1. Cosmophysics Group KEK Theory Center 10-12 Nov. 2009
HEAP2009
High Energy Astrophysics 2009
- Cosmic Particles, Jets and Accelerator Science -
Let’s start Hight Energy Astrophysics 2009 HEAP2009.
This is an opening address on behalf of the cosmophysics group, KEK theory center.
Cosmophysics Group KEK Theory Center Nov. 2009

2. High Energy Astrophysics
A broad subject – stars, galaxies, BHs, etc.
Cosmic Ray
Cosmic Jet
AGN
Microquasar
High Energy Astrophysics is a broad subject, dealing with the physics of the universe, such as stars, galaxies, interstellar medium, black holes as well as their interactions.
In particular, one of the most fundamental problems in high energy astrophysics is the origin of cosmic particles and jets.
These issues provide the scientific bottom lines for astrophysical researches.
Pulsar
GRB
Bottom Line Science

3. Crossover Discipline Fermi satellite PAMELA satellite
Positron
High energy astrophysics is now a crossover discipline tying the diverse fields of particle physics, astrophysics and cosmology.
The recently launched Fermi Gamma-ray Space Telescope has already detected numerous objects at GeV energies.
Possible excesses of cosmic-ray electrons and positrons, recently indicated by PAMELA and ATIC/PPB-BETS, also connect dark matter physics and astrophysics.
Gamma
⇒ Particle Physics

4. Multi-Messenger Era TeV Gamma UHE Cosmic Ray Auger, HiRes, TA ⇒ EUSO
In the TeV gamma-ray sky, ground-based telescopes (HESS/MAGIC/VERITAS/MILAGRO) have successfully made
many new discoveries, leading to dedicated plans for next-generation facilities (CTA/AGIS/HAWC).
We are also witnessing the dawn of a new era of multi-messenger astronomy,
utilizing not only photons but also other particles, such as UHE cosmic-rays observed by Auger.
Auger, HiRes, TA
⇒ EUSO
GZK cutoff?
Anisotropy?
Composition?
HESS, MAGIC,
CANG. ⇒ CTA

5. Upcoming New Windows High Energy n Gravitational Wave
Particle,
Hadron &
Gravity
New windows to the universe is also almost opening through the high energy neutrino as well as gravitational wave channels.
LIGO, Virgo, GEO,
LCGT, AIGO, LISA,
DECIGO/BBO
IceCube, ANTARES

6. Accelerator Laboratory
LSST
IceCube
Fermi
JDEM
Auger
JDEM
In these interdisciplinary fields, the role of accelerator laboratories are becoming ever more important,
both technologically and scientifically.
This is exemplified by the Fermi experiment led by SLAC.
Other laboratories in the world are also get involved in this direction.
SDSS
CAST
DES

7. Energy Frontier Cosmic accelerator could expand the energy frontier?
Center-of-Mass Energy
Man-made accelerator
is already saturating
(top)
(W±,Z)
(Nn=3)
(gluon)
Cosmic accelerator
could expand the
energy frontier?
This trend is expected to intensify along with future increases in energy scale and project size.
In view of the difficulties in advancing the energy frontier in terrestrial experiments,
we may have to diversify to survive the scientific desert.
(J/y, t)
Year

8. KEK for Cosmophysics? The time is ripe to consider how KEK
KEK’s Roadmap (5 yr): J-PARC & KEKB upgrade
KEK seems to have avoided non-accelerator science,
partly because of a law against it.
CMB
Cosmo-
physics
Group
BESS
Currently KEK puts the first priority on J-PARC experiments and the KEKB upgrade.
Of course, the accelerator physics will remain the main purpose of this laboratory.
But it seems to me that KEK has avoided non-accelerator science,
partly because of a law against it.
Only three years ago there was only BESS group for the cosmophysics science.
But now we have also the CMB group and our theory group.
Thus, the time is ripe to seriously consider how KEK can commit itself in this direction,
including the iniation of large cosmophysics projects on a 10-year time scale.
~2 yr old
~2 yr old
The time is ripe to consider how KEK
can commit itself in this direction

9. Aim of the workshop To discuss the latest observational and
theoretical developments,
e.g., Fermi & PAMELA results
To exchange ideas on some of the most
fundamental problems,
e.g., origin of cosmic particles and jets
and the nature of dark matter
To address the future of accelerator lab.
(not politically but scientifically)

10. Acknowledgement Many thanks for coming to this workshop.
Apology for the late starting of the workshop organization. (It was only ~3 months ago…)
- Please enjoy the workshop and autumn leaves!
Tsukuba Mountain