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Naslov:Search for photons above ▫$10^{18}$▫ eV by simultaneously measuring the atmospheric depth and the muon content of air showers at the Pierre Auger Observatory
Avtorji:ID Abdul Halim, A. (Avtor)
ID Filipčič, Andrej (Avtor)
ID Lundquist, Jon Paul (Avtor)
ID Shivashankara, Shima Ujjani (Avtor)
ID Stanič, Samo (Avtor)
ID Vorobiov, Serguei (Avtor)
ID Zavrtanik, Danilo (Avtor)
ID Zavrtanik, Marko (Avtor), et al.
Datoteke:.pdf PhysRevD.110.062005.pdf (4,39 MB)
MD5: 25E91FBF3C6359800E2B9DE9D833EBF3
 
URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.062005
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:The Pierre Auger Observatory is the most sensitive instrument to detect photons with energies above 1⁢0[sup]17  eV. It measures extensive air showers generated by ultrahigh energy cosmic rays using a hybrid technique that exploits the combination of a fluorescence detector with a ground array of particle detectors. The signatures of a photon-induced air shower are a larger atmospheric depth of the shower maximum (�max) and a steeper lateral distribution function, along with a lower number of muons with respect to the bulk of hadron-induced cascades. In this work, a new analysis technique in the energy interval between 1 and 30 EeV (1  EeV=1⁢0[sup]18  eV) has been developed by combining the fluorescence detector-based measurement of �max with the specific features of the surface detector signal through a parameter related to the air shower muon content, derived from the universality of the air shower development. No evidence of a statistically significant signal due to photon primaries was found using data collected in about 12 years of operation. Thus, upper bounds to the integral photon flux have been set using a detailed calculation of the detector exposure, in combination with a data-driven background estimation. The derived 95% confidence level upper limits are 0.0403, 0.01113, 0.0035, 0.0023, and 0.0021  km[sup]−2 sr[sup]−1 yr[sup]−1 above 1, 2, 3, 5, and 10 EeV, respectively, leading to the most stringent upper limits on the photon flux in the EeV range. Compared with past results, the upper limits were improved by about 40% for the lowest energy threshold and by a factor 3 above 3 EeV, where no candidates were found and the expected background is negligible. The presented limits can be used to probe the assumptions on chemical composition of ultrahigh energy cosmic rays and allow for the constraint of the mass and lifetime phase space of super-heavy dark matter particles.
Ključne besede:ultra-high-energy photons, ultra-high-energy cosmic rays, Pierre Auger Observatory, extensive air showers
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2024
Leto izida:2024
Št. strani:str. 1-21
Številčenje:Vol. 110, issue 6, [article no.] 062005
PID:20.500.12556/RUNG-9369 Novo okno
COBISS.SI-ID:209464835 Novo okno
UDK:52
ISSN pri članku:2470-0010
DOI:10.1103/PhysRevD.110.062005 Novo okno
NUK URN:URN:SI:UNG:REP:HAWVHR9U
Datum objave v RUNG:30.09.2024
Število ogledov:263
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Physical review
Skrajšan naslov:Phys. rev., D
Založnik:American Physical Society
ISSN:2470-0010
COBISS.SI-ID:29757223 Novo okno

Gradivo je financirano iz projekta

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:P1-0031
Naslov:Večglasniška astrofizika

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:P1-0385
Naslov:Daljinsko zaznavanje atmosferskih lastnosti

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:I0-0033
Naslov:Infrastrukturni program Univerze v Novi Gorici

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:N1-0111
Naslov:Identifikacija izvorov kozmičnih žarkov med aktivnimi galaksijami s curki

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

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