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A New Limit on the Flux of Cosmic Antihelium
A very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of BESS magnetic rigidity spectrometer. We have not observed any antihelium; this places a model-independent upper limit (95 % C.L.) on the antihelium flux of 6*10**(-4) m**(-2)sr**(-1)s...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
1998
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0370-2693(98)00131-2 http://cds.cern.ch/record/336649 |
| _version_ | 1780891327351750656 |
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| author | Saeki, T Anraku, K Orito, S Ormes, J F Imori, M Kimbell, B L Makida, Y Matsumoto, H Matsunaga, H Mitchell, J Motoki, M Nishimura, J Nozaki, M Otoba, M Sanuki, T Streitmatter, R E Suzuki, J Tanaka, K Ueda, I Yajima, N Yamagami, T Yamamoto, A Yoshida, T Yoshimura, K |
| author_facet | Saeki, T Anraku, K Orito, S Ormes, J F Imori, M Kimbell, B L Makida, Y Matsumoto, H Matsunaga, H Mitchell, J Motoki, M Nishimura, J Nozaki, M Otoba, M Sanuki, T Streitmatter, R E Suzuki, J Tanaka, K Ueda, I Yajima, N Yamagami, T Yamamoto, A Yoshida, T Yoshimura, K |
| author_sort | Saeki, T |
| collection | CERN |
| description | A very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of BESS magnetic rigidity spectrometer. We have not observed any antihelium; this places a model-independent upper limit (95 % C.L.) on the antihelium flux of 6*10**(-4) m**(-2)sr**(-1)s**(-1) at the top of the atmosphere in the rigidity region 1 to 16 GV, after correcting for the estimated interaction loss of antihelium in the air and in the instrument. The corresponding upper limit on the Hebar/He flux ratio is 3.1*10**(-6), 30 times more stringent than the limits obtained in similar rigidity regions with magnetic spectrometers previous to BESS. |
| id | cern-336649 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1998 |
| record_format | invenio |
| spelling | cern-3366492019-09-30T06:29:59Zdoi:10.1016/S0370-2693(98)00131-2http://cds.cern.ch/record/336649engSaeki, TAnraku, KOrito, SOrmes, J FImori, MKimbell, B LMakida, YMatsumoto, HMatsunaga, HMitchell, JMotoki, MNishimura, JNozaki, MOtoba, MSanuki, TStreitmatter, R ESuzuki, JTanaka, KUeda, IYajima, NYamagami, TYamamoto, AYoshida, TYoshimura, KA New Limit on the Flux of Cosmic AntiheliumAstrophysics and AstronomyA very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of BESS magnetic rigidity spectrometer. We have not observed any antihelium; this places a model-independent upper limit (95 % C.L.) on the antihelium flux of 6*10**(-4) m**(-2)sr**(-1)s**(-1) at the top of the atmosphere in the rigidity region 1 to 16 GV, after correcting for the estimated interaction loss of antihelium in the air and in the instrument. The corresponding upper limit on the Hebar/He flux ratio is 3.1*10**(-6), 30 times more stringent than the limits obtained in similar rigidity regions with magnetic spectrometers previous to BESS.astro-ph/9710228oai:cds.cern.ch:3366491998 |
| spellingShingle | Astrophysics and Astronomy Saeki, T Anraku, K Orito, S Ormes, J F Imori, M Kimbell, B L Makida, Y Matsumoto, H Matsunaga, H Mitchell, J Motoki, M Nishimura, J Nozaki, M Otoba, M Sanuki, T Streitmatter, R E Suzuki, J Tanaka, K Ueda, I Yajima, N Yamagami, T Yamamoto, A Yoshida, T Yoshimura, K A New Limit on the Flux of Cosmic Antihelium |
| title | A New Limit on the Flux of Cosmic Antihelium |
| title_full | A New Limit on the Flux of Cosmic Antihelium |
| title_fullStr | A New Limit on the Flux of Cosmic Antihelium |
| title_full_unstemmed | A New Limit on the Flux of Cosmic Antihelium |
| title_short | A New Limit on the Flux of Cosmic Antihelium |
| title_sort | new limit on the flux of cosmic antihelium |
| topic | Astrophysics and Astronomy |
| url | https://dx.doi.org/10.1016/S0370-2693(98)00131-2 http://cds.cern.ch/record/336649 |
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