Large Hadron Collider nearly ready
- Thread starter auric
- Start date
I can see the insurance claim form is it:
"All my house contents and material possessions are now squeezed into a sub-atomic dot, and thus I have been deprived of thier use. I therefore claim on a full reinstatment basis everything I have. I don't have the receipts, becuase they are also part of the sub-atomic dot"
Would creating a black hole be an "Act of God" though - He must of thought of them in the first place is it?
DS
PigletsDad
My intelligence test came back negative.
I've read a paper with the arguments why - it is pretty convincing.
The basic physics of black holes were worked out by Hawking, and there is an inverse relationship between black hole mass and temperature. Small black holes are hot, and decay rapidly - they radiate energy, which makes them lose mass, which makes them hotter and they soon evaporate away to nothing.
The paper then looks at what happens with black holes of greater mass; there is race between the rate at which new matter can be ingested, and the rate at which mass is lost by radiation. It turns out that the minimum size of black hole that is long lived is surprisingly large, and well outside the energy range of the LHC.
There are some subtleties that I can't get remember in detail to do with charge on the black hole and neutralization, but that doesn't change the take home message.
If you want to worry about things, it is possible that the Strange Matter Hypothesis is true, and that stable stranglets could be created, converting the earth into a quark star - a hypernova which would surprise all our galactic neighbours.
But what happens when you are half in and half out?
Jonathan Ribee
Unavailable at present
Vino Collapso
pfm Member
MichaelC
pfm Member
Martin's link earlier refers. Can anyone translate this into something meaningful for me?
Fermilab physicists discover “doubly strange” particle
Batavia, Ill.—Physicists of the DZero experiment at the U.S. Department of Energy’s Fermi National Accelerator Laboratory have discovered a new particle made of three quarks, the Omega-sub-b (Ωb). The particle contains two strange quarks and a bottom quark (s-s-b). It is an exotic relative of the much more common proton and weighs about six times the proton mass.
The discovery of the doubly strange particle brings scientists a step closer to understanding exactly how quarks form matter and to completing the “periodic table of baryons.” Baryons (derived from the Greek word “barys,” meaning “heavy”) are particles that contain three quarks, the basic building blocks of matter. The proton comprises two up quarks and a down quark (u-u-d).
Combing through almost 100 trillion collision events produced by the Tevatron particle collider at Fermilab, the DZero collaboration found 18 incidents in which the particles emerging from a proton-antiproton collision revealed the distinctive signature of the Omega-sub-b. Once produced, the Omega-sub-b travels about a millimeter before it disintegrates into lighter particles. Its decay, mediated by the weak force, occurs in about a trillionth of a second.
Theorists predicted the mass of the Omega-sub-b baryon to be in the range of 5.9 to 6.1 GeV/c2. The DZero collaboration measured its mass to be 6.165 ± 0.016 GeV/c2. The particle has the same electric charge as an electron and has spin J=1/2.
The Omega-sub-b is the latest and most exotic discovery of a new type of baryon containing a bottom quark at the Tevatron particle collider at Fermilab. Its discovery follows the observation of the Cascade-b-minus baryon (Ξb-), first observed by the DZero experiment in 2007, and two types of Sigma-sub-b baryons (Σb), discovered by the CDF experiment at Fermilab in 2006.
“The observation of the doubly strange b baryon is yet another triumph of the quark model,” said DZero cospokesperson Dmitri Denisov, of Fermilab. “Our measurement of its mass, production and decay properties will help to better understand the strong force that binds quarks together.”
According to the quark model, invented in 1961 by theorists Murray Gell-Mann and Yuval Ne’eman as well as George Zweig, the four quarks up, down, strange and bottom can be arranged to form 20 different spin-1/2 baryons. Scientists now have observed 13 of these combinations.
“The measurement of the mass of the Omega-sub-b provides a great test of computer calculations using lattice quantum chromodynamics,” said Fermilab theorist Andreas Kronfeld. “The discovery of this particle is an example of all the wonderful results pouring out of accelerator laboratories over the past few years.”
The Omega-sub-b is a relative of the famous and “even stranger” Omega-minus, which is made of three strange quarks (s-s-s).
