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Scientific paper - Original scientific paper
Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV
Journal of High Energy Physics, 2019 (2019), 9; 108. https://doi.org/10.1007/JHEP09(2019)108
(ALICE Collaboration) Acharya, S.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Lončar, Petra; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Simatović, Goran; ...; Utrobičić, Antonija; ...; Vicković, Linda; ...; Zinovjev, G. More authors...

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Acharya, S., Antičić, T., Erhardt, F., Gotovac, S., Jerčić, M., Lončar, P. ... Zinovjev, G. (2019). Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2019. (9). doi: 10.1007/JHEP09(2019)108

Acharya, S., et al. "Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV." Journal of High Energy Physics, vol. 2019, no. 9, 2019. https://doi.org/10.1007/JHEP09(2019)108

Acharya, S., Tome Antičić, Filip Erhardt, Sven Gotovac, Marko Jerčić, Petra Lončar, Eugen Mudnić, et al. "Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV." Journal of High Energy Physics 2019, no. 9 (2019). https://doi.org/10.1007/JHEP09(2019)108

Acharya, S., et al. (2019) 'Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV', Journal of High Energy Physics, 2019(9). doi: 10.1007/JHEP09(2019)108

Acharya S, Antičić T, Erhardt F, Gotovac S, Jerčić M, Lončar P, and sur.. Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV. Journal of High Energy Physics [Internet]. 2019 [cited 2024 December 28];2019(9). doi: 10.1007/JHEP09(2019)108

S. Acharya, et al., "Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV", Journal of High Energy Physics, vol. 2019, no. 9, 2019. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:093846. [Accessed: 28 December 2024]

Metadata
Title (english)Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV
AuthorS. Acharya
Author
...
AuthorTome Antičić
MBZ: 218816
Author
...
AuthorFilip Erhardt
MBZ: 345132
Author
...
AuthorSven Gotovac
MBZ: 108173
Author
...
AuthorMarko Jerčić
MBZ: 358125
Author
...
AuthorPetra Lončar
MBZ: 350591
Author
...
AuthorEugen Mudnić
MBZ: 248856
Author
...
AuthorMirko Planinić
MBZ: 213776
Author
...
AuthorNikola Poljak
MBZ: 283732
Author
...
AuthorGoran Simatović
MBZ: 329845
Author
...
AuthorAntonija Utrobičić
MBZ: 342963
Author
...
AuthorLinda Vicković
MBZ: 242565
Author
...
AuthorG. Zinovjev
CollaborationALICE Collaboration
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
Two-particle correlations in high-energy collision experiments enable the extraction of particle source radii by using the Bose-Einstein enhancement of pion production at low relative momentum q ∝ 1/R. It was previously observed that in pp collisions at √s = 7TeV the average pair transverse momentum kT range of such analyses is limited due to large background correlations which were attributed to mini-jet phenomena. To investigate this further, an event-shape dependent analysis of Bose-Einstein correlations for pion pairs is performed in this work. By categorizing the events by their transverse sphericity ST into spherical (ST > 0:7) and jet-like (ST < 0:3) events a method was developed that allows for the determination of source radii for much larger values of kT for the first time. Spherical events demonstrate little or no background correlations while jet-like events are dominated by them. This observation agrees with the hypothesis of a mini-jet origin of the non-femtoscopic background correlations and gives new insight into the physics interpretation of the kT dependence of the radii. The emission source size in spherical events shows a substantially diminished kT dependence, while jet-like events show indications of a negative trend with respect to kT in the highest multiplicity events. Regarding the emission source shape, the correlation functions for both event sphericity classes show good agreement with an exponential shape, rather than a Gaussian one.
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. 2019, no. 9, 108
p-ISSN1126-6708
e-ISSN1029-8479
DOIhttps://doi.org/10.1007/JHEP09(2019)108
URN:NBNurn:nbn:hr:217:093846
Publication2019
Document URLhttps://link.springer.com/article/10.1007/JHEP09(2019)108
Type of resourceText
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Public noteCopyright CERN, for the benefit of the ALICE Collaboration. Article funded by SCOAP3. Open 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: February 26, 2019. Revised: August 15, 2019. Accepted: August 21, 2019. Published: September 13, 2019.
Created on2020-08-19 09:47:16