First Observation of an Attractive Interaction between a Proton and a Cascade Baryon
文献类型：期刊论文
| 作者 | Acharya, S; Adamova, D; Adhya, SP; Adler, A; Adolfsson, J; Aggarwal, MM; Rinella, GA; Agnello, M; Agrawal, N; Ahammed, Z |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2019 |
| 卷号 | 123期号:11页码:- |
| 关键词 | BOUND-STATE COLLISIONS |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.123.112002 |
| 文献子类 | 期刊论文 |
| 英文摘要 | This Letter presents the first experimental observation of the attractive strong interaction between a proton and a multistrange baryon (hyperon) Xi(-). The result is extracted from two-particle correlations of combined p-Xi(-) circle plus (p) over bar-(Xi) over bar (+) pairs measured in p-Pb collisions at root S-NN = 5.02 TeV at the LHC with ALICE. The measured correlation function is compared with the prediction obtained assuming only an attractive Coulomb interaction and a standard deviation in the range [3.6, 5.3] is found. Since the measured p-Xi(-)circle plus(p) over bar-(Xi) over bar (+) correlation is significantly enhanced with respect to the Coulomb prediction, the presence of an additional, strong, attractive interaction is evident. The data are compatible with recent lattice calculations by the HAL-QCD Collaboration, with a standard deviation in the range [1.8, 3.7]. The lattice potential predicts a shallow repulsive Xi(-). interaction within pure neutron matter and this implies stiffer equations of state for neutron-rich matter including hyperons. Implications of the strong interaction for the modeling of neutron stars are discussed. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32061]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.ISS, Magurele, Romania; 2.Inha Univ, Incheon, South Korea; 3.Yerevan Phys Inst Fdn, Alikhanyan Natl Sci Lab, Yerevan, Armenia; 4.Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine; 5.Bose Inst, Dept Phys, Kolkata, W Bengal, India; 6.Ctr Astroparticle Phys & Space Sci, Kolkata, W Bengal, India; 7.Budker Inst Nucl Phys, Novosibirsk, Russia; 8.Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA USA; 9.Cent China Normal Univ, Wuhan, Hubei, Peoples R China; 10.IN2P3, Ctr Calcul, Villeurbanne, France; |
| 推荐引用方式 GB/T 7714 | Acharya, S,Adamova, D,Adhya, SP,et al. First Observation of an Attractive Interaction between a Proton and a Cascade Baryon[J]. PHYSICAL REVIEW LETTERS,2019,123(11):-. |
| APA | Acharya, S.,Adamova, D.,Adhya, SP.,Adler, A.,Adolfsson, J.,...&Zurlo, N.(2019).First Observation of an Attractive Interaction between a Proton and a Cascade Baryon.PHYSICAL REVIEW LETTERS,123(11),-. |
| MLA | Acharya, S,et al."First Observation of an Attractive Interaction between a Proton and a Cascade Baryon".PHYSICAL REVIEW LETTERS 123.11(2019):-. |
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来源：上海应用物理研究所
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