Pentaquark magnetic moments in different models

Abstract

We calculate the magnetic moments of the pentaquark states from different models and compare our results with predictions of other groups.

Production of the Pentaquark Exotic Baryon $Xi_5$ in $bar{K}N$ Scattering: $bar{K}N o KXi_5$ and $bar{K}N o K^{*}Xi_5$

“…We see that the total cross sections are almost a hundred times smaller than that for the positive-parity Ξ 5 . The difference between the results of the two parities is even more pronounced than in the previously investigated reactions such as γN, KN and NN scattering [15,16,17,18,19,20,21,24,25,26,27,28,29,30], where typically the difference was about order of ten. In the present reaction, the interference between the s-and u-channels becomes important in addition to the kinematical effect in the p-wave coupling for the positive-parity (but not in the s-wave for the negative-parity), which is proportional to σ · q enhancing the amplitude at high momentum transfers.…”

“…The experimental observation of the Θ + performed by the LEPS collaboration at SPring-8 [1], which is motivated by Diakonov et al [2], have paved the way for intensive studies on the exotic five-quark baryon states, also known as pentaquarks, experimentally [3] as well as theoretically [2,4,5,6,7,8,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]. As a consequence of the finding of the Θ + , the existence of other pentaquark baryons such as the N 5 , Σ 5 and Ξ 5 , which have been also predicted theoretically, has been anticipated.…”

“…For example, the chiral soliton model [2,4], the diquark model [5], the chiral potential model [6], and constituent quark models with spin-flavor interactions [10,11,12] prefer the positive-parity for the Θ + , whereas the QCD sum rule approach [7,8] 1 and the quenched lattice QCD [13,14] have supported the negative-parity. In the meanwhile, various reactions for the Θ + production [15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30] has been investigated, where the determination of the parity of Θ + has been emphasized. In many cases, the total cross sections of the positive-parity Θ + production is typically about ten times larger than those of the negative-parity one.…”

Octet, decuplet, and antidecuplet magnetic moments in the chiral quark soliton model reexamined

“…The magnetic moments of the positive-parity pentaquarks have been studied by a number of authors in different models [26,27,28,29,30]. The results are displayed in Table V.…”

Pentaquark Masses and Magnetic Moments in a Quark Cluster Approach

“…Calculations for the magnetic moments of the spin 1 2 states using similar quark cluster models with other configurations (in particular for the models of [14], [15] and [16]) may be found in [26].…”