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王贻芳再谈大型对撞机:让中国成世界第一的政治决定

2016-10-22 10:49:15   

绝大多数专家首先肯定了推广、研究基础物理的意义,也肯定了粒子物理对于人类认识世界的意义,但就大型对撞机项目落户中国却持有不同的看法,反对者对于大型对撞机项目的质疑点可以归结为以下四个方面。

1.科学目标不明确

“首先你需要拿出令人信服的科学根据,而不是打赌式的计划,因为谁也不能保证能够发现新粒子”。中科院院士李雷(化名)表示,LHC已经在此基础上做了很多年的实验,也取得了一定的成就,但却止步在一定的阶段。

正如今年八月在美国芝加哥举行的国际高能物理大会指出,大型强子对撞机LHC今年积累了25000TB的数据,然而却并没有发现任何新粒子证据,帮助产出大量论文的750GeV新粒子也正式宣告不存在,目标中的暗物质(LUX和PandaX)、磁单极子(MoEDAL)和惰性中微子(冰立方)也全部沦陷。一些年轻的物理学家们也开始质疑和反思,是否用于对撞机建造、研究的经费应该用在其它领域?

“那么在此基础上另起炉灶,用并无革命性技术、仅加大能级的装置的目的何在?能否找到新粒子还是一个未知数,在目标不确定的情况下投入巨大的财力物力,价值何在?大型科学装置本身就要对国家负责,关乎科研诚信的问题,有疑问的科学行为是否值得政府花费极大代价,答案本身就是否定的。”李雷院士表示。

2.关键技术不在手

在并没有革命性技术出现的背景下,许多科学家也在质疑中国大型对撞机项目是在用蛮力,且很多技术细节还需要依靠西方的支持。

这点不仅在国内受到诟病,西方也有人专门为此撰文。8月25日,《自然》杂志以“Who will build the next LHC?”为题,介绍了目前世界上主要的大型对撞机计划,包括正在运行的LHC以及日本计划建造的ILC(Japan-hosted International Linear Collider,大型直线对撞机)、CPEC、SPPC和升级版的LHC。文中显示,在2030年左右,规划中的升级版LHC和SPPC将会“撞车”,二者将会相互“影响”。

李雷院士也提到,他在与相关领域的技术人员探讨时获悉,很多关键技术仍掌握在西方手中,单靠中国现有的技术手段,很多技术细节无法完成,“在很多关键技术需要西方来完成的情况下,即便发现了新粒子,主要的贡献究竟是归功于出资占比大的中国还是掌握技术的西方,这本身也是个争议性的问题”。

3.重蹈SSC的覆辙

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