Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Measurement of hadron masses in 2-color finite density QCD

Aug 11, 2022, 12:30 PM
CP1-HSZ/Ground-0.011 - HS1 (CP1-HSZ)

CP1-HSZ/Ground-0.011 - HS1


Oral Presentation QCD at Non-zero Density Non-zero Density


Kotaro Murakami (Yukawa Institute for Theoretical Physics, Kyoto University)


We investigate hadron masses in two-color QCD with $N_f=2$ at low temperature and finite density using lattice simulation. We calculate $\pi$ and $\rho$ meson masses and find the flipping of the spectral ordering of these two mesons near the transition between the hadronic and superfluid phases.
Furthermore, we measure hadron masses with isospin $I=0$ and $J^P = 0^{\pm}$. According to the analysis of the linear sigma model of finite-density two-color QCD with a diquark gap, the meson, diquark, and antidiquark states in such channels are mixed due to the $U(1)_B$ symmetry breaking in the superfluid phase. Our lattice study provides the two-point functions, which are consistent with the above prediction.

Primary authors

Dr Daiki Suenaga (Strangeness Nuclear Physics Laboratory, RIKEN Nishina Center) Kotaro Murakami (Yukawa Institute for Theoretical Physics, Kyoto University) Etsuko Itou (RIKEN) Kei Iida (Department of Mathematics and Physics, Kochi University)

Presentation materials