Lifting problem of {$\eta$} and Mahowald's element {$\eta\sb j$}

Lifting Problem in Codimension 2 and Initial Ideals

the problem of divine hiddenness

این رساله به مساله احتجاب الهی و مشکلات برهان مبتنی بر این مساله میپردازد. مساله احتجاب الهی مساله ای به قدمت ادیان است که به طور خاصی در مورد ادیان ابراهیمی اهمیت پیدا میکند. در ادیان ابراهیمی با توجه به تعالی خداوند و در عین حال خالقیت و حضور او و سخن گفتن و ارتباط شهودی او با بعضی از انسانهای ساکن زمین مساله ای پدید میاید با پرسشهایی از قبیل اینکه چرا ارتباط مستقیم ویا حداقل ارتباط وافی به ب...

Measurement of the eta'-meson mass using J/psi-->gammaeta'.

We measure the mass of the eta;{'} meson using psi(2S)-->pi;{+}pi;{-}J/psi, J/psi-->gammaeta;{'} events acquired with the CLEO-c detector operating at the CESR e;{+}e;{-} collider. Using three decay modes, eta;{'}-->rho;{0}gamma, eta;{'}-->pi;{+}pi;{-}eta with eta-->gammagamma, and eta;{'}-->pi;{+}pi;{-}eta with eta-->pi;{+}pi;{-}pi;{0}, we find M_{eta;{'}}=957.793+/-0.054+/-0.036 MeV, in which...

Warm inflation solution to the eta-problem

Warm inflationary dynamics is shown to satisfy both the slow-roll and density perturbation constraints for mφ ≫ H or equivalently η ≫ 1 and for inflaton field amplitudes much below the Planck scale, 〈φ〉 < mpl. I start by reviewing the two types of inflation dynamics, isentropic or cold inflation and nonisentropic or warm inflation. In the former, inflation occurs without radiation production, w...

Eta and Eta’ Physics

This talk describes the reasons why η and η decays are an interesting topic of study for both theory and experiment. The main part discusses the results of the recent calculation of η → 3π at two-loop order in ChPT. Some puzzling aspects of the results compared to earlier dispersive calculations are highlighted. I also like to remind the reader of the use of η and η decays for studying the anom...