Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au + Au Collisions at √sNN = 200 GeV
Physical Review Letters Volume 96 Issue 3
Page 032301-1-032301-6
published_at 2006-01-26
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| File | |
| Title ( eng ) |
Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au + Au Collisions at √sNN = 200 GeV
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| Creator |
PHENIX Collaboration
Enokizono Akitomo
Hachiya Takashi
Kohama Takeshi
Nakamura Tomoaki
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| Source Title |
Physical Review Letters
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| Volume | 96 |
| Issue | 3 |
| Start Page | 032301-1 |
| End Page | 032301-6 |
| Abstract |
The PHENIX experiment has measured midrapidity (|η|<0.35) transverse momentum spectra (0.4<pT<5.0GeV/c) of electrons as a function of centrality in Au+Au collisions at sNN=200GeV. Contributions from photon conversions and from light hadron decays, mainly Dalitz decays of π0 and η mesons, were removed. The resulting nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to nonphotonic electrons in p+p collisions. A significant suppression of electrons at high pT is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.
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| Keywords |
heavy ion-nucleus reactions
electron production
meson decay
semileptonic decays
nuclei with mass number 190 to 219
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| Language |
eng
|
| Resource Type | journal article |
| Publisher |
American Physical Society
|
| Date of Issued | 2006-01-26 |
| Rights |
Copyright (c) 2006 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.96.032301
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.96.032301
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