ar X iv : h ep - e x / 98 12 01 9 v 1 1 6 D ec 1 99 8 Hyperon Physics Results from SELEX 1 The Selex Collaboration
نویسندگان
چکیده
In parallel to charm hadroproduction the experiment Selex (E781) at Fermilab is pursuing a rich hyperon physics program. Selex employs a 600 GeV/c beam consisting of 50 % Σ− and π− each. The three-stage magnetic spectrometer covering 0.1 ≤ xF ≤ 1.0 features a high-precision silicon vertex system, broad-coverage particle identification using TRD and RICH, and a three-stage lead glass photon calorimeter. First results for the Σ− charge radius, total Σ−nucleon cross sections, and a new upper limit for the radiative width of the Σ(1385)− are presented.
منابع مشابه
ar X iv : h ep - p h / 98 12 39 9 v 1 1 6 D ec 1 99 8 1 The Tau Lepton : Particle Physics in a Nutshell
τ decays 5. Beyond the Standard Model 5.1 CP violation in hadronic τ decays 5.2 " Forbidden " decays.
متن کاملar X iv : h ep - e x / 01 06 05 3 v 1 1 3 Ju n 20 01 Measurement of the Σ − Charge Radius by Σ − – Electron Elastic Scattering The SELEX
The Σ− mean squared charge radius has been measured in the space-like Q range 0.035–0.105 GeV/c by elastic scattering of a Σ− beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain 〈r2 ch〉Σ− = (0.61 ± 0.12 (stat.) ± 0.09 (syst.)) fm. The proton and π− charge radii were measured as well ...
متن کاملar X iv : h ep - e x / 01 06 05 3 v 2 8 O ct 2 00 1 Measurement of the Σ − Charge Radius by Σ − – Electron Elastic Scattering The SELEX
The Σ− mean squared charge radius has been measured in the space-like Q range 0.035–0.105 GeV/c by elastic scattering of a Σ− beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain 〈r2 ch〉Σ− = (0.61 ± 0.12 (stat.) ± 0.09 (syst.)) fm. The proton and π− charge radii were measured as well ...
متن کامل