Search for hidden charm states decaying intoJ/ψ or ψ’ plus pions

Authors:

LAL. Antoniazzi
L. Antoniazzi
MAM. Arenton
M. Arenton
ZCZ. Cao
Z. Cao
TCT. Chen
T. Chen
SCS. Conetti
S. Conetti
GCG. Corti
G. Corti
BCB. Cox
B. Cox
SDS. Delchamps
S. Delchamps
LFL. Fortney
L. Fortney
KGK. Guffey
K. Guffey
MHM. Haire
M. Haire
PIP. Ioannou
P. Ioannou

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1 October 1994

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 50 (7) , 4258-4264
DOI:10.1103/physrevd.50.4258
PMID:10018067

Abstract

A search has been made in 300 GeV/c

π^{\pm}

- and proton-Li interactions for production of states that decay into J/ψ or ψ’ plus one or two pions. A 2.5σ enhancement in the J/ψ

π^{0}

spectrum, possibly the recently reported

{}^{1}

P_{1}

state of charmonium, is observed at a mass of 3.527 GeV/

c^{2}

. In the J/ψ plus two pion mass spectrum, we report, together with the expected ψ’→J/ψ

π^{+}

π^{-}

, the tentative observation of a structure at a mass of 3.836 GeV/

c^{2}

. No enhancements are seen in the J/ψ

π^{\pm}

π^{\pm}

, J/ψ

π^{\pm}

π^{0}

, J/ψ

π^{\pm}

, or ψ’

π^{\pm}

mass spectra.

Keywords

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