FINeSSE , D s Measurement through the Neutrino-Nucleon Neutral Current Scattering

1. Teppei Katori, Indiana University Cyclotron Facility FINeSSE, Ds Measurement through the Neutrino-Nucleon Neutral Current Scattering I Physics of Ds II FINeSSE III Scibath pilot detector beam test IV Ds measurement V Conclusion Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

2. SSE Fine-grained Intense Neutrino Scattering Scintillator Experiment FINe FINeSSE Collaboration L. Bugel, J. M. Conrad, M. Shaevitz, G. P. Zeller Columbia University, Nevis Labs, Irvington S. Brice, D. Finley, R. Stefanski Fermi National Accelerator Laboratory, Batavia J. C. Peng University of Illinois, Urbana-Champaign C. Horowitz, T. Katori, H.-O. Meyer, M. Novak, C. Polly, R. Tayloe, G. Visser Indiana University Cyclotron Facility, Bloomington C. Green, G. T. Garvey, W. C. Louis, G. McGregor, H. Ray, R. Van de Water Los Alamos National Laboratory, Los Alamos W. Metcalf, M. O. Wascko Louisiana State University, Baton Rouge V. Papavassiliou, S.F. Pate New Mexico State University, Las Cruces A. Curioni, B. T. Fleming Yale University, New Haven, Connecticut Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

3. I Physics of Ds

4. I Physics of Ds1. What is Ds? Ds Strange Quark Spin Component in the Nucleon (Axial Charge of Strange Quark) limit of the Nucleon Neutral Current Weak Axial Vector IsoScalar Form Factor (can be measured by elastic scattering) isospin isovector isoscalar Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

5. I Physics of Ds1. What is Ds? Ds Strange Quark Spin Component in the Nucleon limit of the 1st moment of polarized strange quark PDF this sum rule is the connection between Elastic Scattering (ES) experiment and Deep Inelastic Scattering (DIS) experiment Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

6. I Physics of Ds2. How to measure Ds? 0.8 0.4 0.0 -0.4 -0.8 Inclusive DIS ex) SMC “Spin Crisis” Spin Muon Collaboration (Phys.Rev.D58(1998)112002) -2 0 2 Spin Muon Collaboration (Phys.Rev.D56(1997)5330) SU(3)f assumption Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

7. I Physics of Ds2. How to measure Ds? Semi-Inclusive DIS ex) HERMES no extrapolation to x=0 and x=1 HERMES Collaboration (Phys.Rev.Lett. 92(2004)012005) Ds is the very interesting open question! Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

8. I Physics of Ds2. How to measure Ds? Neutrino ES Clean, Theoretically Robust Method Llewellyn-Smith formalism for Neutral Current Elastic Scattering information about Ds Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

9. I Physics of Ds2. How to measure Ds? Neutrino ES ex) BNL E734 Ahrens et al.('87) with taking account form factor uncertainties from Fs1 ,Fs2 and MA , Garvey et al.('93) with Parity Violating electron (PVe) scattering experiment data (from HAPPEX) L. A. Ahrens et al. (Phys.Rev.D 35(1987)785) Pate ('04) - higher statistics - better tracking system - extrapolation from smaller Q2 - low statistics - large systematics - extrapolation from relatively high Q2 FINeSSE Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

10. II FINeSSE

11. II FINeSSE1. Motivation Physics - Measurement of Low E Neutral Current proton (NCp) elastic scattering and Charge Current Quasi-Elastic (CCQE) scattering - Low E (<1GeV) cross section measurement Detector Requirement - Low E intense neutrino beam - active high resolution tracking detector - good performance for large angle event p low Q2 (=2MPTP) and large angle event 1GeV neutrino XS for nucleon knockout from 12C van der Ventel and Piekarewicz (Phys.Rev.C69(2004)035501) non-segmented isotropic liquid scintillator detector Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

12. II FINeSSE1. Motivation Y Z X Beam non-segmented isotropic liquid scintillator detector || 3-dimiensional tracking detector segmented liquid scintillator detector Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

13. II FINeSSE2. Fine-grained Neutrino Scintillator Scattering Experiment FINeSSE detector The Vertex Detector - to precisely track low-energy protons - (2.5m)3 active liquid scintillator volume - 19200 (80x80x3) 1.5 mm WLS fibers on 3cm spacing with 3 orientations Vertex Detector “Scibath” fiber orientation The Muon Rangestack - to track and measure the energy of muons Read out PMT and front-end electronics Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul.8th, 05

