Measurement of Cosmic Ray spectrum and Anisotropy with ARGO-YBJ

TL;DR

This paper reports on ARGO-YBJ's observations of cosmic ray anisotropy at various scales, discovering new excesses and measuring the light-component spectrum between 5 and 200 TeV, advancing understanding of cosmic ray origins.

Contribution

It presents the first evidence of new small-scale anisotropy excesses and provides the measurement of the primary cosmic ray light component spectrum in the 5-200 TeV range.

Findings

Detection of new few-degree anisotropy excesses across the sky region.

Measurement of the light-component (p+He) spectrum from 5 to 200 TeV.

Identification of anisotropic features at different angular scales.

Abstract

In this paper we report on the observation of the anisotropy of cosmic ray arrival direction at different angular scales with ARGO-YBJ. Evidence of new few-degree excesses throughout the sky region 195$^{\circ}\leq$ R.A. $\leq$ 315$^{\circ}$ is presented for the first time. We report also on the measurement of the light-component (p+He) spectrum of primary cosmic rays in the range 5 - 200 TeV.