Beauty production in pp collisions at √s=2.76 TeV measured via semi-electronic decays

ALICE Collaboration

doi:10.1016/j.physletb.2014.09.026

Beauty production in pp collisions at √s=2.76 TeV measured via semi-electronic decays

ALICE Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

The ALICE collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1<p_T<10 GeV/c, in pp collisions at s=2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σ_b→e=3.47±0.40(stat)_−1.33 ^+1.12(sys)±0.07(norm) μb, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total bb¯ production cross section, σ_bb¯=130±15.1(stat)_−49.8 ^+42.1(sys)_−3.1 ^+3.4(extr)±2.5(norm)±4.4(BR) μb.

Original language	English
Pages (from-to)	97-108
Number of pages	12
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	738
DOIs	https://doi.org/10.1016/j.physletb.2014.09.026
Publication status	Published - 10 Nov 2014
Externally published	Yes

Keywords

ALICE experiment
Beauty production
Heavy-flavour production
LHC
Single electrons
pp collisions

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10.1016/j.physletb.2014.09.026

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@article{4f238b81686e465a98517e1871dcd895,

title = "Beauty production in pp collisions at √s=2.76 TeV measured via semi-electronic decays",

abstract = "The ALICE collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1T<10 GeV/c, in pp collisions at s=2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σb→e=3.47±0.40(stat)−1.33 +1.12(sys)±0.07(norm) μb, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total bb¯ production cross section, σbb¯=130±15.1(stat)−49.8 +42.1(sys)−3.1 +3.4(extr)±2.5(norm)±4.4(BR) μb.",

keywords = "ALICE experiment, Beauty production, Heavy-flavour production, LHC, Single electrons, pp collisions",

author = "{ALICE Collaboration} and B. Abelev and J. Adam and D. Adamov{\'a} and Aggarwal, {M. M.} and {Aglieri Rinella}, G. and M. Agnello and A. Agostinelli and N. Agrawal and Z. Ahammed and N. Ahmad and I. Ahmed and Ahn, {S. U.} and Ahn, {S. A.} and I. Aimo and S. Aiola and M. Ajaz and A. Akindinov and Alam, {S. N.} and D. Aleksandrov and B. Alessandro and D. Alexandre and A. Alici and A. Alkin and J. Alme and T. Alt and S. Altinpinar and I. Altsybeev and {Alves Garcia Prado}, C. and C. Andrei and A. Andronic and V. Anguelov and J. Anielski and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and N. Armesto and R. Arnaldi and T. Aronsson and Arsene, {I. C.} and M. Arslandok and A. Augustinus and R. Averbeck and Awes, {T. C.} and Azmi, {M. D.} and P. Cortese and L. Ramello and M. Sitta",

note = "Publisher Copyright: {\textcopyright} 2014",

year = "2014",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2014.09.026",

language = "English",

volume = "738",

pages = "97--108",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Beauty production in pp collisions at √s=2.76 TeV measured via semi-electronic decays

AU - ALICE Collaboration

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agostinelli, A.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N.

AU - Ahmed, I.

AU - Ahn, S. U.

AU - Ahn, S. A.

AU - Aimo, I.

AU - Aiola, S.

AU - Ajaz, M.

AU - Akindinov, A.

AU - Alam, S. N.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alexandre, D.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altinpinar, S.

AU - Altsybeev, I.

AU - Alves Garcia Prado, C.

AU - Andrei, C.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anielski, J.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Armesto, N.

AU - Arnaldi, R.

AU - Aronsson, T.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Awes, T. C.

AU - Azmi, M. D.

AU - Cortese, P.

AU - Ramello, L.

AU - Sitta, M.

PY - 2014/11/10

Y1 - 2014/11/10

N2 - The ALICE collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1T<10 GeV/c, in pp collisions at s=2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σb→e=3.47±0.40(stat)−1.33 +1.12(sys)±0.07(norm) μb, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total bb¯ production cross section, σbb¯=130±15.1(stat)−49.8 +42.1(sys)−3.1 +3.4(extr)±2.5(norm)±4.4(BR) μb.

AB - The ALICE collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1T<10 GeV/c, in pp collisions at s=2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σb→e=3.47±0.40(stat)−1.33 +1.12(sys)±0.07(norm) μb, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total bb¯ production cross section, σbb¯=130±15.1(stat)−49.8 +42.1(sys)−3.1 +3.4(extr)±2.5(norm)±4.4(BR) μb.

KW - ALICE experiment

KW - Beauty production

KW - Heavy-flavour production

KW - LHC

KW - Single electrons

KW - pp collisions

UR - http://www.scopus.com/inward/record.url?scp=85040639385&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2014.09.026

DO - 10.1016/j.physletb.2014.09.026

M3 - Article

SN - 0370-2693

VL - 738

SP - 97

EP - 108

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Beauty production in pp collisions at √s=2.76 TeV measured via semi-electronic decays

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Keywords

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