The physics of g-2
Vložit
- čas přidán 3. 05. 2016
- At any time in history, a few scientific measurements disagreed with the best theoretical predictions of the time. Currently, one such discrepancy involves the measurement of the strength of the magnetic field of a subatomic particle called a muon. In this video, Fermilab’s Dr. Don Lincoln explains this mystery and sketches ongoing efforts to determine if this disagreement signifies a discovery. If it does, this measurement will mean that we will have to rewrite the textbooks.
Related videos:
• Quantum electrodynamic...
• QED: experimental evid... - Věda a technologie
This video has aged very well! :)
like a fine wine!
Exactly
yes
Anyone else watching this after the results of the latest experiment? This video is such a wonderful gift from the past that now points to the present and an increasingly exciting future for particle physics :)
I didn't notice the date, and thought it was an update from Don himself about the recent news.
Me too, looks like the algorithm does have some AI after all.
I remember watching this a few years ago, and yes like you came back after the first set of results were published. I was happy to see that I actually posted a comment in anticipation of this 4 years ago, as I totally forgot doing so, so it's cool to see my prior enthusiasm on the matter rekindled. Especially since I totally forgot about it.
Anyway, it's cool that the experimental results did disagree with prediction to the point that it confirmed the discrepancy with the Brookhaven findings. Now the question will come down to whether some portion of the QCD calculation and prediction in the standard Model is at fault, and if it can be modified to match experiment, or if some new physics has to be created to account for the experimental discrepancy. I'd guess that we will see attempts at both, but the former will be the primary focus and eventual solution. Though, what the hell do I know? I am just happy to see physics still kicking along, and am hoping this, and many other contributions narrows the theories down so future generations can finally incorporate general relativity (without using the S(U) 2 gauge gravitons as an unscientific crutch) and dark matter and dark energy, and get close to that Popperian verisimilitude.
Poor old Gravitons, never truly accepted and causing problems everywhere they go. All the other elementary particles got their issues sorted out, the gravitons just wanted a spin too.
@SpudHead no AI needed, just plain old keyword relevance.
Congratulations to the team @ Fermilab for pushing the boundaries of our knowledge and getting us closer to the answer. Onwards to 5 Sigma!!
Well, this has aged well!
This is exciting!
Damn! It takes physicists to take the phrase "mind if I borrow that?" to a whole new level.
after watching the news and getting depressed over humanity's stupidity, I like to watch this channel to heal
Science and space give me hope towards a better future. One away from politics and infighting
Dr. Lincoln, it is time now for a new video😉
Congrats to the Fermilab team on the big discovery. Looking forward to seeing what new additions to the standard model it will uncover
What was the discovery?
m.czcams.com/video/ZjnK5exNhZ0/video.html
m.czcams.com/video/PpZo6ZZ-PBI/video.html
Good to be back after 4 years, on hearing about the news on the recent g-2 findings. These videos really personify "See you all in few years when this gets recommended again" 😂
Congratulations to Fermilab for their new discovery!
It will be interesting to see if this will indicate that there is a problem with the standard model.
Muons're trollin ya
This video needs an update :) we are waiting for the results. Any change in the theoretical calculations?
Could you also describe these concepts in one of your excellent videos? (Or maybe you already have and I just need to watch more? :) )
@@jaimeduncan6167 data collection (the string of expermients) is scheduled to finish in 2020.
@@krzysztofbroda5376 hows it going?
Well, here we are in 2021 and it looks promising that G-2 has shown us something special.
It's amazing to finally hear news from g-2 experiment lately, so exciting!
What a cliffhanger, I'm glad it's resolved!
resolved?/
This channel is super easy to understand to me and very interesting, thanks :)
+Zebruh MLZ You should check out PBS Spacetime. Awesome, complex but easy to understand thx to great host.
I'll check out PBS Spacetime.
So, what happened? It's been a few years. A link to a following video?
Two years of data acquired. Third run is going to start. Goal is to acquire 4 years of data to achieve the goal. Results based on the first run will most probably be published around the end of this year, which may not say something conclusive yet as it’s based on just 1/4th of total data. So 🤞
@@atanunath Ok, its almost May 2020. I get cramps from keeping my gingers crossed :p
@@blueredbrick In my experience the gingers work better when they're not cross. Cross gingers are super dangerous anyway.
