Neutrinos' maximum possible mass shrinks further
sciencenews.org
sciencenews.org
We'd put this on the road in the US without much fanfare. You'd need some civil engineers to check the road ratings and clearances.
I mean, this is what we consider heavy for roads in the US: https://www.youtube.com/watch?v=Y4pn4a4a2lA
Edit: I can't read. It's 200 tons not 100 tons. That's getting heavy, but I would still expect things like the autobahn to be able to handle that with an appropriate carrier.
The Jochenstein lock that was mentioned is 7.8m and they barely cleared under it. That would be quite a tall load and then you have to add the height of the carrier. You can easily run out of options for something that tall and the German routes look like they use cloverleaf interchanges which could easily be obstacles.
> load fits in the 14' height limit for interstates in the state of Texas
There are special routes up and out from the Houston ship channel that use mostly diamond interchanges that could accommodate even something like this. However, the roads that this would have traversed in Germany are laughably small by Texas freeway standards so I can certainly see there being no way to get between the two points.
It looks like they only just squeezed under a bridge on the Danube in the bottoms pictures
After you insure your cargo, you take the exact route the bureau provided, and if something happens due to road conditions, government pays your damages.
Dad was working in insurance. This is the standard procedure.
That is not how it works in Texas.
Yes, the state gives you a route. However, it is always the responsibility of the carrier to make sure that everything on the way has appropriate ratings and heights. If the state runs your 15' load under a 14' 6" bridge or runs your 80,000lb load over a 40,000lb rated bridge, it is incumbent upon the driver/carrier to not hit the bridge or collapse it.
I knew several of the people who used to work out these permits. If they missed something, sometimes a driver would have to back a load up (yes, in reverse as the load would be too big to turn around) for 20 or 30 miles to change routes. If you were on an unusual route, for some reason, the maps they used didn't always have the correct heights marked for every interchange.
For reference, a proton has a mass of 938.272 MeV and an electron has a mass of 0.5110 MeV, so this is extremely 'light' in comparison, less than a millionth of an electron.
Well, from what I understand, the mass eigenstates and the flavor eigenstates for neutrinos aren’t the same, so a mass eigenstate is a linear combination of the different flavor eigenstates, and a flavor eigenstate is a linear combination of the different mass eigenstates,
But, in these experiments with the electron neutrino, which is a flavor eigenstate, well, it isn’t in a mass eigenstate, so, what does that say about the momentum and such?
And like, when they use this to get a bound on the mass, is this like, a bound on the mass of the largest of the 3 mass eigenstates, or of the expected value of mass when in the electron neutrino flavor eigenstate, or what?
It was really impressive. The whole northern campus is full of giant science experiments like this one, old nuclear test reactors and so much more. I'm glad I got the opportunity to see it. They even got an entire water treatment plant, direct heating and direct cooling networks and produces more electricity than it uses on average.
I was really fascinated by the scale of everything. The direct heating plant for example uses a few giant room sized gas-burning generators and uses their excess heat. But just for backup, in case gas drops out there are also 2-3 absolutely massive tanks next to the building that hold something like 2 million or so liters diesel fuel each, just as a backup. One of the technicians joked "yeah, we fill up a few thousand liters now and then when its cheap"
All in all absolutely amazing experience and really cool campus.
What is this 0.45 eV then? Are they still running the measurements and trying get to 0.2 eV or this is maximum they can achieve?
[ I misread the original article explaining their equipment and project - their goal is to go all the way down to 0.2ev ]
I'd like to see an experiment that's sensitive enough to eliminate the m=0 hypothesis. Their prediction of m^2 = -0.14eV^2 is a bit disconcerting.
Kind of like how lifting a mass involves increasing the g h , so costs energy m g h ?
When rest mass is stated in energy units such as eV, they're calculating it using E=mc^2.
But since E=mc², you can say the mass is X eV/c² and then people become lazy and forget the c² or even define a new system of units in which c=1.
One Joule of energy is what you get when you move one Coulomb of charge across a 1V potential.
One electronVolt (eV) is the energy you get from moving one electron's worth of charge across 1 volt of potential.
It's an accident of what we chose to be a Joule of energy and what we chose to be a Coulomb of charge, so there should be no expectation that this would turn out to be the mass of an electron (when divided by the square of the speed of light, which is unstated because everyone knows E = mc^2).