Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p–Pb collisions at √sNN = 5.02 TeV



Acharya, S, Adamová, D, Adler, A, Aglieri Rinella, G, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I
et al (show 1029 more authors) (2023) Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p–Pb collisions at √sNN = 5.02 TeV. The European Physical Journal C, 83 (8).

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Abstract

<jats:title>Abstract</jats:title><jats:p>The azimuthal (<jats:inline-formula><jats:alternatives><jats:tex-math>$$\Delta \varphi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Δ</mml:mi> <mml:mi>φ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>) correlation distributions between heavy-flavor decay electrons and associated charged particles are measured in pp and p–Pb collisions at <jats:inline-formula><jats:alternatives><jats:tex-math>$$\sqrt{s_{\mathrm{{NN}}}} = 5.02$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>5.02</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> TeV. Results are reported for electrons with transverse momentum <jats:inline-formula><jats:alternatives><jats:tex-math>$$4&lt;p_{\textrm{T}}&lt;16$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>4</mml:mn> <mml:mo>&lt;</mml:mo> <mml:msub> <mml:mi>p</mml:mi> <mml:mtext>T</mml:mtext> </mml:msub> <mml:mo>&lt;</mml:mo> <mml:mn>16</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula><jats:inline-formula><jats:alternatives><jats:tex-math>$$\textrm{GeV}/c$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>GeV</mml:mtext> <mml:mo>/</mml:mo> <mml:mi>c</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> and pseudorapidity <jats:inline-formula><jats:alternatives><jats:tex-math>$$|\eta |&lt;0.6$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>|</mml:mo> <mml:mi>η</mml:mi> <mml:mo>|</mml:mo> <mml:mo>&lt;</mml:mo> <mml:mn>0.6</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. The associated charged particles are selected with transverse momentum <jats:inline-formula><jats:alternatives><jats:tex-math>$$1&lt;p_{\textrm{T}}&lt;7$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>1</mml:mn> <mml:mo>&lt;</mml:mo> <mml:msub> <mml:mi>p</mml:mi> <mml:mtext>T</mml:mtext> </mml:msub> <mml:mo>&lt;</mml:mo> <mml:mn>7</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula><jats:inline-formula><jats:alternatives><jats:tex-math>$$\textrm{GeV}/c$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>GeV</mml:mtext> <mml:mo>/</mml:mo> <mml:mi>c</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>, and relative pseudorapidity separation with the leading electron <jats:inline-formula><jats:alternatives><jats:tex-math>$$|\Delta \eta | &lt; 1$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>|</mml:mo> <mml:mi>Δ</mml:mi> <mml:mi>η</mml:mi> <mml:mo>|</mml:mo> <mml:mo>&lt;</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. The correlation measurements are performed to study and characterize the fragmentation and hadronization of heavy quarks. The correlation structures are fitted with a constant and two von Mises functions to obtain the baseline and the near- and away-side peaks, respectively. The results from p–Pb collisions are compared with those from pp collisions to study the effects of cold nuclear matter. In the measured trigger electron and associated particle kinematic regions, the two collision systems give consistent results. The <jats:inline-formula><jats:alternatives><jats:tex-math>$$\Delta \varphi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Δ</mml:mi> <mml:mi>φ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> distribution and the peak observables in pp and p–Pb collisions are compared with calculations from various Monte Carlo event generators.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Oct 2023 15:35
Last Modified: 02 Oct 2023 15:38
DOI: 10.1140/epjc/s10052-023-11835-x
Open Access URL: https://doi.org/10.1140/epjc/s10052-023-11835-x
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3173325