@@shatterthemirror8563 LIke Streams!
@@blueredbrick never cross your gingers, they can have genetic deformities, always cross a ginger with a blonde or black
I am very interested in g-2. I remember when you first started talking about the Brookhaven experiment, and the move of the detector from Brookhaven to Fermilab. Gald to see that went smoothly and now the long, arduous task of installation and tweaking it can begin. I'm sure when you get that data in a few years, most of us will hear it here first, and probably to great fanfare and excitement. DFTBA.
Well, now you have it. The breakthrough is here?
Not yet 5 sigma... And it is using the same detector as the previous experiment.
5s or nothing
@@Dragondezznuts well, i mean, 5 sigma is a bar we put there because we wanted, it could have been 4 or 6 .-.
4.2σ
Funnily, in life sciences such as psychology or pharmacology that affect our daily existence, the standard of proof is a tad below 2 sigmas (95%, p
I really love these videos. Please keep them coming.
Brilliantly explained! Love this documentation!
best physics channel out there
Fascinating! Thank you for this video!
I've watched the Fermilab press conference, the PBS Spacetime discussion about the Muon G-2 experiment, and re-watched Dr Lincoln's presentation. I understand the experiment as well as a layman without a grounding in graduate level physics (but with knowledge of grad level statistics) could. I'm continually impressed that physicists require a sigma of 5 to declare a discovery; too bad this requirement isn't applied in "climate science." I'm looking forward to the publication of Fermilab's second and later experimental results. How fascinating it would be if physicists could incorporate gravity into a theory!
Here after the published results, hoping for more results of the five runs to get the sigma 5 and confirm we are missing something fundamental!
WoW! It's really impressive to see their level of hardwork and dedication!
Watching this after watching the video about First Results of the experiment.
Fantastic explanation. It's truly spot on!
so correct me if I'm wrong but if the experiment produces a value whose standard deviation doesn't overlap the theoretical standard deviation, then we might have a magnetic dipole value for a partical that isn't a muon? so there might be a new partical (not surprising) waiting to be discovered
Great vid guys! Thanks and regards from the other side of the pond.
I love all your videos
Thank you. This is by far the best layman explanation.
It has been over a year since you made this video. Can we get an update on progress? Also, I find the prospect that a discovery can be made with the strong beams at Fermi exciting. Are there other things that can only be done at fermi?
phys.org/news/2019-03-muon-g-.html
I love this channel so much! We need more of this sort. The internet and CZcams are particular is flooded with misinformation on science matters. The growth of anti intellectualism in America can only be overcome by having more channels like this and more people watching them. Google needs to change their search algorithm to favor real science and for any conspiracy junk, they should list the "debunk" and actual science videos first so people get out of their bubbles of ignorance.
Suggesting this vid after the results are published is probably the one thing yt algorithm has done right
Thanks for the latest video!
I didn’t know they had to take 4 years to relocate and build this. Unbelievable amount of work I wouldn’t dare to think of, just to validate one point. Amazing.
Great video! If indeed there is a discrepancy between the prediction and measurement, what kind of new physics might we be looking at? Are there any good hypotheses as to what might cause this?
+TheNoobSensei There are a number of theoretical models, including a certain class of supersymmetric models, that could account for a deviation of muon g-2 from the Standard Model. This measurement, however, does not necessarily distinguish between them. That will likely require the discovery of certain event signatures at LHC or beyond. The key is that measuring muon g-2 to high precision is equivalent to probing the Standard Model at high energy (TeV range). The better the precision, the higher the corresponding energy scale. The investigations are complementary.
Dr. Lincoln not having a mustache back then is quite a six-sigma observation!
Out of Breathe ? You have to remember that, “ It takes a lot of GUTs to work in Particle Physics ! ! “. There! I finally found
A venue to work that joke into. Great Video Collection Dr. L. ! Kudos! Darth Airborne Nobody 55’ NYC
What would it take to make the _prediction_ more precise instead (or in addition to) the measurement?
Although I had to google all the weird measurements at 5:00, nobody except the US still uses, very exciting video. Thanks!
PS: Maybe you could provide some annotations or subtitles with proper metric measures next time? Thanks in advance.
