We measured the elastic scattering of αα at sqrt(s) = 126 GeV and of αp at sqrt(s) = 89 GeV. For αα, the differential cross section dσ/dt has a diffractive pattern minima at |t| = 0.10 and 0.38 GeV^2. At small |t| = 0.05−0.07 GeV^2, this cross section behaves like exp[(100 ± 10) t]. Extrapolating a fit to the data to the optical point, we obtained for the total cross section α_tot(αα) = 250 ± 50 mb and an integrated elastic cross section σ_e1(αα) = 45 ± mb. Another method of estimating σ_tot(αα), based on measuring the interaction rate, yielded 295 ± 40 mb. For αp, dσ/dt has aminimum at |t| = 0.20 GeV^2, and for 0.05 < |t| < 0.18 GeV^2 behaves like exp[(41 ± 2) t]. Extrapolating this slope to |t| = 0, we found σ_tot(αp) = 130 ± 20 and σ_e1(αp) = 20 ± 4mb. Results on pp elastic scattering at sqrt(s) = 63 GeV agree with previous ISR experiments.
Measurements of elastic scattering in alpha-alpha and alpha-proton collisions at the CERN intersecting storage rings
ANZIVINO, Giuseppina;VALDATA, Marisa
1982
Abstract
We measured the elastic scattering of αα at sqrt(s) = 126 GeV and of αp at sqrt(s) = 89 GeV. For αα, the differential cross section dσ/dt has a diffractive pattern minima at |t| = 0.10 and 0.38 GeV^2. At small |t| = 0.05−0.07 GeV^2, this cross section behaves like exp[(100 ± 10) t]. Extrapolating a fit to the data to the optical point, we obtained for the total cross section α_tot(αα) = 250 ± 50 mb and an integrated elastic cross section σ_e1(αα) = 45 ± mb. Another method of estimating σ_tot(αα), based on measuring the interaction rate, yielded 295 ± 40 mb. For αp, dσ/dt has aminimum at |t| = 0.20 GeV^2, and for 0.05 < |t| < 0.18 GeV^2 behaves like exp[(41 ± 2) t]. Extrapolating this slope to |t| = 0, we found σ_tot(αp) = 130 ± 20 and σ_e1(αp) = 20 ± 4mb. Results on pp elastic scattering at sqrt(s) = 63 GeV agree with previous ISR experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
