Editing LHCb experiment (section)

== Physics goals ==
The experiment has wide physics program covering many important aspects of heavy flavour (both [[beauty (quantum number)|beauty]] and charm), electroweak and [[quantum chromodynamics]] (QCD) physics. Six key measurements have been identified involving B mesons. These are described in a roadmap document<ref>
{{cite arXiv
 |author=B. Adeva et al (LHCb collaboration)
 |year=2009
 |title=Roadmap for selected key measurements of LHCb
 |eprint=0912.4179
 |class=hep-ex
}}</ref> that formed the core physics programme for the first high energy LHC running in 2010–2012. They include:
* Measuring the branching ratio of the rare B<sub>s</sub> → μ<sup>+</sup> μ<sup>−</sup> decay.
* Measuring the forward-backward asymmetry of the muon pair in the [[flavour-changing neutral current]] B<sub>d</sub> → K<sup>*</sup> μ<sup>+</sup> μ<sup>−</sup> decay. Such a flavour changing neutral current cannot occur at tree-level in the [[Standard Model]] of Particle Physics, and only occurs through box and loop Feynman diagrams; properties of the decay can be strongly modified by new physics.
* Measuring the [[CP violation|CP violating]] phase in the decay B<sub>s</sub> → J/ψ φ, caused by interference between the decays with and without [[B–Bbar oscillation|B<sub>s</sub> oscillations]]. This phase is one of the CP observables with the smallest theoretical uncertainty in the [[Standard Model]], and can be significantly modified by new physics.
* Measuring properties of radiative B decays, i.e. B meson decays with photons in the final states. Specifically, these are again [[flavour-changing neutral current]] decays.
* Tree-level determination of the [[Cabibbo–Kobayashi–Maskawa matrix|unitarity triangle]] angle γ.
* Charmless charged two-body B decays.