Full QCD light hadron spectrum and quark masses: Final results from CP-PACS

CP-PACS Collaboration

Ali Khan A

Aoki S

Boyd G

Burkhalter R

Ejiri S

Fukugita M

Hashimoto S

Ishizuka N

Iwasaki Y

Kanaya K

Kaneko T

Kuramashi Y

Manke T

Nagai K-I

Okawa Masanori

Shanahan H. P.

Ukawa A

Yoshié T

Nuclear Physics B Proceedings Supplements

We present the final results of the CP-PACS calculation of the light hadron spectrum and quark masses withtwo flavors of dynamical quarks. Simulations are made with a renormalization-group improved gauge action anda mean-field improved clover quark action for sea quark masses corresponding to mPS/mV 0.8–0.6 and thelattice spacing a = 0.22–0.11 fm. For the meson spectrum in the continuum limit a clearly improved agreementwith experiment is observed compared to the quenched case, demonstrating the importance of sea quark eects.For light quark masses we obtain mMSud (2GeV ) = 3.44+0.14-0.22 MeV and mMSs (2GeV ) = 88+4-6 MeV (K-input) andmMSs (2GeV ) = 90+5-11 MeV (-input), which are reduced by about 25% compared to the values in quenched QCD.

Physics [ 420 ]

eng

Elsevier Science B.V.

Copyright (c) 2001 Elsevier Science B.V.

[ISSN] 0920-5632

[DOI] http://dx.doi.org/10.1016/S0920-5632(01)00961-6 isVersionOf