Observation of an exceptionally charming tetraquark.
This week at the European Physical Society conference on high energy physics, EPS-HEP 2021 the LHCb Collaboration presented the first observation of a doubly charmed tetraquark, Tcc+, with a new…
The charm of a proton
Today at the European Physical Society conference on high energy physics, EPS-HEP 2021 the LHCb Collaboration presented results of a measurement consistent with the presence of valence-like charm content in…
Branching fraction tension
The Bs→φμ+μ– branching fraction measured below the Standard Model prediction. This week at the Flavor Physics and CP Violation (FPCP) conference in Shanghai, China, the LHCb Collaboration presented a measurement…
First observation of the mass difference between neutral charm mesons.
m1-m2 = 6.4×10-6 eV = 0.00000000000000000000000000000000000001 grams (1×10-38g) (m1-m2)/(D0mass) = 3×10-15 Today, the LHCb Collaboration submitted a paper for publication that reports the first observation of the mass difference between…
Fascinating quantum mechanics
Precise determination of the Bs0−Bs0 oscillation frequency. “A phenomenon in which quantum mechanics gives a most remarkable prediction” – Richard Feynman Today, the LHCb Collaboration submitted a paper for publication…
Improved measurement of Bs0→ μ+μ- decays
Today, at the Rencontres de Moriond EW and at the CERN seminar, the LHCb collaboration presented an improved measurement of the very rare Bs0→ μ+μ– decay. The measured branching fraction…
Strengthened hints for a violation of lepton universality in B decays.
Update of RK measurement Today at the Rencontres de Moriond EW conference and at a seminar at CERN, the LHCb Collaboration presented an updated measurement of the ratio RK, an…
Observation of two ccus tetraquarks and two ccss tetraquarks
Welcome to tetraquark discovery territory Today, the LHCb Collaboration submitted a paper for publication that reports the first observation of two tetraquarks with a new quark content ccus, decaying to…
LHC as a Large Hadron Discovery Factory
The LHC, Large Hadron Collider, is a particle collider in which accelerated protons collide inside four large experiments. Hadrons (Greek: ἁδρός, hadrós, meaning “stout, thick”) are a class of particles…
Observation of a four-charm-quark tetraquark
A “smoking gun” for tightly bound tetraquarks? Today, the LHCb collaboration submitted a paper reporting the discovery of a possible tetraquark candidate, Tcccc, composed of two charm quarks and two…