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[en] The charmonium chi states are observed in both π- and p Be interactions near 200 GeV/c via their radiative decay into J/psi. The chi(3510) and chi(3555) are produced with roughly equal cross sections in π- collisions while the chi(3555) dominates in p collisions. Simple gluon fusion can account for chi production with incident protons but additional mechanisms are needed for incident π-
Journal
Physical Review Letters; ISSN 0031-9007; 
; v. 54(8); p. 753-756
; v. 54(8); p. 753-756