@article{3046688,
    title = "SEARCH FOR HIDDEN CHARM STATES DECAYING INTO J-PSI OR PSI' PLUS PIONS",
    author = "ANTONIAZZI, L and ARENTON, M and CAO, Z and CHEN, T and CONETTI, S and and CORTI, G and COX, B and DELCHAMPS, S and FORTNEY, L and GUFFEY, K and and HAIRE, M and IOANNOU, P and JENKINS, CM and JUDD, DJ and KOURKOUMELIS, C and and MANOUSAKISKATSIKAKIS, A and KUZMINSKI, J and LECOMPTE, T and and MARCHIONNI, A and HE, M and MAZUR, PO and MURPHY, CT and PRAMANTIOTIS, P and and RAMEIKA, R and RESVANIS, LK and ROSATI, M and ROSEN, J and SHEN, C and and SHEN, Q and SIMARD, A and SMITH, RP and SPIEGEL, L and STAIRS, DG and and TAN, Y and TESAREK, RJ and TURKINGTON, T and TURNBULL, L and TURKOT, and F and TZAMARIAS, S and VOULGARIS, G and WAGONER, DE and WANG, C and and YANG, W and YAO, N and ZHANG, N and ZHANG, X and ZIOULAS, G and ZOU, B",
    journal = "Physical Review D",
    year = "1994",
    volume = "50",
    number = "7",
    pages = "4258-4264",
    publisher = "AMERICAN PHYSICAL SOC",
    issn = "2470-0010, 2470-0029",
    doi = "10.1103/PhysRevD.50.4258",
    abstract = "A search has been made in 300 GeV/c pi+/– and proton-Li interactions
for production of states that decay into J/psi or psi’ plus one or two
pions.  A 2.5sigma enhancement in the J/psi pi0 spectrum, possibly the
recently reported 1P1 state of charmonium, is observed at a mass of
3.527 GeV/c2.  In the J/psi plus two pion mass spectrum, we report,
together with the expected psi’ –> J/psi pi+pi-, the tentative
observation of a structure at a mass of 3.836 GeV/c2.  No enhancements
are seen in the J/psi pi+/-pi+/-, J/psi pi+/-pi0, J/psi pi+/-, or psi’
pi+/- mass spectra."
}