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On the website of Nature an article was published on 25 May which says that an amazing thing has been discovered in Debrecen: the fifth force of nature. The experimental results of the Institute for Nuclear Research, Hungarian Academy of Sciences are going to be repeated worldwide.
The experiment carried out by Attila Krasznahorkay and his colleagues woke up the interest of theoreticians and experimental physicists as well. However, it is assumed that the found new thing is not a dark photon but a new, fifth force of nature (beyond the gravitation, electromagnetic, strong and weak force).
More information (in Hungarian): MTA hírei
Video (in Hungarian): hirado.hu
Other articles (in Hungarian): Innotéka
Contact: Krasznahorkay Attila scientific advisor (krasznahorkay.attila@atomki.mta.hu)
Nature News, 25 May 2016
Has a Hungarian physics lab found a fifth force of nature?
Radioactive decay anomaly could imply a new fundamental force, theorists say.
Krasznahorkay says his group was searching for evidence of just such a dark photon – but Feng’s team think they found something different. The Hungarian team fired protons at thin targets of lithium-7, which created unstable beryllium-8 nuclei that then decayed and spat out pairs of electrons and positrons. According to the standard model, physicists should see that the number of observed pairs drops as the angle separating the trajectory of the electron and positron increases. But the team reported that at about 140º, the number of such emissions jumps — creating a ‘bump’ when the number of pairs are plotted against the angle — before dropping off again at higher angles.
Physical Review Letters 116, 042501 – Published 26 January 2016