Dortmund Germany E Paschos Fermi National Accelerator Laboratory
Dortmund, Germany – E. Paschos; Fermi National Accelerator Laboratory – M. Andrews, D. Boehnlein, N. Grossman, D. A. Harris#, J. G. Morfin*, A. Pla-Dalmau, P. Rubinov, P. Shanahan, P. Spentzouris; Hampton University – M. E. Christy, W. Hinton, C. E. Keppel; Illinois Institute of Technology - R. Burnstein, O. Kamaev, N. Solomey; Institute for Nuclear Study, Russia – MINERνA will run symbiotically in the Nu. MI beam constructed for the MINOS experiment. This intense beam, with adjustable horns, offers an energy reach from approximately 1 Gev to 25 Gev. The MIPP experiment will measure hadron production from the Nu. MI target, allowing the neutrino flux and spectrum to be determined with unprecedented accuracy for absolute cross section studies. side HCAL Veto HCAL side ECAL Front CAL & Nuclear Targets ECAL Fully Active Scintillating Strips Events/ton Elastic Resonant Transition DIS Coherent Total CC 103 k 196 k 210 k 420 k 8. 3 k 940 k NC 42 k 70 k 65 k 125 k 4. 2 k 288 k The fully active scintillator target is surrounded by nuclear targets and calorimeters. Interactions in the scintillator (CHn) can be compared with interactions in the upstream Pb and Fe targets to probe nuclear effects. Sample Events Detector Elements Active elements are triangular bars of extruded scintillator with embedded WLS fibers that run to PMT boxes and then are readout on front-end electronic boards. Modular Construction: For flexibility of design and ease of installation in the Nu. MI near hall, the detector is built in planes. Calorimeters absorbers are thin radiators covering scintillating strips. Shown is an upstream ECAL module, side view and magnification. The MINERνA detector takes advantage of the unprecedented high intensity of the Nu. MI neutrino beam to build a detector capable of full reconstruction of exclusive final states. OD Pb+20%Fe ECAL Saint Xavier University – A. Chakravorty; extruded scintillator The fine grained, fully active central region allows excellent spatial and directional resolution. Sample quasi-elastic event: νµn→pµProton and muon tracks resolved and energy deposited shown as size of hit. Topological reconstruction is supplemented by particle ID based on d. E/dx, hermetic calorimetry, and charge identification for long muons and the ability to tag long-lived (strange) final-states with nanosecond hit timing. Sample π0 production: νµp→νµpπ0 Photon tracks distinguished and vertexed. Proposal and Addendum located at hep-ex/0405002 * - Co-Spokesperson # - Project Manager Purple – HEP Experimental Blue – Nuclear Experimental Red - Theory R. Bradford, H. Budd, J. Chvojka, P. De Barbaro, S. Manly, K. Mc. Farland*, J. Park, W. Sakumoto, J. Steinman; Tufts University – D. Cherdack, H. Gallagher, T. Kafka, W. A. Mann, W. Oliver; College of William and Mary – J. K. Nelson, J. X. Yumiceva; University of Athens, Greece – D. Drakoulakos, P. Stamoulis, G. Tzanakos, M, Zois; University of California, Irvine – D. Casper, J. Dunmore, C. Regis, B. Ziemer; University of Detector Overview S. Kulagin; James Madison University - I. Niculescu, G. Niculescu; Northern Illinois University – G. Blazey, M. A. C. Cummings, V. Rykalin; Thomas Jefferson National Accelerator Facility – W. K. Brooks, A. Brueli, R. Ent, D. Gaskell, W. Melnitchouk, S. Wood; University of Pittsburgh – S. Boyd, S. Dytman, M. S. Kim, D. Naples, V. Paolone; University of Rochester – A. Bodek, Beam and Data Sample Rutgers University – R. Gilman, C. Glashausser, X. Jiang, G. Kumbartzki, R. Ransome, E. Schulte;
