Measurement of electrons from heavy-flavour hadron decays in p–Pb collisions at √sNN=5.02 TeV
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Issue Date
2015-12-31Author
ALICE Collaboration
Publisher
Elsevier
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
©2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license.
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The production of electrons from heavy-flavour hadron decays was measured as a function of transverse momentum (pTpT) in minimum-bias p–Pb collisions at View the MathML sourcesNN=5.02 TeV using the ALICE detector at the LHC. The measurement covers the pTpT interval 0.5<pT<12 GeV/c0.5<pT<12 GeV/c and the rapidity range −1.065<ycms<0.135−1.065<ycms<0.135 in the centre-of-mass reference frame. The contribution of electrons from background sources was subtracted using an invariant mass approach. The nuclear modification factor RpPbRpPb was calculated by comparing the pTpT-differential invariant cross section in p–Pb collisions to a pp reference at the same centre-of-mass energy, which was obtained by interpolating measurements at View the MathML sources=2.76 TeV and View the MathML sources=7 TeV. The RpPbRpPb is consistent with unity within uncertainties of about 25%, which become larger for pTpT below 1 GeV/c1 GeV/c. The measurement shows that heavy-flavour production is consistent with binary scaling, so that a suppression in the high-pTpT yield in Pb–Pb collisions has to be attributed to effects induced by the hot medium produced in the final state. The data in p–Pb collisions are described by recent model calculations that include cold nuclear matter effects.
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Citation
ALICE collaboration. (2016). Measurement of electrons from heavy-flavour hadron decays in p–Pb collisions at. Physics letters B, 754, 81-93.
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