Nuclear neutron densities and parity violating electron scattering
نویسندگان
چکیده
منابع مشابه
Parity Violating Measurements of Neutron Densities and Nuclear Structure
Parity violating electron nucleus scattering is a clean and powerful tool for measuring the spatial distributions of neutrons in nuclei with unprecedented accuracy. Parity violation arises from the interference of electromagnetic and weak neutral amplitudes, and the Z of the Standard Model couples primarily to neutrons at low Q. Experiments are now feasible at existing facilities. We show that ...
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Measurements of parity-violating asymmetries in the scattering of longitudinally polarized electrons off unpolarized fixed targets are used to access leptonic and semi-leptonic weak neutral current amplitudes. One thrust of the current program is the measurement the elastic neutral weak amplitude at very low Q from scattering off a heavy spinless nucleus, which is sensitive to the presence of a...
متن کاملParity Violating Measurements of Neutron Densities
Parity violating electron nucleus scattering is a clean and powerful tool for measuring the spatial distributions of neutrons in nuclei with unprecedented accuracy. Parity violation arises from the interference of electromagnetic and weak neutral amplitudes, and the Z0 of the Standard Model couples primarily to neutrons at low Q2. The data can be interpreted with as much confidence as electroma...
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The longitudinal asymmetry due to Z0 exchange is calculated in quasi-elastic electron-deuteron scattering at momentum transfers |Q2| ' 0.1 GeV2 relevant for the SAMPLE experiment. The deuteron and pn scattering-state wave functions are obtained from solutions of a Schrödinger equation with the Argonne v18 potential. Electromagnetic and weak neutral oneand two-nucleon currents are included in th...
متن کاملParity Violating Measurements of Neutron Densities: Implications for Neutron Stars
Parity violating electron scattering can measure the neutron density of a heavy nucleus accurately and model independently. This is because the weak charge of the neutron is much larger then that of the proton. The Parity Radius Experiment (PREX) at Jefferson Laboratory aims to measure the root mean square neutron radius of Pb with an absolute accuracy of 1% (±0.05 Fm). This is more accurate th...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2012
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/381/1/012135