# Can micro black holes form in the Sun?

Wikipedia writes to say

Factor (J)     SI prefix    Value           Item

10E−7            nJ        5.6×10E−7 J     energy per proton in the CERN Large
Hadron Collider in 2011 (3.5 TeV)
Sun by 1 square meter at the altitude
of Earth's orbit per second (solar
constant)


This leads to the assumption the energy generated at Sol's core is significantly higher.

If this assumption is correct, and the earlier reports in media about creation of micro-black-holes in more powerful avatars of LHC are reasonable, would it be far-fetched to state micro-black-holes may form within a star too?

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You're comparing apples and oranges above--the energy per nucleon in the LHC, to some sort of power per unit area for the sun. To have a meaningful comparison, you need to find the energy per nucleon in the Sun's core. – Jerry Schirmer Sep 13 '13 at 17:30
@JerrySchirmer: The question was mostly off the top of my head. Any suggestions on a ready reference? I'm only a curious layman with limited knowledge of high math/physics and might take aeons to comprehend technical stuff (+: – Everyone Sep 13 '13 at 17:37
The core of the sun is really hot, but it is still quite a low energy regime by particle physics standards. – dmckee Sep 13 '13 at 18:32

This leads to the assumption the energy generated at Sol's core is significantly higher.

High energy interactions of particles implied in the phenomenological models of the creation of micro black holes are a function of the energy of the individual particles .

Individual particles are accelerated to the TeV energies of the LHC, each single proton. In the sun the average energy of individual particles is very low, in the nuclear regime, which is about a million times lower than a TeV.

If this assumption is correct, and the earlier reports in media about creation of micro-black-holes in more powerful avatars of LHC are reasonable, would it be far-fetched to state micro-black-holes may form within a star too?

The assumption is not correct because it confuses the total luminosity per square meter coming from the sun with the energy of the individual particles which compose this radiance. In this lecture the reactions that generate the luminosity of the sun are calculated, and give 27 MeV on average for the particles available for further interactions particle on particle. Everything starts with hydrogen on hydrogen.

So except for the energy given to the neutrinos, which exit the star without depositing any energy, the 27 MeV is available to provide the solar luminosity.

This is too low for any phenomenological model of micro black holes by a million in order of magnitude.

There do exist higher energy particles coming from the corona of the sun accelerated by the magnetic fields, the tail end even in GeV and are part of the cosmic radiation environment around earth, but still the energy is very low.

Cosmic rays are our first and maybe our final laboratory creating high energy particles, but they come from the galaxy and the cosmos. The tail end of their energy distribution has particles with energy immensely greater than the ones we can ever generate on earth.

It was the main argument that refuted the fear mongering assumption that the earth might be in danger of micro black holes created at the LHC! Much higher energy interactions in our atmosphere have not destroyed the earth yet over the billions of years it exists :).

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