Strange fireball as an explanation of the muon excess in Auger data
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00539900" target="_blank" >RIV/68378271:_____/17:00539900 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevD.95.063005" target="_blank" >https://doi.org/10.1103/PhysRevD.95.063005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.95.063005" target="_blank" >10.1103/PhysRevD.95.063005</a>
Alternative languages
Result language
angličtina
Original language name
Strange fireball as an explanation of the muon excess in Auger data
Original language description
We argue that ultrahigh-energy cosmic-ray collisions in Earth's atmosphere can probe the strange quark density of the nucleon. These collisions have center-of-mass energies greater than or similar to 10(4.6)A GeV, where A >= 14 is the nuclear baryon number. We hypothesize the formation of a deconfined thermal fireball which undergoes a sudden hadronization. At production the fireball has a very high matter density and consists of gluons and two flavors of light quarks (u, d). Because the fireball is formed in the baryon-rich projectile fragmentation region, the high baryochemical potential damps the production of uu and dd pairs, resulting in gluon fragmentation mainly into ss. The strange quarks then become much more abundant and upon hadronization the relative density of strange hadrons is significantly enhanced over that resulting from a hadron gas. Assuming the momentum distribution functions can be approximated by Fermi-Dirac and Bose-Einstein statistics, we estimate a kaon-to-pion ratio of about 3 and expect a similar (total) baryon-topion ratio. We show that, if this were the case, the excess of strange hadrons would suppress the fraction of energy which is transferred to decaying pi(0)'s by about 20%, yielding an similar to 40% enhancement of the muon content in atmospheric cascades, in agreement with recent data reported by the Pierre Auger Collaboration.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
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Continuities
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Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
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Volume of the periodical
95
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
1-14
UT code for WoS article
000396031400002
EID of the result in the Scopus database
2-s2.0-85020137441