Meson-baryon effective chiral Lagrangians to Script O(q3)
نویسندگان
چکیده
منابع مشابه
Meson-Baryon Effective Chiral Lagrangians to O(q3)
We construct the complete and minimalO(q2) and O(q3) three-flavour Lorentz invariant chiral meson-baryon Lagrangians for the first time in the literature. We compare with previous three-flavour studies reducing the number of independent monomials and adding new ones that were missing.
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After our work [1] was published, Frink and Meißner [2] pointed out that the O(q3) three-flavour meson-baryon chiral Lagrangian presented there was not minimal. Here, we discuss their findings and revise ours accordingly. We find out eight monomials in the Lagrangian presented in [1] are not independent, but in addition, two monomials were wrongly discarded there which, as a result, makes the a...
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The s-wave meson-baryon interaction is studied using the lowest-order chiral Lagrangian in a unitary coupled-channels Bethe-Salpeter equation. In the strangeness S = −1 sector the low-energy K−p dynamics leads to the dynamical generation of the Λ(1405) as a K̄N state, along with a good description of the K−p scattering observables. At higher energies, the Λ(1670) is also found to be generated dy...
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We develop a coupled channel unitary approach describing the behavior at higher energies of systems whose low-energy dynamics is given by effective O(p) and O(p) chiral Lagrangians. Our free parameters are those of the O(p) Lagrangian. When applied to the meson-meson interaction, it yields a remarkable agreement with data up to √ s ' 1.2 GeV, dynamically generating the σ, f0, a0, ρ and K ∗ reso...
متن کاملOn the chiral effective meson-baryon Lagrangian at third order
Recently, Oller et al. [1] have presented a complete and “minimal” chiral effective Lagrangian for three flavor baryon chiral perturbation theory to third order in the chiral expansion, utilizing the methods outlined in Ref. [2] for constructing the fourth order two flavor effective Lagrangian. The first attempt to construct the SU(3) meson-baryon Lagrangian goes back to Krause [3]. However, he...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2006
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2006/09/079