DIS07 Munich April 2007 THE COCKCROFT INSTITUTE of ACCELERATOR SCIENCE and TECHNOLOGY LHeC 1.Why 2.How 3. When 4. Summary John Dainton Cockcroft Institute and Univ Liverpool, Daresbury Science and Innovation Campus, GB and the University of Liverpool, GB with M Klein (Univ Liverpool) P Newman (Univ Birmingham), E Perez (CERN) F Willeke (DESY Hamburg and BNL) and more and more …… ! hep-ex/0603016, JINST 1 (2006) P10001, and DIS06 Proceedings
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THE COCKCROFT INSTITUTE of ACCELERATOR SCIENCE and TECHNOLOGY DIS07 Munich April 2007 LHeC 1.Why 2.How 3. When 4. Summary John Dainton Cockcroft Institute.
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DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGYLHeCLHeC
1. Why2. How3. When4. Summary
John DaintonCockcroft Institute and Univ Liverpool,
Daresbury Science and Innovation Campus, GBand the University of Liverpool, GB
with M Klein (Univ Liverpool)P Newman (Univ Birmingham),
E Perez (CERN)F Willeke (DESY Hamburg and BNL)
and more and more …… !
hep-ex/0603016, JINST 1 (2006) P10001, and DIS06 Proceedings
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
1.Why?1.Why?
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Why: Leptons Quarks ?Why: Leptons Quarks ?
•how are leptons and quarks related ?
•put them together at the highest energyat finest detail
ICHEP86 Berkeley
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
TeV eq Kinematic Reach
TeV eq Kinematic Reach
space-like >TeV
seq >TeV
3×10-7
-Q2 ≤ 30,000 GeV2
-seq ≤ (300 GeV)2
in ~ 0.7 am
●2007: HERA
-Q2 ≤ 2×106 GeV2
-seq ≤ (2000 GeV)2
in ~ 0.1 am !
●≥2016?: LHeC
LHeC
e RL?
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Lepton+quark @ TeVLepton+quark @ TeV
LHC LHeC
SM (hadronic) + signal
LqLq productionS
~ few × 0.1 fb (Λ=0.1)
SM (electroweak) + signal
Lq formation
~ 100 fb (Λ=0.1)
●leptoquark systems – new physics +SM
Re + resonance
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Lepton+quark @ TeVLepton+quark @ TeV
●leptoquark systems – new physics +SM
1 TeV
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
e,
q
e+ F=0e- F=2
qq g Lq Lq
productionmechanism ?
disentangle massspectrum ?
e q
e
q
*
LHC Lq pairs LHeC Lq formation+decay
fermionnumber
e+
e-
q or q ?_
q or q ?_
_ _
Lepton+quark @ TeVLepton+quark @ TeV
spinparityand
chirality
defined formation (eLR) precision BRs (NC CC)
inclusive coherence
unique PWA
SM + signal + interference
expl sig jets + leptons jet+(lepton)+pT (im)balance
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
e,
q
e+ F=0e- F=2
gq Lq l
productionmechanism ?
disentangle massspectrum ?
e q
e
q
*
LHC Lq LHeC Lq formation+decay
fermionnumber
_
Lepton+quark @ TeVLepton+quark @ TeV
spinparityand
chirality
defined formation (eLR) precision BRs (NC CC)
inclusive coherence
unique PWA
SM + signal + interference
expl sig jet + leptons jet+(lepton)+pT (im)balance
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Chadwick
Cambridge
nu
cle
us
nu
cle
on
qu
ark
NC
+C
C+
glu
on
●LHeC
g+
EW
?
●unique chiral probe @ 0.0001 fm ?
●
pro
ton
s+
neu
tron
s
Manchester
SLAC
●70 7000 GeV e± p cm energy 1400 GeV
SM + new Lq physics@ ~ 0.0001 fm ?SM + new Lq physics@ ~ 0.0001 fm ?
Lepton+quark @ TeVLepton+quark @ TeVStructure of Matter @ TeVStructure of Matter @ TeV
SM + q structure@ ~ 0.0001 fm ?SM + q structure@ ~ 0.0001 fm ?
Z W
e
RL
?
Q2 y
x
ee
QCD
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
● precision discoveryprobe new chromodynamic physics – beyond SM ?
●short distance structure of SM+
- 2006 @ 10-9
- 2006 GF @ 10-5
- 2006 G @ 0.1%
- 2006 S @ 1-2%
- LHeC + detector S few/mil
•precision QCD at highest energy
Unification ?Unification ?
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
●LHeC
Chadwick
Cambridge
nu
cle
us
nu
cle
on
qu
ark
NC
+C
C+
glu
on
g+
EW
●
pro
ton
s+
neu
tron
s
Manchester
SLAC
?
●unique chiral probe @ 0.0001 fm ?●70 7000 GeV e± p cm energy 1400 GeV
SM + new Lq physics@ ~ 0.0001 fm ?SM + new Lq physics@ ~ 0.0001 fm ?
Lepton+quark @ TeVLepton+quark @ TeVHeavy Flavour in HadronChromodynamics
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
what we haveto find
●Higgs at LHC what weknownow
Heavy Flavour in HadronChromodynamics ……
Heavy Flavour in HadronChromodynamics ……
what wecouldknow
…… underpins discovery…… underpins discovery
X=?
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Why: Dense Colour ?Why: Dense Colour ?
•the origin of mass in the Universe
•probe hadronic matter at highest parton densityat lowest Bjørken-x
"Most of the mass of ordinary matter is concentrated in protons and neutrons. It arises from …[a]… profound, and beautiful, source.
Numerical simulation of QCD shows that if we built protons and neutrons in an imaginary world with no Higgs mechanism - purely out of quarks and gluons with zero mass - their masses would not be very different from what they actually are. Their mass arises from pure energy, associated with the dynamics of confinement in QCD, according to the relation m=E/c2. This profound account of the origin of mass is a crown jewel in our Theory of Matter.’’
Frank Wilcek CERN October 11, 2000
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
-xBj ≥ 5×10-5-xBj ≥ 5×10-7
TeV eq Kinematic Reach
TeV eq Kinematic Reach
space-like >TeV
seq >TeV
-Q2 ≥ 1 GeV2
●2007: HERA
LHeC
x
Q2 y
ee
-Q2 ≥ 1 GeV2
●≥2016?: LHeC
Growing Field Energy Density
Growing Field Energy Density
3×10-7
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Growing Field Energy Density
Growing Field Energy Density
●≥2016?: LHeC
-xBj ≥ 5×10-7
Gluon recombinationGluon recombination
x
Q2 y
ee
low x large nuclei
-Q2 ≥ 1 GeV2
•Q2 size of gluons
•xBj phase space for gluons
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Gluon recombination @ LHeC
Gluon recombination @ LHeC
●ep saturation Q2 ≤ 5 GeV2
eA saturation Q2 ≤ 20 GeV2
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
DGLAP
Dense Chromodynamics
Dense Chromodynamics
●low-x rise of F2
- LHeC: precision eg x > 3×10-3 @ Q2=10000 GeV2
x =βxIP
● low x P physics QCD reggeon calculus ?
I
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
2.How?2.How?
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
Proton beamProton beam
●”standard” LHC protons
protons
antiprotons
protons
Np
εpN
… with electrons?
protonselectrons?
DIS07MunichApril 2007
THE COCKCROFT INSTITUTE ofACCELERATOR SCIENCE and TECHNOLOGY
ep Luminosityep Luminosity
●few 10s GeV electrons (LEP = 70 GeV!) ●RF power = 50 MW = 0.86 LEP = 28% CERN site