Fundamental Particles

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Particles Found to Travel Faster than Speed of Light An Italian experiment has unveiled evidence that fundamental particles known as neutrinos can travel faster than light. Other researchers are cautious about the result, but if it stands further scrutiny, the finding would overturn the most fundamental rule of modern physics—that nothing travels faster than 299,792,458 meters per second. The experiment is called OPERA (Oscillation Project with Emulsion-tRacking Apparatus), and lies 1,400 meters underground in the Gran Sasso National Laboratory in Italy. Particles Found to Travel Faster than Speed of Light
Read more: "Neutrinos: Complete guide to the ghostly particle" Representatives from the OPERA collaboration spoke in a seminar at CERN today, supporting their astonishing claim that neutrinos can travel faster than the speed of light. The result is conceptually simple: neutrinos travelling from a particle accelerator at CERN in Switzerland arrived 60 nanoseconds too early at a detector in the Gran Sasso cavern in Italy. And it relies on three conceptually simple measurements, explained Dario Autiero of the Institute of Nuclear Physics in Lyon: the distance between the labs, the time the neutrinos left Switzerland, and the time they arrived in Italy. But actually measuring those times and distances to the accuracy needed to detect differences of billionths of a second (1 nanosecond = 1 billionth of a second) is no easy task. Faster-than-light neutrino claim bolstered - physics-math - 23 September 2011 Faster-than-light neutrino claim bolstered - physics-math - 23 September 2011
Faster-Than-Light Neutrinos? Physics Luminaries Voice Doubts A few dozen nanoseconds, an imperceptibly slim interval in everyday life, can make all the difference in experimental physics. A European physics collaboration made a stunning announcement September 23, after having clocked elementary particles called neutrinos making the underground journey from a lab in Switzerland to one in Italy. The neutrinos made the trip 60 nanoseconds faster than they would have traveling at light speed, the researchers found. Faster, that is, than the rules of physics as we understand them would allow. If confirmed, the results from the OPERA (Oscillation Project with Emulsion-tRacking Apparatus) collaboration would be huge, a once-in-a-lifetime revolution in how we understand the universe. But there are plenty of reasons to believe that Albert Einstein's long-reigning theory of relativity will survive this challenge, as it has withstood so many in the past. Faster-Than-Light Neutrinos? Physics Luminaries Voice Doubts
Leading Light: What Would Faster-Than-Light Neutrinos Mean for Physics? The stunning recent announcement of neutrinos apparently exceeding the speed of light was greeted with startled wonderment followed by widespread disbelief. Although virtually every scientist on record expects this discovery to vanish once more detailed analysis takes place, dozens of researchers are exploring the question whose answer could shake the foundations of physics: What if this anomaly is real? Neutrinos are ghostly particles that only weakly interact with normal matter; trillions of neutrinos stream through our bodies every second. Last month researchers from the European OPERA (Oscillation Project with Emulsion-tRacking Apparatus) collaboration reported clocking pulses of neutrinos moving at speeds that appeared to be a smidgen faster than light-speed. Leading Light: What Would Faster-Than-Light Neutrinos Mean for Physics?
You wait decades for discoveries that could revolutionise physics, then three come along at once "THE universe is not only queerer than we suppose, but queerer than we can suppose," as geneticist J. B. S. Haldane once remarked. In recent decades, physicists have done their best to prove Haldane wrong, by supposing some very queer universes indeed. Neutrinos and multiverses: a new cosmology beckons - opinion - 28 November 2011 Neutrinos and multiverses: a new cosmology beckons - opinion - 28 November 2011
Critics Take Aim At Fast Neutrinos Critics Take Aim At Fast Neutrinos A new study puts the brakes on faster-than-light neutrinos. In September, a group at Italy’s OPERA experiment reportedly clocked neutrinos traveling the 730 kilometers from CERN in Switzerland to Italy’s underground Gran Sasso National Laboratory about 60 nanoseconds faster than light would have covered that distance in a vacuum (SN: 10/22/11, p. 18). But if this were true, most of the neutrinos would have shed energy en route, a new analysis by Boston University physicists suggests. OPERA should have detected this radiation, say the physicists, if its claims are to be believed. It didn’t.
