Investigation of light and heavy tetraquark candidates using lattice QCD

نویسندگان

  • Marc Wagner
  • Abdou Abdel-Rehim
  • Constantia Alexandrou
  • Mattia Dalla Brida
  • Mario Gravina
  • Giannis Koutsou
  • Luigi Scorzato
  • Carsten Urbach
چکیده

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.

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

Including heavy spin effects in the prediction of a b̄b̄ud tetraquark with lattice QCD potentials

We investigate spin effects in four-quark systems consisting of two heavy anti-bottom quarks and two light up/down quarks. To this end we use the Born-Oppenheimer approximation. We utilize potentials of two static antiquarks in the presence of two quarks of finite mass computed via lattice QCD and solve a coupled-channel Schrödinger equation for the anti-bottom-anti-bottom separation. Without t...

متن کامل

Lattice QCD signal for a bottom-bottom tetraquark

Utilizing lattice QCD results for the potential of two static antiquarks and two dynamical quarks as well as quark model techniques for the dynamics of two heavy antiquarks in a cloud of two light quarks, we are provided with an accurate framework for the study of possibly existing heavy-heavylight-light tetraquarks. Among the possible quantum numbers of such a system, we find binding in only o...

متن کامل

A lattice study of light scalar tetraquarks

The observed mass pattern of scalar resonances below 1 GeV gives preference to the tetraquark assignment over the conventional q̄q assignment for these states. We present a search for tetraquarks with isospins 0, 1/2, 1 in lattice QCD, where the isospin channels 1/2 and 1 have not been studied before. We determine three energy levels in each isospin channel using the variational method. The scat...

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

Selection rules for hadronic transitions of XYZ mesons.

Many of the XYZ mesons discovered in the last decade can be identified as bound states of a heavy quark and antiquark in Born-Oppenheimer (BO) potentials defined by the energy of gluon and light-quark fields in the presence of static color sources. The mesons include quarkonium hybrids, which are bound states in excited flavor-singlet BO potentials, and quarkonium tetraquarks, which are bound s...

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 2013