Production of the $η_{1}(1855)$ through kaon induced reactions under the assumptions that it is a molecular or a hybrid state

Abstract

By the reaction of kaon interacting with a proton, we investigate the production of the newly observed η 1 (1855) and its C-parity partner η ′ 1 (1855) predicted in the picture of the K K1 (1400) molecular state. The total and differential cross sections of the concrete K − p → η 1 (1855)Λ and η ′ 1 (1855)Λ reactions are obtained. At the center of mass energies about 3.4∼3.6 GeV, the minimum cross-section of η 1 (1855) and and η ′ 1 (1855) production via the K − p reaction are about 0.59 nb and 19.2 nb, respectively. The differential cross sections for both reactions at the different center of mass energies are also available. Furthermore, we present the Dalitz processes of 2 → 3 and 2 → 4, and initially discuss the feasibility of finding out the η 1 (1855) and η ′ 1 (1855) in experiments like J-PARC.

Light double-gluon hybrid states with the exotic quantum numbers $J^{PC} = 1^{-+}$ and $3^{-+}$

“…However, their nature is still elusive due to our poor understanding of the gluon degree of freedom [38][39][40][41][42][43][44][45][46][47][48][49]. Besides, these states can also be interpreted as the compact tetraquarks and hadronic molecules [50][51][52][53][54][55][56][57][58].…”