Meson-nucleus scattering lengths and sigma-terms
نویسندگان
چکیده
منابع مشابه
Pseudoscalar Meson and Charmed Baryon Scattering Lengths
Up to now many heavy hadrons have been discovered experimentally. Their inner structures and interactions attract much attention. Some of them are speculated to be possible new hadron states beyond the traditional quark model. For example, the newly discovered Zb states are treated as the B̄ (∗)B∗ molecular states [1, 2]. Many other molecular states, such as those composed of ΞcΞc, DD̄ ∗, are als...
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A new QCD sum rule analysis on the spin-isospin averaged ρ, ω and φ meson-nucleon scattering lengths is presented. By introducing the constraint relation on the the low energy limit of the vector-current nucleon forward scattering amplitude, we get aρ = −0.47± 0.05 fm, aω = −0.41 ± 0.05 fm and aφ = −0.15 ± 0.02 fm, which suggests that these V − N interactions are attractive. It is also proved t...
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ژورنال
عنوان ژورنال: Il Nuovo Cimento A
سال: 1981
ISSN: 0369-3546,1826-9869
DOI: 10.1007/bf02902673