K meson

Also found in: Dictionary, Thesaurus, Wikipedia.

K meson

[′kā ¦mā‚sän]

(particle physics)

Collective name for four pseudo-scalar mesons, having masses of about 495 MeV (megaelectronvolts) and decaying via weak interactions: K ⁺, K ^-, K ⁰_S, and K ⁰_L; they consist of two isotopic spin doublets, the (K ⁺, K ⁰) doublet and its antiparticle doublet (K ^-, K̄ ⁰), having hypercharge or strangeness of +1 and -1 respectively, where K ⁰ and K̄ ⁰ are certain combinations of K_L⁰ and K_S⁰ states. Also known as kaon.

Collective name for any meson resonance belonging to an isotopic doublet with hypercharge +1 or -1, denoted K_JP(m) or K̄_JP(m) respectively, where m is the mass in megaelectronvolts, and J and P are the spin and parity.

References in periodicals archive ?

In the present section, we perform the numerical analysis of the light cone sum rules for the strong coupling constants of spin 1/2 negative parity heavy baryons with [pi] and K mesons obtained in the previous section.

Strong Coupling Constants of Negative Parity Heavy Baryons with [pi] and K Mesons

Fitch, now of Princeton University, and their colleagues revealed that nature--or at least particles called K mesons, or kaons--didn't behave as expected.

Antimatter-Matter Mirror Shows Warp

A 1964 experiment shocked physicists with its revelation that some particles known as K mesons would follow an altered pattern of decay if swapped with their antiparticles and reflected in a mirror.

Decays may reflect matter-antimatter rift

There is also evidence from particle physics, found in the behavior of K mesons. Fishback points out that this evidence links the fifth force to electromagnetism and the weak interaction, while his Eotvos work links it to gravity.

Unconventional physics: 'quite crazy' after all these years

CITE

Site: Follow: Share:

Open / Close