Study of the ω meson family and newly observed ω -like state X(2240)

Abstract

Since the present ω meson family has not been established, in this work we carry out an investigation of the mass spectrum and Okubo-Zweig-Iizuka allowed a two-body strong decay of the S-wave and the D-wave ω mesons, and make the comparison with the experimental data of these reported ω states and the ω-like Xð2240Þ state observed by BESIII. By this study, we not only suggest the possible assignments to these observed ω states under the framework of the ω meson family, but also predict three ω mesons [ωð5SÞ, ωð2DÞ, and ωð4DÞ which are still missing in experiment. The present study may provide valuable information to further construct the ω meson family. Considering the present running status of BESIII, we also suggest that BESIII should pay more attention to the issue of the ω meson by accumulating more data.

Possible Assignment of Excited Light $^3S_1$ Vector Mesons

“…In addition, the resonance is clearly visible in the b 1 π channel in the experiment [15], as expected from our calculation. With the fact that it couples to 3 D 1 , we cannot preclude the possibility of 2 3 D 1 being assigned, as has been visualized in an explicit calculation [21]. However, the ωη data do produce the best determination of the 1 −− resonance at 1960 MeV [15], challenging our tiny branching ratio of the ωη model.…”

“…If the data do not fit our simple model well, we also provide some possible explanations for this phenomenon, in addition to the exotic state. Several recent works on vector meson assignment focus mainly on one family [20][21][22][23]; therefore, we want to present some new insights from the aspect of the nonet.…”

Inflation, electroweak phase transition, and Higgs searches at the LHC in the two-Higgs-doublet model

“…The EWPT in the 2HDM has been extensively studied in the Refs. [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”

Toward e+e−→π+π−Wei1, Wang2, Liu3 2020Phys. Rev. DSelf Cite160110View full textAdd to dashboardCite

“…Generally, light vector mesons can be grouped into isovector ρ meson family, isoscalar ω and ϕ meson families. If checking the mass spectrum of light vector meson [5][6][7], we may find that some higher ρ, ω, and ϕ states accumulate around 2 GeV mass range, which may result in the difficulty of distinguishing them when analyzing some annihilation processes of e þ e − into light mesons. It is obvious that the pollution from ω and ϕ mesons can be avoided for e þ e − → π þ π − , which is the reason why we are dedicated to the study of e þ e − → π þ π − by combing with higher ρ mesons around 2 GeV.…”