Chiral non-perturbative approach to the isoscalar s-wave ππ interaction in a nuclear medium
نویسندگان
چکیده
منابع مشابه
Chiral nonperturbative approach to the isoscalar s - wave ππ interaction in a nuclear medium
Chiral nonperturbative approach to the isoscalar s-wave ππ interaction in a nuclear medium Abstract The s-wave isoscalar amplitude for ππ scattering in a nuclear medium is evaluated using a nonperturbative unitary coupled channels method and the standard chiral Lagrangians. The method has proved successful to describe the ππ properties in the scalar isoscalar channel up to 1.2 GeV giving rise t...
متن کامل- th / 9 71 20 47 v 2 3 1 A ug 1 99 8 Chiral nonperturbative approach to the isoscalar s - wave ππ interaction in a nuclear medium
Chiral nonperturbative approach to the isoscalar s-wave ππ interaction in a nuclear medium Abstract The s-wave isoscalar amplitude for ππ scattering in a nuclear medium is evaluated using a nonperturbative unitary coupled channels method and the standard chiral Lagrangians. The method has proved successful to describe the ππ properties in the scalar isoscalar channel up to 1.2 GeV giving rise t...
متن کاملNon perturbative chiral approach to s-wave K̄N interactions
The s-wave meson-nucleon interaction in the S = −1 sector is studied by means of coupled-channel Lippmann Schwinger equations, using the lowest order chiral Lagrangian and a cut off to regularize the loop integrals. The method reproduces succesfully the Λ(1405) resonance and the K−p → K−p, K̄0n, π0Λ, π0Σ, π+Σ−, π−Σ+ cross sections at low energies. The inclusion of the ηΛ, ηΣ0 channels in the cou...
متن کاملMeson-Meson interaction in a non-perturbative chiral approach
A non-perturbative method which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe the meson-meson interaction up to about 1.2 GeV. The approach uses the O(p2) and O(p4) chiral Lagrangians. The seven free parameters of the O(p4) Lagrangian are fitted to the data. The results are in good agreement with a vast amount of experimental analyses. The ...
متن کامل→ ππ decay in nuclear medium ⋆
We calculate the width for the ω → ππ decay in nuclear medium. Chiral dynamics and low-density approximation are used. At densities around twice the nuclear saturation density we estimate the partial width for the decay of the longitudinal mode to be of the order of a few tens of MeV, and for the transverse mode a few times less.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 1998
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(98)00578-8