Investigation of the tetraquark candidate a0(980): technical aspects and preliminary results

نویسندگان

  • Abdou Abdel-Rehim
  • Constantia Alexandrou
  • Joshua Berlin
  • Mattia Dalla Brida
  • Mario Gravina
  • Marc Wagner
چکیده

1Computation-based Science and Technology Research Center, The Cyprus Institute, 20 Kavafi Street, 2121 Nicosia, Cyprus 2Department of Physics, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus 3Goethe-Universität Frankfurt am Main, Institut für theoretische Physik, Max-von-Laue-Straße 1, D-60438 Frankfurt am Main, Germany 4School of Mathematics, Trinity College Dublin, Dublin 2, Ireland, & NIC, DESY, Platanenallee 6, 15738 Zeuthen, Germany 5Università della Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende Cosenza, Italy

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

Investigation of light and heavy tetraquark candidates using lattice QCD

We review the status of an ongoing long-term lattice investigation of the spectrum and structure of tetraquark candidates. We focus on the light scalar meson a0(980). First steps regarding the study of a possibly existing ccc̄c̄ tetraquark are also outlined.

متن کامل

Scalar Mesons a0(1450) and σ(600) from Lattice QCD

We study the a0 and σ mesons with the overlap fermion in the chiral regime with the pion mass as low as 182MeV in the quenched approximation. After the ηN ghost states are separated, we find that the a0 mass with qq̄ interpolation field to be almost independent of the quark mass in the region below the strange quark mass. The chirally extrapolated results are consistent with a0(1450) being the u...

متن کامل

Decay of light scalar mesons into vector-photon and into pseudoscalar mesons

The decays of a light scalar meson into a vector meson and a photon (S → V γ) are evaluated in the tetraquark and quarkonium assignments of the scalar states. A link with the radiative decays φ → Sγ is established: experimental results for S → V γ will allow to understand if the direct, quark-loop contribution to φ→ Sγ or the kaon-loop contribution is dominant. Also strong decays S → PP -where ...

متن کامل

Scalar mesons and tetraquarks by means of lattice QCD European Twisted Mass Collaboration (ETMC):

We study the light scalar mesons a0(980) and κ using N f = 2+ 1+ 1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to identify, whether a sizeable tetraquark component is present, we use a large set of operators, including diquarkantidiquark, mesonic molecule and two-meson operators. The inclusion of disconnected diagrams, which are technic...

متن کامل

ar X iv : 1 21 1 . 50 02 v 1 [ he p - la t ] 2 1 N ov 2 01 2 Lattice investigation of the tetraquark candidates a 0 ( 980 ) and κ

It is a long discussed issue whether light scalar mesons have sizeable four-quark components. We present an exploratory study of this question using N f = 2+ 1+ 1 twisted mass lattice QCD. A mixed action approach ignoring disconnected contributions is used to calculate correlator matrices consisting of mesonic molecule, diquark-antidiquark and two-meson interpolating operators with quantum numb...

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 2014