Diquark masses from lattice QCD

We present first results for diquark correlation functions calculated in Landau gauge on the lattice. Masses have been extracted from the long distance behaviour of these correlation functions. We find that the ordering of diquark masses with spin 0 and 1 states in colour anti-triplet and sextet channels is in accordance with instanton motivated interaction models. Although we find evidence for an attractive interaction in colour anti-triplet states with a splitting between spin 0 and spin 1 diquarks that can account for the mass splitting between the nucleon and the delta, there is no evidence for a deeply bound diquark state.

gauge field theory: SU(3)
fermion: lattice field theory
approximation: quenching
correlation function: (quark diquark)
Landau gauge
mass: diquark
instanton
color: multiplet
spinless
spin: 1

References(19)

Figures(0)

Diquark Clusters in the Quark Gluon Plasma

- Phys.Rev.D 38 (1988) 360
•
DOI:
- 10.1103/PhysRevD.38.360

Diquark Bose condensates in high density matter and instantons

R. Rapp
(
- SUNY, Stony Brook
)
,
Thomas Schäfer
(
- Washington U., Seattle
)
,
Edward V. Shuryak
(
- SUNY, Stony Brook
)
,
M. Velkovsky
(
- Brookhaven
)

- Phys.Rev.Lett. 81 (1998) 53-56
•
e-Print:
- hep-ph/9711396
•
DOI:
- 10.1103/PhysRevLett.81.53

QCD at finite baryon density: Nucleon droplets and color superconductivity

- Phys.Lett.B 422 (1998) 247-256
•
e-Print:
- hep-ph/9711395
•
DOI:
- 10.1016/S0370-2693(98)00051-3

Nuclear matter with a Bose condensate of dibaryons in relativistic mean field theory

Amand Faessler
(
- Tubingen U.
)
,
A.J. Buchmann
(
- Tubingen U.
)
,
M.I. Krivoruchenko
(
- Tubingen U. and
- Moscow, ITEP
)
,
B.V. Martemyanov
(
- Moscow, ITEP
)

- Phys.Lett.B 391 (1997) 255-260
•
e-Print:
- nucl-th/9611020
•
DOI:
- 10.1016/S0370-2693(96)01482-7

Dibaryons in nuclear matter

Amand Faessler
(
- Tubingen U.
)
,
A.J. Buchmann
(
- Tubingen U.
)
,
M.I. Krivoruchenko
(
- Tubingen U. and
- Moscow, ITEP
)
,
B.V. Martemyanov
(
- Moscow, ITEP
)

- J.Phys.G 24 (1998) 791-820
•
e-Print:
- nucl-th/9709030
•
DOI:
- 10.1088/0954-3899/24/4/011

Hadron Masses in a Gauge Theory

- Phys.Rev.D 12 (1975) 147-162,
- In *Lichtenberg, D. B. ( Ed.), Rosen, S. P. ( Ed.): Developments In The Quark Theory Of Hadrons, Vol.*, 273-288. ( Phys. Rev. D12 ( 1975) 147-162)
•
DOI:
- 10.1103/PhysRevD.12.147

The Spectrum of the nucleons and the strange hyperons and chiral dynamics

L.Ya. Glozman
(
- Graz U. and
- Inst. Power Eng. Almaty
)
,
D.O. Riska
(
- Washington U., Seattle and
- Helsinki U.
)

- Phys.Rept. 268 (1996) 263-303
•
e-Print:
- hep-ph/9505422
•
DOI:
- 10.1016/0370-1573(95)00062-3

Computation of the Quantum Effects Due to a Four-Dimensional Pseudoparticle

Gerard 't Hooft
(
- Harvard U.
)

- Phys.Rev.D 14 (1976) 3432-3450,
- Phys.Rev.D 18 (1978) 2199 (erratum),
•
DOI:
- 10.1103/PhysRevD.14.3432

