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Therefore, the intrinsic parity of a meson is the product of the intrinsic parities of the quark (+1) and antiquark (−1). As these are different, their product is −1, and so it contributes the "+1" that appears in the exponent.
Mesons named with the letter "f" are scalar mesons (as opposed to a pseudo-scalar meson), and mesons named with the letter "a" are axial-vector mesons (as opposed to an ordinary vector meson) a.k.a. an isoscalar vector meson, while the letters "b" and "h" refer to axial-vector mesons with positive parity, negative C-parity, and quantum numbers I G of 1 + and 0 − respectively.
meson (a) and two π + mesons (b and c). The π − meson interacts with a nucleus in the emulsion at B. The π ± mesons have a mass of 139.6 MeV/c 2 and a mean lifetime of 2.6033 × 10 −8 s. They decay due to the weak interaction. The primary decay mode of a pion, with a branching fraction of 0.999877, is a leptonic decay into a muon and a ...
The intrinsic parity of the pion is P = −1 (since the pion is a bound state of a quark and an antiquark, which have opposite parities, with zero angular momentum), and parity is a multiplicative quantum number. Therefore, assuming the parent particle has zero spin, the two-pion and the three-pion final states have different parities (P = +1 ...
C parity: −1: In particle physics, a rho meson is a short-lived hadronic particle that is an isospin triplet whose three states are denoted as
In physics, a parity transformation (also called parity inversion) is the flip in the sign of one spatial coordinate. ... such as rho meson decay to pions. ...
The charmed eta meson (η c) and bottom eta meson (η b) are similar forms of quarkonium; they have the same spin and parity as the (light) η defined, but are made of charm quarks and bottom quarks respectively. The top quark is too heavy to form a similar meson, due to its very fast decay.
P = (−1) L+1, where the 1 in the exponent arises from the intrinsic parity of the quark–antiquark pair. C = (−1) L+S for mesons which have no flavor. Flavored mesons have indefinite value of C. For isospin I = 1 and 0 states, one can define a new multiplicative quantum number called the G-parity such that G = (−1) I+L+S.