LHCb sees a new flavour of matter–antimatter asymmetry

The LHCb collaboration has just presented at the Rencontres de Moriond EW and in a special CERN Seminar the first observation of CP violation in charm particle decays.
The LHCb collaboration has just presented at the Rencontres de Moriond EW and in a special CERN Seminar the first observation of CP violation in charm particle decays. Quarks can be split into two sectors: those with the same electrical charge as the up quark (up-type quarks, charge +2/3), and those with the same charge as the down quark (down-type quarks, charge -1/3). Differences in the properties of matter and antimatter, arising from the so-called phenomenon of CP violation, had been observed in the past using the decays of K and B mesons, i.e. of particles that contain strange or beauty quarks, which are both down-type quarks. By contrast, despite decades of experimental searches, CP violation in the decays of charmed particles, i.e. containing the charm quark, which is an up-type quark, escaped detection so far. The result announced today constitutes the first observation of CP violation in decays of a charmed particle.
More news
- Orbital tomography of a complex catalyst
- Dectris Prize 2019 Karin von Arx
- Group Fabian Natterer: Publication in PRB Rapid Comm
- Open Day 2019, November 22, 15:00-19:00
- Congratulations to Titus Neupert
- Prof. Dr. Alexey Soluyanov, SNF professor for theoretical solid-state physics, has passed away
- Congratulations to Marta Gibert
- Scientifica 2019
- Top and bottom quarks - spotlight on the higgs boson
- Particle Physics with top quark pairs
- Annual Report 2018
- CMS Thesis Award 2018
- XENON - measurement of slowest radioactive decay
- Thermodynamic Magic - Cooling without Energy Consumption
- Mercator Award: Jury Prize for Frank Schindler
- Flavor Anomalies and the origin of the Yukawa couplings
- LHCb: Update of lepton universality test measurement RK
- APS physics awards Titus Neupert as 'Outstanding Referee'
- Astronomy and Astrophysics journal highlights HESS results
- Cuprate Trilogy
- Photoelectrons from under water
- Appointments: Prof. Dr. Johan Chang und Prof. Dr. Titus Neupert
- Winner of the 2019 Poster Award