TY - JOUR
T1 - Measurement of prompt J/ψand beauty hadron production cross sections at mid-rapidity in pp collisions at √s = 7 TeV
AU - The ALICE collaboration
AU - Abelev, Betty
AU - Adam, Jaroslav
AU - Adamova, Dagmar
AU - Marshall Adare, Andrew
AU - Aggarwal, Madan
AU - Aglieri Rinella, Gianluca
AU - Gabor Agocs, Andras
AU - Agostinelli, Andrea
AU - Aguilar Salazar, Saul
AU - Ahammed, Zubayer
AU - Ahmad, Arshad
AU - Ahmad, Nazeer
AU - Ahn, Sul Ah
AU - Un Ahn, Sang
AU - Akindinov, Alexander
AU - Aleksandrov, Dmitry
AU - Alessandro, Bruno
AU - Molina, Jose Ruben Alfaro
AU - Alici, Andrea
AU - Alkin, Anton
AU - Avina, Erick Jonathan Almaraz
AU - Alme, Johan
AU - Alt, Torsten
AU - Altini, Valerio
AU - Altinpinar, Sedat
AU - Altsybeev, Igor
AU - Andrei, Cristian
AU - Andronic, Anton
AU - Anguelov, Venelin
AU - Anielski, Jonas
AU - Anson, Christopher Daniel
AU - Anticic, Tome
AU - Antinori, Federico
AU - Antonioli, Pietro
AU - Aphecetche, Laurent Bernard
AU - Appelshauser, Harald
AU - Arbor, Nicolas
AU - Arcelli, Silvia
AU - Arend, Andreas
AU - Armesto, Nestor
AU - Arnaldi, Roberta
AU - Aronsson, Tomas Robert
AU - Arsene, Ionut Cristian
AU - Arslandok, Mesut
AU - Asryan, Andzhey
AU - Augustinus, Andre
AU - Averbeck, Ralf Peter
AU - Awes, Terry
AU - Aysto, Juha Heikki
AU - Gago, Alberto
PY - 2012
Y1 - 2012
N2 - The ALICE experiment at the LHC has studied J/ψ production at midrapidity in pp collisions at √s = 7TeV through its electron pair decay on a data sample corresponding to an integrated luminosity Lint = 5.6 nb-1. The fraction of J/ψ from the decay of long-lived beauty hadrons was determined for J/ψ candidates with transverse momentum pt > 1.3GeV/c and rapidity |y| < 0.9. The cross section for prompt J/ψ mesons, i.e. directly produced J/ψ and prompt decays of heavier charmonium states such as the ψ(2S) and c resonances, is σprompt J/ψ (pt > 1.3 GeV/c, |y| < 0.9) = 8.3+0.8 (stat.)±} 1.1 (syst.) +1.5 -1.4 (syst. pol.) μb. The cross section for the production of b-hadrons decaying to J/ψ with pt > 1.3GeV/c and |y| < 0.9 is σJ/ψ←hB (pt > 1.3 GeV/c, |y| < 0.9) = 1.46±} 0.38 (stat.) +0.26 -0.32 (syst.) μb. The results are compared to QCD model predictions. The shape of the pt and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the bb pair total cross section and dσ/dy at mid-rapidity.
AB - The ALICE experiment at the LHC has studied J/ψ production at midrapidity in pp collisions at √s = 7TeV through its electron pair decay on a data sample corresponding to an integrated luminosity Lint = 5.6 nb-1. The fraction of J/ψ from the decay of long-lived beauty hadrons was determined for J/ψ candidates with transverse momentum pt > 1.3GeV/c and rapidity |y| < 0.9. The cross section for prompt J/ψ mesons, i.e. directly produced J/ψ and prompt decays of heavier charmonium states such as the ψ(2S) and c resonances, is σprompt J/ψ (pt > 1.3 GeV/c, |y| < 0.9) = 8.3+0.8 (stat.)±} 1.1 (syst.) +1.5 -1.4 (syst. pol.) μb. The cross section for the production of b-hadrons decaying to J/ψ with pt > 1.3GeV/c and |y| < 0.9 is σJ/ψ←hB (pt > 1.3 GeV/c, |y| < 0.9) = 1.46±} 0.38 (stat.) +0.26 -0.32 (syst.) μb. The results are compared to QCD model predictions. The shape of the pt and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the bb pair total cross section and dσ/dy at mid-rapidity.
KW - Hadron-hadron scattering
UR - https://www.scopus.com/pages/publications/84870400031
U2 - 10.1007/JHEP11(2012)065
DO - 10.1007/JHEP11(2012)065
M3 - Article
AN - SCOPUS:84870400031
SN - 1126-6708
VL - 2012
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 11
M1 - 65
ER -