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BACCI 1974

Bacci, C. et al.
Preliminary Result of Frascati (ADONE) on the Nature of a New 3.1 GeV Particle Produced in e⁺ e^– Annihilation
Phys. Rev. Lett. 33 (1974) 1408; Phys. Rev. Lett. 33 (1974) 1649;

Abstracts
We report on the results at ADONE to study the properties of the newly found 3.1 BeV particle.

Accelerator FRAS-ADONE Detectors ADONE-2GAMMA

Related references
More (later) information appears in
R. Baldini-Celio, M. Berna-Rodini, and G. Capon, Lett. Nuovo Cim. 11 (1974) 711;
See also
J. E. Augustin et al., Phys. Rev. Lett. 33 (1974) 1406;
J. J. Aubert et al., Phys. Rev. Lett. 33 (1974) 1404;

Reactions

	e+ e– J /ψ(1S)	3.090-3.112 GeV (Ecm)	cs
	e+ e– 3hadron (hadrons)	3.090-3.112 GeV (Ecm)	cs

Particles studied

J /ψ(1S)

ex, mass, qn

Accelerator FRAS-ADONE Detectors MEA

Reactions

	e+ e– J /ψ(1S)	3.090-3.112 GeV (Ecm)	cs
	e+ e– 2hadron (hadrons)	3.090-3.112 GeV (Ecm)	cs
	e+ e– e– e+	3.090-3.112 GeV (Ecm)	cs
	e+ e– μ– μ+	3.090-3.112 GeV (Ecm)	cs

Particles studied

J /ψ(1S)

ex, mass, qn

Accelerator FRAS-ADONE Detectors PBARP

Reactions

	e+ e– J /ψ(1S)	3.090-3.112 GeV (Ecm)	cs
	e+ e– 2hadron (hadrons)	3.090-3.112 GeV (Ecm)	cs
	e+ e– e– e+	3.090-3.112 GeV (Ecm)	cs
	e+ e– μ– μ+	3.090-3.112 GeV (Ecm)	cs
	J /ψ(1S) μ– μ+

Particles studied

J /ψ(1S)

ex, mass, pw, qn

Record comments
Confirmation of the existence of the J /ψ(1S).

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