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Baryon number cumulants and proton number cumulants in relativistic heavy ion collisions

100%
Asakawa M.
Open Physics
|
2012
|
vol. 10
|
issue 6
1314-1317
EN
Baryon number cumulants are invaluable tools to diagnose the primordial stage of heavy ion collisions. In experiments, however, proton number cumulants have been measured as substitutes. In fact, proton number fluctuations are further modified in the hadron phase and different from those of baryon number. We give formulas that express the baryon number cumulants solely in terms of proton number fluctuations, which are experimentally observable.
2
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Radiative spectra of thermal electromagnetic noise induced by planar realistic dielectrics

88%
Dorofeyev I., Fuchs H., Sobakinskaya K.
Open Physics
|
2005
|
vol. 3
|
issue 3
351-375
EN
Spectral characteristics of stochastic fields and their spatial derivatives in various planar structures composed by lossy materials described by realistic dielectric functions are numerically calculated based on solutions to the problems of multipolar electromagnetic fields in a plane layered geometry. A displacement of the maximum of the spectral power densities for spatial derivatives of fluctuating fields to the high-frequency domain, a resonant increase in the density of states of the fluctuating fields at the frequencies of interface excitations and interference modes for the radiative part of the spectra, the influence of geometry on the density of states, and other peculiarities are found by numerical calculations and graphically demonstrated. Interpretations of the above effects are provided.
3
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Finite-size behaviour of a critical related observable

88%
Yuanfang W., Lizhu C., Xue P., Ming S., Chen X.
Open Physics
|
2012
|
vol. 10
|
issue 6
1341-1344
EN
Accounting for the influence of system size in relativistic heavy ion collisions, the finite-size form of a critical related observable is suggested. The fixed-point and straight line methods are proposed in exploring the QCD critical point and phase boundary in relativistic heavy ion collisions. As an application, the finitesize behaviour of the ratios of higher net-proton cumulants, dynamical electric charge fluctuations, and transverse momentum correlations in Au + Au collisions at RHIC are examined.
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