Abstract
The spectra of baryons at LHC can explain the features of CR proton spectra. It seems important to study all baryon data that are available from collider experiments in a wide range of energies. Transverse momentum spectra of baryons from RHIC (√(s) = 62 and 200 GeV) and LHC experiments (√(s) = 0.9 and 7 TeV) have been considered. It is seen that the slope of low pT distributions is changing with energy. The QGSM fit of distributions gives the average transverse momenta which behave approximately as s0.06 that is similar to the previously observed behavior of Λ baryon spectra. This slow growing of <pT> in hadron interactions of VHE in CR detectors cannot cause the “knee” in experimental proton spectra. In addition, the available data on Λc production from LHCb at √s = 7 TeV were also studied. The preliminary dependence of hadron average transverse momenta on their masses at the LHC energy is presented. The possible source of cosmic ray antiparticle-to-particle ratios that are growing with energy was also analyzed. The growing ratios are the result of local leading asymmetry for spectra of baryons and antibaryons that are produced in the kinematical region of proton target fragmentation. This asymmetry of baryon spectra, as they are converted into the energy distributions in the laboratory system, seems to result in an increasing ratio of secondary antiparticle-to-particle spectra up to a few hundreds of GeV. This conclusion makes important the particle production at the sources of very high energy cosmic rays where the VHE interactions with positive matter target may take place.
Highlights
The spectra of baryons at the LHC can explain the features of cosmic ray particle spectra at very high energies
0 production has been studied [3] in an updated version of this model. √ The complete study of baryon spectra at LHC energies ( (s) = 0.9–7 TeV) [4] did not show important changes that may be responsible for the “knee” in CR proton spectra, see Fig. 1
Transverse mo√mentum spectra of protons and antiprotons from RH√IC ( (s) = 62 and 200 GeV) and LHC experiments ( (s) = 0.9 and 7 TeV) have been described in the QGSM approach. This model seems to work for the up-todate collider energies, because spectra at low pT are still giving the main part of integral cross section
Summary
The spectra of baryons at the LHC can explain the features of cosmic ray particle spectra at very high energies. The transverse momentum distributions are the primary data that can be obtained in the study of hadron spectra at modern colliders. Interpretation of these distributions in up-to-date phenomenological models can shed a light on the physics of hadroproduction processes at high energies. The model has d√escribed the data of previous colliders up to energies (s) = 53 GeV at the area of low pT that gives main contribution to the average value of transverse momenta [2]. The average transverse momenta dependence on the mass of baryon (meson) at the LHC energy is considered up to the masses of charmed and beauty hadrons
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