Challenges of Lattice Calculation of Scalar Mesons

نویسنده

  • Keh-Fei Liu
چکیده

I review a proposed pattern of the light scalar mesons with qq̄ mesons and glueball above 1 GeV and terraquark mesoniums below 1 GeV. Several challenges and caveats of calculating these light scalar mesons with dynamical fermions are discussed.

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

Insight into the Scalar Mesons from a Lattice Calculation

We study the possibility that the light scalar mesons are q̄q states rather than q̄q. We perform a lattice QCD calculation of pseudoscalar meson scattering amplitudes, ignoring quark loops and quark annihilation, and find indications that for sufficiently heavy quarks there is a stable four-quark bound state with J = 0 and non-exotic flavor quantum numbers.

متن کامل

Scalar Mesons as q̄2q2? Insight from the Lattice

I describe some insight obtained from a lattice calculation on the possibility that the light scalar mesons are q̄2q2 states rather than q̄q. First I review some general features of q̄2q2 states in QCD inspired quark models. Then I describe a lattice QCD calculation of pseudoscalar meson scattering amplitudes, ignoring quark loops and quark annihilation, which finds indications that for sufficient...

متن کامل

Scalar Mesons on the Lattice Using Stochastic Sources on GPU Architecture

We describe our studies of multi-pion correlation functions computed using stochastic propagators in quenched lattice QCD, harnessing GPUs for acceleration. We find that projecting onto momentum states for the pions becomes enormously expensive and has a poor scaling with the linear extent of the lattice. We will use Lüscher’s method and look for the σ in the π+π−→ π+π− channel. The result is t...

متن کامل

Glueball matrix elements: a lattice calculation and applications

We compute the matrix elements of the energy-momentum tensor between glueball states and the vacuum in SU(3) lattice gauge theory and extrapolate them to the continuum. These matrix elements may play an important phenomenological role in identifying glue-rich mesons. Based on a relation derived long ago by the ITEP group for J/ψ radiative decays, the scalar matrix element leads to a branching r...

متن کامل

Scalar mesons on the Lattice

The simulations of the light scalar mesons on the lattice are presented at the introductory level. The methods for determining the scalar meson masses are described. The problems related to some of these methods are presented and their solutions discussed.

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 2008