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This revolution has been a long time in the making. Behind it are metrologists working in their scientific laboratories, and scientific managers in their decision-making committees. Now the moment is approaching when many of the old quantities (specifically, the definitions behind them) will have to step down to make way for their successors, who are waiting in the wings. The quantities concerned are the kilogram, the mole, the ampere and the kelvin. The foremost expert committee in the world of metrology, the International Committee for Weights and Measures (Comité international des poids et mesures, CIPM), issued its unequivocal recommendation for this development at its recently concluded annual assembly. It is hoped that, at their general conference next year, the international community of signatories to the Metre Convention will heed the experts’ advice and provide the physical units with an especially firm foundation – one that...

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The search goes on. No difference in protons and antiprotons have yet been found which would help to potentially explain the existence of matter in our universe. However, physicists in the BASE collaboration at the CERN research center have been able to measure the magnetic force of antiprotons with almost unbelievable precision. Nevertheless, the data do not provide any information about how matter formed in the early universe as particles and antiparticles would have had to completely destroy one another. The most recent BASE measurements revealed instead a large overlap between protons and antiprotons, thus confirming the Standard Model of particle physics. Around the world, scientists are using a variety of methods to find some difference, regardless of how small. The matter-antimatter imbalance in the universe is one of the hot topics of modern physics.

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Are you searching for a specific topic? Have you looked at our Opens internal link in current windowHomepage yet? There you will find the latest press releases and research news from PTB's specialist divisions. Maybe you'll find the subject you're looking for there. Perhaps looking at the Opens internal link in current windowPresseresonanz der PTB oder unsere Opens internal link in current windowZeitschriften und Opens internal link in current windowBroschüren interessant. Sie können sich aber natürlich auch direkt an uns wenden. Pressesprecher Jens Simon (0531-592-3005,Opens window for sending email jens.simon(at)ptb.de) oder die Nachrichtenredakteurinnen Erika Schow (0531-592-9314, Opens window for sending emailerika.schow(at)ptb.de) und Imke Frischmuth (0531-592-9323, Opens window for sending emailimke.frischmuth(at)ptb.de) weisen Ihnen gerne einen individuellen Weg durch den „Themen-Dschungel“ PTB. 

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Do you need a good photo for your article? Under Press photos you can find images of important PTB topics which you can download free of charge. Can't see the right photo? Then please contact Erika Schow (+49(0)531 592-9314, erika.schow(at)ptb.de)