Longevity and Highest-Energy Cosmic Rays

نویسندگان

  • Paul H. Frampton
  • Bettina Keszthelyi
  • Jack Ng
چکیده

It is proposed that the highest energy ∼ 1020eV cosmic ray primaries are protons, decay products of a long-lived progenitor which has propagated from typically ∼ 100Mpc. Such a scenario can occur in e.g. SU(15) grand unification and in some preon models, but is more generic; if true, these unusual cosmic rays provide a window into new physics. Typeset using REVTEX

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

High-energy Neutrinos from Cosmic Rays

We introduce neutrino astronomy from the observational fact that Nature accelerates protons and photons to energies in excess of 10 and 10 eV, respectively. Although the discovery of cosmic rays dates back close to a century, we do not know how and where they are accelerated. We review the facts as well as the speculations about the sources. Among these gamma ray bursts and active galaxies repr...

متن کامل

Are Extragalactic Gamma Ray Bursts The Source Of The Highest Energy Cosmic Rays?

Recent observations with the large air shower arrays of ultra high energy cosmic rays (UHECR) and recent measurements/estimates of the redshifts of gamma ray bursts (GRBs) seem to rule out extragalactic GRBs as the source of the cosmic rays that are observed near Earth, including those with the highest energies. Subject headings: cosmic rays; gamma rays bursts

متن کامل

High-energy Neutrino Astronomy: Science and First Results

We introduce neutrino astronomy starting from the observational fact that Nature accelerates protons and photons to energies in excess of 10 and 10 eV, respectively. Although the discovery of cosmic rays dates back a century, we do not know how and where they are accelerated. We review the observations as well as speculations about the sources. Among these gamma ray bursts and active galaxies r...

متن کامل

Astrophysics at the Highest Energy Frontiers

I discuss recent advances being made in the physics and astrophysics of cosmic rays and cosmic γ-rays at the highest observed energies as well as the related physics and astrophysics of very high energy cosmic neutrinos. I also discuss the connections between these topics.

متن کامل

A study on the lateral distribution of Cherenkov light in extensive air showers

The dependence of the lateral distribution of Cherenkov light in simulated extensive air showers to the energy and the mass of the primary cosmic rays has been studied. It has been shown that a previous claim about mass independent proportionality of shower energy to the total Cherenkov photon number is not valid in energies below EEAS ~ 1014 eV. We have found that the core distance of the so c...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1997