1-+ Hybrid Masses (GeV)

udg

date ref method mass notes
1996 [1] Rel. (clover) 1.88(20) 1
1996 [2] Rel. (Wilson) 1.97(9)(30) 2
1998 [3] Rel. (Wilson) 1.90(20) 3
1998 [4] Rel. (clover) 2.11(10)(?) 2
2002 [13] aniso. 2.013(26)(71) -
2002 [14] improved
Kogut-Wilson		 2.033(70) 4
2002 [14] improved
Kogut-Wilson		 1.854(65) 5

Notes

1. a model was used to extrapolate to mq = 0.

2. extrapolation from several values of a mq; a=0.075 fm.

3. Nf=2 dynamical quarks, extrapolation from several values of a mq; a= 0.086 fm.

4. r1 = 0.34 fm

5. sqrt(sigma) = 440 MeV

ssg

date ref method mass notes
1996 [1] rel (clover) 2.00(20) 1
1996 [2] rel (Wilson) 2.17(8)(20) 2

Notes

1. a=0.095 fm.

2. a=0.075 fm.

ccg

date ref method mass difference notes
1990 [5] static 0.94(3)(?) .
1996 [2] rel (Wilson) 1.34(8)(20) .
1998 [4] rel (clover) 1.22(15)(?) .
1999 [6] N. Rel (anisotropic) 1.323(13) .
2002 [13] anisotropic 1.302(37)(99) .

bbg

date ref method mass difference notes
1990 [5] static 1.11(3)(?) .
1993 [7] Non Rel 0.8(?)(?) .
1997 [8] Non Rel. 1.68(10) .
1997 [8] Non Rel 1.40(14) 1
1997 [9] Non Rel 1.14(21) .
1997 [10] static 1.3 .
1999 [6] Non Rel (anisotropic) 1.542(8) .
1999 [11] static + Non Rel (anisotropic) 1.49(2)(5) .
2001 [12] RG improved, 2 dyn quarks10.977(61)(62) GeV(mass)

Notes

1. Value with the lattice spacing determined differently.

References

1. P. Lacock et al. Phys. Rev. D54 (1996) 6997; Phys. Lett. 401B (1997) 308.

2. C. Bernard et al. (MILC), Nucl. Phys. (Proc. Suppl) 53 (1997) 228; Phys. Rev. D56 (1997) 7039.

3. P. Lacock and K. Schilling, Nucl. Phys. (Proc. Suppl) 73 (1999) 261.

4. C. Bernard et al. (MILC), Nucl. Phys. (Proc. Suppl) 73 (1999) 264.

5. S. Perantonis and C. Michael, Nucl. Phys. B347 (1990) 854.

6. T. Manke et al. (CP-PACS), Phys. Rev. Lett. 82 (1999) 4396.

7. S.M. Catterall, F.R. Devlin, I.T. Drummond, and R.R. Horgan, Phys. Lett. 300B (1993) 393.

8. T. Manke, I.T. Drummond, R.R. Horgan, and H.P. Shanahan, Phys. Rev. D57 (1998) 3829; Nucl. Phys. (Proc. Suppl) 63 (1998) 332.

9. S. Collins, C. Davies, and G. Bali, Nucl. Phys. (Proc. Suppl) 63 (1998) 335.

10. K. Juge, C.J. Morningstar, and J. Kuti, Nucl. Phys. (Proc. Suppl) 63 (1998) 326.

11. K. Juge, C.J. Morningstar, and J. Kuti, Phys. Rev. Lett. 82 (1999) 4400.

12. CP-PACS , hep-lat/0103015

13. X.-Q. Luo and Z.-H. Mei, hep-lat/0209049

14. C. Bernard et al., hep-lat/0209097