Instantons and Baryon Mass Splittings

- Phys.Lett.B 218 (1989) 72-74
•
DOI:
- 10.1016/0370-2693(89)90477-2

Baryonic correlators in the random instanton vacuum

Thomas Schäfer
(
- SUNY, Stony Brook
)
,
Edward V. Shuryak
(
- SUNY, Stony Brook
)
,
J.J.M. Verbaarschot
(
- SUNY, Stony Brook
)

- Nucl.Phys.B 412 (1994) 143-168
•
e-Print:
- hep-ph/9306220
•
DOI:
- 10.1016/0550-3213(94)90497-9

Lattice Quark Propagator in Fixed Gauges

Claude W. Bernard
(
- Santa Barbara, KITP
)
,
Daniel Murphy
(
- Arizona U.
)
,
Amarjit Soni
(
- Brookhaven
)
,
Kenton K. Yee
(
- UCLA
)

- Nucl.Phys.B Proc.Suppl. 17 (1990) 593-598,
- Capri,Lattice 1989:593-598
•
DOI:
- 10.1016/0920-5632(90)90321-K

A Lattice study of the quark propagator and vertex function

UKQCD

Collaboration

•

Jon Ivar Skullerud
(
- Edinburgh U.
)

for the collaboration.

- Nucl.Phys.B Proc.Suppl. 42 (1995) 364-366
•
e-Print:
- hep-lat/9412014
•
DOI:
- 10.1016/0920-5632(95)00251-4

The Gluon Propagator at Finite Temperature

J.E. Mandula
(
- Dept. of Energy, Wash., D.C. and
- Washington U., St. Louis
)
,
M. Ogilvie
(
- Washington U., St. Louis and
- Brookhaven
)

- Phys.Lett.B 201 (1988) 117-122
•
DOI:
- 10.1016/0370-2693(88)90091-3

Efficient gauge fixing via overrelaxation

- Phys.Lett.B 248 (1990) 156-158
•
DOI:
- 10.1016/0370-2693(90)90031-Z

The Gluon propagator at high temperature

Urs M. Heller
(
- Florida State U., SCRI
)
,
F. Karsch
(
- Bielefeld U.
)
,
J. Rank
(
- Bielefeld U.
)

- Phys.Lett.B 355 (1995) 511-517
•
e-Print:
- hep-lat/9505016
•
DOI:
- 10.1016/0370-2693(95)00748-A

Fourier Acceleration in Lattice Gauge Theories. 1. Landau Gauge Fixing

C.T.H. Davies
(
- Glasgow U.
)
,
G.G. Batrouni
(
- Boston U.
)
,
G.R. Katz
(
- Naval Research Lab, Wash., D.C.
)
,
Andreas S. Kronfeld
(
- DESY
)
,
G.P. Lepage
(
- Cornell U., LNS
)

et al.

- Phys.Rev.D 37 (1988) 1581
•
DOI:
- 10.1103/PhysRevD.37.1581

Improved Continuum Limit Lattice Action for QCD with Wilson Fermions

B. Sheikholeslami
(
- Hamburg U.
)
,
R. Wohlert
(
- Hamburg U.
)

- Nucl.Phys.B 259 (1985) 572,
- Nucl. Phys. B259 ( 1985) 572-596 and Hamburg Desy - DESY 85-024 (85,REC.MAR.) 26p
•
DOI:
- 10.1016/0550-3213(85)90002-1

Lattice QCD spectroscopy: progress and prospects

Thomas A. DeGrand
(
- Colorado U.
)

- Nucl.Phys.B Proc.Suppl. 20 (1991) 353-361,
- In *Tallahassee 1990, Proceedings, Lattice 90* 353-361 and Colorado Univ. Boulder - COLO-HEP-238 (90/10,rec.Jan.91) 9 p
•
DOI:
- 10.1016/0920-5632(91)90941-7

QCD spectroscopy

Don Weingarten
(
- IBM Watson Res. Ctr.
)

- Nucl.Phys.B Proc.Suppl. 34 (1994) 29-46,
- Dallas Lattice 1993:0029-46
•
e-Print:
- hep-lat/9401021
•
DOI:
- 10.1016/0920-5632(94)90318-2