Exciting antiprotons

MIKE CHARLTON

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Exciting antiprotons

机译：令人兴奋的反质子

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In a 1991 News & Views article1 on the ingenious means by which positrons, the antiparticle counterpart of electrons, were used in materials science, John Maddox, the then editor of Nature, asked: "Can any anti-particle make a probe?" What prompted the question was the discovery2 that a few per cent of the antiprotons injected and stopped in liquid helium were trapped in long-lived (metastable) states, with lifetimes of several microseconds. Twenty years down the line, Maddox s poser can be answered with an unequivocal 'yes'. The three-body atomic system that is formed when an antiproton replaces one of the electrons in a helium atom has proved a superb probe for fundamental physics. In the latest advance, Hori and co-workers3 (page 484) describe a trick that has enabled transitions between selected energy levels of the antiprotonic helium to be measured with unprecedented precision. The bottom line is that these measurements, when combined with theory4, have allowed, among other things, a more accurate value of the antiproton-to-electron mass ratio to be determined in order to compare it with the proton equivalent.

机译：在1991年《新闻与观点》（News＆Views）的一篇文章1中，有关材料科学中正电子（电子的反粒子对等物）的巧妙运用，当时的《自然》杂志的编辑约翰·麦道克斯（John Maddox）问道：“任何反粒子都能探测吗？”引发问题的是发现2，注入并停止在液氦中的反质子中有百分之几被捕获为长寿命（可转移）状态，寿命为几微秒。二十年来，Maddox的装腔作势者可以用明确的“是”回答。当反质子取代氦原子中的一个电子时，形成的三体原子系统已被证明是基础物理学的绝妙探针。在最新进展中，Hori及其同事3（第484页）描述了一种技巧，该技巧使反质子氦的选定能级之间的跃迁能够以前所未有的精度进行测量。底线是，这些测量值与理论4结合使用时，除其他外，可以确定更准确的反质子与电子质量比值，以便将其与质子当量进行比较。

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来源
《Nature》 |2011年第7357期|p.459-460|共2页
作者
MIKE CHARLTON;
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作者单位

Department of Physics, College of Science, Swansea University, Swansea SA2 8PP, UK;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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1. Prescriptions on antiproton cross section data for precise theoretical antiproton flux predictions [J] . Fiorenza Donato, Michael Korsmeier, Mattia Di Mauro Physical Review D . 2017,第1a4CD期

机译：关于精确理论反罗素助焊剂预测的反罗朗横截面数据的处方
2. Prescriptions on antiproton cross section data for precise theoretical antiproton flux predictions [J] . Fiorenza Donato, Michael Korsmeier, Mattia Di Mauro Physical review, D . 2017,第4aPta1期

机译：关于精确理论反罗素助焊剂预测的反罗朗横截面数据的处方
3. Measurement of antiproton production in p-He collisions at LHCb to constrain the secondary cosmic antiproton flux [J] . G.Graziani Astronomische Nachrichten: A Journal on all Fields of Astronomy . 2017,第9a10期

机译：测量LHCB在LHCB碰撞中的反罗吨产量，以约束辅助宇宙抗腐核通量
4. Proton-proton, antiproton-antiproton and proton-antiproton correlations [C] . Sebastian Siejka (for the STAR collaboration) Conference on photonics applications in astronomy, communications, industry, and high-energy physics experiments . 2017

机译：质子-质子，反质子-反质子和质子-反质子的相关性
5. A measurement of R = sigma x B meson (proton antiproton going to W boson going to charged electron neutrino)/sigma x B meson (proton antiproton going to Z boson going to positron electron) using the CDF detector in proton antiproton collisions at 1800 GeV. [D] . Wahl, John Edward. 1999

机译：使用CDF检测器在1800 GeV的质子反质子碰撞中使用R = sigma x B介子（质子反质子到达W玻色子去带电电子中微子）/ sigma x B介子（质子反质子到达Z玻色子去正电子）。。
6. Antiproton induced DNA damage: proton like in flight carbon-ion like near rest [O] . J. N. Kavanagh, F. J. Currell, D. J. Timson, -1

机译：反质子诱导的DNA损伤：质子像飞行中的质子碳离子像附近的静止物
7. Measurements of the Decays $B^0 o \bar{D}^0\proton\antiproton$, $B^0 o \bar{D}^{*0}\proton\antiproton$, $B^0 o D^{-}\proton\antiproton\pi^+$, and $B^0 o D^{*-}\proton\antiproton\pi^+$ [O] . The BABAR Collaboration, Aubert, B. 2006

机译：测量衰变$ B ^ 0 \到\ bar {D} ^ 0 \ proton \ antiproton $，$ B ^ 0 \ to \ bar {D} ^ {* 0} \ proton \ antiproton $，$ B ^ 0 \ to D ^ { - } \ proton \ antiproton \ pi ^ + $，和$ B ^ 0 \到D ^ {* - } \ proton \ antiproton \ pi ^ + $

Exciting antiprotons

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