Long-Awaited Muon Physics Experiment Nears Moment of Truth
The collaboration at FNAL announced their result today.
g-2comp_1.jpg
In particle physics, a 5 sigma result is the threshold for new physics.
The big question now is not the experimental result but whether the theoretical value is accurate as it involves a very challenging series of calculations involving QCD contributions of the strong nuclear force.
Long-Awaited Muon Physics Experiment Nears Moment of Truth
The collaboration at FNAL announced their result today.
g-2comp_1.jpg
In particle physics, a 5 sigma result is the threshold for new physics.
The big question now is not the experimental result but whether the theoretical value is accurate as it involves a very challenging series of calculations involving QCD contributions of the strong nuclear force.
You beat me to it. I hit Preview instead of Submit and walked away for a few minutes.
. . . Sorry.
No problem
Doc wrote: ↑Wed Apr 07, 2021 8:09 pm
The possibility of new particles and or forces is huge.
Perhaps. However, the probability of detecting them with current experimental capabilities is quite small.
There is also the economic aspect as in "No bucks, no Buck Rogers."
Yeah I was wondering about that. I watched the press conference pretty much as it happened. It was a bit confusing on the Sigma level, and how large they thought they could make it. But it was pretty clear that what they had accomplished thus far was amazing.
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
Long-Awaited Muon Physics Experiment Nears Moment of Truth
The collaboration at FNAL announced their result today.
g-2comp_1.jpg
In particle physics, a 5 sigma result is the threshold for new physics.
The big question now is not the experimental result but whether the theoretical value is accurate as it involves a very challenging series of calculations involving QCD contributions of the strong nuclear force.
You beat me to it. I hit Preview instead of Submit and walked away for a few minutes.
. . . Sorry.
No problem
Doc wrote: ↑Wed Apr 07, 2021 8:09 pm
The possibility of new particles and or forces is huge.
Perhaps. However, the probability of detecting them with current experimental capabilities is quite small.
There is also the economic aspect as in "No bucks, no Buck Rogers."
Yeah I was wondering about that. I watched the press conference pretty much as it happened. It was a bit confusing on the Sigma level, and how large they thought they could make it. But it was pretty clear that what they had accomplished thus far was amazing.
The experiment is a technical tour de force.
The issue is with the theoretical calculation to which the experimental g - 2 result is being compared.
A just-published new approach [lattice QCD] to calculating the tricky bit [the hadronic component] is in agreement with the experimental result rather than differing by 4.2 sigma.
While the experiment continues to run the theorists have their work cut out for them reconciling these different results from different methods of calculation.
The collaboration at FNAL announced their result today.
g-2comp_1.jpg
In particle physics, a 5 sigma result is the threshold for new physics.
The big question now is not the experimental result but whether the theoretical value is accurate as it involves a very challenging series of calculations involving QCD contributions of the strong nuclear force.
You beat me to it. I hit Preview instead of Submit and walked away for a few minutes.
. . . Sorry.
No problem
Doc wrote: ↑Wed Apr 07, 2021 8:09 pm
The possibility of new particles and or forces is huge.
Perhaps. However, the probability of detecting them with current experimental capabilities is quite small.
There is also the economic aspect as in "No bucks, no Buck Rogers."
Yeah I was wondering about that. I watched the press conference pretty much as it happened. It was a bit confusing on the Sigma level, and how large they thought they could make it. But it was pretty clear that what they had accomplished thus far was amazing.
The experiment is a technical tour de force.
The issue is with the theoretical calculation to which the experimental g - 2 result is being compared.
A just-published new approach [lattice QCD] to calculating the tricky bit [the hadronic component] is in agreement with the experimental result rather than differing by 4.2 sigma.
While the experiment continues to run the theorists have their work cut out for them reconciling these different results from different methods of calculation.
The lattice paper first appeared a year ago but only yesterday was published in Nature in a well-timed move that can be compared to an ex crashing a wedding party
Seems like there is quite an argument going on in the comments. I had to double check to see if it was a US Politics site.
Anyway it seems great things are about to happen for the human race, as long as we don't blow ourselves up first.
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
Pi in the Sky: General Relativity Passes the Ratio’s Test
Using gravitational waves to approximate pi, physicists see no problem with Einstein’s theory
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
Pi in the Sky: General Relativity Passes the Ratio’s Test
Using gravitational waves to approximate pi, physicists see no problem with Einstein’s theory
Timely video on how LIGO will be improved in the sensitivity of its measurements
uZDhCW-PTRM
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
Theorists have shown that patterned surfaces can transform the emission from a hot object into a polarized, focused light beam.
e84_1.png (509.53 KiB) Viewed 3115 times
Surface transformer. A design for a “thermal metasurface” would allow thermal radiation from an object to be converted into a beam with a specific direction, polarization, and wave-front shape.
