Posted: Apr 22, 2010 10:20 am
by newolder
klazmon wrote:
newolder wrote:lhc-b sees decay of its first beauty particle.

The meson B+ is an anti-b and u quark pair that decays some distance from its source.


I wonder why they didn't stick with b(eauty) quark and t(ruth) quark instead of the boring b(ottom) and t(op) quarks.

I don't know how the Council For Naming Things works but my guess is the philosophers on that council probably don't like the idea of lowly physicists having a handle on the properties of truth and beauty. :dunno: :lol:
Rumraket wrote:This is not something "new" right? This is only another step on their way to reaffirm the standard model and already known physics in order to better understand the machine?

Correct. At these energies this confirms the lhc as a veritable beauty factory.

See also:
C. Amsler et al. (Particle Data Group), PL B667, 1 (2008) (URL: http://pdg.lbl.gov)
Many measurements of B decays involve admixtures of B hadrons. Previously we arbitrarily included such admixtures in the B± section, but because of their importance we have created two new sections: “B±/B0 Admixture” for Υ(4S) results and “B±/B0/B0s/b-baryon Admixture” for results at higher energies. Most inclusive decay branching fractions and χb at high energy are found in the Admixture sections. B0-B0 mixing data are found in the B0 section, while B0s-B0s mixing data and B-B mixing data for a B0/B0s admixture are found in the B0s section. CP-violation data are found in the B±, B0, and B± B0 Admixture sections. B-baryons are found near the end of the Baryon section.