Title
Measurement of prompt J/ψand beauty hadron production cross sections at mid-rapidity in pp collisions at √s = 7 TeV
Date Issued
01 January 2012
Access level
open access
Resource Type
journal article
Author(s)
Abelev B.
Adam J.
Adamova D.
Marshall Adare A.
Aggarwal M.
Aglieri Rinella G.
Gabor Agocs A.
Agostinelli A.
Aguilar Salazar S.
Ahammed Z.
Ahmad A.
Ahmad N.
Ahn S.A.
Un Ahn S.
Akindinov A.
Aleksandrov D.
Alessandro B.
Molina J.R.A.
Alici A.
Alkin A.
Avina E.J.A.
Alme J.
Alt T.
Altini V.
Altinpinar S.
Altsybeev I.
Andrei C.
Andronic A.
Anguelov V.
Anielski J.
Anson C.D.
Anticic T.
Antinori F.
Antonioli P.
Aphecetche L.B.
Appelshauser H.
Arbor N.
Arcelli S.
Arend A.
Armesto N.
Arnaldi R.
Aronsson T.R.
Arsene I.C.
Arslandok M.
Asryan A.
Augustinus A.
Averbeck R.P.
Awes T.
Aysto J.H.
Azmi M.D.
Bach M.J.
Badala A.
Baek Y.W.
Bailhache R.M.
Bala R.
Ferroli R.B.
Baldisseri A.
Baldit A.
Dos Santos Pedrosa F.B.
Ban J.
Baral R.C.
Barbera R.
Barile F.
Barnafoldi G.G.
Barnby L.S.
Barret V.
Bartke J.G.
Basile M.
Bastid N.
Basu S.
Bathen B.
Batigne G.
Batyunya B.
Baumann C.H.
Bearden I.G.
Beck H.
Behera N.K.
Belikov I.
Bellini F.
Bellwied R.
Belmont-Moreno E.
Bencedi G.
Beole S.
Berceanu I.
Bercuci A.
Berdnikov Y.
Berenyi D.
Bergognon A.A.E.
Berzano D.
Betev L.
Bhasin A.
Bhati A.K.
Bhom J.
Bianchi L.
Bianchi N.
Bianchin C.
Bielcik J.
Bielcikova J.
Bilandzic A.
Publisher(s)
Springer Verlag
Abstract
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. © SISSA 2012.
Volume
2012
Issue
11
Language
English
OCDE Knowledge area
Física atómica, molecular y química Física nuclear Física de partículas, Campos de la Física
Scopus EID
2-s2.0-84870400031
Source
Journal of High Energy Physics
ISSN of the container
11266708
Sponsor(s)
National Science Foundation - 0968903, 0969966. Science and Technology Facilities Council - ST/G008833/1, ST/I003398/1, ST/J000108/1, ST/J000140/1. Japan Society for the Promotion of Science - 20224014, 23340074.
Sources of information: Directorio de Producción Científica Scopus