期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.232301
关键词
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资金
- Office of Nuclear Physics in DOE Office of Science
- NSF (USA)
- MEXT
- JSPS (Japan)
- CNPq
- FAPESP (Brazil)
- NSFC (China)
- MSMT (Czech Republic)
- IN2P3/CNRS
- CEA (France)
- BMBF
- DAAD
- AvH (Germany)
- OTKA (Hungary)
- DAE (India)
- ISF (Israel)
- KRF
- KOSEF (Korea)
- MES
- RAS
- FAAE (Russia)
- VR
- KAW (Sweden)
- U.S. CRDF
- US-Hungarian NSF-OTKA-MTA
- US-Israel BSF
For Au + Au collisions at 200 GeV, we measure neutral pion production with good statistics for transverse momentum, p(T), up to 20 GeV/c. A fivefold suppression is found, which is essentially constant for 5 < p(T) < 20 GeV/c. Experimental uncertainties are small enough to constrain any model-dependent parametrization for the transport coefficient of the medium, e. g., <(q) over cap > in the parton quenching model. The spectral shape is similar for all collision classes, and the suppression does not saturate in Au + Au collisions.
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