Self-similarity of Proton Spin

0457907 - ÚJF 2016 RIV IT eng C - Conference Paper (international conference)
Tokarev, M. V. - Aparin, A. A. - Zborovský, Imrich
Self-similarity of Proton Spin.
PoS - Proceedings of Science. Trieste: International School for Advanced Studies, 2015, s. 037. ISSN 1824-8039.
[XXII International Baldin Seminar on High Energy Physics Problems. Dubna (RU), 15.09.2014-20.09.2014]
R&D Projects: GA MŠMT(CZ) LG13031
Institutional support: RVO:61389005
Keywords : Self-similarity * proton-proton collisions * asymmetry
Subject RIV: BE - Theoretical Physics

Origin of spin is one of fundamental mysteries of nature. Spin of proton itself and of point-like quarks is equal to 1/2h. Composition of the proton spin from spins of quarks, gluons and processes including formation and annihilation of the quark-antiquark pairs indicate on a repeated pattern in the internal spin structure over a wide scale range. New hypothesis of self-similarity of the proton spin composition is suggested and discussed. The concept of z-scaling previously developed for analysis of inclusive reactions is applied for description of processes with polarized particles. Generalized characteristics of proton spin structure, namely the spin-dependent fractal dimensions, are suggested. Possibilities to extract information on these quantities from double spin asymmetries are discussed. New high-precision RHIC data on the asymmetries in polarized proton-proton collisions are analyzed in the framework of the z-scaling. Information on spin-dependent fractal dimensions of proton is obtained. A microscopic scenario of constituent interactions developed within the z-scaling approach is used for study of the interactions with polarized protons. Spin dependence of the constituent energy loss as a function of the momentum of the produced hadron and the energy of collision is estimated.
Permanent Link: http://hdl.handle.net/11104/0258249