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14 december 2018

Closed FOM programme

Number 23.
Title Physics with b-quarks: LHCb (LHCb)
Executive organisational unit FOM-Nikhef + BUW
Programme management Prof.dr. M.H.M. Merk
Duration 1999-2014
Cost estimate M€ 31.7

To search for new particles and interactions that affect the observed matter-antimatter asymmetry in Nature, by making precision measurements of B-meson decays.

Background, relevance and implementation
The LHC is a prolific source of B-mesons, and therefore strong interest has been expressed in measuring precisely the CP violation in B decay and to determine elements of the Cabibbo - Kobayashi - Maskawa (CKM) matrix.
Precision measurements of these CP asymmetries, as well as measurements of branching fraction of rare B-decays are sensitive tests to the presence of interactions beyond the Standard Model.

The LHCb experiment at CERN will carry out an extensive study of CP violation in many complementary B decays. The detector and trigger are optimised for high acceptance in all relevant decay channels. Also minimization and control of systematic effects play an important role in the design of the detector. CERN has approved the LHCb experiment in 1998 and the Memorandum of Understanding has been signed. The LHCb collaboration presently consists of about 760 participants.

In addition to the large enterprise in the LHCb experiment, FOM-Nikhef  has been active within the precursor experiments HERA-B and BaBar. These activities served as an excellent training ground for experimentation with LHCb, and have been ended. 

The contributions of the FOM-Nikhef group in LHCb focus on the detection of charged particles in the final state of B-decays. In particular FOM-Nikhef contributes with the construc­tion and operation of the Vertex Detector and the Outer Tracker detector as well as with the development of software for online and offline track reconstruction, triggering, event selection and physics analysis.

Partner in this programme is the VU.

The final evaluation of this programme will consist of a self-evaluation initiated by the programme leader and is foreseen for 2015.

Please find a research highlight that was achieved in 2013 within this FOM programme here.