ar X iv : n uc l - th / 0 51 00 17 v 1 4 O ct 2 00 5 1 – 6 COULOMB - SCATTERING AND η - η ′ MIXING ANGLE
نویسنده
چکیده
Our contribution to the Eta’05 workshop on “Production and Decay of η and η Mesons” (1518.9.2005, Cracow, Poland) is summarized. First we discuss open questions in the theoretical treatment of Coulomb-interaction in the context of reaction processes like pp → ppη. Then we review η-η and σ(600)-f0(980) mixing in the U(3)×U(3) Linear Sigma Model and extract information on η-η mixing and the K 0 (800) resonance from meson-meson scattering.
منابع مشابه
ar X iv : n uc l - th / 0 51 00 17 v 2 2 0 Fe b 20 06 1 – 8 COULOMB - SCATTERING AND η - η ′ MIXING ANGLE
The fascinating physics underlying η and η′ mesons can be studied theoretically and experimentally in various contexts. In this presentation we want to turn our attention to two important uncorrelated aspects of this vivid research field which provide yet unexpected challenges or surprises. First we discuss open questions in the theoretical treatment of Coulombinteraction in the context of reac...
متن کاملar X iv : n uc l - th / 0 50 70 24 v 1 8 J ul 2 00 5 Low - energy η N interactions : scattering lengths and resonance parameters
We consider the impact of two recent π − p → ηn measurements on the ηN scattering length and ηN branching fractions for the N (1535) and N (1520) resonances within a coupled-channel analysis of πN elastic scattering and ηN production data. The sensitivity of these results to model input is also explored.
متن کاملar X iv : 0 91 0 . 02 00 v 1 [ he p - ph ] 1 O ct 2 00 9 Cusps in η ′ → ηππ decays
The discovery of the cusp effect in the decay K+ → π+π0π0 has spurred the search for other decay channels, where this phenomenon, which is generated by strong final-state interactions, should also occur. A very promising candidate is η ′ → ηπ0π0. The cusp effect offers an excellent opportunity to experimentally extract ππ S-Wave scattering lengths. We adapt and generalize the non-relativistic e...
متن کاملar X iv : h ep - p h / 05 07 02 4 v 1 2 J ul 2 00 5 η bound states in nuclei : a probe of flavour - singlet dynamics
Measurements of the pion, kaon and eta meson masses and their interactions in finite nuclei provide new constraints on our understanding of dynamical symmetry breaking in low energy QCD [1]. New experiments at the GSI will employ the recoilless (d, He) reaction to study the possible formation of η meson bound states inside the nucleus [2], following on from the successful studies of pionic atom...
متن کاملar X iv : h ep - p h / 94 10 30 4 v 2 1 8 O ct 1 99 4 WU B 94 - 28 MESON - PHOTON TRANSITION FORM FACTORS
We report results on the π-γ transition form factor obtained within the hard scattering approach including transverse momentum effects and Sudakov corrections. The results clearly favor distribution amplitudes close to the asymp-totic form, ∼ x 1 x 2 , and disfavor distribution amplitudes which are strongly concentrated in the end-point regions. This observation is backed by information on the ...
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 2005