Investigations on the charmless decays of Y(4260)

Abstract

Apart from the charmful decay channels of Y (4260), the charmless decay channels of Y (4260) also provide us a good platform to study the nature and the decay mechanism of Y (4260). In this paper, we propose to probe the structure of Y (4260) through the charmless decays Y (4260) → V P via intermediate D1D+c.c. meson loops, where V and P stand for light vector and pseudoscalar mesons, respectively. Under the molecule ansatz of Y (4260), the predicted total branching ratio BRV P for all Y (4260) → V P processes are about (0.34 +0.32 −0.23 )% to (0.75 +0.72 −0.52 )% with the cutoff parameter α = 2 ∼ 3. Numerical results show that the intermediate D1D +c.c. meson loops may be a possible transition mechanism in the Y (4260) → V P decays. These predicted branching ratios are the same order to that of Y (4260) → Z + c (3900)π − , which may be an evidence of D1D molecule and can be examined by the forthcoming BESIII data in the near future.

The hidden-charm pentaquark and tetraquark states

“…Assuming the Y(4260) to be a D 1 (2420)D molecular state, its hidden-charm, charmed pair, and charmless decay channels were studied via the intermediate D 1D meson loops with an effective Lagrangian approach in Refs. [766,767], while, its strong decay modes Z c (3900) ± π ∓ , J/ψπ + π − , and ψ(nS )π + π − , were studied in Ref. [768].…”

Seismogenic tectonics of the Qian-Gorlos earthquake in Jilin Province, China

“…Therefore, the shape of the fold edge was formed in the Quaternary and should still be present. The terrain scarps seen at the surface were not completely the same as those that Li et al (1999b) thought were formed by erosion. The formation of this fold is a very useful piece of information.…”

“…Li et al (1999b) proposed that these outcrops were a result of landslides. The distribution of the faults was not given.…”

“…Oil exploration data were used to investigate the existence of other possible epicenters. Our work differs from that of Li et al (1999b) and Zhou and Gao (1992) in that we carried out not only more detailed geological and landform survey work, but also used information from geophysical exploration and boreholes. Reliable evidence showing the position, attributes, and characteristics of the seismogenic tectonics were acquired.…”

Simultaneous separation of three isomeric sennosides from senna leaf (Cassia acutifolia) using counter‐current chromatography

“…When separating structurally isomeric compounds by CCC, chiral selectors were added [17][18][19] but their solubility in the solvents should be carefully considered because it directly affects loadability [20]. pH modulation can also be employed for the effective isomeric separation and pHzone-refining is one of strategies [21,22] for the large-scale preparative CCC.…”