Triangle mechanism in τ → f1(1285)πντ decay
We show that the τ− decay into f1(1285)π−ντ is dominated by a triangle loop mechanism with K⁎, K¯⁎ and K (or K¯) as internal lines, which manifests a strong enhancement reminiscent of a nearby singularity present in the narrow K⁎ limit and the near K¯⁎K⁎ threshold of the internal K⁎ propagators. The...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318304209 |