scholarly journals Lattice calculation of quarkonium decay matrix elements

1996 ◽  
Author(s):  
G.T. Bodwin ◽  
D.K. Sinclair ◽  
S. Kim
2012 ◽  
Vol 20 ◽  
pp. 153-161
Author(s):  
M. ENGELHARDT ◽  
B. MUSCH ◽  
P. HÄGLER ◽  
J. NEGELE ◽  
A. SCHÄFER

Starting from a definition of transverse momentum-dependent parton distributions for semi-inclusive deep inelastic scattering and the Drell-Yan process, given in terms of matrix elements of a quark bilocal operator containing a staple-shaped Wilson connection, a scheme to determine such observables in lattice QCD is developed and explored. Parametrizing the aforementioned matrix elements in terms of invariant amplitudes permits a simple transformation of the problem to a Lorentz frame suited for the lattice calculation. Results for the Sivers and Boer-Mulders transverse momentum shifts are presented, focusing in particular on their dependence on the staple extent and the Collins-Soper evolution parameter.


1991 ◽  
Vol 20 ◽  
pp. 189-193 ◽  
Author(s):  
Yigao Liang ◽  
Keh-Fei Liu ◽  
Bing An Li ◽  
Kenzo Ishikawa

1985 ◽  
Vol 55 (25) ◽  
pp. 2770-2773 ◽  
Author(s):  
C. Bernard ◽  
T. Draper ◽  
G. Hockney ◽  
A. M. Rushton ◽  
A. Soni

1993 ◽  
Vol 307 (3-4) ◽  
pp. 375-382 ◽  
Author(s):  
Y. Liang ◽  
K.F. Liu ◽  
B.A. Li ◽  
S.J. Dong ◽  
K. Ishikawa

1997 ◽  
Vol 12 (22) ◽  
pp. 4019-4028 ◽  
Author(s):  
G. T. Bodwin ◽  
D. K. Sinclair ◽  
S. Kim

We calculate the NRQCD matrix elements for the decays of the lowest-lying S- and P-wave states of charmonium and bottomonium in quenched lattice QCD. We also compute the one-loop relations between the lattice and continuum matrix elements.


Sign in / Sign up

Export Citation Format

Share Document