Production of W and Z bosons accompanied by jets at LHC startup

TL;DR

This paper discusses the potential to measure W and Z boson production with jets at the LHC, focusing on jet multiplicity and transverse momentum distributions, which can surpass Tevatron data early in LHC operation.

Contribution

It highlights the feasibility of early LHC measurements of W/Z+jets, emphasizing the importance of these processes for background understanding and new physics searches.

Findings

LHC startup datasets can provide new insights into jet multiplicity and Pt distributions.

Comparison of W+jets and Z+jets ratios with NLO Monte Carlo generators is crucial.

Early measurements will improve background modeling for new physics searches.

Abstract

We report on potential for measurement of W and Z boson production accompanied by jets at the CMS experiment. Of particular interest are jet multiplicity and Pt distributions. The 10/pb to 100/pb datasets expected in the startup year of operation of LHC are likely to already provide information beyond the reach of the Tevatron collider both in jet multiplicity and Pt range. We are especially interested in understanding the ratios of W+jets to Z+jets distributions by comparing them to next-to-leading order Monte Carlo generators, as these processes present a formidable background for searches of new physics phenomena.