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 ?
(Belle Collaboration) (2001) Observa tion of large CP violation in the neutral B meson system.
Stone and his team have now observed a new kind of decay process of the B meson that had been previously theorized but never before seen.
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.
Answers to this question may be found in studies of K, B meson decays and also in searches for CP- or T-violation in other areas of physics.
An important feature of B meson physics is that it is sensitive to New Physics (NP) Beyond the Standard Model (BSM) via rare decays.
If an additional mystery particle were produced in the decay, it would have to be much heavier than the B meson that decayed in the first place.
CP violation (which implies T violation by the CPT theorem) as well as T violation itself has been observed in the [K.sup.0] and B meson systems.
In particular, there has been an enormous interest in studying the decay properties of the B meson due to its outstanding properties [42].
The spectroscopy of bottomonium and B meson has been studied using the free-form smearing in [71].
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. Once the scientists have mathematically isolated the breakdown of the quark, they might then discern new physical phenomena that influence the quark's decay.
Hinson et al., "Study of [[chi].sub.c1] and [[chi].sub.c2] meson production in B meson decays," Physical Review D, vol.
In the B meson decay into states with an [eta], in the case of B [right arrow] J/[psi][eta]K, since the [eta] meson is described by the u[bar.u], d[bar.d], and s[bar.s] combination, there are two different color-suppressed internal W-emission Feynman diagrams; the [B.sup.0] [right arrow] J/[psi][eta][K.sup.0] decay mode contains s[bar.s] and d[bar.d] pairs while the [B.sup.+] [right arrow] J/[psi][eta][K.sup.+] decay mode includes s[bar.s] and u[bar.u] pairs of the [eta] components.