So far no sign of the existence of the supposed "sterile" neutrino has been found
Neutrino particles are divided into three types, or flavors: electronic, meonic and teutonic. But physicists suspect that there are other, very strange types that do not interact with other particles almost at all. These "sterile" neutrino particles can solve some of the biggest mysteries in physics. For example, they may be part of the elusive dark matter, which is apparently common throughout the universe and exerts a gravitational force on normal matter.
However, despite decades of searching, the sterile neutrino particles have not been discovered so far. The last attempt to capture them in action also failed. The physicists who run the "International Neutrino Reactor Experiment in Daya Bay" in China found no evidence of the existence of sterile neutrino particles after seven months of hunting.
This search experiment was conducted underground: the Daiya Bay neutrino sensors are buried at various depths beneath several nuclear power reactors in Guangdong Province. This location was chosen because the nuclear fission reactions that occur in nuclear reactors create electron neutrino antimatter particles in large numbers. Oddly enough, the neutrinos are able to change flavors in a process known as oscillation, so when these antimatter particles move, some of them change flavors and become muonic or tauonic antineutrinos and hit sensors in their path. Scientists know how to estimate the number of electron antineutrinos that should change their taste. They use this calculation to check the deepest sensors for missing electron neutrinos. Missing particles will indicate that some of the original particles have changed flavor to sterile neutrinos.
The absence of neutrino particles in Daya Bay "shows without a doubt that in the area examined by the experiment there is no chance of finding sterile neutrinos," says a member of the team of researchers in the experiment, physicist Milind Dewan from the American National Laboratory in Brookhaven. The negative results published in October 2014 in the journal Physical Review Letters rule out the existence of such particles only in a certain range of masses and properties. Therefore, the absolute truth about sterile neutrino particles is still unknown. The physicists at the experiment site will continue to search for a wider range of properties. In the end, even the first thirty years of searching for the Higgs boson turned up nothing.
49 תגובות
I'm not a physicist, but I have a two-year-old idea of how to test or even prove or disprove a connection with the force of "attraction"
For those unknown particles. In a simple physical experiment. Very happy to wash anyone who is interested in my idea and without compensation
my mail azbiodiesel@gmail.com
Yoda
Gegel Lesage, everything is there, including Feynman's and Maxwell's arguments.
how is english
To Israel
Not familiar with Calvin's arguments against pushing gravity. I would appreciate it if you could help me
Yehuda
Yoda
But which particles arrive to overcome the friction? In the ship model the friction will turn into heat. Remember Calvin's argument against Lesage's theory and pushing gravity? Same.
And I very much ask not to take the friction lightly. Without it you would not have been born.
Miracles
Indeed, and there is also a nice logical proof for this.
Now let's change the scenario:
We have the Leaning Tower of Pisa on the moon.
We bring a feather from the earth, drop it and measure the speed of impact on the moon.
The feather is returned to the earth, a hammer is brought to the tower, dropped and the speed of its impact on the moon is measured.
Will the two impact speeds, of the feather and the hammer, be the same?
Hint: according to escape velocity.
To Israel
You didn't understand the spirit.
What I am saying is that just as the ship moves in the ocean despite the friction, as long as there is a wind, so also the gravitation according to Le Sage will exist despite the friction, as long as particles arrive.
And regarding your question about Galileo's bodies, well according to Newton they move at exactly the same speed and will reach the bottom together, but according to La Saz the body that contains, for example, twice the mass will produce a lower gravity than twice because part of the mass will be shadowed by another mass and we will not meet with its particles So it will therefore move more slowly in its free fall than the light body.
Yehuda
Israel
In your case, I think they will hurt together.
Israel
Think of a XNUMX-kilo ball, compared to a long, light stick with half-kilo balls on the ends. The stick is parallel to the direction of fall.
not the same….
Miracles
What matters is the center of gravity, but technically you are right. If we take two balls with the same mass, but the first has a diameter of a centimeter and the second a kilometer, the second one will hit the moon first...
But we are dealing with the tip of a theoretical iodine: two identical balls of the same diameter but of different mass. We dropped them from the Tower of Pisa (which for the purpose of the experiment was sent to the moon). Who will arrive first?
Working.
Israel
I think that it is positive... a gravity field is not uniform, therefore, without analyzing too much, the center of gravity will be affected by the distance between the bodies. It seems to me that a large body will be "found" closer than a small body, even though their geometric centers are at the same height.
Think "tide and ebb".
Miracles
negative.
Wookie
Punch ball, hammer and feather. But the question is this: in Newtonian physics alone, if we take two bodies of different mass and drop them together at the same moment, will they reach the moon together with energetic precision?
https://www.youtube.com/watch?v=5C5_dOEyAfk
Israel
It also depends (I think) on their size.
Yoda
There is no spirit at Lesage's, there is none!
