F. Sebastiani

Study of (π+π-π+π-) and (π+π-π0) channel in e+e- annihilation at (1.450÷1.875) GeV cm. energy

The study of (π+π-π+π-) and (π+π-π0) channel in e+e- annihilation at (1.450÷1.875) GeV cm. energy is presented

EVIDENCE FOR THE EXISTENCE OF A NEW VECTOR MESON OF MASS 1.82 GeV OBSERVED IN e+e- ANNIHILATIONS AT ADONE

Evidence is presented for the occurrence in e+e− annihilation of a new vector meson of mass 1821 ± 16 MeV and Γ = 31 ± 15 MeV.

Momentum analysis of kaon and pion pairs produced from time-like photons at 1.6 GeV energy

We present results for the total cross section of e+e− annihilation into two hadrons at 1.6 GeV: σππ = σKK = (1.8 ± 1.1) × 10-33 cm2.From these values we obtain the time-like electromagnetic form factors these mesons: |Fπ|2 = 0.24 ± 0.14 and |FK|2 = 0.46 ± 0.26.

STUDY OF (PI+ PI- PI+ PI-) AND (PI+ PI- PI0) CHANNEL IN E+ E- ANNIHILATION AT 1.450-GEV - 1.875-GEV center-of-mass ENERGY

The study of (π+π-π+π-) and (π+π-π0) channel in e+e- annihilation at (1.450÷1.875) GeV cm. energy is presented

Multihadron production from e+e− annihilation at 1.6 c.m. energy

The results obtained in the investigation of the multihadron production in e+e- annihilation at 1.6 GeV cm energy are presented

Description and performance of MEA, The magnetic detector at adone

Abstract The experimental detector at Adone, MEA, which operates with its magnetic field perpendicular to the e + e − beams is described. Studies of the magnetic compensation for operation at Adone and resulting magnetic fields are presented. Particles are detected and analyzed using narrow-gap and wide-gap spark chambers which are triggered by scintillation and proportional counters. Momentum measurements for charged particles are made with Δ / p / p = ±0.07 at p = 1 Gev/ c ( B = 2.5 kG) and angles are measured to better than ± 1.5° over a solid angle of ∼0.3 × 4 π sr.

Search for narrow resonances in e+e− annihilation into hadrons at adone in the mass region 2.5–3.0 GeV/c2

Abstract The mass region 2.5 to 3.0 GeV/ c 2 has been searched for evidence of ψ-like narrow resonance in e + e − annihilation into hadrons. No evidence for new narrow resonances has been found with a sensitivity of about the 10% of the integrated cross section of the J/ ψ (3100).

Measurement of the J/ψ(3100) decay widths into e + e − and Μ + Μ − at adone

W e r e p o r t t h e e x p e r i m e n t a l r e su l t s o b t a i n e d a t A d o n e b y t he M E A Group on t he J /+(3100) decay in to l ep ton pai rs . P r e l i m i n a r y resu l t s on t h e i n t e g r a t e d crosssec t ions for t h e c h a n n e l s c + e ~ h a d r o n s , ~+~-, e+e h a v e been r e p o r t e d (i). I n th i s p a p e r we give r e su l t s on t he e+c a n d ~+~pa i r a n g u l a r d i s t r i b u t i o n s a n d on t h e p a r t i a l decay w id th s . These r e su l t s t u r n ou t to be co inpa t ib l e w i t h a j ~ e = 1-a s s i g n m e n t (2) for t h e J /+(3100) .

Hadronic cross-section in e+e- annihilation from 1.45 to 1.80 GeV

Measurements of the hadronic cross section in e+e- annihilation from 1.45 to 1.80 GeV are presented

Resonant K*(892) Production in Multihadron e+e - Annihilation.

Preliminary results on resonant K*(892) production in multihadron e+e- annihilation are presented