Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-01-21
J.Phys.Conf.Ser.120:012001,2008
Astronomy and Astrophysics
Astrophysics
Invited talk at TAUP 2007 conference, September 2007, Sendai, Japan
Scientific paper
10.1088/1742-6596/120/1/012001
Puzzles often give birth to the great discoveries, the false discoveries sometimes stimulate the exiting ideas in theoretical physics. The historical examples of both are described in Introduction and in section ``Cosmological Puzzles''. From existing puzzles most attention is given to Ultra High Energy Cosmic Ray (UHECR) puzzle and to cosmological constant problem. The 40-years old UHECR problem consisted in absence of the sharp steepening in spectrum of extragalactic cosmic rays caused by interaction with CMB radiation. This steepening is known as Greisen-Zatsepin-Kuzmin (GZK) cutoff. It is demonstrated here that the features of interaction of cosmic ray protons with CMB are seen now in the spectrum in the form of the dip and beginning of the GZK cutoff. The most serious cosmological problem is caused by large vacuum energy of the known elementary-particle fields which exceeds at least by 45 orders of magnitude the cosmological vacuum energy. The various ideas put forward to solve this problem during last 40 years, have weaknesses and cannot be accepted as the final solution of this puzzle. The anthropic approach is discussed.
No associations
LandOfFree
Astroparticle Physics: Puzzles and Discoveries does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Astroparticle Physics: Puzzles and Discoveries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Astroparticle Physics: Puzzles and Discoveries will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-593263