ResBos input grids for W and Z boson production at the LHC 
in the presence of non-trivial rapidity dependence in the resummed 
transverse momentum distributions.

The grids posted here were computed using the resummation program 
Legacy described in F. Landry et al., Phys.Rev. D67, 073016 (2003).
They were used to generate Figs. 8 and 9 in the paper
hep-ph/0410375, "Transverse momentum resummation at small x for 
the Tevatron and LHC", by Stefan Berge, Pavel Nadolsky, Fredrick Olness, 
and C.-P. Yuan. The model used for the computation of the grids predicts
rapidity-dependent broadening (hardening) of q_T distributions in vector
boson production, the behavior not present in conventional 
resummation models. 

The assumed form of the resummed cross section is representative of
the behavior of q_T distributions observed in small-x 
semi-inclusive DIS data at HERA, and it is compatible 
with Z boson production data in the Tevatron Run-1. Interpretation 
of the results obtained using these grids must factor in
substantial uncertainties that exist in the prediction of the 
x dependence ofq_T distributions. The actual magnitude of 
q_T broadening observed at the LHC can be smaller or larger 
than the prediction of our small-x model. The small-x model 
is most reliable in the central rapidity range at the LHC (|y|<2.5), 
and uncertainties in predictions increase at forward rapidities
(not covered by the present grids).

Compatibility of the grids: ResBos and ResBos-A v.1.0.0

The naming conventions are as follows:
c221_wp_lhc_ct6m_smx.grd.bz2
 |   |   |     |   |     |  |  
 |   |	 |     |   |     |  |--------------  bzip2'ed ResBos grid
 |   |	 |     |   |-----------------------  smx: nonperturbative Sudakov
 |   |   |     |                             function with small-x
 |   |   |     |                             broadening
 |   |   |     |---------------------------  CTEQ6M PDF set
 |   |   -----------------------------------  LHC
 |   ---------------------------------------  wp/wm/z0: W+, W-, Z0
 ---: c221 -- CSS piece with A,B,C functions evaluated up to orders 2,2, and 1
      or y -- Y piece evaluated up to NLO