prikaz prve stranice dokumenta Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV
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Scientific paper - Original scientific paper
Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV
Journal of High Energy Physics, 2023 (2023), 06; 024. https://doi.org/10.1007/jhep06(2023)024
(ALICE Collaboration) Acharya, S.; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Karatović, David; ...; Lončar, Petra; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Vicković, Linda; ...; Zurlo, N. More authors...

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Acharya, S., Erhardt, F., Gotovac, S., Jerčić, M., Karatović, D., Lončar, P. ... Zurlo, N. (2023). Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2023. (06). doi: 10.1007/jhep06(2023)024

Acharya, S., et al. "Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV." Journal of High Energy Physics, vol. 2023, no. 06, 2023. https://doi.org/10.1007/jhep06(2023)024

Acharya, S., Filip Erhardt, Sven Gotovac, Marko Jerčić, David Karatović, Petra Lončar, Eugen Mudnić, et al. "Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV." Journal of High Energy Physics 2023, no. 06 (2023). https://doi.org/10.1007/jhep06(2023)024

Acharya, S., et al. (2023) 'Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV', Journal of High Energy Physics, 2023(06). doi: 10.1007/jhep06(2023)024

Acharya S, Erhardt F, Gotovac S, Jerčić M, Karatović D, Lončar P, and sur.. Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV. Journal of High Energy Physics [Internet]. 2023 [cited 2024 November 16];2023(06). doi: 10.1007/jhep06(2023)024

S. Acharya, et al., "Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV", Journal of High Energy Physics, vol. 2023, no. 06, 2023. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:830274. [Accessed: 16 November 2024]

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Metadata
Title (english)Dielectron production at midrapidity at low transverse momentum in peripheral and semi- peripheral Pb–Pb collisions at √sNN = 5.02 TeV
AuthorS. Acharya
Author
...
AuthorFilip Erhardt
Author
...
AuthorSven Gotovac
Author
...
AuthorMarko Jerčić
Author
...
AuthorDavid Karatović
Author
...
AuthorPetra Lončar
Author
...
AuthorEugen Mudnić
Author
...
AuthorMirko Planinić
Author
...
AuthorNikola Poljak
Author
...
AuthorLinda Vicković
Author
...
AuthorN. Zurlo
CollaborationALICE Collaboration
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
The first measurement of the e+e− pair production at low lepton pair transverse momentum (pT, ee) and low invariant mass (mee) in non-central Pb–Pb collisions at √sNN = 5.02 TeV at the LHC is presented. The dielectron production is studied with the ALICE detector at midrapidity (|ηe| < 0.8) as a function of invariant mass (0.4≤ mee < 2.7 GeV/c^2) in the 50–70% and 70–90% centrality classes for pT, ee < 0.1 GeV/c, and as a function of pT, ee in three mee intervals in the most peripheral Pb–Pb collisions. Below a pT, ee of 0.1 GeV/c, a clear excess of e+e − pairs is found compared to the expectations from known hadronic sources and predictions of thermal radiation from the medium. The mee excess spectra are reproduced, within uncertainties, by different predictions of the photon–photon production of dielectrons, where the photons originate from the extremely strong electromagnetic fields generated by the highly Lorentz-contracted Pb nuclei. Lowest- order quantum electrodynamic (QED) calculations, as well as a model that takes into account the impact- parameter dependence of the average transverse momentum of the photons, also provide a good description of the pT, ee spectra. The measured √<p^2T, ee> of the excess pT, ee spectrum in peripheral Pb–Pb collisions is found to be comparable to the values observed previously at RHIC in a similar phase-space region.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleJournal of High Energy Physics
Numberingvol. 2023, no. 06, 024
p-ISSN1126-6708
e-ISSN1029-8479
DOIhttps://doi.org/10.1007/jhep06(2023)024
URN:NBNurn:nbn:hr:217:830274
Publication2023
Document URLhttps://link.springer.com/article/10.1007/JHEP06(2023)024
Type of resourceText
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Public noteOpen Access . This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received 25 May 2022; Accepted 08 October 2022; Published 05 June 2023.
Created on2023-08-23 09:39:07