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arXiv · 1602.08003

Average transverse momenta of baryon production at p-p collider experiments and their crucial implications for the high energy hadroproduction physics

Olga I. Piskounova
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Abstract

The phenomenological approach in the framework of Quark-Gluon String Model (QGSM) has been applied to the description of transverse momentum spectra for the baryon production at colliders. The analysis of data on hyperon transverse momentum distributions,dN/dp_t, demonstrates a difference in the dynamics of multiparticle production in proton-proton vs. antiproton-proton collisions in the region of low p_t . The most important contribution in antip-p reaction goes from fragmentation of antidiquark-diquark side of pomeron diagram. The complete study of the energy dependence of average transverse momenta for the energies from sqrt(s)= 0.2 to 7. TeV shows the slight growing of with energy. No dramatic changes were seen on the range from Tevatron to LHC, which may be responsible for "knee" in the cosmic ray proton spectra. The average transverse momentum analysis through the different mass of hadrons reveals some regularity in the mass gaps between the hadron generations. This observation suggests that more hadrons with the following masses 13.7, 37.3, 101.5, 276, 750 ... GeV are expected by geometrical progression with the mass factor of order $δ{lnM}$=1 . These states may possess new quantum numbers beyond the Standard Model. The possibility of QGSM to construct the spectra of baryons in the whole range of x_F gives obvious advantages in the description of production asymmetries: the baryon-over-antibaryon access in the central region of proton-proton collisions, the baryon-to-meson abnormal ratios in nucleus-nucleus reactions, the growing ratios of secondary particles in cosmic ray spectra as well as the recently observed negative asymmetry for charmed baryon/antibaryon spectra at the far rapidity point Y=2 in LHCb experiment. This study, based on the routine analysis of collider data, has many crucial implications for the entire field of hadroproduction physics.

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Olga I. Piskounova. 2016-11-18. Average transverse momenta of baryon production at p-p collider experiments and their crucial implications for the high energy hadroproduction physics. https://doi.org/10.22323/1.282.0711

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