Oscillation Physics: Motivation Oscillation Physics: Impact The plot at right shows a case study of MINERνA’s ability to improve the precision measurement of Δm 223 by reducing systematic uncertainties in the neutrino energy reconstruction. With better understanding of hadron production and final-state interactions, MINOS can achieve a sensitivity comparable To double the planned number of protons on target without MINERνA. Pion production contaminates kinematic reconstruction of neutrino energy in K 2 K and T 2 K, limiting precision measurements of Δm 223 and sin 22θ 23. Cross-section uncertainties and final-state interactions smear Evis→Eν calibration for MINOS and NOνA as well. The plot at left shows a case study of a search for θ 13 with the proposed NOνA experiment. Without better understanding of the backgrounds, provided by MINERνA, the experiment will be limited by systematics for values of θ 13 close to the CHOOZ bound. Oscillation changes the mixture of reaction types between near and far detectors – an important source of systematic uncertainty. for 2004 NOνA design, hep-ex/41005 Hadronic/Nuclear Physics With MINERνA Existing Cross-Section Data Below: World data on charged current coherent pion production, with the prediction of the Rein-Sehgal model. Available data do not cover the range of nuclei used in modern detectors, and in the few-Ge. V regime are limited to two Measurements with almost 100% errors. Even for quasi-elastic scattering, experimental uncertainties due to the nucleon form factor and nuclear effects are relatively large. Measurements of quasi-elastic neutrino scattering in MINERνA will allow a precise measurement of the axial form factor of the proton as a function of Q 2. Above: Existing data on charged current single pion production with predictions from the Neugen simulation. The data are characterized by small statistical power, undocumented corrections for nuclear effects, and uncertain absolute normalization. The poor agreements between different measurements reflects these problems. Data on exclusive multi-pion and strange particle production and neutral currents is even more limited. The transition between resonant and DIS regimes is likewise very poorly understood. Precision measurement of coherent pion production will allow the first measurement of the A-dependence of this process. Coherent π0 production is a background to νe searches. MINERνA Status and Projected Milestones April 2004 – Stage I approval from FNAL PAC October 2004 – Complete first Vertical Slice Test with MINERνA extrusions, WLS fiber and Front-End electronics January 2005 – First Project Director’s (‘Temple’) Review Summer 2005 – Second Vertical Slice Test End CY 2005 – Projected Date for MINERv. A Project Baseline Review October 2006 – Start of Construction Saint Xavier University – A. Chakravorty; Summer 2008 – Begin MINERv. A Installation and Commissioning in Nu. MI Near Hall Proposal and Addendum located at hep-ex/0405002 Purple – HEP Experimental Blue – Nuclear Experimental Red - Theory R. Bradford, H. Budd, J. Chvojka, P. De Barbaro, S. Manly, K. Mc. Farland*, J. Park, W. Sakumoto, J. Steinman; * - Co-Spokesperson # - Project Manager S. Kulagin; James Madison University - I. Niculescu, G. Niculescu; Northern Illinois University – G. Blazey, M. A. C. Cummings, V. Rykalin; Thomas Jefferson National Accelerator Facility – W. K. Brooks, A. Brueli, R. Ent, D. Gaskell, W. Melnitchouk, S. Wood; University of Pittsburgh – S. Boyd, S. Dytman, M. S. Kim, D. Naples, V. Paolone; University of Rochester – A. Bodek, Tufts University – D. Cherdack, H. Gallagher, T. Kafka, W. A. Mann, W. Oliver; College of William and Mary – J. K. Nelson, J. X. Yumiceva; University of Athens, Greece – D. Drakoulakos, P. Stamoulis, G. Tzanakos, M, Zois; University of California, Irvine – D. Casper, J. Dunmore, C. Regis, B. Ziemer; University of Dortmund, Germany – E. Paschos; Fermi National Accelerator Laboratory – M. Andrews, D. Boehnlein, N. Grossman, D. A. Harris#, J. G. Morfin*, A. Pla-Dalmau, P. Rubinov, P. Shanahan, P. Spentzouris; Hampton University – M. E. Christy, W. Hinton, C. E. Keppel; Illinois Institute of Technology - R. Burnstein, O. Kamaev, N. Solomey; Institute for Nuclear Study, Russia – Rutgers University – R. Gilman, C. Glashausser, X. Jiang, G. Kumbartzki, R. Ransome, E. Schulte;
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