May the gods preserve and defend me from self-righteous altruists; I can defend myself from my enemies and my friends.
Theorists have shown that patterned surfaces can transform the emission from a hot object into a polarized, focused light beam.
e84_1.png
Surface transformer. A design for a “thermal metasurface” would allow thermal radiation from an object to be converted into a beam with a specific direction, polarization, and wave-front shape.
That is visually, a pretty cool picture.
I wonder if the wave length of 224 nm is doable.
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
Theorists have shown that patterned surfaces can transform the emission from a hot object into a polarized, focused light beam.
e84_1.png
Surface transformer. A design for a “thermal metasurface” would allow thermal radiation from an object to be converted into a beam with a specific direction, polarization, and wave-front shape.
Over the past century, quantum field theory has proved to be the single most sweeping and successful physical theory ever invented. It is an umbrella term that encompasses many specific quantum field theories — the way “shape” covers specific examples like the square and the circle. The most prominent of these theories is known as the Standard Model, and it is this framework of physics that has been so successful.
“It can explain at a fundamental level literally every single experiment that we’ve ever done,” said David Tong, a physicist at the University of Cambridge.
But quantum field theory, or QFT, is indisputably incomplete. Neither physicists nor mathematicians know exactly what makes a quantum field theory a quantum field theory. They have glimpses of the full picture, but they can’t yet make it out.
May the gods preserve and defend me from self-righteous altruists; I can defend myself from my enemies and my friends.
Quantum sensing may probe the universe
Oct. 20, 2021
After enhancing LIGO's ability to record gravitational waves from across the universe, quantum sensing is being tuned up to hunt for elusive dark matter.
“Quantum sensing has been pursued for a longer time than quantum computing, going back to the early days of the squeezing of light to generate a quantum state of light over three decades ago,”1 says John Bollinger of NIST (Boulder, CO). Since then, squeezed light has been used to increase the sensitivity of optical measurements, and to entangle light for quantum-key distribution.2 But according to Bollinger, the first application of quantum sensing that is “making a difference” in fundamental physics is the use of squeezed light to lower the noise floor of the Laser Interferometer Gravitational-wave Observatory (LIGO), starting in 2019.
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
As is always the case in such precision experiments, the devil is in the systematic uncertainties - effects that could produce a false positive result.
May the gods preserve and defend me from self-righteous altruists; I can defend myself from my enemies and my friends.
Typhoon wrote: ↑Fri Feb 18, 2022 7:13 amAs is always the case in such precision experiments, the devil is in the systematic uncertainties - effects that could produce a false positive result.
That’s what I was worried about. Gravity is such a weak force that any little thing, like a bit of static electricity, could throw off the experiment. A remember how Gravity Probe B’s results were off due to a small classical torque.
However, they had enough data and math to deal with the problem, so perhaps they’ll be able to isolate what they want to test with the pendulum experiment, too.
My daughter is completely baffled by calculus. She’s not good at math and a poor prof.
Any resources y’all can recommend?
“Christ has no body now but yours. Yours are the eyes through which he looks with compassion on this world. Yours are the feet with which he walks among His people to do good. Yours are the hands through which he blesses His creation.”
I would suggest that calculus is like learning the alphabet and rules of a language, which is complex and pointless without a clear vision for wanting to write a book or enjoy literature.
on that level, being into robotics or computer graphics or some fields of science is the entry point, then the calculus becomes obvious, and even fun, as a means to an end.
robot kits are super cheap and fun now , kids are building self driving cars and drones and all sorts of things.
Nonc Hilaire wrote: ↑Sat Feb 19, 2022 5:40 am
My daughter is completely baffled by calculus. She’s not good at math and a poor prof.
Any resources y’all can recommend?
Tell her to do as many problems as possible. most text books have the answers in the back of the book to check against. There are also several Youtube videos that might help her.
"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros
Nonc Hilaire wrote: ↑Sat Feb 19, 2022 5:40 am
My daughter is completely baffled by calculus. She’s not good at math and a poor prof.
Any resources y’all can recommend?
Tell her to do as many problems as possible. most text books have the answers in the back of the book to check against. There are also several Youtube videos that might help her.
They no longer use textbooks in college. Students are forced to pay access fees for online access that expires at the end of semester.
“Christ has no body now but yours. Yours are the eyes through which he looks with compassion on this world. Yours are the feet with which he walks among His people to do good. Yours are the hands through which he blesses His creation.”
. . . Sorry.
