Q2 duality and rare pion decays

L. Bergström; E. Massó; Ll Ametller; A. Bramon

doi:10.1016/0370-2693(83)90030-8

Q² duality and rare pion decays

L. Bergström, E. Massó, Ll Ametller, A. Bramon

Departament de Física

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46 Cites (Scopus)

Resum

Es discuteixen algunes peculiaritats de l'amplitud π0→e+e-. L'equivalència entre la dominància del mesó vectorial i els models quark s'estableix clarament (dualitat Q2). Les escales de massa rellevants en aquesta desintegració impliquen algunes propietats universals per a l'amplitud. La relació Bπ≡ Γ(π0→e+e-) Γ(π0→γγ) depèn només d'un tall característic i no dels detalls dels models. La nostra predicció independent del model és Bπ∼6×10-8, molt per sota de les dades experimentals. © 1983.

Idioma original	Anglès
Pàgines (de-a)	117-121
Revista	Physics Letters B
Volum	126
DOIs	https://doi.org/10.1016/0370-2693(83)90030-8
Estat de la publicació	Publicada - 23 de juny 1983

Accés al document

10.1016/0370-2693(83)90030-8

Altres arxius i enllaços

https://www.scopus.com/pages/publications/33744587250

Com citar-ho

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title = "Q2 duality and rare pion decays",

abstract = "Some peculiarities of the π0→e+e- amplitude are discussed. The equivalence between vector meson dominance and quark models is clearly established (Q2 duality). The relevant mass scales in that decay imply some universal properties for the amplitude. The braching ratio Bπ≡ Γ(π0→e+e-) Γ(π0→γγ) depends only on a characteristic cut-off and not on the details of the models. Our model-insensitive prediction is Bπ∼6×10-8, far below the experimental data. {\textcopyright} 1983.",

author = "L. Bergstr{\"o}m and E. Mass{\'o} and Ll Ametller and A. Bramon",

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T1 - Q2 duality and rare pion decays

AU - Bergström, L.

AU - Massó, E.

AU - Ametller, Ll

AU - Bramon, A.

PY - 1983/6/23

Y1 - 1983/6/23

N2 - Some peculiarities of the π0→e+e- amplitude are discussed. The equivalence between vector meson dominance and quark models is clearly established (Q2 duality). The relevant mass scales in that decay imply some universal properties for the amplitude. The braching ratio Bπ≡ Γ(π0→e+e-) Γ(π0→γγ) depends only on a characteristic cut-off and not on the details of the models. Our model-insensitive prediction is Bπ∼6×10-8, far below the experimental data. © 1983.

AB - Some peculiarities of the π0→e+e- amplitude are discussed. The equivalence between vector meson dominance and quark models is clearly established (Q2 duality). The relevant mass scales in that decay imply some universal properties for the amplitude. The braching ratio Bπ≡ Γ(π0→e+e-) Γ(π0→γγ) depends only on a characteristic cut-off and not on the details of the models. Our model-insensitive prediction is Bπ∼6×10-8, far below the experimental data. © 1983.

UR - https://www.scopus.com/pages/publications/33744587250

U2 - 10.1016/0370-2693(83)90030-8

DO - 10.1016/0370-2693(83)90030-8

M3 - Article

SN - 0370-2693

VL - 126

SP - 117

EP - 121

JO - Physics Letters B

JF - Physics Letters B