Antiproton-proton partial-wave analysis below 925 MeV/c.

Analysis of the reaction p̄p → K+K−π0 at 900 and at 1642 MeV/c

The antiproton-proton annihilation into KKπ has been studied at incident beam momenta of 900 and 1642 MeV/c with the Crystal Barrel detector at LEAR. A partial wave analysis has been carried out. At lower momenta a J = 1−− state which is probably a superposition of the vectors φ(1680) and ρ(1700) has been observed at a mass of 1700± 8 MeV (Γ = 143± 24 MeV). There is a strong production of f0(15...

What Have We Learned from Antiproton Proton Scattering?

From recent charge exchange measurements in the extreme forward direction, an independent and precise determination of the pion nucleon coupling constant is possible. This determination has reopened the debate on the value of this fundamental coupling constant of nuclear physics. Precise measurements of charge exchange observables at forward angles below 900 MeV/c would also give a better under...

ar X iv : n uc l - th / 9 31 00 28 v 1 2 1 O ct 1 99 3 An antiproton - proton partial - wave analysis

Proton-antiproton Annihilation at 900 Mev=c into 0 0 0 , 0 0 and 0 the Crystal Barrel Collaboration

The three reactions pp ! 0 0 , 0 0 and 0 in proton-antiproton annihilation in ight at 900 MeV=c are used to search for isoscalar 0 and 2 mesons in the mass range 100

THE EUROPEAN PHYSICAL JOURNAL A Antiproton-nucleus electromagnetic annihilation as a way to access the proton timelike form factors

Contrary to the reaction p̄ p → e+e− with a high-momentum incident antiproton on a free target proton at rest, in which the invariant mass M of the e+e− pair is necessarily much larger than the p̄p mass 2m, in the reaction p̄ d → e+e−n the value of M can take values near or below the p̄p mass. In the antiproton-deuteron electromagnetic annihilation, this allows to access the proton electromagnetic ...