Measurement of the cosmic-ray antiproton-to-proton abundance ratio between 4 and 50 GeV

A. S. Beach, J. J. Beatty, A. Bhattacharyya, C. Bower, S. Coutu, M. A. DuVernois, A. W. Labrador, S. McKee, S. A. Minnick, D. Müller, J. Musser, S. Nutter, M. Schubnell, S. Swordy, G. Tarlé, A. Tomasch

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present a new measurement of the antiproton-to-proton abundance ratio, p/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precise rigidity and multiple energy loss measurement capability, was flown successfully in Spring 2000, at an average atmospheric depth of 7.2g/cm2. A total of 71 antiprotons were identified above the vertical geomagnetic cutoff rigidity of 4.2 GV. The highest measured proton energy was 81 GeV. We find that the p/p abundance ratio agrees with that expected from a purely secondary origin of antiprotons produced by primary protons with a standard soft energy spectrum.

Original languageEnglish (US)
Pages (from-to)271101-271101-4
JournalPhysical Review Letters
Volume87
Issue number27
DOIs
StatePublished - Dec 31 2001

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antiprotons
cosmic rays
rigidity
protons
balloons
proton energy
energy spectra
magnets
cut-off
energy dissipation
spectrometers

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Beach, A. S., Beatty, J. J., Bhattacharyya, A., Bower, C., Coutu, S., DuVernois, M. A., ... Tomasch, A. (2001). Measurement of the cosmic-ray antiproton-to-proton abundance ratio between 4 and 50 GeV. Physical Review Letters, 87(27), 271101-271101-4. https://doi.org/10.1103/PhysRevLett.87.271101
Beach, A. S. ; Beatty, J. J. ; Bhattacharyya, A. ; Bower, C. ; Coutu, S. ; DuVernois, M. A. ; Labrador, A. W. ; McKee, S. ; Minnick, S. A. ; Müller, D. ; Musser, J. ; Nutter, S. ; Schubnell, M. ; Swordy, S. ; Tarlé, G. ; Tomasch, A. / Measurement of the cosmic-ray antiproton-to-proton abundance ratio between 4 and 50 GeV. In: Physical Review Letters. 2001 ; Vol. 87, No. 27. pp. 271101-271101-4.
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abstract = "We present a new measurement of the antiproton-to-proton abundance ratio, p―/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precise rigidity and multiple energy loss measurement capability, was flown successfully in Spring 2000, at an average atmospheric depth of 7.2g/cm2. A total of 71 antiprotons were identified above the vertical geomagnetic cutoff rigidity of 4.2 GV. The highest measured proton energy was 81 GeV. We find that the p―/p abundance ratio agrees with that expected from a purely secondary origin of antiprotons produced by primary protons with a standard soft energy spectrum.",
author = "Beach, {A. S.} and Beatty, {J. J.} and A. Bhattacharyya and C. Bower and S. Coutu and DuVernois, {M. A.} and Labrador, {A. W.} and S. McKee and Minnick, {S. A.} and D. M{\"u}ller and J. Musser and S. Nutter and M. Schubnell and S. Swordy and G. Tarl{\'e} and A. Tomasch",
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Beach, AS, Beatty, JJ, Bhattacharyya, A, Bower, C, Coutu, S, DuVernois, MA, Labrador, AW, McKee, S, Minnick, SA, Müller, D, Musser, J, Nutter, S, Schubnell, M, Swordy, S, Tarlé, G & Tomasch, A 2001, 'Measurement of the cosmic-ray antiproton-to-proton abundance ratio between 4 and 50 GeV', Physical Review Letters, vol. 87, no. 27, pp. 271101-271101-4. https://doi.org/10.1103/PhysRevLett.87.271101

Measurement of the cosmic-ray antiproton-to-proton abundance ratio between 4 and 50 GeV. / Beach, A. S.; Beatty, J. J.; Bhattacharyya, A.; Bower, C.; Coutu, S.; DuVernois, M. A.; Labrador, A. W.; McKee, S.; Minnick, S. A.; Müller, D.; Musser, J.; Nutter, S.; Schubnell, M.; Swordy, S.; Tarlé, G.; Tomasch, A.

In: Physical Review Letters, Vol. 87, No. 27, 31.12.2001, p. 271101-271101-4.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measurement of the cosmic-ray antiproton-to-proton abundance ratio between 4 and 50 GeV

AU - Beach, A. S.

AU - Beatty, J. J.

AU - Bhattacharyya, A.

AU - Bower, C.

AU - Coutu, S.

AU - DuVernois, M. A.

AU - Labrador, A. W.

AU - McKee, S.

AU - Minnick, S. A.

AU - Müller, D.

AU - Musser, J.

AU - Nutter, S.

AU - Schubnell, M.

AU - Swordy, S.

AU - Tarlé, G.

AU - Tomasch, A.

PY - 2001/12/31

Y1 - 2001/12/31

N2 - We present a new measurement of the antiproton-to-proton abundance ratio, p―/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precise rigidity and multiple energy loss measurement capability, was flown successfully in Spring 2000, at an average atmospheric depth of 7.2g/cm2. A total of 71 antiprotons were identified above the vertical geomagnetic cutoff rigidity of 4.2 GV. The highest measured proton energy was 81 GeV. We find that the p―/p abundance ratio agrees with that expected from a purely secondary origin of antiprotons produced by primary protons with a standard soft energy spectrum.

AB - We present a new measurement of the antiproton-to-proton abundance ratio, p―/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precise rigidity and multiple energy loss measurement capability, was flown successfully in Spring 2000, at an average atmospheric depth of 7.2g/cm2. A total of 71 antiprotons were identified above the vertical geomagnetic cutoff rigidity of 4.2 GV. The highest measured proton energy was 81 GeV. We find that the p―/p abundance ratio agrees with that expected from a purely secondary origin of antiprotons produced by primary protons with a standard soft energy spectrum.

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