Measurement of prompt J/ψand beauty hadron production cross sections at mid-rapidity in pp collisions at √s = 7 TeV

The ALICE Collaboration

Research output: Contribution to journalArticle

41 Citations (Scopus)

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.

Original languageEnglish
Article number065
JournalJournal of High Energy Physics
Volume2012
Issue number11
DOIs
Publication statusPublished - 2012 Jan 1

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quantum chromodynamics
collisions
cross sections
decay
transverse momentum
hadrons
luminosity
quarks
predictions
electrons

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

@article{aa96a0a2a7414accbac538c95b92d135,
title = "Measurement of prompt J/ψand beauty hadron production cross sections at mid-rapidity in pp collisions at √s = 7 TeV",
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.",
author = "{The ALICE Collaboration} and Betty Abelev and Jaroslav Adam and Dagmar Adamova and {Marshall Adare}, Andrew and Madan Aggarwal and {Aglieri Rinella}, Gianluca and {Gabor Agocs}, Andras and Andrea Agostinelli and {Aguilar Salazar}, Saul and Zubayer Ahammed and Arshad Ahmad and Nazeer Ahmad and Ahn, {Sul Ah} and {Un Ahn}, Sang and Alexander Akindinov and Dmitry Aleksandrov and Bruno Alessandro and Molina, {Jose Ruben Alfaro} and Andrea Alici and Anton Alkin and Avina, {Erick Jonathan Almaraz} and Johan Alme and Torsten Alt and Valerio Altini and Sedat Altinpinar and Igor Altsybeev and Cristian Andrei and Anton Andronic and Venelin Anguelov and Jonas Anielski and Anson, {Christopher Daniel} and Tome Anticic and Federico Antinori and Pietro Antonioli and Aphecetche, {Laurent Bernard} and Harald Appelshauser and Nicolas Arbor and Silvia Arcelli and Andreas Arend and Nestor Armesto and Roberta Arnaldi and Aronsson, {Tomas Robert} and Arsene, {Ionut Cristian} and Mesut Arslandok and Andzhey Asryan and Andre Augustinus and Averbeck, {Ralf Peter} and Terry Awes and Kang, {Ju Hwan} and Youngil Kwon",
year = "2012",
month = "1",
day = "1",
doi = "10.1007/JHEP11(2012)065",
language = "English",
volume = "2012",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",
number = "11",

}

Measurement of prompt J/ψand beauty hadron production cross sections at mid-rapidity in pp collisions at √s = 7 TeV. / The ALICE Collaboration.

In: Journal of High Energy Physics, Vol. 2012, No. 11, 065, 01.01.2012.

Research output: Contribution to journalArticle

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 - Kang, Ju Hwan

AU - Kwon, Youngil

PY - 2012/1/1

Y1 - 2012/1/1

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.

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U2 - 10.1007/JHEP11(2012)065

DO - 10.1007/JHEP11(2012)065

M3 - Article

VL - 2012

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 11

M1 - 065

ER -