Upload
lev-abbott
View
53
Download
1
Embed Size (px)
DESCRIPTION
Muon Collaboration. Muon Collaboration Meeting. WELCOME. Steve Geer Collaboration Meeting, 14-17 Feb, 2005. Muon Collaboration. 2. Meeting Focus. Broad review of the status of our R&D and our progress over the last year. - PowerPoint PPT Presentation
Citation preview
Muon CollaborationMeeting
Steve Geer Collaboration Meeting, 14-17 Feb, 2005
Muon Collaboration
WELCOME
Meeting FocusMuon Collaboration
Broad review of the status of our R&D and our progress over the last year.
Opportunity to discuss our plans for this year and beyond.
2
Muon Collaboration GoalsMuon Collaboration
“To study and develop the theoretical tools and the software simulation tools, and to carry out R&D on the unique hardware,
required for the design of Neutrino Factories and Muon Colliders.”
The collaboration is governed by a charter which defines itsgoals and organization. The goals are defined :-
3
Evolution of Physics MotivationMuon Collaboration
Muon Collider: Physics case as strong as it ever was.
Neutrino Factory: Physics case as strong or strongerthan it ever was.
NOTE: Neutrino physics is a very hot topic, and neutrino factories are seen as the ultimate tool for neutrino physics there is a strong case for our R&D.
4
Neutrinos are Everywhere 5
Neutrinos outnumber ordinary matter particles in the Universe (electrons, protons, neutrons) by a factor of ten billion.
Depending on their masses they may account for a few % of the unknown “dark matter” in the Universe
Neutrinos are important for stellar processes: ~71010 cm-2s-1 stream through the Earth from the sun. Neutrinos also govern Supernovae dynamics, and hence heavy element production.
If there is CP Violation in the neutrino sector, then neutrino physics might ultimately be responsible for Baryogenesis.
To understand the nature of the Universe in which we live we must understand the properties of the neutrino.
Neutrinos Oscillations are Exciting 6
The Standard Model needs modification accommodate neutrino mass terms, which require either the existence of right-handed neutrinos Dirac mass terms, or a violation of lepton number conservation Majorana mass terms. The physics of neutrino masses & mixings is physics beyond the Standard Model
Neutrinos have nonzero masses and mixings !
This is exciting because:
We don’t know the neutrino mass spectrum but we do know that neutrino masses & mass splittings are tiny compared to the masses of the other fundamental fermions. This suggests radically new physics, which perhaps originates at the GUT or Planck Scale, or indicates the existence of new spatial dimensions, or …..
Neutrino Measurements Drive Theoretical Ideas 7
Although we don’t have complete knowledge of the neutrino mixing matrix, we do know it is qualitatively very different from the quark mixing matrix. This necessarily constrains theoretical ideas about the underlying relationship between quarks and leptons.
Over the last few years knowledge of neutrino oscillation parametershas eliminated a previous generation of GUT models, leading to a newset of models designed to accommodate the data.
Further oscillation measurements will necessarily reject the majorityof the new models, and hopefully lead to new ideas about physics beyond the Standard Model
Neutrino Oscillation Measurements Drive Theoretical Ideas. This is expected to continue to be the case throughout the Proton Driver era.
Neutrino Mixing 8
Within the framework of 3-flavor mixing, the 3 known flavor eigenstates (e, ,
) are related to 3 neutrino mass eigenstates (1, 2, 3) :
= (33)e
( ) 1
( )We know that UMNS is very different from the CKM Matrix
large large small/tiny/0 ?large large largelarge large large( )
~1 small tinysmall ~1 tiny tiny tiny ~1( )
Neutrino Mixing Matrix 9
In analogy with the CKM matrix, UMNS can be parameterized using
3 mixing angles (12 , 23 , 13 ) and one complex phase () :
C12C23 S12C13 S13 e-i
-S12C23 C12C23 S23C13
-C12S23 S13 ei -S12C23 S13 ei
S12S23 -C12S23 C23C13
-C12C23 S13 ei -S12C23 S13 ei
( )We do not know the values of 13 or the CP phase . If 13 and are
non-zero, there will be CP Violation in the neutrino sector.
Neutrino Mass Spectrum 10
m2sol = 8 x 10–5 eV2, |m2
atm| = 2.5 x 10–3 eV2~ ~
Mass
1
2
3
or
1
23
}m2sol
m2atm
}m2sol
m2atm
Normal Inverted
The oscillations are driven by the mass splittings: m2ij m2
i - m2j
Neutrino MeasurementsFor the moment, set aside the LSND result. From the solar-, atmospheric-, and reactor-neutrino data we already know a lot about the mixing matrix and mass splittings:
… but note that we have only an upper limit on 13, and know
nothing about We need to search for e oscillations !
Solar Neutrinos Atmos. Neutrinos e not seen
11
Steve Geer MC Collaboration Meeting Jan 2004
12
Muon Collaboration Physics Sensitivity
sin2213
Fra
ctio
n of
-s
pace
CP Violation (3)MassHierarchy(95% CL)
0.1 0.10.01 0.010.001 0.001
Steve Geer MC Collaboration Meeting Jan 2004
13
Muon Collaboration
In the last year our collaboration been very
active …
MEETINGS: NUFACT04 – NUFACT05
Muon Collaboration
Steve Geer MC Collaboration Meeting Jan 2004
15
Muon Collaboration Our R&D Program is becoming increasingly International
1. MICE has scientific approval and some funding
2. Targetry experiment at CERN is (almost) approved
3. FFAG ring studies and planning for a future international demonstration experiment proceeding
4. NUFACT meetings remain healthy (see you at Frascati , June 21-26 !)
Steve Geer MC Collaboration Meeting Jan 2004
16
Muon Collaboration Funding is tight but ...
1. We had a strong MUTAC review April last year:
2. Our base FY04 MC funding level (wrt FY03) was flat, but we succeeded in getting some supplementary funds.
3. In FY05 the base MC DOE funding is up 300K$ (earmarked for MICE).
Steve Geer MC Collaboration Meeting Jan 2004
17
Muon Collaboration … Ups and Downs …
1. NSF 3-year funding ended & no renewed funding for this yet
2. 100K$ x 3 years (=300K$) new NSF funding for MICE
3. ICAR funding ended
4. Muons Inc funding increased
Steve Geer MC Collaboration Meeting Jan 2004
18
Muon Collaboration FY06 DOE Budget Request
Significant Program Shifts
Room for guarded optimisim
Steve Geer MC Collaboration Meeting Jan 2004
19
Muon Collaboration MCOG Request
MCOG wants to make sure that, given realistic funding levels,our plans match available resources, and goals are clear.
MCOG has requested a 5-year “strategic” plan, assuming flat funding. We can also produce a more optimistic plan based on an increased funding scenario (but should assume no more than a factor of 2, say, increase).
Our strategic plan should be ready before our next MUTACreview (May this year ?) … this MC meeting is our opportunity to discuss the big picture as a Collaboration … as we step towards our updated plan.
AGENDA - 1Muon Collaboration
AGENDA - 2Muon Collaboration
AGENDA - 3Muon Collaboration
AGENDA - 4Muon Collaboration
AGENDA - 5Muon Collaboration
Steve Geer MC Collaboration Meeting Jan 2004
25
Muon Collaboration … HENCE
The agenda is full … so lets get started !