Hall A Collab. Mtg. June 2010 R. Michaels PVDIS at 11 GeV DIS Parity Asymmetry Uses the “SOLID” Spectrometer Spokesperson: Paul Souder (provided many slides)

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Presentation transcript:

Hall A Collab. Mtg. June 2010 R. Michaels PVDIS at 11 GeV DIS Parity Asymmetry Uses the “SOLID” Spectrometer Spokesperson: Paul Souder (provided many slides) Simulations: Eugene Chudakov Engineering: P. Reimer and ANL Also: P. Bosted, S. Brodsky, K. Kumar, J.T. Londergan, W. Melnitchouk, Z. Meziani, R. Michaels, M. Ramsey-Musolf, K. Paschke, M. Pitt, X. Zheng

Hall A Collab. Mtg. June 2010 R. Michaels Physics of PVDIS Search for Physics Beyond the Standard EW Model Search for parton-level CSV Precise Measurement of d/u ratio in proton Study Higher-Twist Effects. Unique sensitivity to axial hadronic weak neutral currents. Might help explain NuTeV anomaly No nuclear corrections Novel hadronic effects like quark-quark correlations Wide range of kinematics covered. Global fit to unfold the effects. How ?

Hall A Collab. Mtg. June 2010 R. Michaels PVDIS: Electron-Quark Scattering C 1u and C 1d will be determined to high precision by Q weak, APV Cs C 2u and C 2d are small and poorly known: one combination can be accessed in PV DIS New physics such as compositeness, leptoquarks: Deviations to C 2u and C 2d might be fractionally large AV V A PV elastic e-p scattering, APV PV deep inelastic scattering Moller PV is insensitive to the C ij

Hall A Collab. Mtg. June 2010 R. Michaels New combination of: Vector quark couplings C 1q Also axial quark couplings C 2q Deep Inelastic Scattering For an isoscalar target like 2 H, structure functions largely cancel in the ratio at high x e-e- N X e-e- Z*Z* ** At high x, A PV becomes independent of x, W, with well-defined SM prediction for Q 2 and y Sensitive to new physics at the TeV scale 0 1 at high x a(x) and b(x) contain quark distribution functions f i (x) PVDIS: Only way to measure C 2q

Hall A Collab. Mtg. June 2010 R. Michaels Higher Twist Coefficients in parity conserving (D i ) and nonconserving (C i ) Scattering (Does not Evolve) Evolves according To DGLAP equations Higher Twist is what is left over Higher Twist is any Q 2 -dependent deviation From the SM prediction

Hall A Collab. Mtg. June 2010 R. Michaels A New Design for Precision PV DIS Physics Over a Broad Kinematic Range High Luminosity on LH 2 & LD 2 Better than 1% errors for small bins x-range W 2 > 4 GeV 2 Q 2 range a factor of 2 for each x –(Except x~0.75) Moderate running times Solenoid (from BaBar, CDF or CLEOII ) contains low energy backgrounds (Moller, pions, etc) trajectories measured after baffles Fast tracking, particle ID, calorimetry, and pipeline electronics Precision polarimetry (0.4%)

Hall A Collab. Mtg. June 2010 R. Michaels SoLID Spectrometer Baffles GEM’s Gas Cerenkov Shashlyk

Hall A Collab. Mtg. June 2010 R. Michaels Lead Baffles SOLID Spectrometer using CDF coil

Hall A Collab. Mtg. June 2010 R. Michaels Kinematics at large x E / GeV

Hall A Collab. Mtg. June 2010 R. Michaels Errors (%) for A PV for bins in Q 2 and X. Total 120 days at 11 GeV and 60 days at 6.6 GeV for 50 uA and p e = Simulation by Eugene Chudakov

Hall A Collab. Mtg. June 2010 R. Michaels

Hall A Collab. Mtg. June 2010 R. Michaels 6 GeV PVDIS 11 GeV PVDIS Qweak

Hall A Collab. Mtg. June 2010 R. Michaels P. Bosted, J. P. Chen, E. Chudakov, A. Deur, O. Hansen, C. W. de Jager, D. Gaskell, J. Gomez, D. Higinbotham, J. LeRose, R. Michaels, S. Nanda, A. Saha, V. Sulkosky, B. Wojtsekhowski Jefferson Lab P. A. Souder, R. Holmes Syracuse University K. Kumar, D. McNulty, L. Mercado, R. Miskimen U. Massachusetts H. Baghdasaryan, G. D. Cates, D. Crabb, M. Dalton, D. Day, N. Kalantarians, N. Liyanage, V. V. Nelyubin, B. Norum, K. Paschke, S. Riordan, O. A. Rondon, M. Shabestari, J. Singh, A. Tobias, K. Wang, X. Zheng University of Virginia J. Arrington, K. Hafidi, P. E. Reimer, P. Solvignon Argonne D. Armstrong, T. Averett, J. M. Finn William and Mary P. Decowski Smith College L. El Fassi, R. Gilman, R. Ransome, E. Schulte Rutgers W. Chen, H. Gao, X. Qian, Y. Qiang, Q. Ye Duke University K. A. Aniol California State G. M. Urciuoli INFN, Sezione di Roma A. Lukhanin, Z. E. Meziani, B. Sawatzky Temple University P. M. King, J. Roche Ohio University E. Beise University of Maryland W. Bertozzi, S. Gilad, W. Deconinck, S. Kowalski, B. Moffit MIT Benmokhtar, G. Franklin, B. Quinn Carnegie Mellon G. Ron Tel Aviv University T. Holmstrom Longwood University P. Markowitz Florida International X. Jiang Los Alamos W. Korsch University of Kentucky J. Erler Universidad Autonoma de Mexico M. J. Ramsey-Musolf University of Wisconsin C. Keppel Hampton University H. Lu, X. Yan, Y. Ye, P. Zhu University of Science and Technology of China N. Morgan, M. Pitt Virginia Tech J.-C. Peng University of Illinois H. P. Cheng, R. C. Liu, H. J. Lu, Y. Shi Huangshan University S. Choi, Ho. Kang, Hy. Kang B. Lee, Y. Oh Seoul National University J. Dunne, D. Dutta Mississippi State K. Grimm, K. Johnston, N. Simicevic, S. Wells Louisiana Tech O. Glamazdin, R. Pomatsalyuk NSC Kharkov Institute for Physics and Technology Z. G. Xiao Tsinghua University B.-Q. Ma, Y. J. Mao Beijing University X. M. Li, J. Luan, S. Zhou China Institute of Atomic Energy B. T. Hu, Y. W. Zhang, Y. Zhang Lanzhou University C. M. Camacho, E. Fuchey, C. Hyde, F. Itard LPC Clermont, Université Blaise Pascal A. Deshpande SUNY Stony Brook A. T. Katramatou, G. G. Petratos Kent State University J. W. Martin University of Winnipeg Collaboration spokesperson