4 σ meson mass and width at finite density

نویسندگان

  • M. J. Vicente Vacas
  • E. Oset
چکیده

The σ meson mass and width are studied at finite baryonic density in the framework of a chiral unitary approach which successfully reproduces the meson meson phase shifts and generates the f 0 and σ resonances in vacuum.

برای دانلود 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

2 00 2 σ meson mass and width at finite density

The σ meson mass and width are studied at finite baryonic density in the framework of a chiral unitary approach which successfully reproduces the meson meson phase shifts and generates the f 0 and σ resonances in vacuum.

متن کامل

Strangeness and charm at FAIR

We study the properties of strange and charm mesons in hot and dense matter within a selfconsistent coupled-channel approach for the experimental conditions of density and temperature expected for the CBM experiment at FAIR/GSI. The in-medium solution at finite temperature accounts for Pauli blocking effects, mean-field binding on all the baryons involved, and meson self-energies. In the strang...

متن کامل

Chiral quark model with infrared cut - off for the description of meson properties in hot matter

A simple chiral quark model of the Nambu–Jona-Lasinio (NJL) type with a quark confinement mechanism is constructed for the description of the light meson sector of QCD at finite temperature. Unphysical quark production thresholds in the NJL model are excluded by an infrared cutoff in the momentum integration within quark loop diagrams. This chiral quark model satisfies the low energy theorems. ...

متن کامل

ar X iv : h ep - p h / 00 10 03 9 v 1 5 O ct 2 00 0 1 Chiral Symmetry Restoration and the σ - meson ∗ )

One of the most intriguing phenomena in QCD is the dynamical breaking of chiral symmetry (DBχ). This explains the existence of the pion and dictates most of the low energy phenomena in hadron physics. DBχ is associated with the condensation of quark anti-quark pairs in the vacuum, 〈q̄q〉, which is analogous to the condensation of Cooper pairs in the theory of superconductivity 1). As the temperat...

متن کامل

Thermal QCD Sum Rules for σ(600) Meson

In the present work, the temperature dependence of the scalar mesons parameters is investigated in the framework of thermal QCD sum rules. We calculate σ -pole and the non-resonant two-pion continuum contributions to the spectral density. Taking into account additional operators appearing at finite temperature, the thermal QCD sum rules are derived. The temperature dependence of the shifts in t...

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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004