Refine
Year of publication
Document Type
- Article (102) (remove)
Language
- English (102)
Has Fulltext
- yes (102)
Is part of the Bibliography
- no (102)
Keywords
- LHC (3)
- ALICE (2)
- Polarization (2)
- 900 GeV (1)
- Bee venom allergy (1)
- Charmonia (1)
- Elastic scattering (1)
- Femtoscopy (1)
- Flow (1)
- HBT (1)
- Hadronization (1)
- Heavy ion collisions (1)
- Heavy-ion (1)
- Heavy-ion collisions (1)
- Hymenoptera venom immunotherapy (1)
- Intensity interferometry (1)
- Net-charge correlations (1)
- Net-charge fluctuations (1)
- Nonflow (1)
- Nuclear modification factor (1)
- PYTHIA (1)
- Pb–Pb (1)
- RHIC (1)
- Rush protocol (1)
- STAR (1)
- Spin alignment (1)
- Transverse momentum (1)
- Ultra-rush protocol (1)
- Vespid venom allergy (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (96)
- Frankfurt Institute for Advanced Studies (FIAS) (12)
- Informatik (5)
- Medizin (1)
We present the first measurements of charge-dependent correlations on angular difference variables η1 − η2 (pseudorapidity) and φ1 − φ2 (azimuth) for primary charged hadrons with transverse momentum 0.15 <= pt <= 2 GeV/c and |η| <= 1.3 from Au–Au collisions at √sNN = 130 GeV. We observe correlation structures not predicted by theory but consistent with evolution of hadron emission geometry with increasing centrality from one-dimensional fragmentation of color strings along the beam direction to an at least two-dimensional hadronization geometry along the beam and azimuth directions of a hadron-opaque bulk medium.
The acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from the inclusive dielectron mass spectra, are reported for the first time at mid-rapidity |yee|<1 in minimum-bias Au+Au collisions at sNN−−−−√ = 19.6 and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened ρ spectral function for Mee<1.1 GeV/c2. The integrated dielectron excess yield at sNN−−−−√ = 19.6 GeV for 0.4<Mee<0.75 GeV/c2, normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In+In collisions at sNN−−−−√ = 17.3 GeV. For sNN−−−−√ = 200 GeV, the normalized excess yield in central collisions is higher than that at sNN−−−−√ = 17.3 GeV and increases from peripheral to central collisions. These measurements indicate that the lifetime of the hot, dense medium created in central Au+Au collisions at sNN−−−−√ = 200 GeV is longer than those in peripheral collisions and at lower energies.