Study for the pentaquark potential in SU(3) lattice QCD.

نویسندگان

  • Fumiko Okiharu
  • Hideo Suganuma
  • Toru T Takahashi
چکیده

We perform the first study of the static pentaquark (5Q) potential V(5Q) in SU(3) quenched lattice QCD with 16(3) x 32 and beta = 6.0. From the 5Q Wilson loop, V(5Q) is calculated in a gauge-invariant manner, with the smearing method to enhance the ground-state component. V(5Q) is well described by the OGE-plus-multi-Y ansatz: a sum of the one-gluon-exchange (OGE) Coulomb term and the multi-Y-type linear term proportional to the minimal total length of the flux tube linking the five quarks. Comparing with QQ and3Q potentials, we find a universality of the string tension, sigma(QQ) approximately sigma(3Q) approximately sigma(5Q), and the OGE result for Coulomb coefficients.

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

Pentaquarks: Status and Perspectives for Lattice Calculations

The quantum chromo-dynamics (QCD) may not preclude the presence of the multi-quark hadrons such as tetraquark (qqq̄q̄), pentaquark (qqqqq̄), dibaryon (qqqqqq) and so on, because of the color confinement. Especially, we are let to be interested in exotic multi-quark hadrons, which should have exotic quantum numbers. Now, let us address ourself to the pentaquark state. Consider the SU(3) flavor case...

متن کامل

Spin-32 Pentaquark Resonance Signature in Lattice QCD

X iv :h ep -l at /0 50 40 15 v 2 7 O ct 2 00 5 ADP-05-09/T619 DESY 05-060 Spin-32 Pentaquark Resonance Signature in Lattice QCD B. G. Lasscock, D. B. Leinweber, W. Melnitchouk, A. W. Thomas, 2 A. G. Williams, 2 R. D. Young, 2 and J. M. Zanotti 3 1 Special Research Centre for the Subatomic Structure of Matter, and Department of Physics, University of Adelaide, Adelaide SA 5005, Australia Jeffers...

متن کامل

Inter-quark Potentials in Baryons and Multi-quark Systems in Qcd

We perform the first studies of various inter-quark potentials in SU(3)c lattice QCD. From the accurate lattice calculation for more than 300 different patterns of three-quark (3Q) systems, we find that the static 3Q potential V3Q is well described by Y-Ansatz, i.e., the Coulomb plus Y-type linear potential. Quark confinement mechanism in baryons is also investigated in maximally-Abelian projec...

متن کامل

Absence of evidence for pentaquarks on the lattice

We study the question of whether or not QCD predicts a pentaquark state Θ. We use the improved, fixed point lattice QCD action which has very little sensitivity to the lattice spacing and also allows us to reach light quark masses. We use the correlation matrix method to identify the ground and excited states for a given choice of quantum numbers. In the quenched approximation where dynamical q...

متن کامل

Pentaquark baryons in quenched lattice QCD with exact chiral symmetry

We investigate the mass spectrum of pentaquark baryons in quenched lattice QCD with exact chiral symmetry. Using interpolating operators based on the diquark-diquark-antiquark picture in the Jaffe-Wilzcek model, we measure time correlation functions for 70 gauge configurations generated with Wilson gauge action at β = 6.1 on the 203 × 40 lattice, and extract the masses of even and odd parity st...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  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:
  • Physical review letters

دوره 94 19  شماره 

صفحات  -

تاریخ انتشار 2005