ar X iv : h ep - p h / 05 08 26 4 v 2 1 1 N ov 2 00 5 Scalar σ meson at finite temperature in nonlocal quark model
نویسنده
چکیده
Properties and temperature behavior of π and σ bound states are studied in the framework of the nonlocal model with a separable interaction kernel based on the quark Dyson-Schwinger and the meson Bethe-Salpeter equations. Mπ(T ), fπ(T ), Mσ(T ) and Γσ→ππ(T ) are considered above and below the deconfinement and chiral restoration transitions.
منابع مشابه
/ 05 08 26 4 v 1 2 5 A ug 2 00 5 Scalar σ meson at finite temperature in nonlocal quark model
Properties and temperature behavior of π and σ bound states are studied in the framework of the nonlocal model with a separable interaction kernel based on the quark Dyson-Schwinger and the meson Bethe-Salpeter equations. Mπ(T ), fπ(T ), Mσ(T ) and Γσ→ππ(T ) are considered above and below the deconfinement and chiral restoration transitions.
متن کاملar X iv : h ep - p h / 03 11 14 4 v 1 1 1 N ov 2 00 3 The Scalar Meson Sector and the σ , κ Problem
In the light scalar meson sector (M < ∼ 1.8 GeV) one expects at least one qq̄ nonet and a glueball, possibly also multi-quark states. We discuss the present phenomenological evidence for σ and κ particles; if real, they could be members of the lightest (quark or multi-quark) nonet together possibly with a0(980) and f0(980). Alternatively, the lightest nonet could include f0(980) but not σ and κ ...
متن کاملar X iv : h ep - p h / 05 05 16 1 v 1 1 8 M ay 2 00 5 Productions of σ meson in J / ψ and ψ ( 2 s ) decays Bing
Productions of σ meson in J/ψ and ψ(2s) decays Abstract Productions of scalar meson(σ) in the decays of J/ψ → ω + σ,J/ψ → γ + σ and ψ(2s) → ω + σ, J/ψ + σ, γ + σ and ee + annihilations in the regions of J/ψ and ψ are studied 1
متن کاملar X iv : h ep - p h / 02 08 24 2 v 2 1 3 N ov 2 00 2 Nucleon strangeness and spin crisis ?
We summarize three alternative extensions of the quark-valence picture of nucleon strangeness and spin, including (1) gluon spin in QCD, (2) Bjorken sum rule and QCD, (3) D–E meson mixing and tadpole leakage. All three approaches suggest that ∼ 40% of the nucleon’s spin (as well as its momentum) resides with quarks, but that less than 6% is due to strange quarks.
متن کاملX iv : h ep - p h / 03 11 27 5 v 1 2 1 N ov 2 00 3 Updated analysis of meson - nucleon sigma terms in the perturbative chiral quark model
Updated analysis of meson-nucleon sigma terms in the perturbative chiral quark model Abstract We present an updated analysis of meson-baryon sigma terms in the per-turbative chiral quark model, which is based on effective chiral Lagrangian. The new feature concerns the inclusion of excited states in the quark prop-agator. Its influence on meson loops is shown to lead in particular for the pion-...
متن کاملذخیره 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 2005