Astroparticle Physics Forum COSMOVIA

Максим Юрьевич,
прикрепляю обновленную версию.
С уважением,
Д. Пугачев.

Dear Dmitry,
You have started to late to consider all the interesting features of your model.
So to come to some logical end, let's consider correctly a simle case of charge symmetric mirror world.
You should accurately check, what is the abundance of nucleon-antinucleon pairs (electron-positron-pairs) in this case and study, whether processes of nucleosythesis, recombination and gravitation instability can take place in such scenario. What kind of dark matter objects can be formed (or not) in your scenario?
My comments are in the attached file
Regards
M.Yu.Khlopov

Максим Юрьевич, прикрепляю новую версию.
С уважением,
Д. Пугачёв

You have charge symmetric case: equal number of mirror nucleons and antinucleons.
Please, consider freezing out of nucleon pairs, calculate their frozen our abundance and come to conclusions about nucleosynthesis, recombination and gravitational instability for baryon symmetric mirror world.
This comment is in the attached file

Оценка, которую я провел в версии 5, неправильная?
Получил, что скорость реакции образования дейтерия практически равна темпу расширения Вселенной. Из этого можно сделать вывод, что нуклеосинтез в зеркальном мире не будет происходить.

You don't give the value of n_b, which should be determined from freezing out of nucleon-antinucleon pairs in baryon symmetric mirror world

В конце раздела "Закалка частиц" приведено данное значение

Pleaqe check it, taking into account that nucleon freezing out is determined by strong interaction

Я пересчитал закаленную концентрацию нуклонов. При новом значении процесс нуклеосинтеза будет иметь место. Поясните, пожалуйста, как, опираясь на заколенное значение нуклонов, можно сделать заключение о рекомбинации и гравитационной нейустойчивости в барионно-симметрочном зеркальном мире.

Dear Dmitry,
My guess is that taking into account strong cross section for nucleon-antinucleon annihilation (and for charged pions annihilation to neutral pion pairs) your frozen our concentration will be so small that the rate of nuclear reactions and of recombination (for which you should also calculate frozen out concentration for mirror electron-positron pairs) will be much smaller, than the rate of expansion in the corresponding periods, as well as their contribution into the total density will be not sufficient to provide matter dominated stage and development of gravitational instability (growth of small density fulctuations)
We have no time to continue work on your text, soi you are admitted to exam, provided that you prepare these calculations as addtional questions to your ticket.
Regards
M.Yu.Khlopov