Neutrino Parents Call Into Question Faster-than-light Results
Short Sharp Science: Speedy neutrino result may be due to instrument glitch Short Sharp Science: Speedy neutrino result may be due to instrument glitch Lisa Grossman, reporter Read more: "Neutrinos: Complete guide to the ghostly particle" Maybe it was unbelievable for a reason. The signs that neutrinos may travel faster than light, contradicting the well-tested rules of Einstein's special theory of relativity, look like they may have been due to a bad GPS connection. The speedsters took 2.4 milliseconds to fly from a particle accelerator at CERN near Geneva in Switzerland to an underground detector at Gran Sasso, Italy, a distance of 730 kilometres.
Faster-than-light neutrinos dealt another blow - physics-math - 04 January 2012 Read more: "Neutrinos: Complete guide to the ghostly particle" Faster-than-light neutrinos can't catch a break. If they exist they would not only flout special relativity but also the fundamental tenet that energy is conserved in the universe. This suggests that either the speedy neutrino claim is wrong or that new physics is needed to account for it. In September, physicists with the OPERA experiment in Gran Sasso, Italy, reported that neutrinos had apparently travelled there from CERN near Geneva, Switzerland, faster than light. The claim threatened to blow a hole in modern physics – chiefly Einstein's special theory of relativity, which set the speed of light as the absolute limit for all particles in the universe. Faster-than-light neutrinos dealt another blow - physics-math - 04 January 2012
Want to stay on top of all the space news? Follow @universetoday on Twitter Inside the LHC's underground tunnel. Neutrinos Obey The Speed Limit, After All Neutrinos Obey The Speed Limit, After All
Loose Cable Blamed For Speedy Neutrinos
Astrophile is our weekly column on curious cosmic objects, from the solar system to the far reaches of the multiverse Object type: Exploding starLocation: 160,000 light years from Earth, in the Large Magellanic Cloud "Once in a lifetime" barely begins to describe it – astronomers had literally been waiting centuries for such a spectacle. The supernova that blazed forth on 23 February 1987 was the brightest since the one Johannes Kepler spotted in 1604. The explosion happened just an astronomical stone's throw away, in a satellite galaxy of the Milky Way, which is why it was so bright it could be seen with the naked eye. No supernova so nearby had been seen since the invention of the telescope. Astrophile: The relativity-testing supernova next door - space - 24 February 2012 Astrophile: The relativity-testing supernova next door - space - 24 February 2012
Particles break light-speed limit : Nature News
Neutrinos: Everything you need to know - physics-math - 27 September 2011 Read more: "Neutrinos: Complete guide to the ghostly particle" "…We don't allow faster-than-light neutrinos in here," says the barman. A neutrino walks into a bar…" As reports spread of subatomic particles moving faster than light and potentially travelling through time, such gags were born. But apparently super-hasty motion is not the only strange thing about neutrinos. What exactly are they?
WMAP Big Bang Concepts The Big Bang model of cosmology rests on two key ideas that date back to the early 20th century: General Relativity and the Cosmological Principle. By assuming that the matter in the universe is distributed uniformly on the largest scales, one can use General Relativity to compute the corresponding gravitational effects of that matter. Since gravity is a property of space-time in General Relativity, this is equivalent to computing the dynamics of space-time itself. The story unfolds as follows: Given the assumption that the matter in the universe is homogeneous and isotropic (The Cosmological Principle) it can be shown that the corresponding distortion of space-time (due to the gravitational effects of this matter) can only have one of three forms, as shown schematically in the picture at left.
