2011/12/31 by Yachao Qian, Ismail Zahed, Ismaïl Zahed · 14 citations
Physics and Astronomy · #Asymmetry #Deep inelastic scattering #High-Energy Particle Collisions Research #Inelastic scattering #Instanton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Production (economics) #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Range (aeronautics) #Scattering #Spin (aerodynamics) #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevd.86.014033
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 86(1) (American Physical Society) · 13 pages, 17 figures, Latex
openalex publication_date 2012/07/27 · arxiv created 2012/09/02 · arxiv updated 2021/02/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We revisit the effects of QCD instantons in semi-inclusive deep inelastic scattering. We show that large single spin asymmetry (SSA) effects can be induced in longitudinally and transversely polarized proton targets. The results are in agreement with most of the reported data for pion and kaon production. The same effects are found to be important in polarized proton on proton scattering for both charged and chargeless pion productions. The results agree with the reported data in a wide range of √(s)=19.4--200 GeV. We predict the SSA for \ensuremathπ^\ifmmode±\else\textpm\fi production in p_\ensuremath\uparrowp in the collider range of √(s)=62.4--500 GeV. The backward \ensuremathπ^\ifmmode±\else\textpm\fi and \ensuremathπ0 productions for the SSA in p_\ensuremath\uparrowp collisions are predicted to coincide at large √(s).