Astroparticle physics

Infused Antarctic ice could boost neutrino detection

Infused Antarctic ice could boost neutrino detection The sensitivity of the IceCube Neutrino Observatory at the South Pole could be boosted by adding optical materials to the icy boreholes that contain its detectors – according to physicists in the US. Encompassing 1 km3 of ice, IceCube comprises 86 cables, each up to 2.5 km long, suspended inside vertical boreholes in the ice. Attached ...

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Cosmic-ray detector heads to the International Space Station

Cosmic-ray detector heads to the International Space Station The Cosmic Ray Energetics And Mass for the International Space Station launches from NASA’s Kennedy Space Center in Florida (Courtesy: NASA TV) NASA has launched a space-based probe that will study the origins of highly energetic particles, known as cosmic rays. Sent into space by a Space X rocket yesterday, the Cosmic Ray Energetics ...

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Ultra high energy cosmic rays have extra galactic origins

Ultra high energy cosmic rays have extra galactic origins Proof that ultra-high-energy cosmic rays come from outside the Milky Way has been published by astrophysicists working on the Pierre Auger Observatory in Argentina. Their measurement has a statistical significance of 5.2σ and appears to settle a decades-old debate about the origins of cosmic rays with energies greater than about 1 EeV (1018 eV). Cosmic ...

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Muons reveal hidden void in Egyptian pyramid

Muons reveal hidden void in Egyptian pyramid Muons reveal hidden void in Egyptian pyramid A large void hidden deep within Khufu’s Pyramid at Giza in Egypt has been discovered by a team of physicists. The first-ever image of the mysterious structure was taken using muons that shower down on Earth after being created when cosmic rays collide with the atmosphere. ...

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Superfluid helium could reveal lightweight WIMPs

Superfluid helium could reveal lightweight WIMPs Superfluid helium could reveal lightweight WIMPs A new detector sensitive to low-mass dark matter particles too light for current experiments to see has been proposed by physicists in the US. Built around a bath of superfluid helium-4, the device would use field ionization to spot single helium ions ejected from the superfluid’s surface by ...

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Hope fades for axion-like dark matter

Hope fades for axion-like dark matter Hope fades for axion-like dark matter Results from an experiment designed to test the limits of charge–parity (CP) symmetry have been used to restrict the possible mass range of a candidate dark-matter particle. Writing in Physical Review X, researchers with the international Neutron Electric Dipole Moment (nEDM) collaboration report that the absence of oscillations in the electric ...

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Looking at the sky from under water

Looking at the sky from under water Building an experiment at the bottom of the sea to detect neutrinos from outer space might seem an odd thing to do, but researchers have been perfecting the unusual pairing for half a century. Antoine Kouchner and Véronique Van Elewyck explain why and how researchers are using the ocean as a giant neutrino detector In the depths of ...

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IceCube tests Standard Model with neutrinos from below

IceCube tests Standard Model with neutrinos from below An investigation of Earth-traveling neutrinos identified by the IceCube Neutrino Observatory at the South Post has decided the collaboration cross-area for record-high neutrino energies. The deliberate esteem is 1.3 times that anticipated by the Standard Model, yet known wellsprings of mistake in the examination make the outcome steady with hypothesis. Since neutrinos collaborate with ...

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European astroparticle physicists release 10-year vision

European astroparticle physicists release 10-year vision A substantial investment is needed to build the next generation of astroparticle physics research infrastructures according to a roadmap published by the Astroparticle Physics European Consortium (APPEC). The document – a vision for European astroparticle physics for the next decade – makes 21 recommendations covering research as well as organisational and societal issues such ...

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