Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Polosa, Antonio D."'
Publikováno v:
Eur. Phys. J. C 84, 755 (2024)
We describe pentaquarks as baryo-charmonia with a color octet $c\bar{c}$ core bonded to a color octet three-quark system. Fermi statistics of the light quark cloud allows to describe two pentaquark triplets: a lower one, well supported by experiment,
Externí odkaz:
http://arxiv.org/abs/2403.04068
Autor:
Esposito, Angelo, Germani, Davide, Glioti, Alfredo, Polosa, Antonio D., Rattazzi, Riccardo, Tarquini, Michele
Publikováno v:
Phys.Lett.B 847 (2023) 138285
We determine the contribution of long-range pion interactions to the $X(3872)$ dynamics, assuming it is a loosely bound $D^0 \bar{D}^{*0}$ molecule. Our result is based on the distorted wave Born approximation in non-relativistic quantum mechanics. D
Externí odkaz:
http://arxiv.org/abs/2307.11400
We study compact hidden charm pentaquarks in the Born-Oppenheimer approximation, previously introduced for tetraquarks, assuming the heavy pair to be in a color octet. We show that Fermi statistics applied to the complex of the three light quarks, al
Externí odkaz:
http://arxiv.org/abs/2303.04056
Tetraquarks QQq*q* are found to be described remarkably well with the Quantum Chromodynamics version of the Hydrogen bond, as treated with the Born-Oppenheimer approximation. We show the robustness of the method by computing the mass of the observed
Externí odkaz:
http://arxiv.org/abs/2208.02730
From a study of the lineshape of the $X(3872)$, the LHCb collaboration measures a sizeable negative effective range. This cannot be reconciled with a shallow $D\bar{D}^*$ bound state hypothesis. Based on Weinberg's compositeness criterion, together w
Externí odkaz:
http://arxiv.org/abs/2108.11413
The charmonium-like exotic states $Y(4230)$ and the less known $Y(4320)$, produced in $e^+e^-$ collisions, are sources of positive parity exotic hadrons in association with photons or pseudoscalar mesons. We analyze the radiative and pion decay chann
Externí odkaz:
http://arxiv.org/abs/2103.14356
New data from BESIII and LHCb show the existence of resonances with strangeness filling multiplets of the broken SU(3)_f symmetry, with the pattern predicted by the quark model. This is the case of the newly discovered Z_{cs} (3985) and Z_{cs}(4003),
Externí odkaz:
http://arxiv.org/abs/2103.08331
Publikováno v:
Phys. Rev. D 103, 055017 (2021)
We present the analysis of a new signature for light dark matter detection with superfluid $^4$He: the emission of three phonons. We show that, in a region of mass below the MeV, the kinematics of this process can offer a way to reconstruct the dark
Externí odkaz:
http://arxiv.org/abs/2012.01432
Autor:
Esposito, Angelo, Ferreiro, Elena G., Pilloni, Alessandro, Polosa, Antonio D., Salgado, Carlos A.
Publikováno v:
Eur. Phys. J. C 81, 669 (2021)
The structure of exotic resonances that do not trivially fit the usual quark model expectations has been a matter of intense scientific debate during the last two decades. A possible way of estimating the size of these states is to study their behavi
Externí odkaz:
http://arxiv.org/abs/2006.15044
Publikováno v:
Phys. Rev. D 102, 034017 (2020)
We discuss how the latest data on X(3872) in B and B_s decays speak about its tetraquark nature. The established decay pattern, including the up to date observations by CMS, are explained by the mixing of two quasi-degenerate, unresolvable, neutral s
Externí odkaz:
http://arxiv.org/abs/2005.08764