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Measurement of interaction between antiprotons

文献类型:期刊论文

作者Adamczyk, L.1; Adkins, J. K.2; Agakishiev, G.3; Aggarwal, M. M.4; Ahammed, Z.5; Alekseev, I.6; Alford, J.7; Aparin, A.3; Arkhipkin, D.8; Aschenauer, E. C.8
刊名Nature
出版日期2015-11-19
卷号527期号:7578页码:345-+
ISSN号0028-0836
DOI10.1038/nature15724
通讯作者Adamczyk, l.()
英文摘要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 that has since been acquired was derived from studies made on nucleons or nuclei. although antinuclei up to antihelium-4 have been discovered(1) and their masses measured, little is known directly about the nuclear force between antinucleons. here, we study antiproton pair correlations among data collected by the star experiment(2) at the relativistic heavy ion collider (rhic)(3), where gold ions are collided with a centre-of-mass energy of 200 gigaelectronvolts per nucleon pair. antiprotons are abundantly produced in such collisions, thus making it feasible to study details of the antiproton-antiproton interaction. by applying a technique similar to hanbury brown and twiss intensity interferometry(4), we show that the force between two antiprotons is attractive. in addition, we report two key parameters that characterize the corresponding strong interaction: the scattering length and the effective range of the interaction. our measured parameters are consistent within errors with the corresponding values for proton-proton interactions. our results provide direct information on the interaction between two antiprotons, one of the simplest systems of antinucleons, and so are fundamental to understanding the structure of more-complex antinuclei and their properties.
WOS关键词EFFECTIVE RANGE PARAMETERS ; SMALL RELATIVE MOMENTA ; CORRELATION FEMTOSCOPY ; NUCLEAR COLLISIONS ; SCATTERING ; PROGRESS
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
语种英语
出版者NATURE PUBLISHING GROUP
WOS记录号WOS:000365356800049
URI标识http://www.irgrid.ac.cn/handle/1471x/2176569
专题高能物理研究所
通讯作者Adamczyk, L.
作者单位1.AGH Univ Sci & Technol, PL-30059 Krakow, Poland
2.Univ Kentucky, Lexington, KY 40506 USA
3.Joint Inst Nucl Res, Dubna 141980, Russia
4.Panjab Univ, Chandigarh 160014, India
5.Ctr Variable Energy Cyclotron, Kolkata 700064, India
6.Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia
7.Kent State Univ, Kent, OH 44242 USA
8.Brookhaven Natl Lab, Upton, NY 11973 USA
9.Natl Inst Sci Educ & Res, Bhubaneswar 751005, Orissa, India
10.Univ Houston, Houston, TX 77204 USA
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GB/T 7714
Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,et al. Measurement of interaction between antiprotons[J]. Nature,2015,527(7578):345-+.
APA Adamczyk, L..,Adkins, J. K..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,...&Zyzak, M..(2015).Measurement of interaction between antiprotons.Nature,527(7578),345-+.
MLA Adamczyk, L.,et al."Measurement of interaction between antiprotons".Nature 527.7578(2015):345-+.

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