PAMELA Results on the Cosmic-Ray Antiproton Flux from 60 MeV to 180 GeV in Kinetic Energy

Journal Article · Fri Sep 17 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.121101· OSTI ID:21466959

Adriani, O; Bonechi, L; Spillantini, P ^[1]; Barbarino, G C ^[2]; Bazilevskaya, G A; Kvashnin, A N; Stozhkov, Y I ^[3]; Bellotti, R; Bruno, A; Monaco, A ^[4]; Boezio, M; Bonvicini, V; Mocchiutti, E; Pizzolotto, C; Vacchi, A; Zampa, G; Zampa, N ^[5]; Bogomolov, E A; Krutkov, S Y; Vasilyev, G ^[6]

---

1. University of Florence, Department of Physics, I-50019 Sesto Fiorentino, Florence (Italy)
2. University of Naples 'Federico II', Department of Physics, I-80126 Naples (Italy)
3. Lebedev Physical Institute, RU-119991 Moscow (Russian Federation)
4. University of Bari, Department of Physics, I-70126 Bari (Italy)
5. INFN, Sezione di Trieste, I-34149 Trieste (Italy)
6. Ioffe Physical Technical Institute, RU-194021 St. Petersburg (Russian Federation)

The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and the antiproton-to-proton flux ratio which extends previously published measurements down to 60 MeV and up to 180 GeV in kinetic energy. During 850 days of data acquisition approximately 1500 antiprotons were observed. The measurements are consistent with purely secondary production of antiprotons in the Galaxy. More precise secondary production models are required for a complete interpretation of the results.

• OSTI ID: 21466959
• Journal Information: Physical Review Letters, Vol. 105, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.105.121101; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIPROTONS
COSMIC RAY DETECTION
DATA ACQUISITION
ENERGY DEPENDENCE
GEV RANGE
KINETIC ENERGY
MILKY WAY
PARTICLE PRODUCTION
PRIMARY COSMIC RADIATION
SATELLITES
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
BARYONS
COSMIC RADIATION
DETECTION
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
FERMIONS
GALAXIES
HADRONS
IONIZING RADIATIONS
MATTER
NUCLEI
NUCLEONS
PROTONS
RADIATION DETECTION
RADIATIONS