreasing colliding energies.

scholarly journals Charmed and bottomed hadronic cross sections from a statistical model

2020 ◽  
Vol 56 (9) ◽  
Author(s):  
Gábor Balassa ◽  
György Wolf
Keyword(s):  
Statistical Model ◽  
Energy Range ◽  
Cross Sections ◽  
Heavy Quarks ◽  
Open Charm ◽  
Low Energy ◽  
Final State ◽  
Proton Antiproton ◽  
Proton Proton

Abstract In this work, we extended our statistical model with charmed and bottomed hadrons, and fit the quark creational probabilities for the heavy quarks, using low energy inclusive charmonium and bottomonium data. With the finalized fit for all the relevant types of quarks (up, down, strange, charm, bottom) at the energy range from a few GeV up to a few tens of GeV’s, the model is now considered complete. Some examples are also given for proton–proton, pion–proton, and proton–antiproton collisions with charmonium, bottomonium, and open charm hadrons in the final state.

Topological cross sections in hadron-nucleon and hadron-nucleus collisions at very high energies

1983 ◽  
Vol 399 (2) ◽  
pp. 515-528 ◽  
Author(s):  
H.J. Pirner ◽  
W.Q. Chao ◽  
M.K. Hegab
Keyword(s):  
Cross Sections ◽  
High Energies ◽  
Very High

Small-angle proton-proton elastic scattering at very high energies (460 GeV2 < s < 2900 GeV2)

1972 ◽  
Vol 39 (5) ◽  
pp. 663-667 ◽  
Author(s):  
G. Barbiellini ◽  
M. Bozzo ◽  
P. Darriulat ◽  
G.Diambrini Palazzi ◽  
G. De Zorzi ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Small Angle ◽  
Proton Proton ◽  
High Energies ◽  
Proton Elastic Scattering ◽  
Very High

scholarly journals STRUCTURE FUNCTIONS

2009 ◽  
Vol 24 (06) ◽  
pp. 1069-1086 ◽  
Author(s):  
CRISTINEL DIACONU
Keyword(s):  
Cross Sections ◽  
Structure Functions ◽  
Distribution Functions ◽  
Final States ◽  
Parton Distribution Functions ◽  
Proton Antiproton ◽  
Proton Proton ◽  
Proton Collisions ◽  
Bjorken X ◽  
Proton Proton Collisions

Recent progress in the understanding of the nucleon is presented. The unpolarized structure functions are obtained with unprecedented precision from the combined H1 and ZEUS data and are used to extract proton parton distribution functions via NLO QCD fits. The obtained parametrization displays an improved precision, in particular at low Bjorken x, and leads to precise predictions of cross-sections for LHC phenomena. Recent data from proton–antiproton collisions at Tevatron indicate further precise constraints at large Bjorken x. The flavor content of the proton is further studied using final states with charm and beauty in DIS ep and [Formula: see text] collisions. Data from polarized DIS or proton–proton collisions are used to test the spin structure of the proton and to constrain the polarized parton distributions.

scholarly journals Highest energy proton–nucleus cross-sections

2018 ◽  
Vol 33 (40) ◽  
pp. 1850242 ◽  
Author(s):  
L. Stodolsky
Keyword(s):  
Cosmic Rays ◽  
Cross Sections ◽  
High Energy ◽  
High Energy Proton ◽  
Proton Proton ◽  
Energy Proton ◽  
Black Disc ◽  
Simple Generalization ◽  
Very High Energy ◽  
Very High

The description of very high energy proton–proton cross-sections in terms of a “black disc” with an “edge” allows a simple generalization to highest energy proton–nucleus cross-sections. This results in a leading ln2W term and a ln W term whose coefficient depends linearly on the radius of the nucleus (W the c.m. energy). The necessary parameters are determined from the fits to p–p data. Since the coefficient of the ln W term is rather large, it is doubtful that the regime of ln2W dominance can be reached with available energies in accelerators or cosmic rays. However, the ln W term can be relevant for highest energy cosmic rays in the atmosphere, where a large increase for the cross-section on nitrogen is expected. Tests of the theory should be possible by studying the coefficient of ln W at p-nucleus colliders.

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