I will discuss the various experimental aspects of physics with b-quarks. In particular, I will address the key experiments, compare their main differences, their benefits and possible shortcomings. I will briefly review the consistencies of recent data with the description via the quark-flavour mixing scheme (CKM matrix). One key issue in flavour physics is the search for New Physics possibly showing up in rare b-quark decays, in particular the ultra-rare purely leptonic decays B(s) →μ+μ-, and the semileptonic decays b→s ℓ+ℓ– (ℓ = e, μ). Thereby, I will concentrate on presently observed tensions with respect to the Standard Model predictions, so-called anomalies, as are observed by the LHCb experiment using measurements of the angular distribution in specific decays and the decay branching fractions.
Bio Monica Pepe-Altarelli:
Monica Pepe Altarelli joined the Rutherford Laboratory as Research Associate in the NA32 experiment on hadronic production of charmed particles at the CERN SPS accelerator. In 1987 she joined CERN as research fellow in the ALEPH experiment at the LEP accelerator; she was one of the principal authors of the first measurement of the number of light neutrino species, one of the main results of LEP, in a small group led by Jack Steinberger. She continued to work with the ALEPH experiment as research physicist at the “Laboratori Nazionali di Frascati” of the INFN, concentrating her research on precision tests of the Standard Model in the electroweak physics sector. She became CERN staff in the year 2000 and joined the LHCb experiment at the LHC, first as leader of the CERN team and then as deputy spokesperson of the LHCb collaboration. Her current main scientific interest is the search for New Physics beyond the Standard Model through the study of very rare decays of charm and beauty-flavoured hadrons and precision measurements of CP-violating observables with the LHCb detector.