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 |
DOI | 10.1038/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 |
推荐引用方式 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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来源:高能物理研究所
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