Tag

Lhc

All articles tagged with #lhc

science5 days ago•5 min saved

LHC study uncovers bowling-pin shaped neon-20 nuclei

Physicists at the LHC compared collisions of light nuclei (oxygen-16 and neon-20) to probe atomic-nucleus shapes. They found evidence that neon-20 has a bowling-pin-like deformation, which subtly alters the flow of particles emitted in collisions (elliptic and triangular flow), supporting the idea that nuclear geometry affects collision outcomes. Some quantitative mismatches with models remain, but the results demonstrate that collider experiments can reveal nucleus shapes; the findings are published in Physical Review Letters.

via ScienceAlert|

#elliptic-flow #lhc #neon-20

science24 days ago•4 min saved

LHC Finds Quark-Gluon Plasma Clues in Light-Ion Collisions

Four major LHC experiments (ALICE, ATLAS, CMS, LHCb) report signs that oxygen–oxygen and neon–neon collisions produce quark-gluon plasma, the primordial matter from the early Universe. Evidence includes parton energy loss, suppression of energetic particles, upsilon-meson suppression, and anisotropic flow, suggesting QGP can form in lighter ions and challenging previous assumptions. Ongoing studies with the HL-LHC aim to study this state in greater detail.

via SciTechDaily|

#lhc #light-ion-collisions #particle-physics

science26 days ago•6 min saved

LHC Could Detect Macroscopic Dark Matter Without New Hardware

Physicists propose that macroscopic dark matter objects called axion quark nuggets (AQNs) could generate tiny acoustic shocks near the LHC that disturb dust in the beam screens, triggering the unidentified falling objects (UFOs) seen in the accelerator. They advocate reanalyzing past UFO events and using existing beam-loss monitors to search for a distinctive pattern—three or more correlated events within 2 seconds along the 27-km tunnel—that would indicate an AQN passage. If confirmed, the LHC could serve as a dark-matter detector without hardware changes, with the work slated for Physical Review D.

via ScienceAlert|

#aqns #axion-quark-nuggets #beam-loss-monitors

science1 month ago•104 min saved

LHC unmasks primordial diffusion wake in quark-gluon plasma, hinting at the early universe

After more than two decades of searching, scientists at the Large Hadron Collider observed a diffusion wake in the hot quark-gluon plasma created by lead–lead collisions, matching long-predicted behavior and enabling a more precise study of this primordial state. By analyzing back-to-back dijet events, researchers isolated the wake signals—most pronounced in central collisions—and reported the finding in Physical Review Letters, marking a major step toward understanding the properties of the quark-gluon plasma and the conditions of the early universe just after the Big Bang.

via Space|

#diffusion-wake #early-universe #lead-lead-collisions

science1 month ago•45 min saved

HiLumi Era Begins: LHC Upgrades Set Stage for Tenfold Leap in Physics

After 18 years of discoveries, CERN’s Large Hadron Collider enters Long Shutdown 3 to be upgraded into the High-Luminosity LHC (HiLumi LHC). The upgrade will boost luminosity by about ten times, enabling more detailed data on the Higgs boson and other subatomic phenomena. The renovation includes major overhauls to magnets and infrastructure, with a gradual restart beginning in 2028 and full operation by 2030, marking a new era in particle physics research.

via Yahoo|

#cern #higgs-boson #hilumi-lhc

science4 months ago•5 min saved

LHC Clues Hint at Physics Beyond the Standard Model

New LHCb results on rare B-meson decays, corroborated by CMS data, show tensions with Standard Model predictions in electroweak penguin processes, hinting at heavy new particles such as leptoquarks. While not definitive, the anomalies are growing and future LHC upgrades and larger datasets may confirm a need for new physics beyond the Standard Model.

via The Debrief|

#b-meson #lhc #new-physics

science4 months ago•12 min saved

LHCb hints at physics beyond the Standard Model in rare B meson decays

New results from CERN’s LHCb show a rare electroweak penguin decay of B mesons that disagrees with Standard Model predictions at about four standard deviations, hinting at possible new physics. The finding is supported by earlier CMS results and comes from analyzing roughly 650 billion B decays (2011–2018). Although intriguing, it does not reach the five-sigma discovery threshold; further data and upgrades planned for the 2030s could confirm whether this points to new particles or remains a heavy overlap within the current theory.

