Referat and Exam of Stukov Danila

[Danila_Stukov_MEPHI]

Hello!
The name of my referat is mirror world with "mn<mp-me".

[Maxim Khlopov]

Dear Danila,
Thank you and I wait for the first draft
With the best regards
M.Yu.Khlopov

[Danila_Stukov_MEPHI]

Hello, i am sorry for sending my first draft this late, but i had to double check everything. I am still not sure how to translate the title page however.

[Maxim Khlopov]

Dear Danila,
My comments are in the attched file
With the best regards
M.Yu.Khlopov

[Danila_Stukov_MEPHI]

Hello, this is the second version of my thesis.

I have some questions however.
I don't fully understand what kind of additional assumptions i should make in Inflation and baryosynthesis sections and that last part about dark matter, i'm not sure how to make it follow from my model, could you please explain it?
Another question is about brown dwarfs, are they good enough candidates for dark matter, specifically if they are mirror stars? I've read somewhere that dark matter constituents are expected to be very small but star is not exactly a small object.

[Maxim Khlopov]

I don't fully understand what kind of additional assumptions i should make in Inflation and baryosynthesis sections and that last part about dark matter, i'm not sure how to make it follow from my model, could you please explain it?
If you want to describe cosmological evolution and your model doesn't explain inflation and baryosynthesis, you should make some assumptions about the results of these processes, which are not described by your model
Another question is about brown dwarfs, are they good enough candidates for dark matter, specifically if they are mirror stars? I've read somewhere that dark matter constituents are expected to be very small but star is not exactly a small object.
Search for MACHOs puts constraint on the possible contribution of compact objects (like brown dwarfs or mirros stars) in the halo of Galaxy - these the objects cannot be more than 20% of total dark matter of the Galaxy.
Regards
M.Yu.Khlopov

[Danila_Stukov_MEPHI]

Hello, i've made some additional changes in my thesis.

[Maxim Khlopov]

Dear Nikita,
I found with regret the same errrors, which I have proposed to correct in the previous version.
My comments should not be inserted as they are - they only gave a hint for the correct statements.
The course is called: Introduction into Cosmoparticle physics.
Please be more attantive to my comments
Regards
M.Yu.Khlopov

[Maxim Khlopov]

Dear Danila,
The main point of your model is that heavy nuclei (an may be even light) are unstable, so chemistry of your mirror world will be very different from the case of the ordinary matter.
Please, use semi-empirical Weizsaecker’s formula to compare binding energies of He-4 and 4n (tetra-neutron) in your model and of D and 2n, to check that D and He are stable relative to decay to pure neutron states.
Regards
M.Yu.Khlopov

[Danila_Stukov_MEPHI]

Hello, i've made som additional adjustments to my text.
As for latest question, i've ecountered same problems as Denis and i am not sure the formula works correctly for light nuclei.
The numbers are:
E(D)~-8 (which is obviously incorrect)
E(2n)~4.7
For He4 it seems to work better, i got more or less satisfactory binding energy for it.
E(4n)~2.7
E(He4)~24.6