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Study of cosmic ray events with high muon multiplicity using the ALICE detector at the CERN Large Hadron Collider
http://hdl.handle.net/2241/00137655
http://hdl.handle.net/2241/00137655c2eb780c-8867-4091-ba51-9bb07b17e6c2
名前 / ファイル | ライセンス | アクション |
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JCAP_2016-1-32 (1.6 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2016-03-24 | |||||
タイトル | ||||||
タイトル | Study of cosmic ray events with high muon multiplicity using the ALICE detector at the CERN Large Hadron Collider | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
ALICE collaboration
× ALICE collaboration× Busch, O.× Chujo, T.× Esumi, S.× Miake, Y. |
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著者別名 |
ブッシュ, オリバー
× ブッシュ, オリバー× 中條, 達也× 江角, 晋一× 三明, 康郎 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | ALICE is one of four large experiments at the CERN Large Hadron Collider near Geneva, specially designed to study particle production in ultra-relativistic heavy-ion collisions. Located 52 meters underground with 28 meters of overburden rock, it has also been used to detect muons produced by cosmic ray interactions in the upper atmosphere. In this paper, we present the multiplicity distribution of these atmospheric muons and its comparison with Monte Carlo simulations. This analysis exploits the large size and excellent tracking capability of the ALICE Time Projection Chamber. A special emphasis is given to the study of high multiplicity events containing more than 100 reconstructed muons and corresponding to a muon areal density ρμ > 5.9 m−2. Similar events have been studied in previous underground experiments such as ALEPH and DELPHI at LEP. While these experiments were able to reproduce the measured muon multiplicity distribution with Monte Carlo simulations at low and intermediate multiplicities, their simulations failed to describe the frequency of the highest multiplicity events. In this work we show that the high multiplicity events observed in ALICE stem from primary cosmic rays with energies above 1016 eV and that the frequency of these events can be successfully described by assuming a heavy mass composition of primary cosmic rays in this energy range. The development of the resulting air showers was simulated using the latest version of QGSJET to model hadronic interactions. This observation places significant constraints on alternative, more exotic, production mechanisms for these events. | |||||
書誌情報 |
Journal of Cosmology and Astroparticle Physics 巻 2016, 号 1, p. 32, 発行日 2016-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1475-7516 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1088/1475-7516/2016/01/032 | |||||
権利 | ||||||
権利情報 | © 2016 CERN for the benefit of the ALICE Collaboration. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | IOP Publishing |