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Direct observation of the dead-cone effect in quantum chromodynamics
http://hdl.handle.net/10935/0002005965
http://hdl.handle.net/10935/00020059651ed14b00-3c85-4dac-a9ce-76a2e80c444e
| 名前 / ファイル | ライセンス | アクション |
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https://doi.org/10.1038/s41586-022-04572-w
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| アイテムタイプ | default_学術雑誌論文 / Journal Article(1) | |||||||||||||||||
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| タイトル | ||||||||||||||||||
| タイトル | Direct observation of the dead-cone effect in quantum chromodynamics | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 言語 | ||||||||||||||||||
| 言語 | eng | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Experimental nuclear physics | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 主題Scheme | Other | |||||||||||||||||
| 主題 | Experimental particle physics | |||||||||||||||||
| 資源タイプ | ||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||
| アクセス権 | ||||||||||||||||||
| アクセス権 | metadata only access | |||||||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||||||||
| 著者 |
下村 真弥
× 下村 真弥× 稲葉 基
× 中條 達也
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| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of quantum chromodynamics (QCD)1. These partons subsequently emit further partons in a process that can be described as a parton shower2, which culminates in the formation of detectable hadrons. Studying the pattern of the parton shower is one of the key experimental tools for testing QCD. This pattern is expected to depend on the mass of the initiating parton, through a phenomenon known as the dead-cone effect, which predicts a suppression of the gluon spectrum emitted by a heavy quark of mass mQ and energy E, within a cone of angular size mQ/E around the emitter3. Previously, a direct observation of the dead-cone effect in QCD had not been possible, owing to the challenge of reconstructing the cascading quarks and gluons from the experimentally accessible hadrons. We report the direct observation of the QCD dead cone by using new iterative declustering techniques4,5 to reconstruct the parton shower of charm quarks. This result confirms a fundamental feature of QCD. Furthermore, the measurement of a dead-cone angle constitutes a direct experimental observation of the non-zero mass of the charm quark, which is a fundamental constant in the standard model of particle physics. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
en : Nature 巻 605, 号 7910, p. 440-446, 発行日 2022 |
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| 出版者 | ||||||||||||||||||
| 出版者 | Nature Research | |||||||||||||||||
| 言語 | en | |||||||||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||||||||
| 収録物識別子 | 1476-4687 | |||||||||||||||||
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| 識別子タイプ | DOI | |||||||||||||||||
| 関連識別子 | 10.1038/s41586-022-04572-w | |||||||||||||||||
| 権利 | ||||||||||||||||||
| 権利情報 | © The Authors | |||||||||||||||||
| 言語 | en | |||||||||||||||||
