121839880
The influence of the nuclear medium on K+ total cross sections
Abstract The study of the K + total cross sections on a wide range of nuclei has revealed important modifications of the free-space K + -nucleon interaction when the nucleon is embedded in a nucleus. Data indicating such an effect were first obtained in a comparison of the total cross sections on carbon and deuterium. In this letter we report new measurements on 6 Li, silicon, and calcium, and demonstrate that the previously reported modifications occur quite generally.
119972213
Scattering of antiprotons from carbon at 46.8 MeV
Abstract Antiproton-carbon elastic and inelastic scattering cross sections have been measured at 46.8 MeV over an angular range 6° ⩽ θ ⩽ 59° with a magnetic spectrometer. Fits to the elastic and inelastic 4.44 MeV excited state cross sections put realistic limits on the strengths of the real and imaginary parts of the antiproton-carbon optical potential. The continuum cross section due to carbon break-up appears to be smaller than it is for corresponding proton data.
124125076
K+ nucleus reaction and total cross sections: New analysis of transmission experiments
The attenuation cross sections measured in transmission experiments at the alternating-gradient synchrotron for K{sup +} on {sup 6}Li, C, Si, and Ca at p{sub L} = 488, 531, 656, and 714 MeV/c are reanalyzed in order to derive total ({sigma}{sub T}) and reaction ({sigma}{sub R}) cross sections. The effect of plural (Moli{grave e}re) scattering is properly accounted for, leading to revised values of {sigma}{sub T}. We demonstrate the model dependence of these values, primarily due to the choice of K{sup +} nuclear optical potential used to generate the necessary Coulomb-nuclear and nuclear elastic corrections. Values of {sigma}{sub R} are also derived, for the first time, from the same data and exhibit a remarkable degree of model independence. The derived values of {sigma}{sub T} and {sigma}{sub R} exceed those calculated by the first-order t{rho} optical potential for C, Si, and Ca, but not for {sup 6}Li, particularly at 656 and 714 MeV/c where the excess is 10{endash}25{percent}. Relative to {sup 6}Li, this excess is found to be nearly energy independent and its magnitude of 15{endash}25{percent} is not reproduced by any nuclear medium effect studied so far. {copyright} {ital 1997} {ital The American Physical Society}
120209732
Helium ions from the interaction of 70-MeV pions with nuclei
He ions emitted in the interaction of 70-MeV pions with carbon, aluminum, nickel, silver, and gold were measured directly at theta = 90/sup 0/. Cross sections and energy spectra are presented. Calculations of intranuclear cascades followed by evaporation reproduced the experimental data reasonably well. The results of the calculations imply that: (1) pion absorption in flight plays a major role in reactions in which ..cap alpha.. particles are emitted; and (2) one- ''..cap alpha..''-removal lines, observed in deexcitation ..gamma..-ray experiments, do not imply large probability for real ..cap alpha.. emission. The ..pi../sup -/ to ..pi../sup +/ ratio of cross sections was found to be about 1.4.
209914752
(He3,d) stripping to unbound analog states in Cu isotopes
121371364
Decay modes of analog states studied by the (He3,dp) reaction
119203743
RECAST — extending the impact of existing analyses
Searches for new physics by experimental collaborations represent a significant investment in time and resources. Often these searches are sensitive to a broader class of models than they were originally designed to test. We aim to extend the impact of existing searches through a technique we call recasting. A framework designed to facilitate the usage of this technique, called RECAST, is presented. We illustrate the issues and subtleties involved through several examples, including new results obtained from the reanalysis of archived LEP data. Website:www.recast.it