Speaker
Mr
Ryutaro Fukuda
(University of Tokyo, RIKEN BNL Research Center)
Description
In recent years, exotic hadrons called X, Y, Z
which cannot be explained by the quark model have been found one after another.
For example, the tetraquark state, which is one of the typical scenarios to interpret the exotic state, is based on the existence of a diquark state.
The discovery of a pentaquark state at CERN in July last year
also makes a diquark state even more important.
It is well known that an attraction between two quarks
can be enhanced in the color anti-triplet, flavor anti-symmetric,
spin singlet, positive parity channel and this diquark is called good diquark.
Our main subject is to check
if a lattice QCD simulation with 2 flavor Wilson fermions actually supports this statement.
For this objective,
we calculate diquark mass diference between good diquark and other diquarks
and also analyze density distribution of diquarks
through calculation of density-density correlators.
Primary author
Mr
Ryutaro Fukuda
(University of Tokyo, RIKEN BNL Research Center)
Co-author
Dr
Philippe de Forcrand
(ETH Zurich, CERN)
