Charm Quark

Charm Quark(: charm quark, symbol:c) is one of the main components of and is the second generation.

Charm Quark - - Composition | Group | | Second generation |

| Anti-charm quark (c) Theory |

(1970) Discovery | _ rice _ () (1974) ___ (_) (1974) Symbol | c | 7000127000000000000 ♠ 1.27 + 0.07 -0.09 Collapsed particles |, | + 2/3 To have | 1/2 | 1 |: + 1/2,: 0 |: + 1/3,: + 4/3

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Overview

Charm quark has + 2/3, the third largest in the quark, about 1.3 GeV (which is about 1.5 times the mass of the mass).

The charm quark was predicted by,,,. At the time, only the quark was known. Predictions were made to explain multiple events in a unified way, but in a nutshell, the relationship between pairs of strange quarks, …, the first three particles of a pair of downquarks, upquarks , And I thought that there might be something corresponding to the first pair in the latter pair of upquarks.

This forecast is led by a team in the United States (BNL) led by It was confirmed by the team of SLAC (SLAC) that each independently comprised charm quark and anti-charm quark (J / ψ) was discovered. BNL The team named the new particle as J meson and the SLAC team named ψ meson, but the consultation to unify the name failed and as a compromise J / ψ meson was adopted. Samuel Tin and Burton Richter are awarded for the discovery of Japusai Meson.

Hadron including charm quark

• D mesons consist of charm quark (or anti-charm quark) or.
• Ds Meson consists of charm quarks.
• J / ψ mesons like charm - mesons with anti - charm pair are called.
• It is named after a baryon having a charm. Example: Λc particle

Related item

footnote

1. *K. Nakamura _ et al. _ () (2010). ". Reading August 11, 2010. 2. *Carl Rod Nave. "" Read on December 6, 2010. "The c quark has about 5% probability of decaying into quark instead of an s quark." 3. *K. Nakamura _ et al. (2010).. J. Phys. G _*37(075021): 150.

Acquired from ""

Post Date : 2018-02-26 14:30

This article is taken from the Japanese Wikipedia Charm Quark

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