Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation

J.W. Mitchell; L.M. Barbier; E.R. Christian; J.F. Krizmanic; K. Krombel; J.F. Ormes; R.E. Streitmatter; A.W. Labrador; A.J. Davis; R.A. Mewaldt; S.M. Schindler; R.L. Golden; S.J. Stochaj; W.R. Webber; W. Menn; M. Hof; O. Reimer; M. Simon; Ib Lundgaard Rasmussen

doi:10.1103/PhysRevLett.76.3057

Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation

J.W. Mitchell, L.M. Barbier, E.R. Christian, J.F. Krizmanic, K. Krombel, J.F. Ormes, R.E. Streitmatter, A.W. Labrador, A.J. Davis, R.A. Mewaldt, S.M. Schindler, R.L. Golden, S.J. Stochaj, W.R. Webber, W. Menn, M. Hof, O. Reimer, M. Simon, Ib Lundgaard Rasmussen

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Abstract

The balloon-borne Isotope Matter-Antimatter Experiment (IMAX) was flown from Lynn Lake, Manitoba, Canada on 16-17 July 1992. Using velocity and magnetic rigidity to determine mass, we have directly measured the abundances of cosmic ray antiprotons and protons in the energy range from 0.25 to 3.2 GeV. Both the absolute flux of antiprotons and the antiproton/proton ratio are consistent with recent theoretical work in which antiprotons are produced as secondary products of cosmic ray interactions with the interstellar medium. This consistency implies a lower limit to the antiproton lifetime of similar to 10(7) yr.

Original language	English
Journal	Physical Review Letters
Volume	76
Issue number	17
Pages (from-to)	3057-3060
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.76.3057
Publication status	Published - 1996

Bibliographical note

Copyright (1996) American Physical Society.

Keywords

RAY
PROTON RATIO
MODULATION
SPECTROMETER

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Mitchell, J. W., Barbier, L. M., Christian, E. R., Krizmanic, J. F., Krombel, K., Ormes, J. F., Streitmatter, R. E., Labrador, A. W., Davis, A. J., Mewaldt, R. A., Schindler, S. M., Golden, R. L., Stochaj, S. J., Webber, W. R., Menn, W., Hof, M., Reimer, O., Simon, M., & Rasmussen, I. L. (1996). Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation. Physical Review Letters, 76(17), 3057-3060. https://doi.org/10.1103/PhysRevLett.76.3057

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abstract = "The balloon-borne Isotope Matter-Antimatter Experiment (IMAX) was flown from Lynn Lake, Manitoba, Canada on 16-17 July 1992. Using velocity and magnetic rigidity to determine mass, we have directly measured the abundances of cosmic ray antiprotons and protons in the energy range from 0.25 to 3.2 GeV. Both the absolute flux of antiprotons and the antiproton/proton ratio are consistent with recent theoretical work in which antiprotons are produced as secondary products of cosmic ray interactions with the interstellar medium. This consistency implies a lower limit to the antiproton lifetime of similar to 10(7) yr.",

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author = "J.W. Mitchell and L.M. Barbier and E.R. Christian and J.F. Krizmanic and K. Krombel and J.F. Ormes and R.E. Streitmatter and A.W. Labrador and A.J. Davis and R.A. Mewaldt and S.M. Schindler and R.L. Golden and S.J. Stochaj and W.R. Webber and W. Menn and M. Hof and O. Reimer and M. Simon and Rasmussen, \{Ib Lundgaard\}",

note = "Copyright (1996) American Physical Society.",

year = "1996",

doi = "10.1103/PhysRevLett.76.3057",

language = "English",

volume = "76",

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Mitchell, JW, Barbier, LM, Christian, ER, Krizmanic, JF, Krombel, K, Ormes, JF, Streitmatter, RE, Labrador, AW, Davis, AJ, Mewaldt, RA, Schindler, SM, Golden, RL, Stochaj, SJ, Webber, WR, Menn, W, Hof, M, Reimer, O, Simon, M & Rasmussen, IL 1996, 'Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation', Physical Review Letters, vol. 76, no. 17, pp. 3057-3060. https://doi.org/10.1103/PhysRevLett.76.3057

TY - JOUR

T1 - Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation

AU - Mitchell, J.W.

AU - Barbier, L.M.

AU - Christian, E.R.

AU - Krizmanic, J.F.

AU - Krombel, K.

AU - Ormes, J.F.

AU - Streitmatter, R.E.

AU - Labrador, A.W.

AU - Davis, A.J.

AU - Mewaldt, R.A.

AU - Schindler, S.M.

AU - Golden, R.L.

AU - Stochaj, S.J.

AU - Webber, W.R.

AU - Menn, W.

AU - Hof, M.

AU - Reimer, O.

AU - Simon, M.

AU - Rasmussen, Ib Lundgaard

PY - 1996

Y1 - 1996

N2 - The balloon-borne Isotope Matter-Antimatter Experiment (IMAX) was flown from Lynn Lake, Manitoba, Canada on 16-17 July 1992. Using velocity and magnetic rigidity to determine mass, we have directly measured the abundances of cosmic ray antiprotons and protons in the energy range from 0.25 to 3.2 GeV. Both the absolute flux of antiprotons and the antiproton/proton ratio are consistent with recent theoretical work in which antiprotons are produced as secondary products of cosmic ray interactions with the interstellar medium. This consistency implies a lower limit to the antiproton lifetime of similar to 10(7) yr.

AB - The balloon-borne Isotope Matter-Antimatter Experiment (IMAX) was flown from Lynn Lake, Manitoba, Canada on 16-17 July 1992. Using velocity and magnetic rigidity to determine mass, we have directly measured the abundances of cosmic ray antiprotons and protons in the energy range from 0.25 to 3.2 GeV. Both the absolute flux of antiprotons and the antiproton/proton ratio are consistent with recent theoretical work in which antiprotons are produced as secondary products of cosmic ray interactions with the interstellar medium. This consistency implies a lower limit to the antiproton lifetime of similar to 10(7) yr.

KW - RAY

KW - PROTON RATIO

KW - MODULATION

KW - SPECTROMETER

U2 - 10.1103/PhysRevLett.76.3057

DO - 10.1103/PhysRevLett.76.3057

M3 - Journal article

C2 - 10060865

SN - 0031-9007

VL - 76

SP - 3057

EP - 3060

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

ER -

Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation

Abstract

Bibliographical note

Keywords

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