As for the reason why the rubber ball is difficult to detect.

This is because gluons have color charges and can form a bound state through strong nuclear forces interaction.

Then the rubber balls are always produced together with other ordinary meson binding states.

This is caused, and it is difficult to detect in experiments.

As the experiment ended, Friedman's eyes were also hesitant.

After a while, he began to arrange some people to go to have a meal and rest first, while the other people set out to collect experimental data and examples.

Madshen and Coyle both left, but Chen Zhou volunteered to stay.

Sometimes, the opportunity lies in your own struggle.

Chen Zhou would never want to wait for time to pass if he could get first-hand information.

Friedman naturally agreed to Chen Zhou's request.

He still has some expectations for Chen Zhou.

Moreover, he himself is planning to hand over a copy of the experimental data for this time to Chen Zhou.

Friedman was considering more than just Chen Zhou's mathematical ability.

More importantly, he discovered Chen Zhou's powerful data processing capabilities from Chen Zhou's two physics papers.

and the accuracy of the direction of the experiment.

If they can perform in this experiment, maybe the rubber balls they have been looking for will have a place.

Of course, this is just a beautiful expectation of Friedman.

He could not, nor would he put all the treasure on Chen Zhou.

No matter what, Chen Zhou still feels that he lacks some experience and theoretical knowledge.

Chen Zhou naturally wouldn't know that Friedman had considered so much.

In his eyes, there are only today's experimental data.

Chen Zhou finally felt that he had officially entered the field of high-energy physics.

Although Chen Zhou followed Dean Yang to do the topic of particle accelerator when he was at Yan University.

Including his own graduation thesis, it is also about optimizing diode design.

But those, in Chen Zhou's opinion, are still not tall enough.

And this kind of topic of finding rubber balls is truly high-end and interesting.

The key is that this is a Nobel Prize-level project!

In addition, the gluons, kiwi mesons, Yang Mills theory, standard model involved are all well-known!

At the same time, Chen Zhou also found that his expectation, curiosity and excitement for such a topic were also ignited.

Together with the staff under him, Chen Zhou worked hard until one pm before collecting the experimental data.

Although I only ate a little breakfast, Chen Zhou didn't feel hungry at all.

Instead, he now wants to run back to the hotel and analyze the data.

Friedman also brought McShen and others to the control room again.

After confirming with the person in charge of the collection of experimental data, Friedman decided to hold a seminar at 3:00 pm.

Assign follow-up work and set out to arrange the next experiment.

Before this, Chen Zhou could only follow the staff who collected experimental data and reluctantly went to have lunch.

The meeting started on time at 3 pm.

Originally, Chen Zhou's identity was just an assistant researcher and was not qualified to appear at this conference.

But because of Friedman's arrangement, Chen Zhou and Mathieson Coyle both appeared at the meeting.

Even if it's just a seat to listen.

Chen Zhou also realized that the energy of the Nobel Prize boss is indeed not something to be covered.

At the beginning of the meeting, Friedman asked someone to carry a whiteboard.

A picture was drawn on it.

This picture is nothing else, but is a process that may be rich in rubber spheres, that is, the radiation decay process of charm quark meson j/ψ(c▔c) particles.

This is also what the particle physics community believes is the most promising process to find rubber balls.

The name of this picture is Feynman's picture.

Chen Zhou recognized this impressive picture at a glance.

He has seen this picture more than once in the information given by Friedman.

Moreover, Friedman has much more comments on this picture than anything else.

Then, knowledge related to Feynmantu emerged in Chen Zhou's mind.

The width of j/ψ is very narrow, and its mass is below the threshold for generation of d▔d meon pairs.

Therefore, it cannot decay to d▔d.

In most cases, it decays to light meson through the ozi-depressed tripon process.

At the same time, it can radiate a photon γ first, and then decay into particles m1, m2 through the gluon (g) process...

This is the process represented by the Feynman diagram.

In radiation decay, glons can self-interact and must form glucospheres.

Of course, if the rubber ball really exists.

In addition to the process shown in the Feynman diagram, there are other processes that may be rich in rubber balls.

Such as the hasten-haleton scattering process, the proton-anti-proton annihilation process, etc.

But this time the Slac Pep device is selected as the Feynman diagram process.

Thinking of this, Chen Zhou suddenly felt that China's research in this area.

In fact, it is from the world's leading level.

If Chen Zhou was thinking if, if he could not find rubber balls during his time at MIT.

After returning to China, Yanjing Positive and Negative Electronic Collider Bepc2 and research spectrometer Bes3 would have great appeal to him.

He is also likely to stay at the Yanjing Spectrometer International Cooperation Group for a while.

Of course, these premises are based on the fruitlessness after a period of time.

Friedman began to tell his thoughts at Friedmantu.

As he listened, Chen Zhou couldn't help but feel that Friedman was no longer limited to the Feynman picture in front of him.

Friedman introduced more thought.

Chen Zhou secretly praised that he deserved the Nobel Prize in Physics for his "deep inelastic dispersion of nuclear nucleons".

Those seemingly unintentional connections, after he said this, were instantly fascinating.

In fact, experimental physicists use experiments to explore processes that may be rich in rubber balls.

Many new particles have been discovered as possible candidates for rubber balls.

The quantum numbers of these particles include 0-, 0, 2, etc.

However, the nature of these possible candidates for rubber balls is very difficult to understand.

Some particles are not only candidates for rubber balls, but may also be molecular states, polyquark states, or ordinary mesons.

For example, a0(980) and f0(980) that were once discovered.

But what is exciting and confusing is that in the range of theoretical predictions.

More than one candidate has been found.

It is just considered by some people that the most promising state is in zero.

Possible candidates are: f0(500), f0(980), f0(1370), f0(1500), f0(1700)...

Different people have different opinions on who is the real rubber ball.

Different opinions include those who agree and those who object.

There is no way, theoretical predictions only give the approximate interval of mass.

However, there is no unified conclusion on the other properties of the rubber ball.

This is also one of the reasons why it is difficult to test which one is the real rubber ball in experiments.

It is also the problem that Chen Zhou and the others are facing now.

Glueballs are a basic prediction of quantum chromodynamics.

But even such a basic prediction, after searching for more than half a century, still cannot reach a final conclusion.

Does the rubber ball really exist?

Who is the real rubber ball?

None of these answers.

It is precisely because none of these answers.

Only then did Chen Zhou hear Friedman's story and fascinate him.

In addition to Friedmantu’s process, Friedman gave a lot of ideas and thoughts.

For how to find real glue balls from the data.
Chapter completed!