η-π0 mixing and ψ′ → ψπ0 decay
TL;DR: In this paper, the ψ′ → ψπ0 decay rate was studied in a chiral symmetry breaking scheme by including effects from π 0-η mixing only.
About: This article is published in Physics Letters B.The article was published on 1981-05-14. It has received 5 citations till now. The article focuses on the topics: Mixing (physics) & Chiral symmetry breaking.
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CERN1
TL;DR: In an experiment performed at the 70 GeV IHEP accelerator the rate decay η '(958) → 3 π 0, which violates isosoin conservation, has been observed.
19 citations
TL;DR: In this article, the authors estimate the decay width of 0 ± -glueballs by taking account of the mixings with η and η through their anomalous coupling, and find a pseudoscalar glueball with a broad decay width, if its mass is larger than m δ (980) + m π.
7 citations
TL;DR: In this article, the theoretical implications of the Crystal Ball search for the 1P1 state of charmonium have been discussed, and a recent paper which discusses the theoretical implication of the search has been published.
2 citations
TL;DR: In this article, the effects of η−π mixing on the violation of the |ΔI|=1/2 rule in weak transitions were considered. But the effects were not considered in the case of K→2π, K→3π, Λ, Ξ and Λ hyperon decays.
Abstract: We consider the effects ofη−π mixing on the violation of the |ΔI|=1/2 rule in |ΔS|=1 weak transitions. The processes considered are theK→2π,K→3π, Λ, Ξ and Λ hyperon decays.
1 citations
TL;DR: In this paper, the isospin nonconserving process eta to 3 pi 0 and Psi'to Psi pi 0 are considered in relation to the possibility of a massless up quark.
Abstract: The isospin non-conserving process eta to 3 pi 0 and Psi ' to Psi pi 0 are considered in relation to the possibility of a massless up quark.
References
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TL;DR: In this article, the authors investigated the behavior under SU3×SU3 of the hadron energy density and the closely related question of how the divergences of the axial-vector currents and the strangeness-changing vector currents transform under SU 3×SU 3.
Abstract: We investigate the behavior under SU3×SU3 of the hadron energy density and the closely related question of how the divergences of the axial-vector currents and the strangeness-changing vector currents transform under SU3×SU3. We assume that two terms in the energy density break SU3×SU3 symmetry; under SU3 one transforms as a singlet, the other as the member of an octet. The simplest possible behavior of these terms under chiral transformations is proposed: They are assigned to a single (3,3*)+(3*,3) representation of SU3×SU3 and parity together with the current divergences. The commutators of charges and current divergences are derived in terms of a single constant c that describes the strength of the SU3-breaking term relative to the chiral symmetry-breaking term. The constant c is found not to be small, as suggested earlier, but instead close to the value (-sqrt[2]) corresponding to an SU2×SU2 symmetry, realized mainly by massless pions rather than parity doubling. Some applications of the proposed commutation relations are given, mainly to the pseudoscalar mesons, and other applications are indicated.
1,475 citations
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409 citations
TL;DR: Using the algebra of currents and the sum rules recently derived by Weinberg, this article calculated the electromagnetic mass difference of pions and obtaim mπ+−mπ0≃5.0 MeV.
Abstract: Using the algebra of currents and the sum rules recently derived by Weinberg, we calculate the electromagnetic mass difference of pions and obtaim mπ+−mπ0≃5.0 MeV.
310 citations
31 citations
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TL;DR: In this article, it was shown that m/sub u/ = 0 does not lead to numerical disagreements and that it implies an improvement of the SU(2) x SU( 2) symmetry.
Abstract: It is shown that m/sub u/ = 0 does not lead to numerical disagreements and that it implies an improvement of the SU(2) x SU(2) symmetry.
30 citations