Experimental evidence for a light and broad scalar resonance in $$D^+ \to \pi^- \pi^+ \pi^+$$ decay
From a sample of $$1172 \pm 61$$ $$D^+ \to \pi^- \pi^+ \pi^+$$ decay, we find $$\Gamma (D^+ \to \pi^- \pi^+ \pi^+) / \Gamma (D^+ \to K^- \pi^+ \pi^+) = 0.0311 \pm 0.0018 ^{+0.0016}_{-0.0026}$$. Using a coherent amplitude analysis to fit the Dalitz plot of this decays, we find strong evidence that a scalar resonance of mass $$478^{+24}_{-23} \pm 17$$ MeV/$c^2$ and width $$324^{+42}_{-40} \pm 21$$ MeV/$c^2$ accounts for approximately half of all decays.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- E791
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1887841
- Report Number(s):
- CBPF-NF-056-00; FERMILAB-PUB-99-322-E; arXiv:hep-ex/0007028; oai:inspirehep.net:530320
- Journal Information:
- Phys.Rev.Lett., Journal Name: Phys.Rev.Lett. Vol. 86
- Country of Publication:
- United States
- Language:
- English
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