Mass composition of ultrahigh-energy cosmic rays with the Telescope Array Surface Detector data
The results on ultrahigh-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the Boosted Decision tree (BDT) multivariate analysis built upon 14 observables related to both the properties of the shower front and the lateral distribution function. The multivariate classifier is trained with Monte-Carlo sets of events induced by the primary protons and iron. An average atomic mass of UHECR is presented for energies 10^18.0–10^20.0 eV. The average atomic mass of primary particles shows no significant energy dependence and corresponds to ⟨lnA⟩=2.0±0.1 (stat.)±0.44(syst.). The result is compared to the mass composition obtained by the Telescope Array with Xmax technique along with the results of other experiments. Possible systematic errors of the method are discussed.
2019
2020-04-27 00:25:14
1033
UHECR, Cosmic rays, composition
r6
R.U.
Abbasi
70
Jon Paul
Lundquist
70
COBISS_ID
3
12823043
DOI
15
10.1103/PhysRevD.99.022002
NUK URN
18
URN:SI:UNG:REP:OY3GVS8P
1808.03680.pdf
10556977
Predstavitvena datoteka
2020-04-27 00:25:27
0
Izvorni URL
2020-04-27 00:25:18