Beauty production in pp collisions at $\sqrt{s}$ = 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 $1<p_{\mathrm{T}}<10$ GeV/$c$, in pp collisions at $\sqrt{s}=$ 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 calculations agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, ${\sigma }_{\mathrm{b}\to \mathrm{e}}=3.47\pm 0.40(\mathrm{stat}{)}_{-1.33}^{+1.12}(\mathrm{sys})\pm 0.07(\mathrm{norm})\mu$b, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) predictions to obtain the total b$\bar{\mathrm{b}}$ production cross section, ${\sigma }_{\mathrm{b}\bar{\mathrm{b}}}=130\pm 15.1(\mathrm{stat}{)}_{-49.8}^{+42.1}(\mathrm{sys}{)}_{-3.1}^{+3.4}(\mathrm{extr})\pm 2.5(\mathrm{norm})\pm 4.4(\mathrm{BR})\mu$b.

21 pages, 6 captioned figures, 2 tables, authors from page 16, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/1724

References in corpus (5)

• Evidence of b-jet quenching in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Neutral pion production at midrapidity in pp and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s}$=200 GeV
• Measurement of electrons from semileptonic heavy-flavor hadron decays in pp collisions at $\sqrt{s}=2.76$ TeV
• Reference heavy flavour cross sections in pp collisions at sqrt(s) = 2.76 TeV, using a pQCD-driven sqrt(s)-scaling of ALICE measurements at sqrt(s) = 7 TeV

Cited by in corpus (29)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Open Heavy Flavor in QCD Matter and in Nuclear Collisions
• The ALICE experiment: a journey through QCD
• Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear effects
• Bottom-quark production at hadron colliders: fully differential predictions in NNLO QCD
• Measurement of beauty and charm production in pp collisions at $\sqrt{s}=5.02$ TeV via non-prompt and prompt D mesons
• Measurements of $\mu \mu$ pairs from open heavy flavor and Drell-Yan in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Bottomonium Continuous Production from Unequilibrium Bottom Quarks in Ultrarelativistic Heavy Ion Collisions
• Measurement of the production of high-$p_{\mathrm{T}}$ electrons from heavy-flavour hadron decays in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity in Pb-Pb collisions at $\sqrt{{\mathbf{s}}_{\mathrm{NN}}}$ = 2.76 TeV
• Measurement of azimuthal correlations of D mesons and charged particles in pp collisions at $\sqrt{s}=7$ TeV and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Properties of the QCD Matter: A Review of Selected Results from the ALICE Experiment
• Measurement of electrons from beauty-hadron decays in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: hard probes
• Measurement of dielectron production in central Pb-Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}$ = 2.76 TeV
• Azimuthal anisotropy of heavy-flavour decay electrons in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Dielectron and heavy-quark production in inelastic and high-multiplicity proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Production of muons from heavy-flavour hadron decays in pp collisions at $\sqrt{s}$ = 5.02 TeV
• Production of muons from heavy-flavour hadron decays in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• B-hadron production at the LHC from bottom-quark pair production at NNLO+PS
• Open charm meson production at BNL RHIC within $k_t$-factorization approach and revision of their semileptonic decays
• Measurement of electrons from beauty-hadron decays in pp and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• A new description of transverse momentum spectra of identified particles produced in proton-proton collisions at high energies
• Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• INFN What Next: Ultra-relativistic Heavy-Ion Collisions
• Suppression of quarkonia in PbPb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV
• Low-Mass Dielectron Production in pp, p-Pb and Pb-Pb Collisions with ALICE
• Measurements of open heavy-flavour production with ALICE at the LHC
• Elliptic flow of electrons from beauty-hadron decays extracted from Pb--Pb collision data at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV