This MedLibrary.org supplementary page on B meson is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
B mesons are mesons composed of a bottom antiquark and either an up (B+), down (B0), strange (B0s) or charm quark (B+c). The combination of a bottom antiquark and a top quark is not thought to be possible because of the top quark's short lifetime. The combination of a bottom antiquark and a bottom quark is not a B meson, but rather bottomonium.
Each B meson has an antiparticle that is composed of a bottom quark and an up (B−), down (B0), strange (B0s) or charm antiquark (B−c) respectively. The neutral B mesons, B0 and B0s, spontaneously transform into their own antiparticles and back. This phenomenon is called flavor oscillation and has been measured in the B0/B0 system to be about 0.496 ps−1,1 and in the B0s/B0s system to be 17.77 ± 0.17 ps−1.2
| Particle | Symbol | Anti-particle | Quark content |
Isospin (I) |
Spin and parity (JP) |
Rest mass (MeV/c2) |
S | C | B' | Mean lifetime (s) |
Commonly decays to |
|---|---|---|---|---|---|---|---|---|---|---|---|
| B meson | B+ | B− | ub | 1⁄2 | 0− | 5,279.15 ± 0.31 | 0 | 0 | +1 | 1.638 ± 0.011 × 10−12 | See B± decay modes |
| B meson | B0 | B0 | db | 1⁄2 | 0− | 5,279.53 ± 0.33 | 0 | 0 | +1 | 1.530 ± 0.009 × 10−12 | See B0 decay modes |
| Strange B meson | B0s | B0s | sb | 0 | 0− | 5,366.3 ± 0.6 | −1 | 0 | +1 | 1.470+0.027−0.026 × 10−12 | See B0s decay modes |
| Charmed B meson | B+c | B−c | cb | 0 | 0− | 6,276 ± 4 | 0 | +1 | +1 | 0.46 ± 0.07 × 10−12 | See B±c decay modes |
References
- ^ http://repository.ubn.ru.nl/bitstream/2066/26242/
- ^ A. Abulencia et al., CDF Collaboration, Phys. Rev. Lett. 97 242003 (2006).
External links
 |
This particle physics-related article is a stub. You can help Wikipedia by expanding it. |
Wikipedia content modification information:
- This page was last modified on 27 November 2008, at 04:33.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "B meson".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.