Reanalysis of the e +e − → (D∗D¯∗ ) ±π ∓ reaction and the claim for the Zc(4025) resonance (2013)
- Authors:
- USP affiliated authors: NIELSEN, MARINA - IF ; NAVARRA, FERNANDO SILVEIRA - IF
- Unidade: IF
- Subjects: REAÇÕES NUCLEARES; INTERAÇÕES NUCLEARES
- Language: Inglês
- Abstract: In this paper we study the reaction e +e − → (D∗D¯∗ ) ±π ∓ in which the BESIII collaboration has claimed the existence of a 1+ resonance, named Zc(4025), in the D∗D¯∗ invariant mass spectrum with a mass around 4026 MeV and width close to 26 MeV . We determine the D∗D¯∗ invariant mass distribution and find that although the explanation considered by the BESIII collaboration is plausible, there are others which are equally possible, like a 2+ resonance or a bound state. Even more, we find that the data can be explained without the existence of a resonance/bound state. In view of the different possible interpretations found for the BESIII data, we try to devise a strategy which could help in identifying the origin of the signal reported by the BESIII collaboration. For this, we study the dependence of the D∗D¯∗ spectrum considering the different options as a function of the total center of mass energy. We arrive to the conclusion that increasing the center of mass energy from 4.26 GeV to 4.6 GeV can be useful to distinguish between a resonance, a bound state or just a pure background as being responsible for the signal found. This information should be useful for future experiments.
- Imprenta:
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ABNT
TORRES, A Martínez et al. Reanalysis of the e +e − → (D∗D¯∗ ) ±π ∓ reaction and the claim for the Zc(4025) resonance. . São Paulo: Instituto de Física, Universidade de São Paulo. Disponível em: http://lanl.arxiv.org/pdf/1310.1119.pdf. Acesso em: 21 maio 2024. , 2013 -
APA
Torres, A. M., Khemchandani, K. P., Nielsen, M., Navarra, F. S., & Oset, E. (2013). Reanalysis of the e +e − → (D∗D¯∗ ) ±π ∓ reaction and the claim for the Zc(4025) resonance. São Paulo: Instituto de Física, Universidade de São Paulo. Recuperado de http://lanl.arxiv.org/pdf/1310.1119.pdf -
NLM
Torres AM, Khemchandani KP, Nielsen M, Navarra FS, Oset E. Reanalysis of the e +e − → (D∗D¯∗ ) ±π ∓ reaction and the claim for the Zc(4025) resonance [Internet]. 2013 ;[citado 2024 maio 21 ] Available from: http://lanl.arxiv.org/pdf/1310.1119.pdf -
Vancouver
Torres AM, Khemchandani KP, Nielsen M, Navarra FS, Oset E. Reanalysis of the e +e − → (D∗D¯∗ ) ±π ∓ reaction and the claim for the Zc(4025) resonance [Internet]. 2013 ;[citado 2024 maio 21 ] Available from: http://lanl.arxiv.org/pdf/1310.1119.pdf - QCD sum rules applications to the j/'psi' dissociation
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