Great video, What would the possible implications be if the measurement does not fit the standard model (Predicted Measurement)?
Either the theory is wrong, or we have new physics. A new particle, or a new force.
I'm hoping Don will have a new video soon on this subject.
I would be interested in any discussions on BMW theoretical model vs the Theory Initiative
Much like, very wow. Keep up the good work
RESULTS ANNOUNCED!!! 4.2 sigma let’s goooo!!!!!!
Super show.Keep going.
Could it be that other values, that are used in the standardmodel, to calculate the value of "g" are with a certain degree of uncertainty? Could that explain the difference mentioned?
I'm sure I'm missing something but isn't the g factor of the electron and muon 2.00 and not 1.00xx.? hence the name g-2? The experiment looking to find the deviation from 2.0
How often does a sensor's electronics package introduce unintended offsets in the sensor data? I mean above and beyond normal calibration issues.
Its been 2 years now ,have they began the research and if so are there any significant results! Love the videos keep them comeing!👍
phys.org/news/2019-03-muon-g-.html
THANK YOU PROFESSOR LINCOLN...!!!
Is there an update on this city G-2 experiment now that it has been a couple years?
There is an anomaly :DD
oh boy is there!
Can you do a video explaining the Scalar field please, and while you're at it, why string theory needs a monopole?
Temperature is a scalar field, wind velocity is a tensor field. There you go buddy.
@@av6569 Idiot! Clearly not THAT scalar!
perhaps a more accurate way to say it would be that the confidence of "discovery" will be higher, but not 100% as the curves still overlap.
One of the reasons i LOVE particle physics is because we get to smash stuff for fun.
This is incredible!
I wish Physics had the budget that exceeded the defence budget
Imagine how much time could be saved
We can fast forward all research by generations
How many new weapon principles could have been discove--
Oh wait...
@@sashimanu Correct. Let's become caveman again. Idiot.
This is from 3 years ago. So where's the follow-up video to this one?
Great upload, it's unbelievable how arduous the task of getting g-2 to batavia must have been. The sooner this thing gets operational the better.
Tenth of an inch!!
how about a video that explains the technical difficulties in moving the detector
phys.org/news/2019-03-muon-g-.html
This is the third video I have seen on this result, how about a video that speculates on what the new physics might be?
They have no clue at all, save already finished crap like string theory. There is not even a theory explaining the existence of the muon.
Dr. Don- howe about an update for 2021?
nice Video, can you do a series where you give intro to theoretícal physics from the beginning because i know what string theory is or dark matter or higgs field but i do not understand the math.
+ScienceNinjaDude you can never get around hard work, the math is just as rewarding!
That's what I'm saying
Yeah, there's a reason these videos are concept-level not math-level.
***** but the Basics
Pablo Fahrner Y DONT U PONDER AND RESEARCH NEWTONS IDEA OF “ETHER” and how it relates to Higgs field and or quantum foam?!
Why did it take such a roundabout path to Chicago? Was that the safest route because of the mountains? And why was flying not an option, too risky?
+ScienceNinjaDude The weight was not really the issue since they were transporting only the superconducting coils. In fact the original proposal did include a flight plan by helicopter for part of the trip, but there was not a sufficiently clear flight path. Of course, the flex constraint was very important, as you mention. The reason the barge did not take the shorter northern path was the lack of sufficient safe harbors in case of unexpected bad weather. The southern/mississippi route was longer, but considered safer.
+ScienceNinjaDude Well, this is the explanation I got when I asked the Emmert guys why they didn't take the barge along the shorter route up the St. Lawrence, for example. As for the flight portion, there are military helicopters that could have taken the ring at least to a waiting barge, but I was told that any path would have passed over too many residences. Not to mention the number of UFO sightings that would have resulted from a 50' metallic ring flying over people's homes.... ;-)
5:16 You couldn't drive a much shorter path from NY to Chicago?
I mean, your video already shows some of the trip you took is by driving on road, anyway,
if there was an issue with riding on water being safer/better than driving on road.
They had to shut down the road to move the thing. You also have to make sure that every bridge along the way is big enough. And it moves very slowly, at a walking pace.
Amazing how they moved it. People can do amazing things.
Good one.
i kinda want to take a tour of fermilab and see all the types of detectors there
+ScienceNinjaDude but I live all the way in Maryland
This video aged like fine wine.
it did point us to the next big scientific breakthrough.