Gravity also exists in your room between the chair and the table and there is no wind of particles.
Regarding Galileo and Pisa, a question for the forum: Do all bodies really fall at the same speed regardless of mass?
Yehuda
All the people you mentioned are from the "those who understand the matter" group. So, I don't see you contradicting what I said.
Aryeh Seter, Nissim and others
Scientific progress almost always developed through those few who claimed things contrary to conventional wisdom. Let's start with Galileo who climbed the tower in Pisa and overturns Aristotle's theory, Copernicus who claimed that the sun is in the center contrary to what is accepted, and we will continue with Darwin and his evolution and of course Einstein and his theory of relativity, etc., etc., etc. And even the matter of the dark mass was a single operation of Fritz Tzviki, so please do not underestimate those exceptions that today determine otherwise from one of which the next scientific leap will come.
Yehuda
Aryeh Seter
I suppose there is good reason to assume that the observed cases of gravitational reflow are not the result of a black hole.
I didn't say that gravitational mixing proves the existence of dark matter - I say it is evidence of its existence.
What I do say is that if a vast majority of those who understand the matter claim A, and a few, who do not understand deeply, claim B, then I assume the majority is right. I think history shows that my approach is correct.
Miracles. It is true that this explanation and reason is similar; But note - gravitational clouding does not prove the existence of dark matter, but is caused by it (as by normal matter). The cooling can also be caused by other invisible bodies, for example a black hole.
Aryeh Seter
We see a phenomenon and the invention of a "dark matter lens" explains the phenomenon. In the real world, an explanation and a reason are pretty much the same thing, aren't they?
Yehuda
I still haven't seen what the explanation for your formula is, except for matching reality. What does it contribute?
Miracles. You wrote "From what I've read, dark matter provides an explanation for gravitational acceleration". To the best of my understanding, it does not provide an explanation, but rather causes confusion - like normal material.
Miracles
A black entrance hole as you know you don't see and only guess that it is there from all kinds of phenomena in the environment, the same goes for a white exit hole that is in a parallel universe at all, we have some signs left for the remains of I don't know what, so everyone explains them as they like and in general if it is the cat Schrödinger's so he's both alive and dead, so that's what it is. I'm going on a break. Bye.
Yehuda
Miracles
Of course my solution must explain all the things you brought up and I hope the links I gave will provide the goods. I don't have the energy to upgrade them and I'm also tired so good evening
Yehuda
Yehuda
Ok, the bullet is dark. But there is an entry hole for the bullet, and there is an exit hole, and there are metal remains where the bullet hit one of the ribs.
for miracles
You find a body and claim that it was shot by a .0.45 dark bullet. So allow me to doubt whether the cause of death is the aforementioned bullet. I also went through all the things that require an explanation and I have answers to everything, but explaining it will take a lot of energy and besides I'm already tired. So I'm going to rest.
Yehuda
I've said before that I don't think you have enough knowledge of physics to say a question since the pundits are so blatantly wrong. I want to emphasize that I understand the subject less than you.
From what I've read dark matter provides an explanation for gravitational acceleration. Does your explanation cover this phenomenon?
And again to my question: I understand that you claim that the gravity formula is wrong, and I asked for an explanation of the formula that you believe in.
In addition - I see in Wikipedia a lot of evidence (so to speak) for dark matter, such as gravitational flux, the scattering of the cosmic background radiation, the rotational speed of galaxies, and there must be more. All these are not explained in my understanding by changing the gravity formula. So why not prefer the dark matter explanation?
Your insistence on the fact that we haven't found it to this day is like saying: we found a body with a .0.45 bullet in the heart, but the fact that we didn't find the gun means that the man is still alive...
Erika!, Erika!, the third part has also passed, I hope the explanation in the links will be satisfactory!
If not?, I'm always at your disposal!
Did you notice what a beautiful day today is? I'm going to break my diet a bit and go make myself some roasted peanuts.
In the microwave for about three minutes!
Yehuda
Yes, yes, the second part has also passed!
We will move to the last part and pray.
I tried to interest my father in an article on the subject but I realized that he is interested in articles that are only in consensus.
I respect my father's wishes.
If anyone is interested, I might be able to coordinate a lecture with a presentation and explanation.
Please respond gently, don't forget that this is BS science.
Yehuda
Well, the first part is over. I won't risk it and write down the links that may be the problem identified. Just saying that if you type in Google "mass and dark energies Sabdarmish Yehuda" you will most likely reach my link of about 13 minutes. There is a link to Google Plus for another link of about an hour - a lecture I gave at the Mitzpe in Givatayim.
Reflections on the Parable of the Donkey and the Straw. There is no parable like a parable; While the dark substance is very useful and solves problems, the so-called dark hay cannot be eaten and has no benefit.
