نتایج جستجو برای: 1270
تعداد نتایج: 876 فیلتر نتایج به سال:
We study the inclusive strange axial-vector meson $K_1(1270)^+$ production in ${K^-}A$ reactions at near-threshold laboratory incident antikaon momenta within a nuclear spectral function approach, which describes incoherent direct $K^-$ meson--proton ${K^-}p \to {K_1(1270)^+}\Xi^-$ processes and accounts for three different options its in-medium mass shift (or effective scalar potential) centra...
A sample of 3.79 million ψ(2S) events is used to study the decays of charmonium to axialvector plus pseudoscalar mesons. The branching fraction for the decay ψ(2S) → b±1 (1235)π agrees with expectations based on scaling the corresponding J/ψ branching fraction. Flavor-SU(3)-violating K1(1270)K1(1400) asymmetries with opposite character for ψ(2S) and J/ψ decays are observed. This contrasting beh...
A correct understanding and description of the I = 2 ππ S-wave interaction is important for the extraction of the I = 0 ππ S-wave interaction from experimental data and for understanding the I = 0 ππ S-wave interaction theoretically. With t-channel ρ, f 2 (1270) exchange and the ππ → ρρ → ππ box diagram contribution, we reproduce the ππ isotensor S-wave and D-wave scattering phase shifts and in...
Using a sample of 58 million J/ψ events recorded in the BESII detector, the decay J/ψ → ωπ+π− is studied. There are conspicuous ωf2(1270) and b1(1235)π signals. At low ππ mass, a large broad peak due to the σ is observed, and its pole position is determined to be (541 ± 39) i (252 ± 42) MeV from the mean of six analyses. The errors are dominated by the systematic errors. PACS: 13.25.Gv, 14.40.G...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید