Measurement of the Σ− charge radius by Σ−–electron elastic scattering
نویسندگان
چکیده
منابع مشابه
Measurement of the Σ− Charge Radius at Selex
The charge radii of Σ and π have been determined by direct elastic scattering on shell electrons. The measurement was performed in the framework of the Selex (E781) charm hadroproduction experiment at Fermilab which employs a 600 GeV/c high-intensity Σ/π beam and a three-stage magnetic spectrometer covering 0.1 ≤ xF ≤ 1.0. Scattering angles and momenta of both hadron and electron were measured ...
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 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 کاملCoulomb Corrections to Elastic Electron-Proton Scattering and the Proton Charge Radius
Recent values of the proton charge radius derived from the Lamb shift in electronic hydrogen tend to be larger than those from electron scattering. Therefore low-momentum-transfer scattering data from different groups and laboratories have been reanalyzed with Coulomb and recoil corrections included. This was done by calculating at each scattering angle and scattering energy the corresponding c...
متن کاملHigh Precision Measurement of the Proton Charge Radius
We propose to perform a high precision e − p elastic cross sections measurement at very low four-momentum transfer squared, Q, from 10−4 to 10−2 (GeV/c) range using a high resolution calorimeter. The absolute value of the e−p cross sections will be controlled by a well known QED process, the Møller scattering, which will be continuously measured in this experiment within similar kinematics and ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2001
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)01285-0