Update on quarkonium spectroscopy and alpha(strong) from NRQCD - INSPIRE

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Update on quarkonium spectroscopy and alpha(strong) from NRQCD

C.T.H. Davies
(
- Glasgow U.
)
,
A.J. Lidsey
(
- Glasgow U.
)
,
P. McCallum
(
- Glasgow U.
)
,
K. Hornbostel
(
- Southern Methodist U.
)
,
G.P. Lepage
(
- Cornell U., LNS
)

Jul, 1995

8 pages

Part of Lattice '95. Proceedings, International Symposium on Lattice Field Theory, Melbourne, Australia, July 11-15, 1995

Published in:

Nucl.Phys.B Proc.Suppl. 47 (1996) 409-416

Contribution to:

International Symposium on Lattice Field Theory (Lattice '95)

e-Print:

hep-lat/9510006 [hep-lat]

DOI:

10.1016/0920-5632(96)00084-9

View in:

ADS Abstract Service

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Abstract:

NRQCD results for Upsilon and Charmonium using both dynamical and quenched configurations are presented. We investigate dependence on the light dynamical quark mass. Preliminary dynamical (

n_f = 2

) Charmonium data are combined with quenched results to extract the strong coupling constant

\alpha_P~{(n_f)}

for the physical number of light dynamical quarks,

n_f = 3

. Good agreement is found with calculations based on the Upsilon system. We show that a discrepancy in

\alpha_P~{(n_f=0)}

, found between the Upsilon and Charmonium systems in the quenched theory, disappears upon extrapolating to the physical number of flavors. Results for the strong coupling constant

\alpha_{\overline{MS}}

are presented and sources of systematic error investigated.

Note:

8 pages of tex with 2 uuencoded postscript figures. Contribution to LAT95

talk
lattice field theory
quantum chromodynamics: nonrelativistic
charmonium
quarkonium: hadron spectroscopy
upsilon mesons: mass spectrum
mass spectrum: upsilon mesons
approximation: quenching
strong interaction: coupling constant
coupling constant: strong interaction

References(14)

Figures(0)

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