Speaker
Nikolas Kauer
(RHUL)
Description
A fully differential calculation of the next-to-leading order QCD corrections to the
production of $Z$-boson pairs in association with a hard jet at the Tevatron and LHC
is presented. This process is an important background for Higgs particle and
new physics searches at hadron colliders. We find sizable corrections for cross
sections and differential distributions, particularly at the LHC.
Residual scale uncertainties are typically at the 10\% level and can be further
reduced by applying a veto against the emission of a second hard jet.
Our results confirm that NLO corrections do not simply rescale LO predictions.
[Phys.Lett.B683:154-159,2010]
+
successful comparison with ZZj calculation of Dittmaier, Kallweit, Uwer
[Les Houches Workshop SM and NLO Multileg WG procs., arXiv:1003.1241]
+
additional work:
- additional differential distributions
- comparison of dynamic with fixed scale definitions
- comparison of Kt and SISCone jet algorithms
investigate source of large residual scale uncertainty at LHC:
- contributions of different initial state channels
- independent variation of \mu_R and \mu_F
[in progress]
Author
Nikolas Kauer
(RHUL)
Co-authors
Jennifer Archibald
(IPPP Durham)
Stefan Karg
(RWTH Aachen University)
Tanju Gleisberg
(SLAC)
Thomas Binoth
(University of Edinburgh)
