Exploring the D∗ρ system within QCD sum rules (2013)
- Authors:
- USP affiliated authors: NIELSEN, MARINA - IF ; NAVARRA, FERNANDO SILVEIRA - IF
- Unidade: IF
- Subjects: CROMODINÂMICA QUÂNTICA; REAÇÕES NUCLEARES
- Language: Inglês
- Abstract: We present a study of the D∗ρ system made by using the method of QCD sum rules to determine the mass of possible resonances generated in the same system. Using isospin and spin projectors, we investigate the different configurations and obtain evidences for three D∗ mesons with isospin I = 1/2, spin S = 0, 1, 2 and with masses 2500 ± 67 MeV, 2523 ± 60 MeV, and 2439 ± 119 MeV, respectively. The last state can be associated with D∗ 2 (2460) (spin 2) listed by the Particle Data Group, while one of the first two might be related to D∗ (2640), with unknown spin-parity. In the case of I = 3/2 we also find evidences of three states with spin 0, 1 and 2, respectively, with masses 2467±82 MeV, 2420±128 MeV, and 2550±56 MeV. The results for the sector I = 1/2 and S = 0, 1, 2, are intriguingly similar to a previous study of the D∗ρ system based on effective field theories, supporting in this way a molecular picture for the resonances D∗ (2640) and D∗ 2 (2460), while the results for I = 3/2 hint towards the existence of exotic mesons since a multiquark configuration is required to get the quantum numbers of the states found.
- Imprenta:
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ABNT
TORRES, A Martínez et al. Exploring the D∗ρ system within QCD sum rules. . São Paulo: Instituto de Física, Universidade de São Paulo. Disponível em: http://lanl.arxiv.org/pdf/1307.1724v1.pdf. Acesso em: 20 maio 2024. , 2013 -
APA
Torres, A. M., Khemchandani, K. P., Nielsen, M., Navarra, F. S., & Oset, E. (2013). Exploring the D∗ρ system within QCD sum rules. São Paulo: Instituto de Física, Universidade de São Paulo. Recuperado de http://lanl.arxiv.org/pdf/1307.1724v1.pdf -
NLM
Torres AM, Khemchandani KP, Nielsen M, Navarra FS, Oset E. Exploring the D∗ρ system within QCD sum rules [Internet]. 2013 ;[citado 2024 maio 20 ] Available from: http://lanl.arxiv.org/pdf/1307.1724v1.pdf -
Vancouver
Torres AM, Khemchandani KP, Nielsen M, Navarra FS, Oset E. Exploring the D∗ρ system within QCD sum rules [Internet]. 2013 ;[citado 2024 maio 20 ] Available from: http://lanl.arxiv.org/pdf/1307.1724v1.pdf - QCD sum rules applications to the j/'psi' dissociation
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- Semileptonic D decay into scalar mesons
- A QCD sum rule approach to the charmonium: pion cross section
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- 'D POT.*' D'PI' and 'B POT.*' B'PI' form factors from QCD sum rules
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