Miracles and singularities
And others
It is a bit unfair that when you show a problem, you are also required to find out about a possible solution to it. Agreeing that there is a serious problem here that impairs scientific progress is one thing. Finding a solution to it is another matter. But as we know, defining the problem is already half the solution. The problem we have as it is obtained from the spiral galaxies is that the gravitational force is less than the centrifugal force and therefore the galaxy is supposed to disintegrate after a rotation or two and this does not happen, meaning we have two formulas one for attraction and one for centrifugal force and they are supposed to be equal but they are not. Now it is easy to reach a solution by checking all the possible options to create the equality between the two formulas, this is a fundamentally algebraic problem that does not have to be cosmological. I will not go into more detail and for those who want to go to two links there it is explained.
for miracles
I answered you a long time ago, but my father's censors still haven't approved my beloved response to you. But I'll try to sneak it to you in parts under the censor's nose. Wish me luck
Yehuda
Yehuda
I didn't see your answer to my question.
Mr. Skeptic, grace, grace you, my heart was filled with a hint of pride and in my eyes it appeared to the flask, we will indeed be found righteous in Sodom, but I must warn you, at this moment you will enter the club of the oppressed on earth. Prepare to receive a cold shower from all the "experts". Accept it humbly and hopefully you will stand it bravely!
what a beautiful day!
Yehuda
In my humble opinion
Yehuda is one hundred percent right..
To Israel
I have a lot of Aesop stories like this, and since you're my friend, I'll tell you another one.
And the act that was, it was like this:
Newton, Le Sage and Israel Shapira, sailed in a sailing ship in the great cosmological ocean.
Newton said: According to my calculation we have a big friction problem here and therefore, a sailing ship will not be able to persist and sail in the great cosmological ocean. Le Sage thought for a moment and said: Please, Newton, don't tell that to the wind!
But there is here! Friction shouted Israel "Remember that without a solution to the problem of friction there is no revival of Pushing Gravity"
You must understand, my friend Israel, said Le Sagedermisch, that what is good for sailing ships in the great ocean that keep on sailing despite the friction with the water, air and wind, as long as the wind blows, is also good for everything that sails in the great cosmological ocean, as long as particles La Sage is pleasant.
Besides, my heart goes out to Arsenal who lost to Monaco
Happy Yom Tov dear Israel and I hope you enjoy the pleasure cruise.
Yehuda
Yehuda,
I'd like to congratulate you for managing to write almost 250 words (just one more to go... too bad), which, apart from implying that scientists who present evidence for dark matter are frauds, and that the people who believe this evidence are serious, has fantastically managed to avoid any need to address reality and admit that you're talking about something that you don't have the faintest idea about it, and that you refuse to study the evidence on principle.
Wouldn't it have been easier if you had simply written "Sevdarmish Yehuda does not forget life itself..." and spouted some nonsense about the Iranian nuclear that would blind the eyes of those who react to the fact that you are lying?
Yoda, what's up with you, Aesopus, are you coming for us in the morning? Are you sure it's dark oats and not dark barley? Because it seems to me that you sipped some black and dark beer with the fans of Cleveland and Maccabi, glug glug glug.
Remember that without a solution to the friction problem there is no revival of gravity pushing.
A donkey went to buy ten kilograms of hay from a fox. The fox was happy for the dear customer who came to his store and sold him a quantity of only XNUMX kg. The donkey asked the fox where are nine more kilograms? The fox answered no: You have ten kilos here, nine of which are dark. You don't see them but they fill all the explanation required for a donkey like you.
But the wise donkey was not so satisfied with the explanation, and insisted that he did not see something in this dark sales formula, but the fox, who is known for his great wisdom, did not despair and decided, with his great nobility and patience, to explain and teach the donkey a passage in wisdom:
See my donkey friend,
"As explained to you (100 times), the inaccuracy of Einstein's equations in the weak field approximation is only one of (many) reasons to believe that something needs to be changed in the gravitational description of a universe without a dark field. And what to do, when you look at the variety of problems (and not just the one you decided to focus on exclusively), you find that the dark straw is not only the only explanation, but it is also an incredibly accurate explanation that produces fantastically accurate predictions. That is, in case it is not clear, we listen exclusively to reality and try to find a model (formulas in your language) that fits it. What to do, despite your obsession, the model of Tevan Apple fits reality exceptionally well."
The donkey was happy for the successful and exhaustive explanation he received from the wise fox, the fox was also happy because what could be better than selling the donkeys an apple?
Only one Aton was angry at her successful husband who brings her a dark straw, but what is the opinion of a stupid Aton worth?
But the main thing is that Blatt and Cleveland won yesterday and Maccabi Tel Aviv also won,
And the sun is shining!
Good day to everyone!
Yehuda
Yehuda,
I have a question for you that is not related to physics.
If you repeat a lie 100 times, does it become the truth?
