David Silvermyr
Senior lecturer
Measurements of Multiparticle Correlations in d+Au Collisions at 200, 62.4, 39, and 19.6 GeV and p+Au Collisions at 200 GeV and Implications for Collective Behavior
Author
Summary, in English
Recently, multiparticle-correlation measurements of relativistic p/d/He3+Au, p+Pb, and even p+p collisions show surprising collective signatures. Here, we present beam-energy-scan measurements of two-, four-, and six-particle angular correlations in d+Au collisions at sNN=200, 62.4, 39, and 19.6 GeV. We also present measurements of two- and four-particle angular correlations in p+Au collisions at sNN=200 GeV. We find the four-particle cumulant to be real valued for d+Au collisions at all four energies. We also find that the four-particle cumulant in p+Au has the opposite sign as that in d+Au. Further, we find that the six-particle cumulant agrees with the four-particle cumulant in d+Au collisions at 200 GeV, indicating that nonflow effects are subdominant. These observations provide strong evidence that the correlations originate from the initial geometric configuration, which is then translated into the momentum distribution for all particles, commonly referred to as collectivity. © 2018 American Physical Society.
Department/s
- Particle and nuclear physics
Publishing year
2018
Language
English
Publication/Series
Physical Review Letters
Volume
120
Issue
6
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Keywords
- Colliding beam accelerators
- Germanium compounds
- Lead
- Angular correlations
- Beam energies
- Collective behavior
- Geometric configurations
- Measurements of
- Momentum distributions
- Multi-particle correlation
- Scan measurement
- Gold compounds
Status
Published
ISBN/ISSN/Other
- ISSN: 1079-7114