Hidden charm pentaquarks: mass spectrum, magnetic moments and photocouplings
نویسندگان
چکیده
منابع مشابه
Identifying Exotic Hidden-Charm Pentaquarks.
The LHCb Collaboration at the Large Hadron Collider at CERN discovered two pentaquark states P_{c}(4380) and P_{c}(4450). These two hidden-charm states are interpreted as the loosely bound Σ_{c}(2455)D^{*} and Σ_{c}^{*}(2520)D^{*} molecular states in the boson exchange interaction model, which provides an explanation for why the experimental width of P_{c}(4450) is much narrower than that of P_...
متن کاملTowards Exotic Hidden-Charm Pentaquarks in QCD.
Inspired by P(c)(4380) and P(c)(4450) recently observed by LHCb, a QCD sum rule investigation is performed, by which they can be identified as exotic hidden-charm pentaquarks composed of an anticharmed meson and a charmed baryon. Our results suggest that P(c)(4380) and P(c)(4450) have quantum numbers J(P)=3/2(-) and 5/2(+), respectively. Furthermore, two extra hidden-charm pentaqurks with confi...
متن کاملMagnetic moments of antidecuplet pentaquarks
We analyze the magnetic moments of the exotic pentaquarks of the flavor antidecuplet in the constituent quark model for the case in which the ground state is in an orbital L = 0 or a L = 1− state. We derive sum rules for the magnetic moments. The magnetic moment of the Θ(1540) is found to be 0.38, 0.09 and 1.05 μN for J p = 1/2−, 1/2 and 3/2, respectively, which is compared with the results obt...
متن کاملMass spectrum of pentaquarks
We discuss the properties of the pentaquark in a collective stringlike model with a nonplanar configuration of the four quarks and the antiquark. In an application to the mass spectrum of exotic Θ baryons, we find that the ground state pentaquark has angular momentum and parity J = 1/2− and a small magnetic moment of 0.382 μN . The decay width is suppressed by the spatial overlap with the decay...
متن کاملMasses and magnetic moments of pentaquarks
We discuss the spectroscopy of the recently discovered exotic baryons as pentaquark qq̄ configurations. The ground state pentaquark configuration depends on the interplay between spin-flavor and orbital contributions to the mass operator. A simple calculation in an algebraic model gives a ground state antidecuplet pentaquark with isospin I = 0 and negative parity. The lowest pentaquark with posi...
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ژورنال
عنوان ژورنال: Journal of Physics G: Nuclear and Particle Physics
سال: 2019
ISSN: 0954-3899,1361-6471
DOI: 10.1088/1361-6471/ab096d