Electromagnetic properties of ${\bar{D}}^{(\ast )}{\Xi }_c^{\prime }$, ${\bar{D}}^{(\ast )}{\Lambda }_c$, ${\bar{D}}_s^{(\ast )}{\Lambda }_c$ and ${\bar{D}}_s^{(\ast )}{\Xi }_c$ pentaquarks

Abstract

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 ${\bar{D}}^{(\ast )}{\Xi }_c^{\prime }$, ${\bar{D}}^{(\ast )}{\Lambda }_c$, ${\bar{D}}_s^{(\ast )}{\Lambda }_c$ and ${\bar{D}}_s^{(\ast )}{\Xi }_c$ 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 ${\bar{D}}^{\ast }{\Xi }_c^{\prime }$, ${\bar{D}}^{\ast }{\Lambda }_c$, ${\bar{D}}_s^{\ast }{\Lambda }_c$ and ${\bar{D}}_s^{\ast }{\Xi }_c$ 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.

Comments: 20 pages, 3 tables and 2 figures. To be published in Physics Letters B