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



Acharya, S, Adamova, D, Adler, A, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I
et al (show 1022 more authors) (2023) Inclusive and multiplicity dependent production of electrons from heavy-flavour hadron decays in pp and p-Pb collisions. JOURNAL OF HIGH ENERGY PHYSICS, 2023 (8). 6-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>Measurements of the production of electrons from heavy-flavour hadron decays in pp collisions at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 13 TeV at midrapidity with the ALICE detector are presented down to a transverse momentum (<jats:italic>p</jats:italic><jats:sub>T</jats:sub>) of 0.2 GeV/<jats:italic>c</jats:italic> and up to <jats:italic>p</jats:italic><jats:sub>T</jats:sub> = 35 GeV/<jats:italic>c</jats:italic>, 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 <jats:italic>p</jats:italic><jats:sub>T</jats:sub> range 0<jats:italic>.</jats:italic>5 <jats:italic>&lt; p</jats:italic><jats:sub>T</jats:sub><jats:italic>&lt;</jats:italic> 26 GeV/<jats:italic>c</jats:italic> at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s_{\textrm{NN}}} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 8<jats:italic>.</jats:italic>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 <jats:italic>p</jats:italic><jats:sub>T</jats:sub> dependence is observed in pp collisions, where the yield of high-<jats:italic>p</jats:italic><jats:sub>T</jats:sub> electrons increases faster as a function of multiplicity than the one of low-<jats:italic>p</jats:italic><jats:sub>T</jats:sub> electrons. The measurement in p-Pb collisions shows no <jats:italic>p</jats:italic><jats:sub>T</jats:sub> 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.</jats:p>

Item Type: Article
Uncontrolled Keywords: Hadron-Hadron Scattering
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Oct 2023 15:54
Last Modified: 14 Mar 2024 20:52
DOI: 10.1007/JHEP08(2023)006
Open Access URL: https://doi.org/10.1007/JHEP08(2023)006
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3173336