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d-meson
D meson
The D mesons are the lightest particle containing charm quarks. They are often studied to gain knowledge on the weak interaction.
Overview
The D mesons were discovered in 1976 during the Mark I experiments at the Stanford Linear Accelerator Center
Since the D meson is the lightest meson containing a charm quark, it must change the charm quark into another quark to decay. Quark transmutations take place via the weak interaction. In D mesons, the charm quark changes into a strange quark with a W particle and then decays into 's and 's.
List of D mesons
| Particle | Symbol | Anti-particle | Quark Makeup | Spin and parity | Rest mass MeV/c² | S | C | B | Mean lifetime s | Principal decays |
|---|---|---|---|---|---|---|---|---|---|---|
| D meson | - | Pseudoscalar | 1869 | 0 | +1 | 0 | ||||
| D meson | Pseudoscalar | 1865 | 0 | +1 | 0 | |||||
| Strange D meson | Pseudoscalar | 1968 | +1 | +1 | 0 |
- Note: The is an excited state of the .
See also
References
Wikipedia, the free encyclopedia © 2001-2006 Wikipedia contributors (Disclaimer)
This article is licensed under the GNU Free Documentation License.
Last updated on Friday September 26, 2008 at 05:57:15 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation
This article is licensed under the GNU Free Documentation License.
Last updated on Friday September 26, 2008 at 05:57:15 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation
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