W and Z boson Productions in CMS at LHC startup

TL;DR

This paper discusses the potential for measuring W and Z boson production at the LHC, focusing on jet multiplicity and transverse momentum distributions, with implications for understanding backgrounds in new physics searches.

Contribution

It introduces the expected measurements of W and Z boson production and their associated jets at LHC startup, highlighting the potential to surpass Tevatron data in key distributions.

Findings

Anticipated early LHC data will exceed Tevatron in jet multiplicity and P_T range.

Ratios of W+jets to Z+jets distributions can be compared to NLO Monte Carlo predictions.

Results will improve understanding of backgrounds for new physics searches.

Abstract

We report on potential for measurement of W and Z boson production, as well as the production in association with jets. Of particular interest are jet multiplicity and $P_{\rm T}$ distributions. The 10 to $100 {\rm pb}^{-1}$ 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 $P_{\rm T}$ 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.