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          Institute: MPI für Physik     Collection: YB 2016     Display Documents



ID: 716323.0, MPI für Physik / YB 2016
Measurement of Interaction Between Antiprotons
Authors:STAR Collaboration; Adamczyk, L.; Schmitz, N.; Seyboth, P.; et al.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Nature
Journal Abbrev.:Nature
Issue / Number:527
Start Page:345
End Page:348
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:One of the primary goals of nuclear physics is to understand the force between nucleons, which is a necessary step for understanding the structure of nuclei and how nuclei interact with each other. Rutherford discovered the atomic nucleus in 1911, and the large body of knowledge about the nuclear force since acquired was derived from studies made on nucleons or nuclei. Although antinuclei up to antihelium-4 have been discovered and their masses measured, we have no direct knowledge of the nuclear force between antinucleons. Here, we study antiproton pair correlations among data taken by the STAR experiment at the Relativistic Heavy Ion Collider and show that the force between two antiprotons is attractive. In addition, we report two key parameters that characterize the corresponding strong interaction: namely, the scattering length (f0) and effective range (d0). As direct information on the interaction between two antiprotons, one of the simplest systems of antinucleons, our result provides a fundamental ingredient for understanding the structure of more complex antinuclei and their properties.
Classification / Thesaurus:STAR
Comment of the Author/Creator:25 pages, 4 figures. Submitted to Nature. Under media embargo
External Publication Status:published
Document Type:Article
Communicated by:MPI für Physik
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2015-363
URL:http://inspirehep.net/search?p=find+eprint+1507.07...
URL:http://arXiv.org/abs/arxiv:1507.07158
URL:https://publications.mppmu.mpg.de/?action=search&m...
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