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Particle physics: Will muons lead us towards a new physics?


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Muons, particles akin to electrons, have kepts physicists heads spinning for more than a decade, because an experimental measurement of their magnetic properties (1) disagrees with theory. Could this be caused by unknown particles or forces?
A new theoretical calculation of this parameter, involving CNRS physicists and published in the journal Nature, has reduced the discrepancy with the experimental measurement. The debate nevertheless continues.

For over 10 years, measurement of the magnetic properties of the muon (an ephemeral cousin of the electron) has exhibited disagreement with theoretical predictions. This suggests a possible gap in the standard model of particle physics (2), possibly providing a glimpse of a more exotic physics. The first results of Fermilab s Muon g-2 experiment, which measures one of these properties known as the muon magnetic moment, will be revealed on 7 April 2021. ....

France General , Nordrhein Westfalen , Jean Zay , Zhiqing Zhang Ijclab , Marseille Universit , Bogdan Malaescu , Laurent Lellouch , Michel Davier Ijclab , Brookhaven National Laboratory United States , Pennsylvania State University United States , Leibniz Supercomputing Centre Munich , Centre For Theoretical Physics , High Performance Computing Center Stuttgart , Institute For Development , University Hungary , University Of Wuppertal , Large Computing Centre , Brookhaven National Laboratory , United States , Michel Davier , Andreas Hoecker , Sorbonne Universit , Zhiqing Zhang , Physics Reports , Theoretical Physics , Aix Marseille Universit ,

Adger, Burton and O'Brien win the BBVA Frontiers of Knowledge Award in Climate Change


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IMAGE: Neil Adger, winner of the BBVA Foundation Frontiers of Knowledge Award in Climate Change.
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Credit: BBVA FOUNDATION
The BBVA Foundation Frontiers of Knowledge Award in Climate Change has gone in this thirteenth edition to Neil Adger, Ian Burton and Karen O Brien for changing the paradigm of climate change action, previously confined to mitigation of greenhouse gas emissions, by folding in the concept of adaptation to unavoidable impacts.
While earlier editions of the Frontiers of Knowledge Awards have distinguished contributions to climate change science from the realms of modelling, physics or economics, this year s prize recognizes the contribution of the social sciences. Specifically, the committee has selected three researchers who have pioneered the study of how social conditions and culture shape our vulnerability to climate change and our ability to adapt, in the words of the award citation. ....

United States , France General , United Kingdom , Republic Of , Northern Ireland , Saudi Arabia , Selva Lacandona , City Of , Neil Adger , Josep Mar , Karen Obrien , Carlosm Duarte , Carlos Duarte , Martin Heimann , Blas Valero Garc , Sian Burton , Edward Rubin , Julie Winkler , Neil Adger Ballymena , Francisca Mart , Bjorn Stevens , Ian Burton Derby , Andalusian Earth Sciences Institute , Foundation Frontiers Of Knowledge , University Of Edinburgh , Department Of Geography ,

New Study Helps Pinpoint When Earth's Plate Subduction Began


New Study Helps Pinpoint When Earth’s Plate Subduction Began
A new study from scientists at Scripps Institution of Oceanography at UC San Diego and the University of Chicago sheds light on a hotly contested debate in Earth sciences: when did plate subduction begin?
According to findings published Dec. 9 in the journal Science Advances, this process could have started 3.75 billion years ago, reshaping Earth’s surface and setting the stage for a planet hospitable to life.
For geochemists like Scripps assistant professor and study lead author Sarah Aarons, the clues to Earth’s earliest habitability lie in the elements that ancient rocks are composed of – specifically titanium. Aarons analyzed samples of Earth’s oldest-known rocks from the Acasta Gneiss Complex in the Canadian tundra – an outcrop of gneisses 4.02 billion years old. These rocks are dated from the Hadean eon, which started at the beginning of Earth’s formation and was defined by hellish conditi ....

United States , Sarah Aarons , Nicolas Dauphas , Jesse Reimink , University Of Bern Switzerland , Pennsylvania State University United States , National Science Foundation , Ford Foundation Postdoctoral Fellowship , University Of Chicago , Swiss National Science Foundation , Scripps Institution Of Oceanography , Penn State University , Scripps Institution , Science Advances , Acasta Gneiss Complex , Acasta Gneiss , Pennsylvania State University , Swiss National Science , ஒன்றுபட்டது மாநிலங்களில் , சாரா ஆரொன்ஸ் , பல்கலைக்கழகம் ஆஃப் பெர்ன் சுவிட்சர்லாந்து , பென்சில்வேனியா நிலை பல்கலைக்கழகம் ஒன்றுபட்டது மாநிலங்களில் , தேசிய அறிவியல் அடித்தளம் , ஃபோர்ட் அடித்தளம் போஸ்ட்‌டாக்டொரல் கூட்டுறவு , பல்கலைக்கழகம் ஆஃப் சிகாகோ , சுவிஸ் தேசிய அறிவியல் அடித்தளம் ,