Model Unspecific Search for New Physics with b-Hadrons in CMS

Since the end of 2009, the LHC collider at CERN is accelerating protons and the large multi purpose detector CMS is taking collision data. The purpose of CMS is to perform precision measurements of Standard Model physics as well as searching for new physics, both at energy scales that could not be reached by collider experiments before. Many theories of how new physics at high energies might look like have been proposed. Together with possible models, that nobody has thought of yet, these theories of new physics result in an almost infinite number of possible experimental signatures, that should be investigated within the data. This cannot possibly be achieved by dedicated analyses, searching for specific signals only. Model Unspecific Search in CMS (MUSiC) provides a complementary approach by generally scanning the data for deviations from the Standard Model, without restricting to a specific theory or signal. To achieve this, event classes are investigated, containing events with a similar object content. Taking into account statistical and systematic uncertainties, potential deviations are analysed and their significance is determined. This work presents the MUSiC framework (which was developed at RWTH Aachen Univer- sity) as well as an approach to implement the identification of b-hadrons into this framework. This approach has been performed, as b-hadrons play an important role in several precision measurements of the Standard Model as well as in many theories of new physics at high energies. Test scenarios with b-hadrons are presented, in order to determine the benefit of b-hadron identification with respect to the Model Unspecific Search in CMS.