Evidence for a Resonant Structure of the Hadron Production from e+ e- Annihilations in the 1700-MeV-1950-MeV Center-Of-Mass Energy Region

Ambrosio, M.; Barbarino, G.; Barbiellini, G.; Barletta, A.; Bemporad, C.; Biancastelli, R.; Brosco, G.; Calvetti, M.; Castellano, M.; Costantini, F.

doi:10.1016/0370-2693(77)90503-2

Evidence for a Resonant Structure of the Hadron Production from e+ e- Annihilations in the 1700-MeV-1950-MeV Center-Of-Mass Energy Region

M. Ambrosio
(
- Naples U. and
- INFN, Naples
)
,
G. Barbarino
(
- Naples U. and
- INFN, Naples
)
,
G. Barbiellini
(
- Frascati
)
,
A. Barletta
(
- Frascati
)
,
C. Bemporad
(
- Pisa U. and
- Pisa, Scuola Normale Superiore and
- INFN, Pisa
)

May, 1977

5 pages

Published in:

Phys.Lett.B 68 (1977) 397-401

Published: 1977

DOI:

10.1016/0370-2693(77)90503-2

Report number:

LNF-77/24-P

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Abstract: (Elsevier)

We present experimental evidence for a resonant behaviour of the hadron production from e + e − annihilations at the e + e − storage ring ADONE. A Breit-Wigner fit to the enhancement present between 1800 and 1850 MeV gives the following parameters M = 1812 −13 +7 MeV, Γ = 34 −15 +21 MeV.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
HADRON: FINAL STATE
FINAL STATE: HADRON
ENHANCEMENT: (1812)
ENHANCEMENT: WIDTH
WIDTH: ENHANCEMENT
ENHANCEMENT: NARROW RESONANCE

References(6)

Figures(0)

- Annals Math.Statist. 14 83

Deep inelastic processes

Mario Greco
(
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- Frascati
)

- Nucl.Phys.B 63 (1973) 398-412
•
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pi+ pi- production by e+ e- annihilation in the rho energy range with the Orsay storage ring

et al.

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•
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Vector Mesons and e+ e- Annihilation. 1. rho, omega, phi Dominance with Inelastic and Finite Width Effects. 2. Higher Vector Mesons in a Nonet Structure. 3. Vector Meson Continuum and e+ e- Annihilation at High-Energy

F.M. Renard
(
- Montpellier U.
)

- Nucl.Phys.B 82 (1974) 1-25
•
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Evidence for an Interference Effect Between omega and phi Resonances in pi+ pi- pi0 Production with the Orsay Colliding-Beam Ring

et al.

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•
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Evidence for Resonant Structure Near 1780-MeV in e+ e- Annihilations Observed with the New Colliding Beam Ring at Orsay

et al.

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•
DOI:
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