For the 2022 Italian comedy film, see Strangeness (film).
See also: Strangeness and quark–gluon plasma
Flavour in particle physics
Flavour quantum numbers
Isospin: I or I3
Charm: C
Strangeness: S
Topness: T
Bottomness: B′
Related quantum numbers
Baryon number: B
Lepton number: L
Weak isospin: T or T3
Electric charge: Q
X-charge: X
Combinations
Hypercharge: Y
Y = (B + S + C + B′ + T)
Y = 2 (Q − I3)
Weak hypercharge: YW
YW = 2 (Q − T3)
X + 2YW = 5 (B − L)
Flavour mixing
CKM matrix
PMNS matrix
Flavour complementarity
v
t
e
In particle physics, strangeness (symbol S)[1][2] is a property of particles, expressed as a quantum number, for describing decay of particles in strong and electromagnetic interactions which occur in a short period of time. The strangeness of a particle is defined as:
where n s represents the number of strange quarks ( s ) and n s represents the number of strange antiquarks ( s ). Evaluation of strangeness production has become an important tool in search, discovery, observation and interpretation of quark–gluon plasma (QGP).[3] Strangeness is an excited state of matter and its decay is governed by CKM mixing.
The terms strange and strangeness predate the discovery of the quark, and were adopted after its discovery in order to preserve the continuity of the phrase: strangeness of particles as −1 and anti-particles as +1, per the original definition. For all the quark flavour quantum numbers (strangeness, charm, topness and bottomness) the convention is that the flavour charge and the electric charge of a quark have the same sign. With this, any flavour carried by a charged meson has the same sign as its charge.
^Jacob, Maurice (1992). The Quark Structure of Matter. World Scientific Lecture Notes in Physics. Vol. 50. World Scientific. doi:10.1142/1653. ISBN 978-981-02-0962-9.
phrase: strangeness of particles as −1 and anti-particles as +1, per the original definition. For all the quark flavour quantum numbers (strangeness, charm...
introducing the flavour SU(3) and strangeness as a new quantum number. Strange matter Strange quark Gell-Mann, M. (1982). "Strangeness". Le Journal de Physique...
name Strangeness, a property of elementary particles in physics Strange, Ontario, Canada, a hamlet Strange (TV series), a British programme Strange+, Japanese...
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called the 2. One doublet of strangeness +1 contains the K+ and the K0 . The antiparticles form the other doublet (of strangeness −1). [*] See Notes on neutral...
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(xénos), "strange, foreign, or alien", and φόβος (phóbos), "fear") is the fear or dislike of anything which is perceived as being foreign or strange. It is...
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