Physicists unlock precise measurements of exotic beauty particles
Scientists at Europe's LHC have observed rare decays of hidden-beauty particles and measured their properties with unprecedented precision. The breakthrough refines our understanding of fundamental particle physics and validates theoretical models that underpin next-generation detector designs and particle-collision experiments worldwide.
Originaltitel: Observation of muonic Dalitz decays of chib mesons and precise spectroscopy of hidden-beauty states
<p>The decays of the chi(b1)(1P), chi(b2)(1P), chi(b1)(2P) and chi(b2)(2P) mesons into the Upsilon(1S)mu(+)mu(-) final state are observed with a high significance using proton-proton collision data collected with the LHCb detector and corresponding to an integrated luminosity of 9 fb(-1). The newly observed decays together with the Upsilon(2S) -> Upsilon(1S)pi(+)pi(-) and Upsilon(3S) -> Upsilon(2S)pi(+)pi(-) decay modes are used for precision measurements of the mass and mass splittings for the hidden-beauty states.</p>