Energy-Dependent Measurements Of The Pp Elastic Analyzing Power And Narrow Dibaryon Resonances

Y Kobayashi,K Kobayashi,Takashi Nakagawa,H Shimizu,Hidefumi Yoshida,H Ohnuma,J A Holt,G Glass,J C Hiebert,R A Kenefick,S Nath,L C Northcliffe,A Simon,S Hiramatsu, Y Mori,Hiroto Sato,Akira Takagi,T Toyama,Akira Ueno,K Imai

NUCLEAR PHYSICS A（1994）

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摘要

The energy dependence of the pp elastic analyzing power has been measured using an internal target during polarized beam acceleration. The data were obtained in incident-energy steps varying from 4 to 17 MeV over an energy range from 0.5 to 2.0 GeV. The statistical uncertainty of the analyzing power is typically less than 0.01. A narrow structure is observed around 2.17 GeV in the two-proton invariant mass distribution. A possible explanation for the structure with narrow resonances is discussed.

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关键词

NUCLEAR REACTIONS H-1 (POLARIZED P, 2P), E = 0.5-2 GEV, MEASURED ANALYZING POWER A(E),THETA(LAB)=68.0-DEGREES, INTERNAL POLYETHYLENE STRING TARGET

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