“After the discovery of the Omega-minus, people started to accept that quarks really exist,” said DZero co-spokesperson Darien Wood, of Northeastern University. “Its discovery, made with a bubble chamber at Brookhaven National Laboratory in 1964, is the textbook example of the predictive power of the quark model.”
The DZero collaboration submitted a paper that summarizes the details of its discovery to the journal Physical Review Letters. It is available online at: http://www-d0.fnal.gov/Run2Physics/WWW/results/final/B/B08G/
DZero is an international experiment of about 600 physicists from 90 institutions in 18 countries. It is supported by the U.S. Department of Energy, the National Science Foundation and a number of international funding agencies. Fermilab is a national laboratory funded by the Office of Science of the U.S. Department of Energy, operated under contract by Fermi Research Alliance, LLC.
A list of the DZero collaborating institutions is at http://www-d0.fnal.gov/ib/Institutions.html
Fermilab physicists discover “doubly strange” particle
Batavia, Ill.—Physicists of the DZero experiment at the U.S. Department of Energy’s Fermi National Accelerator Laboratory have discovered a new particle made of three quarks, the Omega-sub-b (Ωb). The particle contains two strange quarks and a bottom quark (s-s-b). It is an exotic relative of the much more common proton and weighs about six times the proton mass.
The discovery of the doubly strange particle brings scientists a step closer to understanding exactly how quarks form matter and to completing the “periodic table of baryons.” Baryons (derived from the Greek word “barys,” meaning “heavy”) are particles that contain three quarks, the basic building blocks of matter. The proton comprises two up quarks and a down quark (u-u-d).
Combing through almost 100 trillion collision events produced by the Tevatron particle collider at Fermilab, the DZero collaboration found 18 incidents in which the particles emerging from a proton-antiproton collision revealed the distinctive signature of the Omega-sub-b. Once produced, the Omega-sub-b travels about a millimeter before it disintegrates into lighter particles. Its decay, mediated by the weak force, occurs in about a trillionth of a second.
Theorists predicted the mass of the Omega-sub-b baryon to be in the range of 5.9 to 6.1 GeV/c2. The DZero collaboration measured its mass to be 6.165 ± 0.016 GeV/c2. The particle has the same electric charge as an electron and has spin J=1/2.
The Omega-sub-b is the latest and most exotic discovery of a new type of baryon containing a bottom quark at the Tevatron particle collider at Fermilab. Its discovery follows the observation of the Cascade-b-minus baryon (Ξb-), first observed by the DZero experiment in 2007, and two types of Sigma-sub-b baryons (Σb), discovered by the CDF experiment at Fermilab in 2006.
“The observation of the doubly strange b baryon is yet another triumph of the quark model,” said DZero cospokesperson Dmitri Denisov, of Fermilab. “Our measurement of its mass, production and decay properties will help to better understand the strong force that binds quarks together.”
According to the quark model, invented in 1961 by theorists Murray Gell-Mann and Yuval Ne’eman as well as George Zweig, the four quarks up, down, strange and bottom can be arranged to form 20 different spin-1/2 baryons. Scientists now have observed 13 of these combinations.
“The measurement of the mass of the Omega-sub-b provides a great test of computer calculations using lattice quantum chromodynamics,” said Fermilab theorist Andreas Kronfeld. “The discovery of this particle is an example of all the wonderful results pouring out of accelerator laboratories over the past few years.”
The Omega-sub-b is a relative of the famous and “even stranger” Omega-minus, which is made of three strange quarks (s-s-s).
“After the discovery of the Omega-minus, people started to accept that quarks really exist,” said DZero co-spokesperson Darien Wood, of Northeastern University. “Its discovery, made with a bubble chamber at Brookhaven National Laboratory in 1964, is the textbook example of the predictive power of the quark model.”
The DZero collaboration submitted a paper that summarizes the details of its discovery to the journal Physical Review Letters. It is available online at: http://www-d0.fnal.gov/Run2Physics/WWW/results/final/B/B08G/
DZero is an international experiment of about 600 physicists from 90 institutions in 18 countries. It is supported by the U.S. Department of Energy, the National Science Foundation and a number of international funding agencies. Fermilab is a national laboratory funded by the Office of Science of the U.S. Department of Energy, operated under contract by Fermi Research Alliance, LLC.
A list of the DZero collaborating institutions is at http://www-d0.fnal.gov/ib/Institutions.html