Pole position of the a1(1260) from τ-decay

We perform an analysis of the three-pion system with quantum numbers JPC=1++ produced in the weak decay of τ leptons. The interaction is known to be dominated by the axial meson a1(1260). We build a model based on approximate three-body unitary and fix the free parameters by fitting it to the ALEPH...

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Bibliographic Details
Published in:Physical review. D 2018-11, Vol.98 (9), p.096021
Main Authors: Mikhasenko, M, Pilloni, A, Jackura, A, Albaladejo, M, Fernández-Ramírez, C, Mathieu, V, Nys, J, Rodas, A, Ketzer, B, Szczepaniak, A P
Format: Article
Language:English
Subjects:
Decay
Leptons
NUCLEAR PHYSICS AND RADIATION PHYSICS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum numbers
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