Updated measurement of the CP-violating phase φs
φs = -0.041±0.025 rad (LHCb)φs = -0.055±0.021 rad (World) The LHCb collaboration has submitted for publication an updated measurement of the CP-violating phase φs in Bs0 meson decays. The precision…
Observation of new pentaquarks
m(Pc+(4312)) = 4311.9±0.7+6.8/-0.6 MeV, Γ = 9.8±2.7+3.7/-4.5 MeVm(Pc+(4440)) = 4440.3±1.3+4.1/-4.7 MeV, Γ = 20.6±4.9+8.7/-10.1 MeVm(Pc+(4457)) = 4457.3±0.6+4.1/-1.7 MeV, Γ = 6.4±2.0+5.7/-1.9 MeV Today at the Rencontres de Moriond QCD conference,…
Update of lepton universality test measurement RK
Today at the Rencontres de Moriond EW conference, the LHCb Collaboration presented an updated measurement of the ratio RK, an important test of a principle of the Standard Model of…
Discovery of CP violation in charm particle decays
An important milestone in the history of particle physics. The LHCb collaboration has just presented at the Rencontres de Moriond EW and in a special CERN Seminar the first observation…
Observation of an excited charmed beauty particle
Observation of an excited Bc+ state. This week the LHCb collaboration announced the observation of an excited Bc+ state, confirming measurements by the ATLAS and CMS collaborations. The results were…
Observation of a new charmonium state
… and study of near-threshold D0D0 spectroscopy. This week the LHCb Collaboration announced the discovery of a new particle made of a charm and anti-charm quark. The results, which were…
New particles and precise measurements
The LHCb Collaboration presented new interesting results at the Large Hadron Collider Committee (LHCC) open session and at the CKM workshop in Heidelberg. Selected topics are listed below. (1) Observation…
Puzzling measurement of the Ωc0 charmed baryon lifetime
Today the LHCb collaboration submitted for publication the result of a measurement of the lifetime of the Ωc0 baryon, i.e. a composite particle composed of css quarks. The Ωc0 baryon…
Re-discovery of an exceptionally charming particle
A year ago the LHCb collaboration announced the observation of an exceptionally charmed particle, the Ξcc++ baryon. This particle contains two charm quarks and one up quark, resulting in an…
Long life(time) of the exceptionally charmed particle Ξcc++
Last year the LHCb Collaboration announced the observation of an exceptionally charmed particle, the Ξcc++ baryon. This contains two charm quarks and one up quark, resulting in an overall doubly…