{"title":"在大型强子对撞机上探索三体系统的强相互作用","authors":"S. Acharyaet al.(ALICE Collaboration)","doi":"10.1103/physrevx.14.031051","DOIUrl":null,"url":null,"abstract":"Deuterons are atomic nuclei composed of a neutron and a proton held together by the strong interaction. Unbound ensembles composed of a deuteron and a third nucleon have been investigated in the past using scattering experiments, and they constitute a fundamental reference in nuclear physics to constrain nuclear interactions and the properties of nuclei. In this work, <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><mtext>−</mtext><mi>d</mi></mrow></math> and <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>p</mi><mtext>−</mtext><mi>d</mi></mrow></math> femtoscopic correlations measured by the ALICE Collaboration in proton-proton (<math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>p</mi><mi>p</mi></math>) collisions at <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></mrow></math> at the Large Hadron Collider (LHC) are presented. It is demonstrated that correlations in momentum space between deuterons and kaons or protons allow us to study three-hadron systems at distances comparable with the proton radius. The analysis of the <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><mtext>−</mtext><mi>d</mi></mrow></math> correlation shows that the relative distances at which deuterons and protons or kaons are produced are around 2 fm. The analysis of the <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>p</mi><mtext>−</mtext><mi>d</mi></mrow></math> correlation shows that only a full three-body calculation that accounts for the internal structure of the deuteron can explain the data. In particular, the sensitivity of the observable to the short-range part of the interaction is demonstrated. These results indicate that correlations involving light nuclei in <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>p</mi><mi>p</mi></math> collisions at the LHC will also provide access to any three-body system in the strange and charm sectors.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":null,"pages":null},"PeriodicalIF":11.6000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Exploring the Strong Interaction of Three-Body Systems at the LHC\",\"authors\":\"S. Acharyaet al.(ALICE Collaboration)\",\"doi\":\"10.1103/physrevx.14.031051\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Deuterons are atomic nuclei composed of a neutron and a proton held together by the strong interaction. Unbound ensembles composed of a deuteron and a third nucleon have been investigated in the past using scattering experiments, and they constitute a fundamental reference in nuclear physics to constrain nuclear interactions and the properties of nuclei. In this work, <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><mtext>−</mtext><mi>d</mi></mrow></math> and <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi>p</mi><mtext>−</mtext><mi>d</mi></mrow></math> femtoscopic correlations measured by the ALICE Collaboration in proton-proton (<math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mi>p</mi><mi>p</mi></math>) collisions at <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn><mtext> </mtext><mtext> </mtext><mi>TeV</mi></mrow></math> at the Large Hadron Collider (LHC) are presented. It is demonstrated that correlations in momentum space between deuterons and kaons or protons allow us to study three-hadron systems at distances comparable with the proton radius. The analysis of the <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><mtext>−</mtext><mi>d</mi></mrow></math> correlation shows that the relative distances at which deuterons and protons or kaons are produced are around 2 fm. The analysis of the <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi>p</mi><mtext>−</mtext><mi>d</mi></mrow></math> correlation shows that only a full three-body calculation that accounts for the internal structure of the deuteron can explain the data. In particular, the sensitivity of the observable to the short-range part of the interaction is demonstrated. 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引用次数: 0
摘要
氘核是由一个中子和一个质子通过强相互作用结合在一起的原子核。过去曾利用散射实验研究过由一个氘核和第三个核子组成的非束缚集合,它们构成了核物理中约束核相互作用和原子核性质的基本参考。在这项工作中,介绍了 ALICE 协作体在大型强子对撞机(LHC)s=13 TeV 的质子-质子(pp)对撞中测量到的 K+-d 和 p-d 飞秒相关性。研究表明,氘核与高子或质子之间动量空间的相关性使我们能够在与质子半径相当的距离上研究三中子系统。对 K+-d 关联性的分析表明,氘核和质子或 ka 子产生的相对距离约为 2 fm。对 p-d 相关性的分析表明,只有考虑到氘核内部结构的完整三体计算才能解释数据。特别是,观测数据对相互作用短程部分的敏感性得到了证明。这些结果表明,在大型强子对撞机的pp对撞中,涉及轻核的相关性也将为奇异和粲部门的任何三体系统提供通道。
Exploring the Strong Interaction of Three-Body Systems at the LHC
Deuterons are atomic nuclei composed of a neutron and a proton held together by the strong interaction. Unbound ensembles composed of a deuteron and a third nucleon have been investigated in the past using scattering experiments, and they constitute a fundamental reference in nuclear physics to constrain nuclear interactions and the properties of nuclei. In this work, and femtoscopic correlations measured by the ALICE Collaboration in proton-proton () collisions at at the Large Hadron Collider (LHC) are presented. It is demonstrated that correlations in momentum space between deuterons and kaons or protons allow us to study three-hadron systems at distances comparable with the proton radius. The analysis of the correlation shows that the relative distances at which deuterons and protons or kaons are produced are around 2 fm. The analysis of the correlation shows that only a full three-body calculation that accounts for the internal structure of the deuteron can explain the data. In particular, the sensitivity of the observable to the short-range part of the interaction is demonstrated. These results indicate that correlations involving light nuclei in collisions at the LHC will also provide access to any three-body system in the strange and charm sectors.
期刊介绍:
Physical Review X (PRX) stands as an exclusively online, fully open-access journal, emphasizing innovation, quality, and enduring impact in the scientific content it disseminates. Devoted to showcasing a curated selection of papers from pure, applied, and interdisciplinary physics, PRX aims to feature work with the potential to shape current and future research while leaving a lasting and profound impact in their respective fields. Encompassing the entire spectrum of physics subject areas, PRX places a special focus on groundbreaking interdisciplinary research with broad-reaching influence.