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In Au+Au collisions at 2<p{sub T}<6 GeV/c baryon production is enhanced compared to p+p collisions. Since charm baryon decays produce electrons less frequently than charm meson decays, the nonphotonic electron spectrum is sensitive to the {lambda}{sub c}/D ratio. In this report we study the dependence of the nonphotonic electron spectrum on the baryon-to-meson ratio for charm hadrons. As an example, we take the {lambda}{sub c}/D ratio to have the same form as the {lambda}/K{sub S}{sup 0} ratio. In this case, even if the total charm quark yield in Au+Au collisions scales with the number of binary nucleon-nucleon collisions (N{sub bin}), the electron spectrum at 2<p{sub T}<5 GeV/c is suppressed by as much as 20% relative to N{sub bin} scaled p+p collisions.
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| Authors: |
Sorensen, P. [Brookhaven National Laboratory, Upton, New York 11973 (United States)];
Dong, X. [University of Science and Technology of China, Hifei Anhui 230026 (China)]
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| Publication Date: | 2006 Aug 15 |
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| OSTI Identifier: | 20863733 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 74; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.74.024902; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA) |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: page(s) 024902-024902.4 |
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| Other Number(s): | Journal ID: ISSN 0556-2813; PRVCAN; TRN: US07A0249032303 |
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| Subject: | 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; D MESONS; ELECTRON SPECTRA; ELECTRONS; GEV RANGE; GOLD 197 REACTIONS; GOLD 197 TARGET; LAMBDA C PLUS BARYONS; NUCLEAR REACTION YIELD; NUCLEON-NUCLEON INTERACTIONS; PARTICLE DECAY; QUARKS; TRANSVERSE MOMENTUM |
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| Update Date: | 2010 Jun 03 |
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