prikaz prve stranice dokumenta Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV
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Scientific paper - Original scientific paper
Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV
Physical Review C, 109 (2024), 4; 044912. https://doi.org/10.1103/PhysRevC.109.044912
(PHENIX Collaboration) Abdulameer, N. J.; ...; Makek, Mihael; ...; Zou, L.

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Abdulameer, N. J., Makek, M. & Zou, L. (2024). Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV. Physical Review C, 109. (4). doi: 10.1103/PhysRevC.109.044912

Abdulameer, N. J., et al. "Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV." Physical Review C, vol. 109, no. 4, 2024. https://doi.org/10.1103/PhysRevC.109.044912

Abdulameer, N. J., Mihael Makek and L. Zou. "Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV." Physical Review C 109, no. 4 (2024). https://doi.org/10.1103/PhysRevC.109.044912

Abdulameer, N. J., Makek, M. and Zou, L. (2024) 'Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV', Physical Review C, 109(4). doi: 10.1103/PhysRevC.109.044912

Abdulameer NJ, Makek M, Zou L. Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV. Physical Review C [Internet]. 2024 [cited 2024 October 04];109(4). doi: 10.1103/PhysRevC.109.044912

N. J. Abdulameer, M. Makek and L. Zou, "Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV", Physical Review C, vol. 109, no. 4, 2024. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:429060. [Accessed: 04 October 2024]

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Metadata
Title (english)Nonprompt direct-photon production in Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV
AuthorN. J. Abdulameer
Author
...
AuthorMihael Makek
Author
...
AuthorL. Zou
CollaborationPHENIX Collaboration
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
The measurement of the direct-photon spectrum from Au+Au collisions at √𝑠𝑁⁢𝑁=200 GeV is presented by the PHENIX Collaboration using the external-photon-conversion technique for 0%–93% central collisions in a transverse-momentum (𝑝𝑇) range of 0.8–10 GeV/𝑐. An excess of direct photons, above prompt-photon production from hard-scattering processes, is observed for 𝑝𝑇<6GeV/𝑐. Nonprompt direct photons are measured by subtracting the prompt component, which is estimated as 𝑁coll-scaled direct photons from 𝑝+𝑝 collisions at 200 GeV, from the direct-photon spectrum. Results are obtained for 0.8<𝑝𝑇<6.0GeV/𝑐 and suggest that the spectrum has an increasing inverse slope from ≈0.2 to 0.4 GeV/𝑐 with increasing 𝑝𝑇, which indicates a possible sensitivity of the measurement to photons from earlier stages of the evolution of the collision. In addition, like the direct-photon production, the 𝑝𝑇-integrated nonprompt direct-photon yields also follow a power-law scaling behavior as a function of collision-system size. The exponent, 𝛼, for the nonprompt component is found to be consistent with 1.1 with no apparent 𝑝𝑇 dependence.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysical Review C
Numberingvol. 109, no. 4, 044912
p-ISSN2469-9985
e-ISSN2469-9993
DOIhttps://doi.org/10.1103/PhysRevC.109.044912
URN:NBNurn:nbn:hr:217:429060
Publication2024
Document URLhttps://link.aps.org/doi/10.1103/PhysRevC.109.044912
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2024 American Physical Society. Received 5 April 2022. Revised 18 December 2023. Accepted 26 January 2024. Published 18 April 2024.
Created on2024-07-29 12:32:37