Decays of tensor mesons and the tensor glueball in an effective field approach

Amand Faessler; F. Giacosa; Th. Gutsche; V. E. Lyubovitskij

arxiv: hep-ph/0511171 · v1 · submitted 2005-11-14 · ✦ hep-ph

Decays of tensor mesons and the tensor glueball in an effective field approach

F. Giacosa , Th. Gutsche , V. E. Lyubovitskij , Amand Faessler This is my paper

classification ✦ hep-ph

keywords tensorapproachdecayseffectivefieldglueballmesonscandidates

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The strong and electromagnetic decays of the ground-state tensor mesons are studied in an effective field approach. A fit to the well-known experimental data is performed. The decay ratios of the tensor glueball are evaluated and possible candidates are discussed.

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Improved Standard-Model predictions for $\eta^{(\prime)}\to \ell^+ \ell^-$
hep-ph 2025-12 accept novelty 5.0

Updated SM predictions yield Br(η→e⁺e⁻)=5.37(4)(2)[4]×10⁻⁹, Br(η→μ⁺μ⁻)=4.54(4)(2)[4]×10⁻⁶, Br(η'→e⁺e⁻)=1.80(2)(3)[3]×10⁻¹⁰, and Br(η'→μ⁺μ⁻)=1.22(2)(2)[3]×10⁻⁷, with a mild 1.6σ tension in the η→μ⁺μ⁻ channel.