→ Σ π , Λ π and related strong coupling constant

نویسنده

  • Zhi-Gang Wang
چکیده

In this article, we calculate the strong coupling constant g among the decuplet baryons, the octet baryons and the pseudoscalar mesons in the heavy baryon chiral perturbation theory with the light-cone QCD sum rules, and study the strong decays Σ∗ → Λπ,Σπ. The numerical value of the strong coupling constant g is consistent with our previous calculation, the central values lead to a conservative estimation of the SU(3) breaking effects, about 4%. PACS numbers: 13.30.-a; 13.75.Gx

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Fe b 20 09 Strong decays Σ ∗ → Σ π , Λ π and related strong coupling constant Zhi -

In this article, we calculate the strong coupling constant g among the decuplet baryons, the octet baryons and the pseudoscalar mesons in the heavy baryon chiral perturbation theory with the light-cone QCD sum rules, and study the strong decays Σ∗ → Λπ,Σπ. The numerical value of the strong coupling constant g is consistent with our previous calculation, the central values lead to small SU(3) br...

متن کامل

→ Σ π , Λ π and related strong coupling constant Zhi -

In this article, we calculate the strong coupling constant g among the decuplet baryons, the octet baryons and the pseudoscalar mesons in the heavy baryon chiral perturbation theory with the light-cone QCD sum rules, and study the strong decays Σ∗ → Λπ,Σπ. The numerical value of the strong coupling constant g is consistent with our previous calculation, the central values lead to small SU(3) br...

متن کامل

Measurement of the Σ π photoproduction line shapes near the Λ ( 1405 )

The reaction γ + p → K + + Σ + π was used to determine the invariant mass distributions or " line shapes " of the Σ + π − , Σ − π + and Σ 0 π 0 final states, from threshold at 1328 MeV/c 2 through the mass range of the Λ(1405) and the Λ(1520). The measurements were made with the CLAS system at Jefferson Lab using tagged real photons, for center-of-mass energies 1.95 < W < 2.85 GeV. The three ma...

متن کامل

Σ-nuclear spin-orbit coupling from two-pion exchange

Using SU(3) chiral perturbation theory we calculate the density-dependent complexvalued spin-orbit coupling strength UΣls(kf ) + iWΣls(kf ) of a Σ hyperon in the nuclear medium. The leading long-range ΣN interaction arises from iterated one-pion exchange with a Λ or a Σ hyperon in the intermediate state. We find from this unique long-range dynamics a sizeable “wrong-sign” spin-orbit coupling st...

متن کامل

Sorting from Noisy Information

This paper studies problems of inferring order given noisy information. In these problems there is an unknown order (permutation) π on n elements denoted by 1, . . . , n. We assume that information is generated in a way correlated with π. The goal is to find a maximum likelihood π given the information observed. We will consider two different types of observations: noisy comparisons and noisy o...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009