Speaker
Vaibhav Pandey
(Indian Institute of Technology Guwahati)
Description
We perform the threshold resummation for massive vector boson pair production processes ($ZZ$ and $W^{+}W^{-}$) in hadron collisions to Next to Next Leading Log accuracy. The resummed cross-sections are then matched with NNLO fixed order results, which are obtained using the MATRIX code. We present our results for the invariant mass distribution to NNLO+NNLL accuracy in QCD for the current LHC energies. The NNLL contributions enhance the cross section by a few per cent in the high invariant mass regions. In these regions, the uncertainties due to unphysical scales ($\mu_{R}$ and $\mu_{F}$) in the fixed-order results, 4.6\% for ZZ and 4.2\% for WW (at $Q=1.3$ TeV) get reduced to
3.2\% and 3.0\%, after resummation.
Authors
Chinmoy Dey
(Indian Institute of Technology Guwahati)
Dr
Kumar Meduri Chakravartula
(IIT Guwahati)
Pulak Banerjee
(INFN Cosenza)
Vaibhav Pandey
(Indian Institute of Technology Guwahati)
