Possible odderon effects in inclusive hadron production

Abstract

A b s t r a c tWe consider the possible contribution of Odderon (Reggeon with α Odd (0) ∼ 1 and negative signature) exchange to the differences in the total cross sections of particle and antiparticle, to the ratios of real/imaginary parts of the elastic pp amplitude, and to the differences in the inclusive spectra of particle and antiparticle in the central region. The experimental differences in total cross sections of particle and antiparticle are compatible with the existence of the Odderon component but such a large Odderon contribution seems to be inconsistent with the values of Re/Im ratios. In the case of inclusive particle and antiparticle production the current energies and/or accuracy of the experimental data don't allow a clear conclusion.PACS. 25.75.Dw Particle and resonance production 1

Strong longitudinal color-field effects inppcollisions at energies available at the CERN Large Hadron Collider

“…These results complement previous data on pp and pp collisions taken at lower energies √ s = 0.02 -1.96 TeV [13][14][15][16][17][18][19][20][21][22][23]. Many of these measurements have been used to constrain phenomenological models of soft-hadronic interactions and to predict properties at higher energies [25][26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Measurement of prompt hadron production ratios in pp collisions at $\sqrt{s} = 0.9\mbox{ and }7~\mathrm{TeV}$

“…The value of α J ≈ 0.9 which would be expected if the string junction is associated with the Odderon [13] is excluded using this fit model. The same conclusion applies if the LHCb and ALICEp/p ratio values are fitted with an alternative parameterisation [11…”

“…This topic is known as baryon-number transport. Several models exist to describe this transport, but it is not clear which mechanisms are most important in driving the phenomenon [1][2][3][4][5][6][7][8][9][10][11][12][13]. Pomeron exchange is expected to play a significant role, but contributions may exist from other sources, for example the Odderon, the existence of which has not yet been established [13][14][15].…”

Proton and Λ hyperon production in nucleus-nucleus collisions

“…2a. However, in the processes with incident baryons there exists another possibility to produce a secondary baryon in the central region, called SJ diffusion. The quantitative description of the baryon number transfer due to SJ diffusion in rapidity space was obtained in [19] and following papers [4,5,20,21,22,24].…”

“…The significant differences in the yields of baryons and antibaryons in the central (midrapidity) region are present even at high energies. This effect can be explained [4,5,19,20,21,22,23,24] in QGSM by the special structure of baryons consisting of three valence quarks together with a special configuration of gluon field, called String Junction [25,26,27,28].…”