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Measurement of Bottom Versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sq root(s)=200 GeV

Adare, A. ; Bickley, A. A. ; Ellinghaus, F. ; Glenn, A. ; Kinney, E. ; Kiriluk, K. ; Nagle, J. L. ; Seele, J. ; Wysocki, M. ; Afanasiev, S. ; Isupov, A. ; Litvinenko, A. ; Malakhov, A. ; Peresedov, V. ; Rukoyatkin, P. ; Zolin, L. ; Aidala, C. ; Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003-9337 ; Ajitanand, N. N. ; Alexander, J. ; Chung, P.

Physical review letters, 2009-08, Vol.103 (8) [Periódico revisado por pares]

United States

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Título:
Measurement of Bottom Versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sq root(s)=200 GeV
Autor: Adare, A. ; Bickley, A. A. ; Ellinghaus, F. ; Glenn, A. ; Kinney, E. ; Kiriluk, K. ; Nagle, J. L. ; Seele, J. ; Wysocki, M. ; Afanasiev, S. ; Isupov, A. ; Litvinenko, A. ; Malakhov, A. ; Peresedov, V. ; Rukoyatkin, P. ; Zolin, L. ; Aidala, C. ; Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003-9337 ; Ajitanand, N. N. ; Alexander, J. ; Chung, P.
Assuntos: ACCELERATORS ; B QUARKS ; BARYON-BARYON INTERACTIONS ; BEAUTY PARTICLES ; BOSONS ; BROOKHAVEN RHIC ; C QUARKS ; CHARM PARTICLES ; CROSS SECTIONS ; DECAY ; ELECTRONS ; ELEMENTARY PARTICLES ; ENERGY RANGE ; FERMIONS ; FIELD THEORIES ; GEV RANGE ; GEV RANGE 100-1000 ; HADRON-HADRON INTERACTIONS ; HADRONS ; HEAVY ION ACCELERATORS ; INTERACTIONS ; KAONS ; KAONS MINUS ; KAONS PLUS ; LEPTONS ; LINEAR MOMENTUM ; MESONS ; NUCLEON-NUCLEON INTERACTIONS ; PARTICLE DECAY ; PARTICLE INTERACTIONS ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; PROTON-NUCLEON INTERACTIONS ; PROTON-PROTON INTERACTIONS ; PSEUDOSCALAR MESONS ; QUANTUM CHROMODYNAMICS ; QUANTUM FIELD THEORY ; QUARKS ; SEMILEPTONIC DECAY ; STORAGE RINGS ; STRANGE MESONS ; STRANGE PARTICLES ; TRANSVERSE MOMENTUM ; WEAK PARTICLE DECAY
É parte de: Physical review letters, 2009-08, Vol.103 (8)
Descrição: The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity |y|<0.35 in p+p collisions at sq root(s)=200 GeV is measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range 2e{sup +}-K{sup +}-X (K unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above 4 GeV/c in p{sub T}. A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is sigma{sub bb}=3.2{sub -1.1}{sup +1.2}(stat){sub -1.3}{sup +1.4}(syst)mub.
Editor: United States
Idioma: Inglês

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Measurement of Bottom Versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sq root(s)=200 GeV

United States

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