First results from a Search for New Physics in Electronic Recoils from XENONnT
XENONnT, the latest detector of the XENON Dark Matter program, shows an unprecedentedly low background which facilitates searches for new, very rare phenomena with high sensitivity. First results clarify an exciting excess observed in the predecessor XENON1T and set strong limits on new physics scenarios.
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Members of the LZ team in the LZ water tank after the outer detector installation. (Credit: Matthew Kapust/Sanford Underground Research Facility)
Berkeley Lab Researchers Record Successful Startup of LUX-ZEPLIN Dark Matter Detector at Sanford Underground Research Facility
Deep below the Black Hills of South Dakota in the Sanford Underground Research Facility (SURF), an innovative and uniquely sensitive dark matter detector—the LUX-ZEPLIN (LZ) experiment, led by Lawrence Berkeley National Lab (Berkeley Lab)— has passed a check-out phase of startup operations and delivered first results.
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The new pentaquark, illustrated here as a pair of standard hadrons loosely bound in a molecule-like structure, is made up of a charm quark and a charm antiquark and an up, a down and a strange quark / Le nouveau pentaquark, une paire de hadrons classiques faiblement liés dans une structure comparable à celle d'une molécule, est composé d'un quark c et d'un antiquark c, et d'un quark u, d'un quark d et d'un quark s (Image: CERN)
LHCb discovers three new exotic particles
The international LHCb collaboration at the Large Hadron Collider (LHC) has observed three never-before-seen particles: a new kind of “pentaquark” and the first- ever pair of “tetraquarks”, which includes a new type of tetraquark. The findings, presented today at a CERN seminar, add three new exotic members to the growing list of new hadrons found at the LHC. They will help physicists better understand how quarks bind together into these composite particles.
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3D cut of the LHC dipole (Image: CERN)
LHC Run 3: physics at record energy starts tomorrow
A new period of data taking begins on Tuesday, 5 July for the experiments at the world’s most powerful particle accelerator, the Large Hadron Collider (LHC), after more than three years of upgrade and maintenance work. Beams have already been circulating in CERN’s accelerator complex since April, with the LHC machine and its injectors being recommissioned to operate with new higher-intensity beams and increased energy.
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The Higgs boson, ten years after its discovery
The landmark discovery of the Higgs boson at the Large Hadron Collider exactly ten years ago, and the progress made since then to determine its properties, have allowed physicists to make tremendous steps forward in our understanding of the universe.
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From top to bottom, pictures of the ATLAS and CMS detectors (Image: CERN)
ATLAS and CMS release results of most comprehensive studies yet of Higgs boson’s properties
The collaborations have used the largest samples of proton–proton collision data recorded so far by the experiments to study the unique particle in unprecedented detail
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Oak Ridge National Laboratory’s Leah Broussard shows a neutron-absorbing "wall" that stops all neutrons but in theory would allow hypothetical mirror neutrons to pass through. Credit: Genevieve Martin/ORNL, U.S. Dept. of Energy
Physicists confront the neutron lifetime puzzle
To solve a long-standing puzzle about how long a neutron can “live” outside an atomic nucleus, physicists entertained a wild but testable theory positing the existence of a right-handed version of our left-handed universe. They designed a mind-bending experiment at the Department of Energy’s Oak Ridge National Laboratory to try to detect a particle that has been speculated but not spotted.
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Winners of the CERN Beamline for Schools 2022 (top to bottom): the Club de Física Enrico Fermi team (Vigo, Spain / Image: Club de Física Enrico Fermi); the STA students from the Elsewedy Technical Academy (Cairo, Egypt / Image: Elsewedy Technical Academy); and the Supercooling team from the École du Sacré-Coeur (Reims, France / Image: École du Sacré-Coeur).
Three teams of high-school students from Egypt, France and Spain win the CERN Beamline for Schools competition
Three teams of high-school students from the Elsewedy Technical Academy (STA) (Cairo, Egypt), the École du Sacré-Coeur (Reims, France) and the Club de Física Enrico Fermi (Vigo, Spain) have won the 2022 edition of the Beamline for Schools competition
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Join the 10th anniversary celebration of the discovery of the Higgs boson
The Interactions Collaboration and the worldwide particle physics community are launching Higgs10.org to celebrate this historic milestone from now to 4 July 2022 - with events, stories, and a reprise of the popular Quantum Diaries blog, culminating in an online anniversary celebration on the day of the discovery.
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Scientists used the STAR detector at the Relativistic Heavy Ion Collider (RHIC), shown here, to track how certain jets of particles lose energy in the quark-gluon plasma (QGP) created when the nuclei of gold atoms collide in the center of the detector.
Study Reveals How Some High-Energy Particle 'Jets' Lose Energy
Scientists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) have revealed how certain particle-jets lose energy as they traverse the unique form of nuclear matter created in these collisions. The results, published in Physical Review C, should help them learn about key “transport properties” of this hot particle soup, known as a quark-gluon plasma (QGP).
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Click here to view the CERN symposium livestream on 4 July!