Inclusive and multiplicity dependent production of electrons from heavy-flavour hadron decays in pp and p-Pb collisions - INSPIRE

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Inclusive and multiplicity dependent production of electrons from heavy-flavour hadron decays in pp and p-Pb collisions

ALICE

Collaboration

Mar 23, 2023

46 pages

Published in:

JHEP 08 (2023) 006

Published: Aug 2, 2023

e-Print:

2303.13349 [nucl-ex]

DOI:

10.1007/JHEP08(2023)006

Report number:

CERN-EP-2023-041

Experiments:

CERN-LHC-ALICE,
CERN-LHC-ALICE

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Abstract: (Springer)

Measurements of the production of electrons from heavy-flavour hadron decays in pp collisions at

\sqrt{s}

= 13 TeV at midrapidity with the ALICE detector are presented down to a transverse momentum (p

_{T}

) of 0.2 GeV/c and up to p

_{T}

= 35 GeV/c, which is the largest momentum range probed for inclusive electron measurements in ALICE. In p-Pb collisions, the production cross section and the nuclear modification factor of electrons from heavy-flavour hadron decays are measured in the p

_{T}

range 0.5 < p

_{T}

< 26 GeV/c at

\sqrt{s_{\textrm{NN}}}

= 8.16 TeV. The nuclear modification factor is found to be consistent with unity within the statistical and systematic uncertainties. In both collision systems, first measurements of the yields of electrons from heavy-flavour hadron decays in different multiplicity intervals normalised to the multiplicity-integrated yield (self-normalised yield) at midrapidity are reported as a function of the self-normalised charged-particle multiplicity estimated at midrapidity. The self-normalised yields in pp and p-Pb collisions grow faster than linear with the self-normalised multiplicity. A strong p

_{T}

dependence is observed in pp collisions, where the yield of high-p

_{T}

electrons increases faster as a function of multiplicity than the one of low-p

_{T}

electrons. The measurement in p-Pb collisions shows no p

_{T}

dependence within uncertainties. The self-normalised yields in pp and p-Pb collisions are compared with measurements of other heavy-flavour, light-flavour, and strange particles, and with Monte Carlo simulations.[graphic not available: see fulltext]

Note:

46 pages, 17 captioned figures, 8 tables, authors from page 41, published version, figures at http://alice-publications.web.cern.ch/node/9209

Hadron-Hadron Scattering
hadron: decay
electron: production
multiplicity: difference
numerical calculations: Monte Carlo
multiplicity: dependence
electron: yield
p p: scattering
charged particle: multiplicity
heavy quark

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