Parity-violating neutron spin rotation in a liquid parahydrogen target
نویسندگان
چکیده
منابع مشابه
Parity-Violating Neutron Spin Rotation in a Liquid Parahydrogen Target
Our understanding of hadronic parity violation is far from clear despite nearly 50 years of theoretical and experimental progress. Measurements of low-energy parity-violating observables in nuclear systems are the only accessible means to study the flavor-conserving weak hadronic interaction. To reduce the uncertainties from nuclear effects, experiments in the few and two-body system are essent...
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In the meson exchange model of weak nucleon-nucleon (NN) interactions, the exchange of virtual mesons between the nucleons is parameterized by a set of weak meson exchange amplitudes. The strengths of these amplitudes from theoretical calculations are not well known, and experimental measurements of parity-violating (PV) observables in different nuclear systems have not constrained their values...
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Various theories beyond the standard model predict new particles with masses in the sub-eV range with very weak couplings to ordinary matter. A parity-odd interaction between polarized nucleons and unpolarized matter proportional to g(V)g(A)s · p is one such possibility, where s[over →] and p[over →] are the spin and the momentum of the polarized nucleon, and g(V) and g(A) are the vector and ax...
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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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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 Research of the National Institute of Standards and Technology
سال: 2005
ISSN: 1044-677X
DOI: 10.6028/jres.110.026