So what was the finding?
What say the latest measurements?
And they did it! Congratulations!
I have a dream - of ultra precise g-2 measurements of the tauon
I have been reading everything I can find;
As of just yet I cannot grasp which "particles" are 2-quark and 3-quark and which are which of the named resonances ~ I am beginning to develop nascent thoughts to the effect that all tangible ( lends to a detector sort of "tangible" ) are actually a dissonance of some kind with the idea that squiggly green line we see will never fully resolve until the Keebler elves de-cloak
@@ChiDraconis Do you need help finding better sources? I think you've stumbled upon some seriously esoteric stuff
@@TheSandkastenverbot
I found 2 channels which are supplying the demand in response to the Muon g-2 issue ·
Clumsy tool this intermittent internet thing though if I need anything in the way of help it is that most works rely on a Math type mind and I am a visual thinker so let's take for the moment the Lambda in the middle of a Bra-Ket → Seems very obvious that it is a way of noting parameters which are not known but did not grasp it and also why the light cone often is presented as a second order hyperbolic yet solid ( 3-d ) comes up 4-🥧 as a spherical
Wow, how about new (7.4.2021) results?
all those brilliant scientists...I wish 1 of them could explain why did g-2 had to take a trip around the globe just to get from NY to Chicago...
4 years later we confirm the deviation
Imagine that the electron is actually a system of smaller particles, different types of quarks
And imagine that there are different types of electrons
Can this new physics reveal such a hypothesis?
please make a follow up video
1:10 I thought muons are the heavy brothers, not the heavy cousins, of the electrons.
Anyway, the hadronic drek is going to spoil everything.
Well this video aged well.....
What if the experiment is run at a different spacetime curvature?
if y axis represents how likely the predicted answer is, what does x axis represent?
+ScienceNinjaDude thanks!
When I saw the title I looked at the g-2 and thought "Is this about negative gravity? So a gravity pulling you upwards? and then when I watched the video, I realized that the g-2 had nothing at all to do with gravity, it was just the name of a particle accelerator.
One year has passed! how long to go?)
ScienceNinjaDude Wow, good to know! Good luck! :)
phys.org/news/2019-03-muon-g-.html
How is it even possible to measure these things to such an incredible accuracy? 😲
You do the measurement millions of times.
Wow! New physics there we go!
Bravo!
Are we there yet?
No
This channel is better than PBS Spacetime
Not better, just different. They compliment each other.
#energytransitions #highenergytransitions
#muonbeams
This will go viral again
Damn this is old video, youtube played me
@around 6:23...Unfortunately, I cannot understand how an experimental measurement can have a smaller standard deviation than the theory. That alone, I would argue, says the theory is incomplete.
An experimental measurement does not depend on a theory at all. The errors in a measurement come from the conditions of the experiment and the apparatus and method used.
@@stargazer7644 My question was addressing the theory error, not the experimental error. I can see why you can reduce the experimental error. That is clear.
and here we are 5 years later lol
Could -please- the speaker -staying- still instead be -an oscillator- on the stage that’s very unfocusing during his presentation that could be very interesting if will be different from a tennis match to follow? Thank you. BTW; some of hide should emerge from the incorporeal mind of the physicists if the majority of them is affect by behavior peculiarities...
I didn't have any idea about the g-2 experiment now I am super impatient to get results from it! >
GREAT!!!! :D
Do you have any idea of how long it may take us to see the first results? :D
Well, we'll have to wait until next year then.
hoping for exciting new results but....
... we know the Standard Model is going to pass through it clean again without a scratch right? hahaha >_<
:P
So...what happened? Is somebody getting a nobel prize for breaking the standard model or did things work out?
@@sphaera2520 they just have
Update about the experiment:
phys.org/news/2019-03-muon-g-.html
So, I guess this video may need an update.
Is it a new discovery as in a new particle?
+ScienceNinjaDude a new particle in the sense that there may be an unknown particle mixed in with what they assumed was a pure beam of nothing but muons?
or did you mean in another way?
I've always wondered, those accelerated proton beams at CERN and other places, is it known if they have any impurities mixed in? or do they know with pretty good certainty that they aren't accelerating other particles?