Dielectron production in p+Be and Ca+Ca collisions at the Bevalac
نویسندگان
چکیده
منابع مشابه
Dilepton production in proton-proton collisions at BEVALAC energies
The dilepton production in elementary pp → eeX reactions at BEVALAC energies Tlab = 1 ÷ 5 GeV is investigated. The calculations include direct ee decays of the vector mesons ρ, ω, and φ, Dalitz decays of the π, η-, ρ-, ω-, and φ-mesons, and of the baryon resonances ∆(1232), N(1520), . . . . The subthreshold vector meson production cross sections in pp collisions are treated in a way sufficient ...
متن کاملDielectron production in C+C and pp collisions
In 2004 the HADES collaboration concentrated on completing the first experimental proposal S262 focused on dielectron production in C+C and pp collisions. Two dedicated production runs using carbon and proton beams of 1 AGeV and 2.2 AGeV kinetic energy, respectively, were successfully conducted. Based on experiences gained in a first commissioning run using the liquid hydrogen target built at O...
متن کاملDielectron production in C+C and pp collisions
In the previous annual report [1], preliminary dielectron invariant-mass distributions from C+C collisions at 2 AGeV were reported on. Here we present results from a more refi ned data analysis using better detector calibrations and improved pair reconstruction algorithms. A comparison of the measured invariant-mass distribution to predictions of a thermal cocktail based on the PLUTO event gene...
متن کاملDielectron production in 12C+12C collisions at 2A GeV with the HADES spectrometer.
The invariant-mass spectrum of e+e- pairs produced in 12C+12C collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the pi(0)-Dalitz to the rho/omega invariant-mass region. Dalitz decays of pi(0) and eta account for all the yield up to 0.15 GeV/c(2), but for only about 50% above...
متن کاملDIELECTRON PRODUCTION IN PP AND DP COLLISIONS AT 1.25 GeV/u WITH HADES
Inclusive production of ee-pairs in pp and dp collisions at a kinetic beam energy of 1.25 GeV/u has been studied with the HADES spectrometer. In the latter case, the main goal was to obtain data on pair emission in quasi-free np collisions. To select this particular reaction channel the HADES experimental setup was extended with a Forward Wall hodoscope, which allowed to register spectator prot...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 1988
ISSN: 0375-9474
DOI: 10.1016/0375-9474(88)90283-7