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Strategy
The group is now heavily involved in the analysis of first data data taking. Its' idesigned to complement its hardware responsibilities and builds key
competences for future physics exploitation.
The target of the groups interests has is the study of the W and Z bosons with small samples of data. This pragmatic approach recognizes the realities of
performing early analyses at the LHC and the desire to get large samples of high quality muon tracks to understand the VELO performance. There is also a well defined physics output. Studies of the W± distributions will explore new kinematic regions of the proton structure with high theoretical and experimental precision. The studies of Z production will a probe for NP and will be extended to a study of Drell-Yan production at lower energies. Substantial theoretical interest has been shown in this work and the studies have been shown at many conferences and workshops. The group is collaborating closely with theorists at IPPP, UCL and Cambridge on these studies. In recognition of this effort a group member convenes the LHCb Electro-Weak group.
Group members involved in the LHCb tracking are developing more complex hadronic analyses (Bs®DsDs) that will more fully
exploit the performance and understanding of the VELO. The group expects its group members will provide the definitive expertise on vertex reconstruction that underpin LHCb analyses.
In the long term, 2011 onwards, the group wishes to search for new physics using a calibrated and understood detector
more details for 2010 substantial effort will go to the first physics W/Z programme.
By early 2010 we expect aim to reconstruct a Z®mm peak and to make first measurement of W+/W- production in new kinematic regions (probing x at ~10-6). This will probe possible NP signals
within the first year. In 2010 we expect the first detailed measurements of these quantities to be made; this will enable cross-checks of pdfs with ATLAS and CMS. The Z analysis will be extended to lower and higher
masses enabling detailed searches for new Z like resonance and a study of Drell-Yan in the forward direction at LHC. The group, in collaboration with UCD, has proposed a novel way of determining the absolute
luminosity at LHCb using low mass Drell-Yan pairs. In conjunction with staff at UCD (and now at Zurich) the group will undertake to provide this luminosity with a precision of about 1% from 2010 onwards. During this
period we expect to continue to lead the electro-weak working group.
For 2010 we will continue studying the Bs®DsDs. As the data sets increase in size not only will the knowledge of the tracking
and vertexing errors improve but also, as discussed above, will the need for the provision of precise correction factors for VELO data.
In 2010 our hadronic analysis will be extended to include a lifetime measurement, in particular for the Bs. This will use the huge statistics and
precision vertex detector available at LHCb together with the cluster correction factors for which the group will be the experts. This will build on our previous expertise from LEP and CDF on B-hadron lifetimes and
tracking.
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