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Wonder-ful final remarks
Roberto Petronzio INFN


wonder
· 1. ­ a. One that arouses awe, astonishment, surprise, or admiration; a marvel: "The decision of one age or country is a wonder to another" (John Stuart Mill). ­ b. The emotion aroused by something awe-inspiring, astounding, or marvelous: gazed with wonder at the northern lights. · 2. An event inexplicable by the laws of nature; a miracle. · 3. A feeling of puzzlement or doubt. · 4. often Wonder A monumental human creation regarded with awe, especially one of seven monuments of the ancient world that appeared on various lists of late antiquity.


A good title for the workshop
· Dark matter came as a surprise, · A strong emotion is associated with the awareness that we seem to know the basic laws of nature but we still miss... what is the universe made of.. · Raises doubts on our understanding of early universe · Its discovery may need a monumental effort · BUT, hopefully it CAN be explained by the laws of nature


Progress on DM
· Evidence from Dama/Lybra ... CDMS, Cogent ... and from indirect searches (Pamela, Fermi, Atic)
­ A low mass Bino or RH sneutrino ??? ­ The LEP limits challenged

· Improvements of upper bounds on wimp-nucleon cross section (Xenon100)
­ the challenge of low-mass wimps

· Spin dependent versus spin independent measurements as an important tool
­ Different cross sections ­ LSP and LKP


Technological developments
· External background
active and passive shielding, pulse analysis

· Internal background
material selection, purification, new photon detectors

· Light yield, energy threshold · 3D reconstruction direction Impressive progress


Many puzzles
· The WHY NOW problem · The dark energy size compared to existing vacuum expectations


Associated (??) puzzles
· Matter antimatter asymmetry · The antineutrino oscillations (LSND) · The sterile neutrinos and/or CP violation


(Too) many candidates
· Susy · Kaluza-Klein and extra dimensions · Axion-like · Right handed neutrinos or sterile neutrinos ... Need for different experimental approaches


DAMA/LIBRA WARP XENON CDMS KIMS COUPP ZEPLIN CoGeNT ...


The LHC challenge
· Do next two years of LHC running complement passive detector based searches ?? · What sizes/technologies make good competition ?? · How does the competition extend to higher energy/luminosity of LHC ?? · Toward a composite strategy, not just a single experiment issue... a wonder


LNGS
· Dark matter and Majorana neutrinos as the main program in the next years · Dark matter:
­ Profit from Warp/Xenon experience ­ Profit from Icarus: the prototype large detector ­ Clarify further Dama results, with additional investments ­ develop complementary options (High A-low A liquid gases..??)


Guide-lines
· · · · Do not trust theory too much Stick to experimental results Do not take anything for granted Do not leave holes around