B meson


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B meson

n.
Either of two mesons, one neutral and one positively charged, containing a bottom antiquark and having masses about 10,330 times that of an electron and mean lifetimes of about 1.6 × 10-12 second.
References in periodicals archive ?
They recently observed new behaviour of this particle, called a B meson, at the LHC atom smasher.
Although small, the 1 percent surplus is 50 times larger than the asymmetry between matter and antimatter predicted for B meson decays by the standard model of particle physics, notes DZero spokesperson Stefan Soldner-Rembold of the University of Manchester in England.
Using electron and positron beams, the B Factory is designed to probe the decay of the B Meson particle to determine differences in the behavior of matter and antimatter.
In one of the more unusual decay paths--so rare it happens only about once in every million decays--a B meson turns into a particle called a K* meson and a particle-antiparticle pair.
So, physicists must turn to theory to distinguish those features due exclusively to the decay of the b quark from the elaborate dance of quarks, antiquarks, and gluons inside a decaying B meson.
Linear Accelerator Center (SLAC) and at the KEK High Energy Accelerator Research Organization in Tsukuba, Japan, have been colliding tens of millions of electrons and their antimatter counterparts, positrons, looking for firm evidence of B meson CP violation (SN: 5/29/99, p.
Scientists have also reported preliminary indications of a CP violation in experiments with a particle called a B meson (SN: 2/20/99, p.
The prevailing model of particle physics, which appears to account for the asymmetrical decays of Ks and calls for asymmetry in certain B meson decays as well, falls short of predicting the observed disparity.
During experiments conducted between June last year and July this year, the physicists found evidence suggesting that anti-B mesons decay earlier than B mesons, which would lend weight to the theory that particles and antiparticles are not completely symmetrical, the researchers say.
The energies of the beams soon will be precisely tuned to produce large quantities of heavy subatomic particles known as B mesons.
In 2001, researchers in California and Japan uncovered a type of CP violation among B mesons (SN: 3/3/01, p.
Linear Accelerator Center (SLAC) announced they had proved that hefty subatomic particles, known as B mesons and anti-B mesons, decay into lighter particles in slightly different ways.