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

45 Scopus citations

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 B
Volume	738
DOIs	https://doi.org/10.1016/j.physletb.2014.09.026
State	Published - Nov 10 2014
Externally published	Yes

Funding

The ALICE Collaboration would like to thank all its engineers and technicians for their invaluable contributions to the construction of the experiment and the CERN accelerator teams for the outstanding performance of the LHC complex. The ALICE Collaboration gratefully acknowledges the resources and support provided by all Grid centres and the Worldwide LHC Computing Grid (WLCG) Collaboration. The ALICE Collaboration acknowledges the following funding agencies for their support in building and running the ALICE detector: State Committee of Science, World Federation of Scientists (WFS) and Swiss Fonds Kidagan , Armenia, Conselho Nacional de Desenvolvimento Cient\u00EDfico e Tecnol\u00F3gico ( CNPq ), Financiadora de Estudos e Projetos (FINEP), Funda\u00E7\u00E3o de Amparo \u00E0 Pesquisa do Estado de S\u00E3o Paulo ( FAPESP ); National Natural Science Foundation of China ( NSFC ), the Chinese Ministry of Education (CMOE) and the Ministry of Science and Technology of China (MSTC); Ministry of Education and Youth of the Czech Republic ; Danish Natural Science Research Council , the Carlsberg Foundation and the Danish National Research Foundation ; The European Research Council under the European Community's Seventh Framework Programme; Helsinki Institute of Physics and the Academy of Finland ; French CNRS-IN2P3 , the \u2018Region Pays de Loire\u2019 , \u2018Region Alsace\u2019 , \u2018Region Auvergne\u2019 and CEA, France ; German BMBF and the Helmholtz Association ; General Secretariat for Research and Technology , Ministry of Development, Greece ; Hungarian OTKA and National Office for Research and Technology ( NKTH ); Department of Atomic Energy and Department of Science and Technology of the Government of India ; Istituto Nazionale di Fisica Nucleare ( INFN ) and Centro Fermi \u2013 Museo Storico della Fisica e Centro Studi e Ricerche \u201CEnrico Fermi\u201D , Italy; MEXT Grant-in-Aid for Specially Promoted Research, Japan; Joint Institute for Nuclear Research , Dubna; National Research Foundation of Korea ( NRF ); CONACYT , DGAPA , M\u00E9xico, ALFA-EC and the EPLANET Program (European Particle Physics Latin American Network) Stichting voor Fundamenteel Onderzoek der Materie ( FOM ) and the Nederlandse Organisatie voor Wetenschappelijk Onderzoek ( NWO ), Netherlands; Research Council of Norway (NFR); Polish Ministry of Science and Higher Education ; National Science Centre, Poland ; Ministry of National Education/Institute for Atomic Physics and CNCS-UEFISCDI \u2013 Romania ; Ministry of Education and Science of Russian Federation , Russian Academy of Sciences , Russian Federal Agency of Atomic Energy , Russian Federal Agency for Science and Innovations and The Russian Foundation for Basic Research ; Ministry of Education of Slovakia ; Department of Science and Technology, South Africa ; CIEMAT , EELA , Ministerio de Econom\u00EDa y Competitividad ( MINECO ) of Spain, Xunta de Galicia (Conseller\u00EDa de Educaci\u00F3n) , CEADEN , Cubaenerg\u00EDa, Cuba , and IAEA ( International Atomic Energy Agency ); Swedish Research Council (VR) and Knut & Alice Wallenberg Foundation (KAW); Ukraine Ministry of Education and Science ; United Kingdom Science and Technology Facilities Council ( STFC ); The United States Department of Energy , the United States National Science Foundation , the State of Texas , and the State of Ohio .

Keywords

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

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10.1016/j.physletb.2014.09.026

Cite this

@article{2ce69220ca7b475b9e7951bb748056eb,

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 F. Bock and I. Garishvili and Read, {K. F.}",

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 B",

issn = "0370-2693",

publisher = "Elsevier",

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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 - Bock, F.

AU - Garishvili, I.

AU - Read, K. F.

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

AN - SCOPUS:85040639385

SN - 0370-2693

VL - 738

SP - 97

EP - 108

JO - Physics Letters B

JF - Physics Letters B

ER -

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

Abstract

Funding

Keywords

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