Magnetic Rotation in \(^{60}\)Ni: A Semiclassical Description

Abstract

In this article, we construct the [sc] A [sc] V − [sc] V [sc] A-type tensor current to study the mass and width of the X(4274) with the QCD sum rules in detail. The predicted mass M X = (4.27 ± 0.09) GeV for the J P C = 1 ++ tetraquark state is in excellent agreement with the experimental data 4273.3 ± 8.3 +17.2 −3.6 MeV from the LHCb Collaboration. The central value of the width Γ (X(4274) → J/ψφ) = 47.9 MeV is in excellent agreement with the experimental data 56 ± 11 +8 −11 MeV from the LHCb Collaboration. The present work supports assigning the X(4274) to be the J P C = 1 ++ [sc] A [sc] V − [sc] V [sc] A tetraquark state with a relative P-wave between the diquark and antidiquark constituents. Furthermore, we obtain the mass of the [sc] A [sc] V − [sc] V [sc] A-type tetraquark state with J P C = 1 −+ as a byproduct.

Systematic study of magnetic and antimagnetic rotational bands

“…We have expanded the previous compilation of MR bands made by Amita et al in 2000 [36]. Up to now, 253 magnetic rotational bands in 123 nuclei have been reported in the A ∼ 60 [18,19,[37][38][39][40][41][42], 80 [16,, 110 [26,30,, 140 [13,17,, and 190 [6,7,20,35, mass regions. In contrast, the experimental observation of AMR bands is scarce and so far only 40 antimagnetic rotational bands are reported in 29 nuclei and mainly distributed in the A ∼ 60 [19,42,278], 110 [21, 23-26, 29-31, 40, 110, 112, 115, 119, 130, 279-313], and 140 [156,215,[314][315][316][317][318] In order to promote the study of magnetic and antimagnetic rotations, the systematics of MR and AMR bands are required.…”