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
We consider the first LHC data for pp collisions in the framework of Regge theory. The integral cross sections and inclusive densities of secondaries are determined by the Pomeron exchange, and we present the corresponding predictions for them. The first measurements of inclusive densities in midrapidity region are in agreement with these predictions. The possible contribution of Odderon (Reggeon with α Od (0) ∼ 1 and negative signature) exchange to the differences in the inclusive spectra of particle and antiparticle in the central region could be significant at LHC energies. The first data of ALICE Collaboration are consistent with a very small Odderon contribution. Probably, further LHC data will definitely settle the question of the Odderon existence.
The planned Compressed Baryonic Matter (CBM) experiment at the upcoming FAIR center at GSI, Darmstadt is aiming at the investigation of baryonic matter at high density produced in relativistic heavy-ion collisions. The research program comprises the exploration of the QCD phase diagram at high net baryon densities and moderate temperatures, the search for the de-confinement phase transition, and in-medium modifications of hadrons. The proposed key observables include the measurement of charmonia and low mass vector mesons which can be measured via their decay into the dilepton channel. In this paper, we discuss the physics motivation, detector concepts, and feasibility studies of the di-muon measurements.
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