NUCLEON-NUCLEON PARITY VIOLATION EXPERIMENTS
نویسندگان
چکیده
منابع مشابه
Parity Violation and the Nucleon-nucleon System *
Theoretical and experimental work seeking to understand the phenomenon of parity violation within the nucleon-nucleon system is reviewed. Research supported in part by the National Science Foundation.
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We calculate in chiral perturbation theory the parity-violating two-pion exchange nucleon-nucleon potentials at leading one-loop order. At a distance of r = m−1 π ≃ 1.4 fm they amount to about ±16% of the parity-violating 1π-exchange potential. We evaluate also the parity-violating effects arising from 2π-exchange with excitation of virtual ∆(1232)-isobars. These come out to be relatively small...
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Two-pion exchange parity-violating nucleon-nucleon interactions from recent effective field theories and earlier fully covariant approaches are investigated. The potentials are compared with the idea to obtain better insight on the role of low-energy constants appearing in the effective field theory approach and the convergence of this one in terms of a perturbative series. The results are illu...
متن کاملSingle-nucleon experiments
We discuss the Jefferson Lab low momentum transfer data on moments of the nucleon spin structure functions g1 and g2 and on single charged pion electroproduction off polarized proton and polarized neutron. A wealth of data is now available, while more is being analyzed or expected to be taken in the upcoming years. Given the low momentum transfer selected by the experiments, these data can be c...
متن کاملSelected Parity Violation Experiments
I start by reviewing existing ~ pp measurements with particular emphasis on the recent 221 MeV ~pp measurement at TRIUMF which permitted the weak meson-nucleon coupling constants h ρ and h pp ω to be determined separately for the first time. I then review ~np experiments, with specific details of the ~np → dγ experiment now under preparation at Los Alamos National Laboratory. This experiment wi...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics E
سال: 1999
ISSN: 0218-3013,1793-6608
DOI: 10.1142/s021830139900029x