Dynamical heavy-quark recombination and the nonphotonic single-electron puzzle at energies available at the BNL Relativistic Heavy Ion Collider (RHIC)

Journal Article · Mon Dec 14 23:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.064905· OSTI ID:21296613

Ayala, Alejandro ^[1]; Magnin, J ^[2]; Montano, Luis Manuel ^[3]; Sanchez, G Toledo ^[4]

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1. Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico Distrito Federal 04510 (Mexico)
2. Centro Brasileiro de Pesquisas Fisicas, CBPF, Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro (Brazil)
3. Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 14-740, Mexico Distrito Federal 07000 (Mexico)
4. Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Apartado Postal 20-364, Mexico Distrito Federal 01000 (Mexico)

We show that the single, nonphotonic electron nuclear modification factor R{sub AA}{sup e} is affected by the thermal enhancement of the heavy-baryon-to-heavy-meson ratio in relativistic heavy-ion collisions with respect to proton-proton collisions. We make use of the dynamical quark recombination model to compute such a ratio and show that this produces a sizable suppression factor for R{sub AA}{sup e} at intermediate transverse momenta. We argue that this suppression factor needs to be considered, in addition to the energy loss contribution, in calculations of R{sub AA}{sup e}.

• OSTI ID: 21296613
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BARYONS
BNL
BROOKHAVEN RHIC
C QUARKS
ELECTRONS
ENERGY LOSSES
HEAVY ION REACTIONS
MESONS
PROTON-PROTON INTERACTIONS
RECOMBINATION
RELATIVISTIC RANGE
T QUARKS
TRANSVERSE MOMENTUM