科学家测量出中微子至今最精确质量上限 0.45 eV
KATRIN实验团队通过分析氚的β衰变，测量了约3600万个电子的能量，确定了电子中微子有效质量的最严格实验室上限为<0.45 eV（90%置信水平）。这一结果表明中微子的质量不到电子的百万分之一，为超越标准模型的物理学提供了重要线索。
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科学家测量出中微子至今最精确质量上限 0.45 eV Solidot
科学家测定最精确中微子质量上限 中国科技网/科学网
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elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.
Start with a fresh view of investing strategy. The combination of risks and fads this quarter looks to be topping. That means the future is ready to move in.Likely, there will not be a wholesale shift. Company actions will aim to benefit from economic growth, inflationary pressures and a return of market-determined interest rates. In turn, all of that should drive the stock market and investment returns higher.
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