2001/12/21 by Y. Maeda, Yoshikazu Maeda, M. Segawa +23
Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0112012
7 pages, Latex, 3 Postscript figures, Submitted to Phys. Lett. B
openalex publication_date 2001/12/21 · arxiv created 2002/01/14 · arxiv updated 2009/12/01 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28
The analyzing power of pp→ ppπ0 reaction has been measured at the beam energy of 390 MeV. The missing mass technique of final protons has been applied to identify the π0 production event. The dependences of the analyzing power on the pion emission-angle and the relative momentum of the protons have beenobtained. The angular dependence could be decomposed by the Legendre polynomial and the relative contribution of the P21 to P11 function is less than 20%. The P-state amplitude is found to be the dominant component of the π production near the threshold. The momentum dependence of the analyzing power has been studied to obtain the information about the pion production mechanism. It has been deduced that the pion production due to the long range interaction plays an important role in the momentum dependence of the P-state amplitude.