Zobrazeno 1 - 10
of 25
pro vyhledávání: '"A. C. M. Zanetti"'
Publikováno v:
Brazilian Journal of Physics. 50:363-371
We use the QCD sum rules for the three-point correlation functions to compute the strong coupling constants of the meson vertices $J/\psi D_{s}^{*} D_{s}^{*}$. Using the QCD sum rules, we obtain the form factor of the vertex, the coupling constant, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::596013917ffabd0945657c0fd8edbcd8
https://doi.org/10.1007/s13538-020-00744-z
https://doi.org/10.1007/s13538-020-00744-z
In this work we study the meson vertex $D_sDK^*$ using the QCD sum rules. We compute the three point correlation functions for the three cases of different off-shell mesons. The form factors for each case are fitted to the numerical calculation of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db55100d3d3c3f6884870a18cbc5628c
Publikováno v:
Nuclear Physics A. 966:208-223
We use the QCD sum rules for the three point correlation functions to compute the strong coupling constants of the meson vertices η c D ⁎ D and η c D s ⁎ D s . We consider perturbative and non-perturbative contributions, working up to dimension
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63378c4ae4a28952314701f36e059f0c
https://doi.org/10.1016/j.nuclphysa.2017.07.002
https://doi.org/10.1016/j.nuclphysa.2017.07.002
Publikováno v:
Physics Letters B. 758:235-238
To understand the nature of the X ( 5568 ) , recently observed in the mass spectrum of the B s 0 π ± system by the D0 Collaboration, we have investigated, in a previous work, a scalar tetraquark (diquak–antidiquark) structure for it, within the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1daf7094540293d2c73eb8661a2bb9d7
https://doi.org/10.1016/j.physletb.2016.05.015
https://doi.org/10.1016/j.physletb.2016.05.015
Autor:
Fernando S. Navarra, Jorgivan M. Dias, K. P. Khemchandani, C. M. Zanetti, R.M. Albuquerque, Marina Nielsen, A. Martínez Torres
In the past decade, due to the experimental observation of many charmonium-like states, there has been a revival of hadron spectroscopy. In particular, the experimental observation of charged charmonium-like, $Z_c$ states, and bottomonium-like, $Z_b$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::140b95678aa5fdcd93350f775c9d9569
Using the QCD sum rule approach we investigate the possible four-quark structure for the new observed $B_{s}^0\pi^\pm$ narrow structure (D0). We use a diquak-antidiquark scalar current and work to the order of $m_s$ in full QCD, without relying on $1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4665c523e442e531b3a9c64f527c06f8
http://arxiv.org/abs/1602.09041
http://arxiv.org/abs/1602.09041
Publikováno v:
International Journal of Modern Physics A. 23:151-165
Within a QCD-based eikonal model with a dynamical infrared gluon mass scale we discuss how the small $x$ behavior of the gluon distribution function at moderate $Q^{2}$ is directly related to the rise of total hadronic cross sections. In this model t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::723c0ccc62a512de873819f8d9a5d9a9
https://doi.org/10.1142/s0217751x08038019
https://doi.org/10.1142/s0217751x08038019
Publikováno v:
Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Using the QCD sum rules approach we study the mass and decay width of the channel $J/\psi + \omega$ for the $Y(3940)$ state. We assume that it can be described by a mixed charmonium-molecule scalar state, $(\chi_{c0})-(D^\ast D^\ast)$ current, with $
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::383313782b2a6d19fac356db509d3571
Publikováno v:
Physical Review D. 88
We identify the recently observed charmonium-like structure $Z_c^\pm(3900)$ as the charged partner of the X(3872) state. Using standard techniques of QCD sum rules, we evaluate the three-point function and extract the coupling constants of the $Z_c \
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::834152dc579719fa8ed677c6b0eafa31
https://doi.org/10.1103/physrevd.88.016004
https://doi.org/10.1103/physrevd.88.016004