Flavour physics

Quarkonium physics at the dawn of the LHC era

Résumé La physique du quarkonium à l’aube du LHC Le groupe de travail sur le quarkonium a été constitué en 2002 pour faire avancer la recherche et promouvoir la com...

Belle Collaboration discovers new meson

The Belle collaboration at KEK has recently announced the discovery of an exotic new particle with non-zero electric charge. This particle, which the researchers have named the Z(4430), does not fit i...

Understanding flavour is the key to new physics

Résumé Comprendre la saveur pour accéder à la nouvelle physique La physique portant sur les divers types (ou saveurs) de quarks a un fort impact sur la physique des particules et e...

B-factories yield first evidence for elusive D⁰–D̅⁰ mixing

It is more than 50 years since researchers first observed particle–antiparticle mixing, with the discovery of a second, longer-lived neutral kaon state. This discovery pre-dated the quark model, but...

BaBar Collaboration submits its 200th paper

A paper entitled “Measurement of Bbar0 → D(*)0Kbar(*)0 Branching Fractions” became the focus of celebrations in early April, as it became the 200th to be submitted for publ...

BaBar collaboration detects new resonance

Charmonium spectroscopy has seen a revival over the past year or so, with various groups reporting heavy charmonium states (see CERN Courier January 2004 p9). The BaBar collaboration has now added to ...

BaBar finds direct CP violation in B decays

It is a classic example of the question to ask aliens from a distant galaxy to discover if they are made from what we on Earth define as matter or antimatter. Tell them to make neutral B mesons and an...

BaBar’s new particle shows unexpected traits

The BaBar experiment at SLAC has revealed a new narrow particle state that has been identified as a charmed meson, that is, a charm quark, c, bound with an antiquark, in this case a strange antiquark,...