It is amazing how, no matter what people’s background, the quest to discover the basic laws of nature that underlie the very fabric of the universe has the capacity to engage the imagination. And what could be more abstract and esoteric than the search for the Higgs boson? The boson is a particle predicted by Peter Higgs in 1964 in an attempt to explain the inability of the standard model of particle physics to explain a fundamental concept: mass. Let’s celebrate the search for the ‘God particle’ | David Perks
Hunt for Higgs Particle Enters Endgame By Geoff Brumfiel of Nature magazine Bill Murray is a man with secrets. Along with a handful of other scientists based at CERN, Europe's particle-physics facility near Geneva, Switzerland, Murray is one of the few researchers with access to the latest data on the Higgs boson -- the most sought-after particle in physics. Looking at his laptop, he traces a thin black line that wiggles across a shaded area at the centre of a graph. This is the fruit of his summer's labours.
On December 13, CERN will release the results of a new data analysis in the search for the Higgs boson. at the LHC. As I was reporting my article, which appeared today, on December 7 I spoke on the phone with Joe Lykken, a Fermilab staff theoretical physicist. Lykken is a member of the CMS collaboration, one of the two largest experiments at the LHC (the other one being ATLAS). The following is a lightly edited, partial transcript of that conversation. Do you have high expectations for next week? Where’s My Higgs? LHC Physicist Joe Lykken Speaks | Degrees of Freedom
What Higgs result means for dark matter conspiracy - 21 December 2011
What if there is no Higgs boson? - physics-math - 09 December 2011
Has the Higgs Been Discovered? Physicists Gear Up for Watershed Announcement
LHC sees hint of lightweight Higgs boson - physics-math - 13 December 2011
Hunting the Higgs - David Kaiser - Project Syndicate
Scientists to unveil proof of ‘God particle’ | The Lookout
Higgs-like Particle Discovered at CERN
Higgs Found
Higgs fever: Your guide to the most-wanted particle - physics-math - 02 July 2012
The missing piece
Higgs Boson Might Yield Origins of Universe But Questions Remain
Higgs result means elegant universe is back in vogue - physics-math - 06 January 2012
What the latest LHC revelations say about the Higgs - physics-math - 09 February 2012
Conflicting Higgs results muddy particle hunt - physics-math - 07 March 2012
Higgs hunt enters endgame
Higgs Boson Signal Gains Strength
Higgs boson: Excitement builds over 'glimpses' at LHC
Does the “Goddamn” Higgs Particle Portend the End of Physics? | Cross-Check
LHC boosts energy to snag Higgs – and superpartners - physics-math - 13 February 2012
Short Sharp Science: LHC smashes particle collision record
Have we summoned the mysterious Majorana fermion? - physics-math - 15 March 2012
Long-sought Particles Possibly Glimpsed
Quantum "Graviton" Particles May Resemble Ordinary Particles of Force
What’s In a Femtosecond of Laser Light? A Map of Electron Energy
Supercomputer probes famous but messy particle split - physics-math - 13 April 2012
The Particle Adventure
Happy Birthday, Electron
Higgsteria rising as trouble brews for standard model - physics-math - 19 June 2012
New "Beauty Baryon" Particle Discovered at Large Hadron Collider
LHC gets first glimpse of excited baryon - physics-math - 01 May 2012
Lazy photon among the missing in exotic LHC roll call - physics-math - 31 January 2012
Quest for Quirky Quantum Particles May Have Struck Gold
Peaceable matter-antimatter pairs glimpsed in the lab - physics-math - 29 February 2012
Flavor of the Ray: Neutrino Measurement May Help Solve Mystery of Matter's Domination over Antimatter
Neutrinos could help explain missing antimatter - physics-math - 09 March 2012
Short Sharp Science: First ever measurement on atom of pure antimatter
Antimatter: The Production Problem
Protons On The Move Find Novel Molecular Route
The Vega Science Trust - Richard Feynman - Science Videos
Hunt For Cosmic Ray Source Falls Short
Cosmic Rays: They Aren’t What We Thought They Were
Proposed Type Of Solar Neutrino Spotted
Neutrinos don't outpace light, but they do shape-shift - physics-math - 08 June 2012