Subthreshold pion dynamics as a source for hard photons beyond proton-neutron Bremsstrahlung in heavy-ion collisions.
نویسندگان
چکیده
We report on the study of extremely high energy photons, pions and etas, produced in intermediate energy heavy-ion collisions. Possibility of imaging the final-state phase space in these collisions by the BoseEinstein correlations for photons is critically examined. Invited talk given at the NATO Advanced Research Workshop on the Structure of Mesons, Baryons and Nuclei, Krakow (Poland), May 26 30, 1998
منابع مشابه
Seeing phi meson through the dilepton spectra in heavy-ion collisions
Dilepton spectra from the decay of phi mesons produced in heavy-ion collisions at SIS/GSI energies (∼ 2 GeV/nucleon) are studied in the relativistic transport model. We include phi mesons produced from baryon-baryon, pion-baryon, and kaon-antikaon collisions. The cross sections for the first two processes are obtained from an one-boson-exchange model, while that for the last process is taken to...
متن کاملHard Photons and Neutral Pions Radiated from Colliding Nuclei
A comparison of direct photon emission to pion production observed from nucleus-nucleus collisions in the Fermi energy domain shows some very interesting features. Valuable information is gained through the fit of a standard black body radiation formula to the data as well as by a comparison to classical bremsstrahlung theory. A production in the early phase of the collision is indicated. Radia...
متن کاملIsospin Physics in Heavy-ion Collisions at Intermediate Energies
In nuclear collisions induced by stable or radioactive neutron-rich nuclei a transient state of nuclear matter with an appreciable isospin asymmetry as well as thermal and compressional excitation can be created. This offers the possibility to study the properties of nuclear matter in the region between symmetric nuclear matter and pure neutron matter. In this review, we discuss recent theoreti...
متن کاملBremsstrahlung Dileptons in Ultra-relativistic Heavy Ion Collisions
We consider production of dilepton pairs through coherent electro-magnetic radiation during nuclear collisions. We show that the number of pairs produced through bremsstrahlung is about two orders of magnitude smaller than the yield measured by the CERES collaboration. Therefore, coherent bremsstrahlung can be ruled out as an explanation for the observed enhancement of low mass dileptons in CER...
متن کاملN ov 2 00 0 Bremsstrahlung from a Microscopic Model of Relativistic Heavy Ion Collisions
We compute bremsstrahlung arising from the acceleration of individual charged baryons and mesons during the time evolution of high-energy Au+Au collisions at the Relativistic Heavy Ion Collider using a microscopic transport model. We elucidate the connection between bremsstrahlung and charge stopping by colliding artificial pure proton on pure neutron nuclei. From the intensity of low energy br...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 76 14 شماره
صفحات -
تاریخ انتشار 1996