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Title:Search for photons above 1019 eV with the surface detector of the Pierre Auger Observatory
Authors:ID Abreu, P. (Author)
ID Filipčič, Andrej (Author)
ID Lundquist, Jon Paul (Author)
ID Shivashankara, Shima Ujjani (Author)
ID Stanič, Samo (Author)
ID Vorobiov, Serguei (Author)
ID Zavrtanik, Danilo (Author)
ID Zavrtanik, Marko (Author)
ID Zehrer, Lukas (Author), et al.
Files:URL https://iopscience.iop.org/article/10.1088/1475-7516/2023/05/021
 
.pdf Abreu_2023_J._Cosmol._Astropart._Phys._2023_021.pdf (2,46 MB)
MD5: 0663DE568AD1B7183CF4596E7200D50A
 
URL https://doi.org/10.1088/1475-7516/2023/05/021
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:We use the surface detector of the Pierre Auger Observatory to search for air showers initiated by photons with an energy above 10[sup]19 eV. Photons in the zenith angle range from 30 deg. to 60 deg. can be identified in the overwhelming background of showers initiated by charged cosmic rays through the broader time structure of the signals induced in the water-Cherenkov detectors of the array and the steeper lateral distribution of shower particles reaching ground. Applying the search method to data collected between January 2004 and June 2020, upper limits at 95% CL are set to an E[sup]-2 diffuse flux of ultra-high energy photons above 10[sup]19 eV, 2 × 10[sup]19 eV and 4 × 10[sup]19 eV amounting to 2.11 × 10[sup]-3, 3.12 × 10[sup]-4 and 1.72 × 10[sup]-4 km-2 sr-1 yr-1, respectively. While the sensitivity of the present search around 2 × 10[sup]19 eV approaches expectations of cosmogenic photon fluxes in the case of a pure-proton composition, it is one order of magnitude above those from more realistic mixed-composition models. The inferred limits have also implications for the search of super-heavy dark matter that are discussed and illustrated.
Keywords:ultra-high-energy cosmic rays, UHE photons, Pierre Auger Observatory, extensive air showers, water Cherenkov detectors
Publication status:Published
Publication version:Version of Record
Publication date:01.05.2023
Year of publishing:2023
Number of pages:str. 1-24
Numbering:Vol. 2023, no. 5, [article no.] 021
PID:20.500.12556/RUNG-8344-9752b62b-ce75-126b-3644-be3ad0e385b4 New window
COBISS.SI-ID:161596675 New window
UDC:52
ISSN on article:1475-7516
DOI:10.1088/1475-7516/2023/05/021 New window
NUK URN:URN:SI:UNG:REP:OF9VYJWQ
Publication date in RUNG:18.08.2023
Views:2082
Downloads:20
Metadata:XML DC-XML DC-RDF
:
ABREU, P., FILIPČIČ, Andrej, LUNDQUIST, Jon Paul, SHIVASHANKARA, Shima Ujjani, STANIČ, Samo, VOROBIOV, Serguei, ZAVRTANIK, Danilo, ZAVRTANIK, Marko and ZEHRER, Lukas, 2023, Search for photons above ▫$10^19$▫ eV with the surface detector of the Pierre Auger Observatory. Journal of cosmology and astroparticle physics [online]. 2023. Vol. 2023, no. 5,  021, p. 1–24. [Accessed 7 April 2025]. DOI 10.1088/1475-7516/2023/05/021. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=8344
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Record is a part of a journal

Title:Journal of cosmology and astroparticle physics
Publisher:Institute of Physics Pub.
ISSN:1475-7516
COBISS.SI-ID:389627 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0031
Name:Večglasniška astrofizika

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

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