Estados exóticos do Charmonium (2013)
- Autores:
- Autor USP: NIELSEN, MARINA - IF
- Unidade: IF
- Assunto: CROMODINÂMICA QUÂNTICA
- Idioma: Inglês
- Resumo: In this thesis, the QCD sum rules approach has been used to study the nature of the following charmonium resonances: Y (3930), Y (4140), X(4350), Y (4260), Y (4360) and Y (4660). There is a strong evidence that these states have non-conventional (or exotic) hadronic structures since their respective masses and decay channels observed experimentally are inconsistent with expected for a conventional charmonium state (cc ). The same phenomenon occurs on the bottomonium sector (b b), where new states like Yb(10890) and Yb(11020) observed recently could indicate the existence of new bottomonium exotic states. In this way, one veri es that the Y (4140) state could be described as a D sD s (0++) molecular state or even as a mixture of D sD s (0++) and DD (0++) molecular states. For the Y (3930) and X(4350) states, both cannot be described as a DD (0++) and D sD s0 (1-+), respectively. From the sum rule point of view, the Y (4660) state could be described as a 0 f0(980) (1--) molecular state. The extension to the bottomonium sector is done in a straightforward way to demonstrate that the 0 f0(980) molecular state is a good candidate for describing the structure of the Yb(10890) state. In the following, one estimates the mass of the exotic Bc-like molecular states using the sum rule approach, where these new exotic states would correspond to bound states of D() and B() mesons. All of these mass predictions could (or not) be checked in a near future experiments at LHC. A large study using the Double Ratio of Sum Rules approach has been evaluated for studying the heavy baryon masses in QCD. The obtained results for the unobserved heavy baryons, with one (Qqq) and two (QQq) heavy quarks will be an excellent test for the capability of the sum rule approach in predicting their masses.
- Imprenta:
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ABNT
ALBUQUERQUE, Raphael Moreira de e NIELSEN, Marina e NARISON, Stephan. Estados exóticos do Charmonium. . São Paulo: Instituto de Física, Universidade de São Paulo. Disponível em: http://lanl.arxiv.org/pdf/1306.4671v1.pdf. Acesso em: 19 abr. 2024. , 2013 -
APA
Albuquerque, R. M. de, Nielsen, M., & Narison, S. (2013). Estados exóticos do Charmonium. São Paulo: Instituto de Física, Universidade de São Paulo. Recuperado de http://lanl.arxiv.org/pdf/1306.4671v1.pdf -
NLM
Albuquerque RM de, Nielsen M, Narison S. Estados exóticos do Charmonium [Internet]. 2013 ;[citado 2024 abr. 19 ] Available from: http://lanl.arxiv.org/pdf/1306.4671v1.pdf -
Vancouver
Albuquerque RM de, Nielsen M, Narison S. Estados exóticos do Charmonium [Internet]. 2013 ;[citado 2024 abr. 19 ] Available from: http://lanl.arxiv.org/pdf/1306.4671v1.pdf - Qcd sum rules for 'SIGMA' hyperons in nuclear matter
- The delta expansion and the principle of minimal sensitivity
- J/'psi'-kaon cross section in meson exchange model
- J/'psi'-kaon cross section in meson exchange model
- QCD sum rule approach to the new mesons and the 'gD IND.sJ'DK coupling constant
- `D IND.s´`D POT.*´ molecule as an axial meson
- New exotic charmonium states*
- Cromodinâmica Quântica QCD - 2
- Predicition for the decay width of a charged state near the DsD¯ ∗/D∗ sD¯ threshold
- QCD sum rule study for a possible charmed pentaquark Θc(3250)
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