And now we will return to physics: as explained to you (100 times), the inaccuracy of Einstein's equations in the weak field approximation is only one of *many* reasons to believe that something needs to be changed in the gravitational description of a universe without dark matter. And what to do, when you look at the variety of problems (and not just the one you decided to focus on exclusively), you find that dark matter is not only the only explanation, but it is also an incredibly accurate explanation that produces fantastically accurate predictions. That is, in case it is not clear, we listen exclusively to reality and try to find a model (formulas in your language) that fits it. What to do, despite your obsession, the dark matter model fits reality remarkably well.
This is the stage where I would suggest you look at the variety of positive evidence for the existence of dark matter, but I have already provided you with a mountain of evidence (including peer-reviewed articles) and your response was, and forgive me for the paraphrase, "I'm not going to read these articles even if I did." I would not understand what is written in them because they are in English and require advanced knowledge in physics."
So, good luck with that. I congratulate you on finding a dragon to fight. It's just a shame that everyone except you sees it as a windmill.
Igal,
The sterility concerns their flavor, and does not mean that they are not a substance. Niortino has a mass (although very, very small, but certainly greater than 0), and even if it didn't - it would still perform a gravitational interaction due to its energy density.
Neutrinos are more or less "invisible" particles. But this in no way means that they do not interact gravitationally, and the neutral neutrino does as well.
For miracles and singularities
I responded and the response is delayed for the reason Your comment is awaiting moderation.
We will wait patiently. Good night
Yehuda
Miracles and singularities
And others
It is a bit unfair that when you show a problem, you are also required to find out about a possible solution to it. Agreeing that there is a serious problem here that impairs scientific progress is one thing. Finding a solution to it is another matter. But as we know, defining the problem is already half the solution. The problem we have as it is obtained from the spiral galaxies is that the gravitational force is less than the centrifugal force and therefore the galaxy is supposed to disintegrate after a rotation or two and this does not happen, meaning we have two formulas one for attraction and one for centrifugal force and they are supposed to be equal but they are not. Now it is easy to reach a solution by checking all the possible options to create the equality between the two formulas, this is a fundamentally algebraic problem that does not have to be cosmological. I will not go into more detail and for those who want to go to two links there it is explained.
The first one on YouTube in short, about 13 minutes,
https://www.youtube.com/watch?v=kAo5BQQpBqQ
And the second on Google Plus, a lecture I gave at the Israeli Astronomical Society for about an hour.
https://plus.google.com/106551135075786275187/posts
I tried to interest Avi Blizovsky in an article on the subject, but I understood that he is interested in articles that are only in consensus.
I respect my father's wishes.
If anyone is interested, I might be able to coordinate a lecture with a presentation and explanation.
Please respond gently, don't forget that this is BS science.
Yehuda
Yehuda, please share with us your next uncomplicated explanation to replace the dark matter theories
Yehuda
You did not answer me. If Newton's formula is wrong, then what is the physical explanation for the error?
for miracles
I will listen to your learned suggestion.
If so:
In my uneducated opinion, which I learned in the first physics class at my high school, when there is a discrepancy between the results measured in the field and the results obtained from a formula, the results measured in the field should be preferred and not the formula. But I learned this in my high school and maybe in another high school they taught it differently, so I really apologize and hope you will forgive me for my ignorance.
And another thing, dear Nissim, you are right that most of the scientists did not study at my high school and indeed their opinion is different and they do believe in mass and dark energy, but the majority does not always state that science is not a democracy. And so it can also be different. For example, most of those who understand said that the British Arsenal will defeat Monaco at home, but what to do that Monaco is the one that defeated Arsenal yesterday 3:1. So it is true that football is not exactly a science and the players are not exactly scientists, but it is what it is. Please respond gently.
Sabdarmish Yehuda
Yehuda
I'm not a physicist, but Newton's gravitation equation is intuitive, and it's simple.
If there is a correction to this equation, then is there a simple explanation for it?
Yehuda
You forgot to start your comment with "in my uneducated opinion...". Sounds a little more modest, no 🙂
It might also be worth noting, at least as far as I know, that the vast majority of astrophysicists do not think like you. I'm right?
For the hundredth time: there is no dark matter. The reason is very simple. When there is a discrepancy between the results measured in the field and the results obtained from a formula, the results measured in the field should be preferred and a formula or other explanation should be sought accordingly. What is being done here is preferring Newton's and/or Einstein's "holy" gravitation formula and forcefully changing the data measured in the field with something delusional called "mass and dark energies". After eighty years of searching for the aforementioned illusory substance, the time has come for us to start looking for another explanation instead of the "holy" formula, and believe me the explanation is not complicated. Please respond gently.
If they are sterile, then how can they be part of the elusive dark matter, which is apparently widespread throughout the universe and exerts a gravitational force on normal matter?