via The Conversation|

#b-mesons #lhc #lhcb

science4 months ago•159 min saved

CMS measures W boson mass with record precision at 13 TeV

CMS analyzed over 100 million W→μν decays from 2016 pp collisions at 13 TeV to extract mW using a highly granular, in-situ template fit of the muon pT, eta and charge distributions, aided by state-of-the-art NNLO+N3LL theory and data-driven PDFs; the result mW = 80,360.2 ± 9.9 MeV agrees with the Standard Model and helps address the prior CDF tension, with an additional W+ vs W− mass difference measurement of 57.0 ± 30.3 MeV. The analysis validates via Z-boson mass checks and a W-like mZ cross-check, and features robust muon momentum scale and hadronic recoil calibrations.

via Nature|

#cms-experiment #electroweak-precision #lhc

science5 months ago•2 min saved

LHCb Discovers Xi-cc-plus, a New Two-Charm Baryon

Scientists at CERN's LHCb have identified a new baryon, Xi-cc-plus, composed of two charm quarks and one down quark. Weighing about four times the mass of a proton, it offers a testbed for quantum chromodynamics and the strong force; discovered after 2023 detector upgrades, it is only the second observed baryon with two heavy quarks and has a lifetime up to six times shorter than a similar earlier baryon.

via Futurism|

#baryons #cern #lhc

science5 months ago•3 min saved

CERN uncovers Xi-cc-plus, a heavy new cousin of the proton after decades-long hunt

British researchers at CERN report the discovery of Xi-cc-plus, a proton-like particle four times heavier than a regular proton, found in data from the upgraded LHCb detector after a 20-year search, promising new insights into the strong force that binds atomic nuclei.

via New York Post|

#cern #lhc #particle-physics

science6 months ago•18 min saved

Fleeting alchemy: lead briefly becomes gold in the LHC

At the LHC's ALICE experiment, ultraperipheral lead-208 collisions produce gold-205 briefly via photon exchange, with a cross section near 6.8 barns and a lifetime of about 1e-23 seconds. This clean, photon-driven process lets physicists probe nuclear structure and QED at high energy and informs future collider design.

via Earth.com|

#alice #gold #high-energy-physics

science6 months ago•5 min saved

LHC Finds Quark-Gluon Plasma Flows Like a Liquid in Early-Universe Conditions

Physicists at the Large Hadron Collider recreated brief, Big-Bang–like conditions by colliding heavy nuclei, forming a droplet of quark-gluon plasma that behaves more like a liquid than a gas. By tagging quarks with Z bosons, researchers observed a tiny wake and a sub-percent dip in particle production, indicating energy transfer to the plasma and opening new avenues to study the primordial state of matter, as reported in Physics Letters B.

via The Daily Galaxy|

#early-universe #heavy-ion-collisions #lhc

science6 months ago•48 min saved

LHC reveals primordial quark-gluon soup behaved like a liquid

Using the Large Hadron Collider, researchers recreated quark‑gluon plasma and observed that the ultra‑hot primordial soup behaved as a nearly perfect liquid, producing wakes as fast‑moving quarks traversed it. By tagging events with a Z‑boson to isolate single-quark wakes, they found fluid‑like ripples that match hybrid model predictions, offering new insight into the universe’s first microseconds and the properties of the quark‑gluon plasma (Physics Letters B).

via Space|

#gluons #lhc #primordial-soup

science7 months ago•16 min saved

Particle Physics at a Crossroads: Hard Questions, New Paths

More than a decade after the Higgs discovery, particle physics has yet to find new physics beyond the Standard Model, prompting a crisis about the field’s direction. Proposals for big next-gen machines (the Future Circular Collider, muon colliders) and smaller-scale tests (axions, hidden valleys) mingle with advances in AI-assisted data analysis, but there’s no discovery guarantee and talent is drifting toward other fields. In short, particle physics isn’t dead, but it’s hard—and the path forward remains uncertain.

via Quanta Magazine|

#artificial-intelligence #future-collider #lhc

science7 months ago•10 min saved

Private donors back CERN's multi-decade Future Circular Collider plan

CERN has secured $1 billion in private donations from the Breakthrough Prize Foundation, the Eric and Wendy Schmidt Fund, John Elkann, and Xavier Niel to kick off the Future Circular Collider (FCC), a 90.7-km tunnel intended as the Large Hadron Collider’s successor. The plan features a two-phase roadmap: FCC-ee as a Higgs factory starting around 2030 with operations by 2047, followed by FCC-hh protons at 85 TeV in the 2070s to probe new physics. A CERN Council decision is expected in 2028, with construction potentially starting in 2030. China’s CEPC stall may open collaboration opportunities modeled after ITER, while the HL-LHC upgrade remains a priority in the near term.

via Interesting Engineering|

#cern #future-circular-collider #higgs-factory