Search

We perform a systematic study of the electromagnetic properties of exotic states to shed light on their nature, which is still controversial and not fully understood. The magnetic dipole and higher multipole moments of a hadronic state are as fundamental a dynamical quantity as its mass, and they contain valuable information about the deep structure underlying it. In the present work, we have explored the magnetic dipole and higher multipole moments of the hidden-charm pentaquarks with quantum number J P = 3 / 2 − using the QCD light-cone sum rule method and different interpolating currents. The obtained results show that different interpolating currents employed to probe pentaquarks with the same quark content produce varying results for their magnetic dipole and higher multipole moments at all. This can be interpreted to mean that there is more than one hidden-charm pentaquark with identical quark content but with different magnetic dipole and higher multipole moments. The nature, internal structure, and quark-gluon configurations of these states can be better understood by studying their electromagnetic properties. [ABSTRACT FROM AUTHOR]

In this work, we employ the light-cone QCD sum rule to calculate the magnetic dipole moments of the P c (4440) , P c (4457) and P cs (4459) pentaquark states by considering them as the diquark–diquark–antiquark and molecular pictures with quantum numbers J P = 3 2 - , J P = 1 2 - and J P = 1 2 - , respectively. In the analyses, we use the diquark–diquark–antiquark and molecular form of interpolating currents, and photon distribution amplitudes to obtain the magnetic dipole moment of pentaquark states. Theoretical examinations on magnetic dipole moments of the hidden-charm pentaquark states, are essential as their results can help us better figure out their substructure and the dynamics of the QCD as the theory of the strong interaction. As a by product, we extract the electric quadrupole and magnetic octupole moments of the P c (4440) pentaquark. These values show a non-spherical charge distribution. [ABSTRACT FROM AUTHOR]

Employing light-cone QCD sum rule, we have acquired the magnetic moment of the Zc(3900) resonance by considering it as the molecular form of * DD and * D Dresonance with quantum numbers JPC = 1+-. The magnetic moment contains crucial knowledge about the internal organization of particles and their geometric configuration. Measurement of the magnetic moment of the Zc(3900) resonance in future experiments can be quite useful comprehension the inner organization of exotic resonances. A comparison of our numerical values on the magnetic moment with those estimated by the other theoretical models existing in literature is carried out. [ABSTRACT FROM AUTHOR]

To elucidate the internal structure of exotic states is one of the central purposes of hadron physics. Motivated by this, we study the electromagnetic properties of D ¯ (⁎) Ξ c ′ , D ¯ (⁎) Λ c , D ¯ s (⁎) Λ c and D ¯ s (⁎) Ξ c pentaquarks without strange, with strange and with double strange through QCD light-cone sum rules. We have also evaluated electric quadrupole and magnetic octupole moments of the D ¯ ⁎ Ξ c ′ , D ¯ ⁎ Λ c , D ¯ s ⁎ Λ c and D ¯ s ⁎ Ξ c pentaquarks. The magnetic dipole moment is the leading-order response of a bound system to a soft external magnetic field. Thus, it ensures a prominent platform for the examination of the internal organizations of hadrons governed by the quark-gluon dynamics of QCD. We look forward to the present study stimulating the interest of experimentalists in investigating the electromagnetic properties of the hidden-charm pentaquarks. [ABSTRACT FROM AUTHOR]

In this study, we use the molecular and diquark-antidiquark tetraquark pictures to investigate magnetic and quadrupole moments of the B c -like ground state tetraquarks with the QCD light-cone sum rules with quantum numbers J P = 1 +. In the numerical analysis, to obtain the magnetic and quadrupole moments of B c -like tetraquark states molecular and diquark-antidiquark forms of interpolating currents, and photon distribution amplitudes have been used. The magnetic moments are acquired as μ Z u c u ¯ b ¯ M o l = 1.18 − 0.40 + 0.52 μ N , μ Z u c u ¯ b ¯ D i = 3.05 − 0.95 + 1.19 μ N , μ Z d c d ¯ b ¯ M o l = 0.32 − 0.10 + 0.18 μ N , and μ Z d c d ¯ b ¯ D i = 2.38 − 0.75 + 0.95 μ N. The hadrons' magnetic and quadrupole moments are another fundamental observable as their mass, which provides information on the underlying quark structure and dynamics. The results obtained in both pictures are quite different from each other. Any experimental measurement of the magnetic moments can provide an understanding of the internal structure of these states. We get nonzero but small values for the quadrupole moments of B c -like tetraquark states showing non-spherical charge distributions. Hopefully, the examinations given in this study will be helpful to an experimental search of them, which will be an interesting research subject. [ABSTRACT FROM AUTHOR]

In this study, we discuss the magnetic moment of P c s (4338) and P c s (4459) hidden-charmed pentaquarks, which are closely related to their substructures. The magnetic moments of these states are calculated with the help of the QCD light-cone sum rules method with quantum numbers I (J P) = 0 (1 / 2 −) and I (J P) = 0 (3 / 2 −) for P c s (4338) and P c s (4459) , respectively. Our predictions for the magnetic moment μ P c s = 0.34 ± 0.12 μ N for the P c s (4338) state, and μ P c s = − 1.67 ± 0.58 μ N for the P c s (4459) state. As a by-product, the magnetic moments of the isospin−1 partners of these states have also been obtained. The magnetic moments are obtained as μ P c s = 0.63 ± 0.21 μ N and μ P c s = − 3.33 ± 1.04 μ N for the isospin-1 partners of the P c s (4338) and P c s (4459) states, respectively. Our results regarding the magnetic moments of these color singlet-singlet type pentaquark states are compared with the results in the literature. [ABSTRACT FROM AUTHOR]