EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Electroweak Hadron Physics

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Short History  decay: - effective G F - V-A current E122: Parity Violation in ed DIS, first confirmation of Electroweak SM (1978) sin 2  w = High precision Z-pole measurements + e - beam technology:  weak interactions are a new perturbative probe of hadronic matter

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Weak Interactions & Hadrons Semi-Leptonic: e - scattering Pure hadronic: PV meson-hadron couplings CC beams e - beam? NC Test Electroweak Sector of Standard low E New probe of hadron structure

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay e - Neutral Current Z0Z0 e - (k) Q 2 <<M Z 2 e’ - (k’) q=k-k’ M Z ~ g 2 /M Z 2 M  ~ e 2 /Q 2 e = g sin  w  Can’t access NC via a cross section measurement

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Parity Violation Z0Z0 e-e- e-’e-’   << 1

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Observables from e - NC Z0Z0 e-e- e-’e-’ q V A   V coupling to the lepton: Suppressed by 1 - 4sin 2  W ~ 0 Axial form factor G A (Q 2 ) Anapole moment Only Vector/Axial interference contributes

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Observables from e - NC Z0Z0 e-e- e-’e-’ q V A V coupling to the target dominates:   Weak charge: Q W = f(Z,N, sin 2  W )  Low E tests of SM Q W (Q 2 )  Weak FF ( See K. Paschke’s talk ) Complementary probe (accuracy, kine.)  R n (elastic e-Pb), u/d (PVDIS), …

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Running of sin 2  W E158: Parity violation in e - -e - scattering Atomic parity violation NuTeV: neutrino NC/CC cross sections 3 types of measurements at Q 2 <<M Z 2 : sin 2  W parametrizes all vector weak couplings Loop corrections: sin 2  W  sin 2  W (Q 2 ) 3%

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay SLAC Experiment E158 Detector e 50 GeV Liquid Hydrogen A PV =  -   +  At tree level: In practice: A PV ~1.5 x  (3 + cos  ) sin  2 A PV = 1 4  sin 2  w () m E G F e - scattering   Small but very sensitive

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Experimental Challenges oStatistics integrated rate = 4 GHz e - detected  A = e-p elastic  production radiative inelastic e-p 2  and AT oBackground

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Experimental Challenges  toroid  30 ppm oBeam monitoring & resolution  jitter versus statistics

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Experimental Challenges oBeam systematics  false asymmetries Polarized Source Slow reversals

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay E158 Results A PV (Q 2 =0.026 GeV 2 ) = -131  14 stat  10 syst ppb  LL ~ 10 TeV SO(10) Z’ ~ 900 GeV lepton flavor violating coupling ~ 0.01G F Limits on physics beyond SM (95% CL): Phys.Rev.Lett.95:081601,2005 sin 2  W | exp = ± ± sin 2 θ W | theo = ±

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Running of sin 2  W

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay NuTeV Iron target  Z W

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay NuTeV -hadron neutral current:

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay NuTev Results 3  discrepancy !  New physics or spurious nuclear effect? Sensitivity to many nuclear effects… but no obvious explanation so far NLO Corrections QCD symmetry violations (isospin, sea quarks) … sin 2  W | exp = ± stat ± syst sin 2 θ W | theo = ± Phys. Rev. Lett. 88, (2002) Need more experimental constraints

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Atomic PV  Radiative transition in the weak field of the nucleus (q ~ 1 MeV) A PV = . Q W Atomic structure Weak charge Q W = (2Z+N)C 1u +(2N+Z)C 1d = Z(1-4sin 2  W )-N ~ -N Less sensitive but sub-percent accuracy ! Semi-leptonic sector:

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Z 3 law  Heavy Atoms Control of the atomic structure   Cesium, chain of isotopes Highly suppressed QED transition  Atomic PV = E 1 + M 1 ~ ForbidenSuppressed  A PV ~ E 1 PV / E 1 Stark |ns 1/2 > ~ =|ns 1/2 >+  |np 1/2 > + E 1 PV Induced by external E 0 field Rate  E 0 2 A PV  1/E 0 + E 1 Stark

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Boulder Experiment F=3 F=4 F=3 m=-4 m=-3 m=+3 m=+4 m=-4 m=-3 m=+3 m=+4 6p 3/2 F= D1 D2 D1,D2Laser D3 Signal= flux on photodiode 133 Cs 6s 1/2 7s 1/2 +  6p 1/2  Q W (exp) = ± 0.29 (exp) ± 0.39 (theo) Q W (theo) = ±  agreement

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay - 1 = (4.8 ± 0.7) Boulder Experiment (7  !) Similar e - /vector-nucleon/axial coupling but 5 times bigger Parity violation through internal meson exchange, also measured in PV hadron scattering A PV (6s  7s,  F=-1) A PV (6s  7s,  F=+1) r hf = e-e- pp e-e-  Z0Z0  First measurement of a non-zero nuclear anapole moment

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Running of sin 2  W

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Future Complementary targets Ultra high precision Moller Atomic PV Q p weak (radioactive atoms, isotopes…)

