Download Measurement of the beam normal single-spin asymmetry of Carbon-12

54. International Winter Meeting on Nuclear Physics
Contribution ID : 36
Type : Short Contribution
Measurement of the beam normal single-spin
asymmetry of Carbon-12
Wednesday, 27 January 2016 18:25 (0:20)
Abstract content
Beam-normal single-spin asymmetry in the elastic scattering of electrons is a direct probe for the
two photon exchange. At the Mainz Mictrotron, this asymmetry has been measured for Carbon-12
at a Q2 of 0.04 GeV2 . A 570 MeV continuous wave electrons beam was scattered on a carbon target
and detected by two magnetic spectrometers. Quartz glass cherenkov detectors located at the elastic
line in the spectrometer’s focal plane were used to measure the amount of scattered electrons. The
PMTs of which were read out with integrating current ADCs allowing for particle rates too high for
counting. The resulting asymmetry shows a surprising deviation from theoretical predictions.
Summary
Primary author(s) :
Presenter(s) :
Dr. ESSER, Anselm (Inst. f. Kernphysik / Uni Mainz)
Dr. ESSER, Anselm (Inst. f. Kernphysik / Uni Mainz)
Session Classification : Wednesday Afternoon
Track Classification : Nuclear Structure and Astrophysics