Measurement of Antiproton Production in p-He Collisions at sqrt[s_{NN}]=110 GeV.
Measurement of Antiproton Production in p-He Collisions at sqrt[s_{NN}]=110 GeV.
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DOI：
10.1103/physrevlett.121.222001
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发表时间：
2018-08
影响因子：
8.6
通讯作者：
R. Aaij;C. Abellán Beteta;B. Adeva;M. Adinolfi;C. Aidala;Z. Ajaltouni;S. Akar;P. Albicocco;
中科院分区：
文献类型：
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作者：
R. Aaij;C. Abellán Beteta;B. Adeva;M. Adinolfi;C. Aidala;Z. Ajaltouni;S. Akar;P. Albicocco;
用LHCb实验测量了能量为6.5TeV的质子与静止氦原子核碰撞时的瞬时反质子产生截面。靶是通过在LHCb相互作用点向LHC束线中注入氦气体来提供的。所报道的结果涵盖了12至110GeV/c之间的反质子动量，首次直接测定了p-He碰撞中的反质子产生截面，并影响了对空间实验反质子宇宙射线最近结果的解释。
The cross section for prompt antiproton production in collisions of protons with an energy of 6.5 TeV incident on helium nuclei at rest is measured with the LHCb experiment from a data set corresponding to an integrated luminosity of 0.5 nb^{-1}. The target is provided by injecting helium gas into the LHC beam line at the LHCb interaction point. The reported results, covering antiproton momenta between 12 and 110 GeV/c, represent the first direct determination of the antiproton production cross section in p-He collisions, and impact the interpretation of recent results on antiproton cosmic rays from space-borne experiments.