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Qweak   Q QQQ 24 QB G p weak F             A PV Constrained by other PV measurements at higher Q 2 Elastic ep

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Qweak 35cm Liquid Hydrogen Target Collimator with 8 openings θ= 8° ± 2° Region I GEM Detectors Region II Drift Chambers Toroidal Magnet Region III Drift Chambers Scattered e - Eight Fused Silica (quartz) Čerenkov Detectors Luminosity Monitors Beam: E = GeV I = 180 μA P e = 85% Kinematics: Int. Rate = 6.4 GHz = GeV 2 = –0.29 ppm PV in elastic e p  A PV /A PV =2.2%  Q p W /Q p W =4%  sin 2  W =0.0007

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Running of sin 2  W Qweak LC e - e -

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Future Complementary targets Ultra high precision New hadron probe Strange FF, Neutron skin PVDIS Z0Z0 e-e- e-’e-’   p,d, 4 He, 208 Pb Z0Z0 e-e- e-’e-’   p,d

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Neutron Skin F W (Q 2 ) F  (Q 2 ) -N F n (Q 2 ) + (1-4sin 2  W ) Z F p (Q 2 ) Z F p (Q 2 )  e-e- 208 Pb Z0Z0     Born Approximation (  R 2 =R 2 n -R 2 p )  Rn/Rn~1% See R. Michaels’ poster

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Parity Violating DIS f q (x): quark distribution functions Valence Quark distributions at high x C 2q ’s factors Higher twist physics & Charge symmetry breaking Z0Z0 e-e- e-’e-’   p,d Judicious choices of kinematics and targets allow to test:

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay PVDIS on 2 H E122 JLab TeV scale physics Sensitivity to C 2q Higher twist Isospin violation Isoscalar target, most of quark distribution effects cancel out Jlab 6GeV + 12GeV upgrade

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Running of sin 2  W Qweak LC e - e - DIS 12 GeV

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay PVDIS on 1 H Allows d/u measurement on a single nucleon! x  1 SU(6): 1/2 pQCD: 1/5 SU(6) breaking: 0 Complementary to other approaches planned for the 12 GeV upgrade of Jlab: 3 H and 3 He structure function ratio Deuteron structure functions with tagged slow recoiling neutrons

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay High x Measurement Multiple A PV measurements (Q 2, x) with multiple targets Scattered electrons from 3 to 8 GeV “Huge” asymmetries Need large solid angle calorimeter “A4-like”, rates up to a few MHz Toroidal sweeping magnet to reject Low E pions

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Hadrons Weak Interactions proton,neutron h w ~ h w ~ (π, ρ, ω) Ν1Ν1Ν1Ν1 Ν2Ν2Ν2Ν2 Ν1΄Ν1΄Ν1΄Ν1΄ Ν2΄Ν2΄Ν2΄Ν2΄ hwhwhwhw gsgsgsgs ~ 1 fm g s ~ 1 g s ~ 1 Z scale ~ fm Repulsive hard core of strong NN interaction  Meson exchange framework

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Weak Coupling Constants f π, h ρ 0, h ρ 1, h ρ 2, h ω 0, h ω 1, h ρ 1’ PNC at Atomic Level – Anapole Moments ( 133 Cs) PNC at Atomic Level – Anapole Moments ( 133 Cs) Determination: { f π, h ρ 0 } Longitudunal Asym in Elastic p + p ( 15, 45, 221, … MeV ) Longitudunal Asym in Elastic p + p ( 15, 45, 221, … MeV ) A L = 1±4 x 10 -7, Phys. Rev. Lett. 33, 1307, (1974) !! First non-zero PV in NN-system: A L =2.3±0.9 x Multiple energies: separation { h ρ, h  } Parity Mixed Doublets of Light Nuclei ( 18 F, 19 F, 21 Ne …) Parity Mixed Doublets of Light Nuclei ( 18 F, 19 F, 21 Ne …) Determination: { f π }

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay LANL A exp = - 5±0.5 x Goal: n + p d +  Accurate measurement of h 1  Taking Data !

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay The 10 MeV CW-Linac at IASA, Athens γ + d  p + n E(γ) = 3 – 8 MeV

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Summary Polarized sources and beam optics High rate integrating (few GHz) and counting (few MHz)detectors Cryogenic Targets Polarimetry Experimental Advances Strong Physics cases TeV scale physics complementary to colliders Nucleon Structure at high Q 2 high x Strange Form Factors

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Cesium PV Versus Time Modifications in the theoretical corrections to the atomic structure Standard Model sin 2  w Wieman et al. Bennett Wieman Derevianko Dzuba Flambaum Kozlov Porsev Tupitsyn Johnson Bednyhakov Soff Kuchiev Flambaum 2003

EINN05, Milos 21 September, 2005 David LHUILLIER – CEA Saclay Weak meson-N Coupling Constants DDH:Desplanques, Donoghue, Holstein DZ:Dubovic & Zenkin FCDH:Feldman, Crawford, Dubach, Holstein D:Desplanques KM:Kaiser & Meissner