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pro vyhledávání: '"Riquer, V"'
Prompted by a recent lattice QCD calculation, we review the SU(3) light quark flavor structure of charmed tetraquarks with spin-0 diquarks. Fermi statistics forces the three light quarks to be in the representation 3*x3*= 3+6*. This agrees with the w
Externí odkaz:
http://arxiv.org/abs/2405.08545
Publikováno v:
Phys. Rev. D 100, 074002 (2019)
In this paper we present in greater detail previous work on the Born-Oppenheimer approximation to treat the hydrogen bond of QCD, and add a similar treatment of doubly heavy baryons. Doubly heavy exotic resonances X and Z can be described as color mo
Externí odkaz:
http://arxiv.org/abs/1908.03244
Publikováno v:
Phys. Rev. D 100, 014002 (2019)
Using the Born-Oppenheimer approximation, we show that exotic resonances, X and Z, may emerge as QCD molecular objects made of colored two-quark lumps, states with heavy-light diquarks spatially separated from antidiquarks. With the same method we co
Externí odkaz:
http://arxiv.org/abs/1903.10253
We introduce the hypothesis that diquarks and antidiquarks in tetraquarks are separated by a potential barrier. We show that this notion can answer satisfactorily long standing questions challenging the diquark-antidiquark model of exotic resonances.
Externí odkaz:
http://arxiv.org/abs/1712.05296
Autor:
Esposito, A., Grinstein, B., Maiani, L., Piccinini, F., Pilloni, A., Polosa, A. D., Riquer, V.
We briefly comment on the paper by Albaladejo et al. [arXiv:1709.09101], rejecting its conclusions.
Comment: This paper was prepared at the request of a journal editor. 3 Pages, no figures
Comment: This paper was prepared at the request of a journal editor. 3 Pages, no figures
Externí odkaz:
http://arxiv.org/abs/1709.09631
Publikováno v:
Phys. Rev. D 94, 054026 (2016)
We suggest that the J/psi phi structures observed by LHCb can be fitted in two tetraquak multiplets, the S-wave ground state and the first radial excitation, with composition [cs][cbar sbar]. When compared to the previously identified [cq][cbar qbar]
Externí odkaz:
http://arxiv.org/abs/1607.02405
Diquarks are found to have the right degrees of freedom to describe the tetraquark poles in hidden-charm to open-charm meson-meson amplitudes. Compact tetraquarks result as intermediate states in non-planar diagrams of the 1/N expansion and the corre
Externí odkaz:
http://arxiv.org/abs/1605.04839
Publikováno v:
Phys. Rev. D 94, 034036 (2016)
The recent observation by the D0 collaboration of a narrow structure X(5568) consisting of four different quark flavors bdus, has not been confirmed by LHCb. More data and dedicated analyses are needed to cover a larger mass range. In the tightly bou
Externí odkaz:
http://arxiv.org/abs/1604.01731
The observed Y(4260)\to \gamma + X(3872) decay is a natural consequence of the diquark-antidiquark description of Y and X resonances. In this note we attempt an estimate of the transition rate, \Gamma_{\rm rad}, by a non-relativistic calculation of t
Externí odkaz:
http://arxiv.org/abs/1510.03626
Pentaquarks and dibaryons are natural possibilities if diquarks are used as the building blocks to assemble hadrons. In this short note, motivated by the very recent discovery of two pentaquark states, we highlight some possible channels to search fo
Externí odkaz:
http://arxiv.org/abs/1508.04459