0 Quantum interference in the e + e − decays of ρ 0 and ω - mesons produced in π − p reactions
نویسنده
چکیده
The study of the π−p → ρn and π−p → ωn amplitudes close and below the vector meson production threshold (1.2 < √ s < 1.8 GeV) reveals a rich dynamics arising from the presence of specific baryon resonances in this energy range. The interference pattern of the ee decays of the ρand ω-mesons produced in π−p reactions reflects directly this dynamics. We discuss this interference pattern in the π−p → een reaction as function of the total center of mass energy √ s. We emphasize the importance of an experimental study of this reaction, which could be made with the HADES detector and the available pion beam at GSI.
منابع مشابه
Rho - Omega Mixing and Direct CP Violation in Hadronic B - Decays S . Gardner
We study direct CP violation in hadronic B-decays in the ρ 0-ω interference region, and focus specifically on the rate asymmetry in B ± → ρ ± ρ 0 (ω) → ρ ± π + π −. In this channel, the strong phase is dominated by isospin violation, so that it can be essentially determined by e + e − → π + π − data in the ρ 0-ω interference region. We find that the asymmetry in the ρ ± π + π − channel is of or...
متن کاملDirect CP violation in B → ρ 0 ( ω ) PS
We calculate the direct CP violating asymmetry parameter, a CP , for B → π + π − π and B → π + π − K decays, in the case where ρ 0 − ω mixing effects are taken into account. We find that the direct CP asymmetry for B − → π + π − π − , ¯ B 0 → π + π − π 0 , B − → π + π − K − and ¯ B 0 → π + π − ¯ K 0 , reaches its maximum when the invariant mass π + π − is in the vicinity of the ω meson mass. Th...
متن کاملar X iv : h ep - p h / 01 01 02 4 v 1 3 J an 2 00 1 Interference pattern analysis in the decays φ → γπη and φ → γπ 0 π 0
Interference pattern analysis in the decays φ → γπη and φ → γπ 0 π 0. Abstract We analyse the interference patterns in the reactions φ → (γa 0 + π 0 ρ) → γπη and φ → (γf 0 +π 0 ρ) → γπ 0 π 0. Taking into account the interference, we fit the experimental data and show that the background reaction does not distort the π 0 η spectrum in the decay φ → γπη everywhere over the energy region and does ...
متن کامل2 00 1 Analysis of the nature of the φ → γπη and φ → γπ 0 π 0 decays
Analysis of the nature of the φ → γπη and φ → γπ 0 π 0 decays. Abstract We study interference patterns in the φ → (γa 0 + π 0 ρ) → γπη and φ → (γf 0 + π 0 ρ) → γπ 0 π 0 reactions. Taking into account the interference, we fit the experimental data and show that the background reaction does not distort the π 0 η spectrum in the decay φ → γπη everywhere over the energy region and does not distort ...
متن کامل/ 00 05 05 9 v 1 6 M ay 2 00 0 ω − ρ Mixing and the ω → ππγ Decay
We reexamine the ω → π0 π0 γ decay, adding the effect of ω−ρ mixing to the amplitude calculated with the aid of chiral perturbation theory and vector meson dominance. We predict the neutral decay to occur with a width of Γ(ω → π0 π0 γ ) = (323 ± 80)eV and also analyze the effect of the ω − ρ mixing on the Γ(ω → π0 π0 γ )/Γ(ω → π+ π γ ) ratio. Several remarks on the effect of ω − ρ mixing on cer...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000