Possible study of two-particle transverse momentum correlations in proton-proton and deuteron-deuteron interactions at NICA energies

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Two particle transverse momentum correlations have been investigated for proton-proton and deuteron-deuteron interactions at center-of-mass energy of NN collisions of 10 GeV. The correlations between Λ-hyperons and К-, π- mesons and protons are calculated in Geant4 FTF and Pythia 6.4 models. It is shown that PT-correlations between Λ-hyperons and strange particles are stronger in the FTF model than in Pythia one. The two particle PT-correlations can be studied at NICA SPD experiment. A study of the two particle correlations can help to clarify the mechanism of quark-gluon string fragmentation.

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作者简介

A. Galoyan

Joint Institute for Nuclear Research

编辑信件的主要联系方式.
Email: galoyan@lxmx00.jinr.ru
俄罗斯联邦, Dubna, 141980

A. Ribon

European Organization for Nuclear Research

Email: galoyan@lxmx00.jinr.ru
瑞士, Geneva, CH-1211

V. Uzhinsky

Joint Institute for Nuclear Research

Email: galoyan@lxmx00.jinr.ru
俄罗斯联邦, Dubna, 141980

参考

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2. Fig. 1. Projections of the transverse momenta of π and K mesons onto the direction of the transverse momentum of the Λ hyperon and onto the direction orthogonal to it.

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3. Fig. 2. Dependences of the average values of the longitudinal components of the momenta of associated particles (anti Λ-, proton, K+, K–, π+, π–) in the new coordinate system on the transverse momentum of the Λ-hyperon for proton-proton interactions at an energy in the center-of-mass system of NN collisions of √S = 10 GeV. Calculations are presented using the FTF model (●) and the Pythia model (○) taking into account statistical errors.

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4. Fig. 3. Dependences of the average values of the longitudinal components of the momenta of associated particles (anti Λ-, K0, K+, K–, π+, π–) in the new coordinate system on the transverse momentum of the Λ-hyperon in deuteron-deuteron (○) and proton-proton interactions (●) at an energy in the center-of-mass system of NN collisions of √S = 10 GeV. Calculations using the FTF model taking into account statistical errors are presented.

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5. Fig. 4. Dependences of the average values of the squares of the transverse components of the momenta of associated particles (K0, proton, π+, π–) in the new coordinate system on the transverse momentum of the Λ-hyperon for proton-proton interactions in the Pythia (∆) and FTF (●) models and for deuteron-deuteron interactions (○) at an energy in the center-of-mass system of NN collisions of √S = 10 GeV. The calculations are presented taking into account statistical errors.

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