Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at sNN=5.02 TeV

J. Adam; D. Adamova; M.M Aggarwal; G Aglieri Rinella; M. Agnello; N Agrawal; Peter Christiansen; Martin Ljunggren; Anders Oskarsson; Tuva Richert; David Silvermyr; Evert Stenlund; Vytautas Vislavicius

doi:10.1016/j.physletb.2017.07.017

Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at sNN=5.02 TeV

J. Adam, D. Adamova, M.M Aggarwal, G Aglieri Rinella, M. Agnello, N Agrawal, Peter Christiansen, Martin Ljunggren, Anders Oskarsson, Tuva Richert, David Silvermyr, Evert Stenlund, Vytautas Vislavicius

Particle and nuclear physics

Research output: Contribution to journal › Article › peer-review

Abstract

We present the charged-particle pseudorapidity density in Pb–Pb collisions at sNN=5.02 TeV in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5 to 5, which is sufficient for reliable estimates of the total number of charged particles produced in the collisions. For the most central (0–5%) collisions we find 21400±1300, while for the most peripheral (80–90%) we find 230±38. This corresponds to an increase of (27±4)% over the results at sNN=2.76 TeV previously reported by ALICE. The energy dependence of the total number of charged particles produced in heavy-ion collisions is found to obey a modified power-law like behaviour. The charged-particle pseudorapidity density of the most central collisions is compared to model calculations — none of which fully describes the measured distribution. We also present an estimate of the rapidity density of charged particles. The width of that distribution is found to exhibit a remarkable proportionality to the beam rapidity, independent of the collision energy from the top SPS to LHC energies. © 2017 The Author(s)

Original language	English
Pages (from-to)	567-577
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	772
DOIs	https://doi.org/10.1016/j.physletb.2017.07.017
Publication status	Published - 2017

Bibliographical note

Export Date: 31 July 2017

Subject classification (UKÄ)

Subatomic Physics

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10.1016/j.physletb.2017.07.017

Cite this

Adam, J., Adamova, D., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Christiansen, P., Ljunggren, M., Oskarsson, A., Richert, T., Silvermyr, D., Stenlund, E., & Vislavicius, V. (2017). Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at sNN=5.02 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 772, 567-577. https://doi.org/10.1016/j.physletb.2017.07.017

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title = "Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at sNN=5.02 TeV",

abstract = "We present the charged-particle pseudorapidity density in Pb–Pb collisions at sNN=5.02 TeV in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5 to 5, which is sufficient for reliable estimates of the total number of charged particles produced in the collisions. For the most central (0–5%) collisions we find 21400±1300, while for the most peripheral (80–90%) we find 230±38. This corresponds to an increase of (27±4)% over the results at sNN=2.76 TeV previously reported by ALICE. The energy dependence of the total number of charged particles produced in heavy-ion collisions is found to obey a modified power-law like behaviour. The charged-particle pseudorapidity density of the most central collisions is compared to model calculations — none of which fully describes the measured distribution. We also present an estimate of the rapidity density of charged particles. The width of that distribution is found to exhibit a remarkable proportionality to the beam rapidity, independent of the collision energy from the top SPS to LHC energies. {\textcopyright} 2017 The Author(s)",

author = "J. Adam and D. Adamova and M.M Aggarwal and {Aglieri Rinella}, G and M. Agnello and N Agrawal and Peter Christiansen and Martin Ljunggren and Anders Oskarsson and Tuva Richert and David Silvermyr and Evert Stenlund and Vytautas Vislavicius",

note = "Export Date: 31 July 2017",

year = "2017",

doi = "10.1016/j.physletb.2017.07.017",

language = "English",

volume = "772",

pages = "567--577",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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Adam, J, Adamova, D, Aggarwal, MM, Aglieri Rinella, G, Agnello, M, Agrawal, N, Christiansen, P, Ljunggren, M, Oskarsson, A, Richert, T, Silvermyr, D , Stenlund, E & Vislavicius, V 2017, 'Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at sNN=5.02 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 772, pp. 567-577. https://doi.org/10.1016/j.physletb.2017.07.017

TY - JOUR

T1 - Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at sNN=5.02 TeV

AU - Adam, J.

AU - Adamova, D.

AU - Aggarwal, M.M

AU - Aglieri Rinella, G

AU - Agnello, M.

AU - Agrawal, N

AU - Christiansen, Peter

AU - Ljunggren, Martin

AU - Oskarsson, Anders

AU - Richert, Tuva

AU - Silvermyr, David

AU - Stenlund, Evert

AU - Vislavicius, Vytautas

N1 - Export Date: 31 July 2017

PY - 2017

Y1 - 2017

N2 - We present the charged-particle pseudorapidity density in Pb–Pb collisions at sNN=5.02 TeV in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5 to 5, which is sufficient for reliable estimates of the total number of charged particles produced in the collisions. For the most central (0–5%) collisions we find 21400±1300, while for the most peripheral (80–90%) we find 230±38. This corresponds to an increase of (27±4)% over the results at sNN=2.76 TeV previously reported by ALICE. The energy dependence of the total number of charged particles produced in heavy-ion collisions is found to obey a modified power-law like behaviour. The charged-particle pseudorapidity density of the most central collisions is compared to model calculations — none of which fully describes the measured distribution. We also present an estimate of the rapidity density of charged particles. The width of that distribution is found to exhibit a remarkable proportionality to the beam rapidity, independent of the collision energy from the top SPS to LHC energies. © 2017 The Author(s)

AB - We present the charged-particle pseudorapidity density in Pb–Pb collisions at sNN=5.02 TeV in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5 to 5, which is sufficient for reliable estimates of the total number of charged particles produced in the collisions. For the most central (0–5%) collisions we find 21400±1300, while for the most peripheral (80–90%) we find 230±38. This corresponds to an increase of (27±4)% over the results at sNN=2.76 TeV previously reported by ALICE. The energy dependence of the total number of charged particles produced in heavy-ion collisions is found to obey a modified power-law like behaviour. The charged-particle pseudorapidity density of the most central collisions is compared to model calculations — none of which fully describes the measured distribution. We also present an estimate of the rapidity density of charged particles. The width of that distribution is found to exhibit a remarkable proportionality to the beam rapidity, independent of the collision energy from the top SPS to LHC energies. © 2017 The Author(s)

U2 - 10.1016/j.physletb.2017.07.017

DO - 10.1016/j.physletb.2017.07.017

M3 - Article

SN - 0370-2693

VL - 772

SP - 567

EP - 577

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics