Kaon
Basic properties

Kaon

Section Title: Basic properties
Table Section Text: None

Particle name	Particle symbol	Antiparticle symbol	Quark content	Rest mass (MeV/c2)	IG	JPC	S	C	B'	Mean lifetime (s)	Commonly decays to (>5% of decays)

Kaon	K+	K−	u s	493.677±0.016	​1⁄2	0−	1	0	0	(1.2380±0.0021)×10−8	μ+ + ν μ or π+ + π0 or π+ + π+ + π− or π0 + e+ + ν e

Kaon	K0	K0	d s	497.611±0.013	​1⁄2	0−	1	0	0

K-Short	K0 S	Self	497.611±0.013	​1⁄2	0−	(*)	0	0	(8.954±0.004)×10−11	π+ + π− or π0 + π0

K-Long	K0 L	Self	497.611±0.013	​1⁄2	0−	(*)	0	0	(5.116±0.021)×10−8	π± + e∓ + ν e or π± + μ∓ + ν μ or π0 + π0 + π0 or π+ + π0 + π−

Sentence(s)

The kaons K have mass 493.677±0.013 MeV.

final_sentence: The kaons K have mass 493.677±0.013 MeV.