An EFT for the weak ΛN interaction
نویسندگان
چکیده
منابع مشابه
An EFT for the weak Λ N interaction ∗
The nonleptonic weak |∆S| = 1 ΛN interaction, responsible for the dominant, non-mesonic decay of all but the lightest hypernuclei, is studied in the framework of an effective field theory. The long-range physics is described through tree-level exchange of the SU(3) Goldstone bosons (π and K), while the short-range potential is parametrized in terms of lowest-order contact terms obtained from th...
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The lifetime of the Λ–hyperon in heavy hypernuclei – as measured by the COSY–13 Collaboration in proton – Au, Bi and U collisions at COSY–Jülich – has been analyzed to yield τΛ = (145 ± 11) ps. This value for τΛ is compatible with the lifetime extracted from antiproton annihilation on Bi and U targets, however, much more accurate. Theoretical models based on the meson exchange picture and assum...
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The perspects of utilizing the strangeness-production reaction γd → K + Λn for the determination of the Λn low-energy scattering parameters are investigated. The spin observables that need to be measured in order to isolate the Λn singlet (1 S0) and triplet (3 S1) states are identified. Possible kinematical regions where the extraction of the Λn scattering lengths might be feasible are discussed.
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The nonleptonic weak |∆S| = 1 ΛN interaction, responsible for the dominant, non-mesonic decay of all but the lightest hypernuclei, is studied in the framework of an effective field theory. The long-range physics is described through tree-level exchange of the SU(3) Goldstone bosons (π and K), while the short-range potential is parametrized in terms of lowest-order contact terms obtained from th...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2005
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2005.01.008