32nd International Symposium on Lattice Field Theory (Lattice 2014)

2+1 flavor measurement for η and η′ masses using domain wall fermion

24 Jun 2014, 18:10

2h

Low library

Board: 41

Poster Hadron Spectroscopy and Interactions Poster session

Speaker

Dr Hyung-Jin Kim (Brookhaven National Laboratory)

Description

The $\eta -{\eta }^{\prime }$ mass splitting coming from anomalous effect on U(1) axial currents has been a historical issue. % The QCD gauge field topology with instanton can explain this problem and show consistent result with experimental mass of ${\eta }^{\prime }$. % Based on the $2+1$ flavor lattice QCD simulation, previous $\eta -{\eta }^{\prime }$ masses study shows about 15\% level of accuracy. % With the advanced computational capability of GPU, we can process more bigger and finer lattice data for higher precision measurement. % In this work, we will show our preliminary $\eta -{\eta }^{\prime }$ mass result calculated on ${24}^3\times 64$ and ${32}^3\times 64$ Iwasaki gauge lattices corresponding to $a^{-1}=1.73$GeV.