Spectral redshift versus broadening from photon and dilepton spectra
نویسندگان
چکیده
منابع مشابه
Dilepton and Photon Productions from a Coherent Pion Oscillation
Since the electromagnetic current for a pion system coincides with the third component of the isovector current, the isospin angular oscillation of a coherent field can be a significant source for the electromagnetic emissions. We study the characteristic dilepton and photon emissions from the classical pion field oscillation in the QCD vacuum. The general analytical solution obtained in the no...
متن کاملρ meson broadening and dilepton production in heavy ion collisions ∗
The measurement and calculation of dilepton and photon emission in heavy ion collisions represent great interest from a theoretical point of view. Once the radiation is formed, it can propagate virtually unscathed to the detectors, owing to the smallness of the fine structure constant α. This signal is also sensitive to the hot and dense phase of the nuclear reaction. This can only be probed in...
متن کاملCharm Estimate from the Dilepton Spectra in Nuclear Collisions
A validity of a recent estimate of an upper limit of charm production in central Pb+Pb collisions at 158 A·GeV is critically discussed. Within a simple model we study properties of the background subtraction procedure used for an extraction of the charm signal from the analysis of dilepton spectra. We demonstrate that a production asymmetry between positively and negatively charged background m...
متن کاملBackground Subtraction from the Dilepton Spectra in Nuclear Collisions
Properties of the background subtraction procedure commonly used for the analysis of dilepton spectra are discussed within a simple model. It is shown that a production asymmetry between positive and negative background muons and a large multiplicity of signal pairs will lead to biased results. Therefore the applicability of this procedure for the analysis of nucleus–nucleus data should be reco...
متن کاملDilepton Spectra from Decays of Light Unflavored Mesons
The invariant mass spectrum of the e+e− and μ+μ− pairs from decays of light unflavored mesons with masses below the φ(1020)-meson mass to final states containing along with a dilepton pair one photon, one meson, and two mesons are calculated within the framework of the effective meson theory. The results can be used for simulations of the dilepton spectra in heavy-ion collisions and for experim...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review C
سال: 2003
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.67.054901