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Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions
Physical Review Letters, 132 (2024), 22; 222303. https://doi.org/10.1103/PhysRevLett.132.222303
(ALICE Collaboration) Acharya, S.; ...; Gotovac, Sven; ...; Karatović, David; ...; Kovačić, Nino; ...; Lončar, Petra; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Vicković, Linda; ...; Zurlo, N. Više autora...

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Acharya, S., Gotovac, S., Karatović, D., Kovačić, N., Lončar, P., Planinić, M. ... Zurlo, N. (2024). Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions. Physical Review Letters, 132. (22). doi: 10.1103/PhysRevLett.132.222303

Acharya, S., et al. "Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions." Physical Review Letters, vol. 132, br. 22, 2024. https://doi.org/10.1103/PhysRevLett.132.222303

Acharya, S., Sven Gotovac, David Karatović, Nino Kovačić, Petra Lončar, Mirko Planinić, Nikola Poljak, Linda Vicković i N. Zurlo. "Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions." Physical Review Letters 132, br. 22 (2024). https://doi.org/10.1103/PhysRevLett.132.222303

Acharya, S., et al. (2024) 'Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions', Physical Review Letters, 132(22). doi: 10.1103/PhysRevLett.132.222303

Acharya S, Gotovac S, Karatović D, Kovačić N, Lončar P, Planinić M, i sur.. Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions. Physical Review Letters [Internet]. 2024. [pristupljeno 13.09.2024.];132(22). doi: 10.1103/PhysRevLett.132.222303

S. Acharya, et al., "Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions", Physical Review Letters, vol. 132, br. 22, 2024. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:096140. [Citirano: 13.09.2024.]

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Naslov (engleski)Photoproduction of 𝐾+𝐾− Pairs in Ultraperipheral Collisions
AutorS. Acharya
Autor
...
AutorSven Gotovac
Autor
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AutorDavid Karatović
Autor
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AutorNino Kovačić
Autor
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AutorPetra Lončar
Autor
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AutorMirko Planinić
Autor
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AutorNikola Poljak
Autor
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AutorLinda Vicković
Autor
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AutorN. Zurlo
KolaboracijaALICE Collaboration
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Sažetak (engleski)
𝐾+𝐾− pairs may be produced in photonuclear collisions, either from the decays of photoproduced 𝜙⁡(1020) mesons or directly as nonresonant 𝐾+𝐾− pairs. Measurements of 𝐾+𝐾− photoproduction probe the couplings between the 𝜙⁡(1020) and charged kaons with photons and nuclear targets. The kaon-proton scattering occurs at energies far above those available elsewhere. We present the first measurement of coherent photoproduction of 𝐾+𝐾− pairs on lead ions in ultraperipheral collisions using the ALICE detector, including the first investigation of direct 𝐾+𝐾− production. There is significant 𝐾+𝐾− production at low transverse momentum, consistent with coherent photoproduction on lead targets. In the mass range 1.1<𝑀𝐾𝐾<1.4  GeV/𝑐2 above the 𝜙⁡(1020) resonance, for rapidity |𝑦𝐾𝐾|<0.8 and 𝑝𝑇,𝐾𝐾<0.1  GeV/𝑐, the measured coherent photoproduction cross section is d𝜎/d𝑦=3.37±0.61(stat)±0.15(syst)  mb. The center-of-mass energy per nucleon of the photon-nucleus (Pb) system 𝑊𝛾Pb,𝑛 ranges from 33 to 188 GeV, far higher than previous measurements on heavy-nucleus targets. The cross section is larger than expected for 𝜙⁡(1020) photoproduction alone. The mass spectrum is fit to a cocktail consisting of 𝜙⁡(1020) decays, direct 𝐾+𝐾− photoproduction, and interference between the two. The confidence regions for the amplitude and relative phase angle for direct 𝐾+𝐾− photoproduction are presented.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaPhysical Review Letters
Brojčani podacivol. 132, br. 22, 222303
p-ISSN0031-9007
e-ISSN1079-7114
DOIhttps://doi.org/10.1103/PhysRevLett.132.222303
URN:NBNurn:nbn:hr:217:096140
Datum objave publikacije2024
URL dokumentahttps://link.aps.org/doi/10.1103/PhysRevLett.132.222303
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Imenovanje 4.0 međunarodna (CC BY 4.0)
Javna napomena© 2024 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by CERN. Received 8 December 2023; revised 16 February 2024; accepted 3 May 2024; published 31 May 2024.
Datum i vrijeme pohrane2024-09-13 13:05:25