For those interested in the link between LENR and Ultra Dense Hydrogen (UDH), I made a selection of scientific articles that deal with this subject. This selection does not aim to be exhaustive, nor objective. Current version (August 2017) contains 77 articles that I selected among hundreds that I read on the subject. It starts with the work of Barut in the 1970's who predicted a bound state at the Compton scale with magnetic forces playing a key role, continues with the theoretical and experimental discovery of Rydberg Matter in the 1980's by both Manykin and Holmlid, then presents the conjecture first made at the beginning of the 1990's right after Fleischman & Pons that LENR is based on UDH, followed by the experimental evidence of the existence of UDH in the middle of the 2000's, independently by Lipson & Miley and by Holmlid, to end with the seminal work of Holmlid in the 2010's on the characterisation of UDH and notably the fact that UDH may decay in mesons in breaking the conservation of the baryon number.
The so-called Deep Dirac Levels, Compton composites, binuclear atoms, etc... may just be other names of the same physical entity. Therefore I also included the main papers on these subjects. Note that I didn't include any study by Mills for two reasons: first, I find the experimental evidence of the existence of hydrinos to be very weak; second, even if we assume that hydrinos exist, they still largely differ from UDH. Similarly, I didn't include anything on charge clusters and Ken Shoulders' work despite that UDH and charge clusters may actually be the same beast, because I find the charge cluster concept way way less convincing than UDH.
I would appreciate if this thread could stay on the topic UDH and LENR. I plan to keep the spreadsheet up-to-date with any new evidence on the subject, both experimental and theoretical. In particular feel free to chime in if you believe that I missed an important paper on this subject.
PS: XLSX spreadsheet zipped to comply with the forum allowed extensions.