Positive-Energy Dirac Particles and Dark Matter

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The paper reviews an old idea by Dirac and proposes it could be relevant for dark matter. In my opinion this unusual idea is interesting enough to deserve publication.

 

The paper could be expanded by studying if the Dirac system, that cannot have gauge interactions, can have other interactions that might lead to its decay.

 

The paper does not discuss recent works on ideas possibly related to the Dirac system

 

 

Comments on the Quality of English Language

An improvement of grammar is needed.

For example there are missing "the" at lines 85, 165;

"on" should be replaced by "in" at line 168; 

"extend by "extent" at line 230;

"consecutively" by "consequently" at line 322.

Author Response

Pleaase see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

This is a very interesting paper, where an old idea originated as early as in 1971 is reconsidered and applied to some problems of the modern physics. Dirac particles cannot interact with the electromagnetic field and for this reason can be considered as a valid candidate for dark matter constituents.

The paper is clearly written and can be interesting to a wide audience.

I recommend it for the publication.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

In this paper the author proposes that Dirac particles are natural candidates for dark matter due to their non interaction with electromagnetic fields. This is an interesting and valid proposition, but to my knowledge there has been similar claims in the literature, which are not even mentioned in this article. The author should make a reference to these papers and discuss the main contributions of the present work. 

Comments on the Quality of English Language

Moderate editing of the text is required. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

Comments and Suggestions for Authors

There are various Dirac dark matter models in the literature based on "Dirac particles". Although these may not be the same Dirac particles referred to in this paper, the author would still need to summarize these and explain clearly how his model differs from these models. This would make the paper more complete. 

Comments on the Quality of English Language

Minor editing of the text is required. 

Author Response

Please, see an attachment

Author Response File: Author Response.pdf