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25 ans, une bascule : quand le Soleil semblait peut-Γͺtre Γ©teint… et rΓ©vΓ©lait une nouvelle physique

La fin du XXe siècle a montré une connexion de plus en plus profonde entre la physique de l'infiniment petit et celle de l'infiniment grand. Cette connexion s'est poursuivie au cours du XXIe siècle, notamment en ce qui concerne les neutrinos, ces particules souvent fantomatiques. Au cours de ses...

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Neutrino Laser is Physically and Fundamentally Impossible, Physicists Say

B.J.P. Jones & J.A. Formaggio devise an idea for a laser that shoots a beam of neutrinos. Image credit: Gemini AI.

In a pair of papers published in the journal Physical Review Letters, a team of MIT physicists has shown that the neutrino laser -- a concept proposed just a year ago -- cannot actually be built, no matter how advanced the technology becomes.

The post Neutrino Laser is Physically and Fundamentally Impossible, Physicists Say appeared first on Sci.News: Breaking Science News.

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Astronomers Trace Elusive High-Energy Neutrino to Star-Forming Galaxy in Early Universe

The origin of high-energy astrophysical neutrinos remains unresolved, and secure electromagnetic counterparts to individual events are rare despite rapid follow-up. Dusty star-forming galaxies at cosmic noon (redshift of z β‰ˆ 1-4) are natural cosmic-ray calorimeters, yet observational links between these galaxies and neutrinos have remained unknown. Urata et al. report a compact-core, dusty star-forming galaxy within an IceCube localization, JCMT0402-0424, a quadruply lensed galaxy at z = 2.988 located inside the 90% containment region of the IceCube event IC 210922A. Image credit: International Gemini Observatory / NOIRLab / NSF / AURA / ALMA / ESO / NAOJ / NRAO / T.A. Rector, University of Alaska Anchorage & NSF’s NOIRLab / D. de Martin & M. Zamani, NSF’s NOIRLab / Yuji Urata. MITOS Science Co., LTD.

JCMT0402-0424, a dusty starburst galaxy around 11 billion light-years away, is the strongest candidate yet for the source of the high-energy neutrino event IC 210922A, according to a team of astronomer led by Yuji Urata of MITOS Science Co.

The post Astronomers Trace Elusive High-Energy Neutrino to Star-Forming Galaxy in Early Universe appeared first on Sci.News: Breaking Science News.

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