The recent Auger results suggest that although coincidences of arrival directions with ’nearby’ AGN and HiRes discovery of the GZK cut-off indicate protons, the measured longitudinal propagation characteristics indicate heavy nuclei, if the conventional interaction model is correct. Something has to change! Our own view is that it is possible that the AGN -implied proton identification is not c...

With Baikal and AMANDA detectors UHE neutrino astronomy entered its first stage, which will reach the decisive level with 1 km detector. Simultaneously, the first steps are made in building the detectors searching for superGZK neutrinos, i.e. those with energies above the GZK cutoff, EGZK ∼ 5 × 10 19 eV. Radio-telescopes, such as RICE, GLUE and FORTE are already searching for radio signal from ...

Higher twist corrections to hadronic interactions become increasingly important at high energies. An effective way to resum all these contributions is the color glass condensate picture. We review the Kharzeev-Levin-Nardi (KLN)[1] approach to heavy ion collisions, which has successfully been applied to RHIC physics, and extrapolate this model to Iron-air collisions at energies up to the GZK (≈ ...

Kinematics in Finsler space is used to study the propagation of ultra high energy cosmic rays particles through the cosmic microwave background radiation. We find that the GZK threshold is lifted dramatically in Randers-Finsler space. A tiny deformation of spacetime from Minkowskian to Finslerian allows more ultra-high energy cosmic rays particles arrive at the earth. It is suggested that the l...

نظرا للإقبال الشديد و المتزايد لممارسة لعبة کرة السلة 3×3 منذ انطلاق أول حدث رسمي لبطولة عام 2010 في دورة الألعاب الأوليمبية للشباب الذي جعل منها محط اهتمام من الدول الأعضاء الاتحاد الدولي لکرة أصبح الضروري إعداد لاعبين يتميزوا بسرعة إيقاع اللعب إلى جانب امتلاکهم للعديد المهارات الهجومية التي تؤهلهم لخوض تلک المنافسات المتنوعة المستمرة الأمر أدى بدوره ضرورة دراسة تناولت الدراسة تحليل مجموعة مبا...

Faraday rotation measurements are used to constrain simple models representing possible extremes of the structure of extra-galactic magnetic fields (EGMFs). Relevant fields are found quite generally to be at the μG level rather than the nG level usually assumed. Even the highest energy cosmic ray protons should experience large deflections over distances of order 1 Mpc. Such large deflections a...

We discuss design considerations and simulation results for IceRay, a proposed large-scale ultra-high energy (UHE) neutrino detector at the South Pole. The array is designed to detect the coherent Askaryan radio emission from UHE neutrino interactions in the ice, with the goal of detecting the cosmogenic neutrino flux with reasonable event rates. Operating in coincidence with the IceCube neutri...

Gamma-ray bursts are the brightest transient sources of MeV γ-rays in the sky and are the leading candidate sources of the GZK cosmic rays. Physical conditions required to accelerate elementary particles to such high energies also, inevitably, lead to expected TeV energy γ-ray and neutrino emission from these sources. Although γ-rays of energy only up to 18 GeV have been detected from a few bur...

It is shown that an instanton induced interaction between quarks produces a very deeply bound H-dibaryon with mass below 2M N , M H = 1718 MeV. Therefore the H-dibaryon is predicted to be a stable particle. The reaction of photodisintegration of H-dibaryon to 2Λ in during of its penetration into cosmic microwave background will result in a new possible cutoff in the cosmic-ray spectrum. This pr...

It is shown that instanton induced interaction between quarks produces a very deeply bound H-dibaryon with mass below 2M N , M H = 1718 MeV. Therefore the H-dibaryon is predicted to be a stable particle. The reaction of photodisintegration of H-dibaryon to 2Λ in during of its penetration into cosmic microwave background will result in a new possible cutoff in the cosmic-ray spectrum. This provi...