Abstract
We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-p-bar instrument in the spring of 2000. The data presented here are compatible with our previous measurements, obtained with a different instrument. The combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5 GeV. We compare the new measurement with earlier data obtained with the HEAT-e{sup {+-}} instrument, during the opposite epoch of the solar cycle, and conclude that our measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV.
Beatty, J J;
Coutu, S;
DuVernois, M A;
Minnick, S A;
[1]
Bhattacharyya, A;
Bower, C;
Musser, J;
[2]
McKee, S;
Schubnell, M;
Tarle, G;
Tomasch, A;
[3]
Mueller, D;
Labrador, A W;
Swordy, S;
[4]
Nutter, S
[5]
- Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
- Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)
- Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)
- Department of Physics and Geology, Northern Kentucky University, Highland Heights, Kentucky 41099 (United States)
Citation Formats
Beatty, J J, Coutu, S, DuVernois, M A, Minnick, S A, Bhattacharyya, A, Bower, C, Musser, J, McKee, S, Schubnell, M, Tarle, G, Tomasch, A, Mueller, D, Labrador, A W, Swordy, S, and Nutter, S.
New measurement of the cosmic-ray positron fraction from 5 to 15 GeV.
United States: N. p.,
2004.
Web.
doi:10.1103/PhysRevLett.93.241102.
Beatty, J J, Coutu, S, DuVernois, M A, Minnick, S A, Bhattacharyya, A, Bower, C, Musser, J, McKee, S, Schubnell, M, Tarle, G, Tomasch, A, Mueller, D, Labrador, A W, Swordy, S, & Nutter, S.
New measurement of the cosmic-ray positron fraction from 5 to 15 GeV.
United States.
https://doi.org/10.1103/PhysRevLett.93.241102
Beatty, J J, Coutu, S, DuVernois, M A, Minnick, S A, Bhattacharyya, A, Bower, C, Musser, J, McKee, S, Schubnell, M, Tarle, G, Tomasch, A, Mueller, D, Labrador, A W, Swordy, S, and Nutter, S.
2004.
"New measurement of the cosmic-ray positron fraction from 5 to 15 GeV."
United States.
https://doi.org/10.1103/PhysRevLett.93.241102.
@misc{etde_20621552,
title = {New measurement of the cosmic-ray positron fraction from 5 to 15 GeV}
author = {Beatty, J J, Coutu, S, DuVernois, M A, Minnick, S A, Bhattacharyya, A, Bower, C, Musser, J, McKee, S, Schubnell, M, Tarle, G, Tomasch, A, Mueller, D, Labrador, A W, Swordy, S, and Nutter, S}
abstractNote = {We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-p-bar instrument in the spring of 2000. The data presented here are compatible with our previous measurements, obtained with a different instrument. The combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5 GeV. We compare the new measurement with earlier data obtained with the HEAT-e{sup {+-}} instrument, during the opposite epoch of the solar cycle, and conclude that our measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV.}
doi = {10.1103/PhysRevLett.93.241102}
journal = []
issue = {24}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Dec}
}
title = {New measurement of the cosmic-ray positron fraction from 5 to 15 GeV}
author = {Beatty, J J, Coutu, S, DuVernois, M A, Minnick, S A, Bhattacharyya, A, Bower, C, Musser, J, McKee, S, Schubnell, M, Tarle, G, Tomasch, A, Mueller, D, Labrador, A W, Swordy, S, and Nutter, S}
abstractNote = {We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-p-bar instrument in the spring of 2000. The data presented here are compatible with our previous measurements, obtained with a different instrument. The combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5 GeV. We compare the new measurement with earlier data obtained with the HEAT-e{sup {+-}} instrument, during the opposite epoch of the solar cycle, and conclude that our measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV.}
doi = {10.1103/PhysRevLett.93.241102}
journal = []
issue = {24}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Dec}
}