14. fiber hits, (size  # g collected) II FINeSSE3. FINeSSE physics CCQE event T(mu)=820MeV T(p)=150MeV NCp event T(p)=100MeV FINeSSE “Scibath” simulation simulated hits and reconstructed tracks in the Vertex Detector XZ XZ generated YZ reconstructed YZ Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

15. III Scibath pilot detector beam test

16. III Scibath pilot detector beam test1. Pilot type detector 1-dimension, 30 WLS fibers array in the liquid scintillator Fiber and MAPMT coupling Read out by 16ch. MAPMT (H8711) Prototype “Scibath” have been tested by using 200MeV proton beam at Indiana University Cyclotron Facility (IUCF), Radiation Effect Research Program (RERP) p MAPMT Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

17. III Scibath pilot detector beam test2. Light yield p Beam test setup, RERP@IUCF trigger2 trigger1 Light Yield Detected light is the integration of all light from proton in the detector Typical ADC spectrum p MAPMT 172p.e./fiber for near tracks with 200MeV proton Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

18. III Scibath pilot detector beam test3. Position resolution Position Resolution All fibers' information is used to calculate single particle tracks (unlike segmented tracking detector) 2cm p p MAPMT Coordinate position resolution p Angular position resolution Coordinate Position Resolution 0.44cm Angular Position Resolution 5.6O Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

19. IV Ds measurement

20. IV Ds measurement 1. Neutrino beam FNAL Booster neutrino beam flux at 100m location (/GeV/yr/cm2) Neutrino beam requirement - intense - Low E (<1GeV) - short high E tail so candidate places are - FNAL Booster - BNL AGS - JPARC - We are working our proposal to BNL - response about our LoI from BNL "The PAC considers the physics of this experiment compelling. While deep inelastic scattering provides tantalizing information about the spin carried by the strange quarks, the proton isoscalar axial form factor can only be uniquely obtained by such a measurement." Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

21. IV Ds measurement 2. NCp/CCQE ratio FINeSSE ratio scheme non-zero Ds Ideally speaking, we want to measure but this is difficult, so instead, we measure, ratio of NC and CC cancel outneutrino flux uncertainty and nuclear effect uncertainty (relatively model independent) Maieron and Alberico (NuFact '03) Nuclear effect can be extracted from A(e,e'p) data Martinez et al. ('05) Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

22. IV Ds measurement 2. Experimental error CCQE reconstructed events reconstructed events (with fn. of Q2 ) NCp efficiency is high around Q2 = 0.2 - 0.6 GeV2 region (fiducial) efficiencies Experimental error can be extrapolated by using dipole parameterization for Q2 dependence measured ratio (stat & total errors) Ds = -0.1 Ds = 0.0 Ds = +0.1 Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

23. IV Ds measurement 3. Form factor error error band of Ds MA = 1.00±0.02 GeV also depends on MA, F1s and F2s F1s= 0.0±0.03 Form factor uncertainties is evaluated from G0 experiment expected errors F2s= 0.0±0.09 F1s and F2s could be non-zero? G0 collabo. (nucl-ex/0506021) Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

24. V Conclusion I. Ds is a great interest property from the community II. FINeSSE can measure Ds with theoretically clean and robust method III. FINeSSE is experimentally capable to measure Ds with the smallest error Thank you for your attention! Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 8th, 05

25. More?

26. III Scibath pilot detector beam test4. Non-WLS liquid scintillator Trick of Non-Wave Length Shifting liquid scintillator We remove the Wave Length Shifter from liquid scintillator (Non-WLS liquid scintillator) and replace fiber from Blue-Green fiber to UV-Blue fiber, for better coordinate resolution and higher light output p p PMT PMT traditional scheme of light transportation pUVBlueGreen PMT new scheme pUVBlue PMT Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

27. III Scibath pilot detector beam test4. Non-WLS liquid scintillator Trick of Non-Wave Length Shifting We remove the Wave Length Shifter from liquid scintillator (Non-WLS liquid scintillator) and replace fiber from Blue-Green fiber to UV-Blue fiber, for better coordinate resolution and higher light output p p PMT PMT new scheme pUVBluePMT traditional scheme of light transportation pUVBlueGreenPMT (1) Non-WLS liquid scintillator has shorter attenuation length nicely localize light output (2) Non-WLS liquid scintillator has locally higher light output higher amount of light to the nearest fiber (3) UV-Blue fiber sends blue light to MAPMT higher quantum efficiency (4) UV process is faster (5) UV light is less reflective Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

28. III Scibath pilot detector beam test5. Scan plot Blue-Greenfiber scan plot data p MAPMT p Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

29. III Scibath pilot detector beam test6. Second beam test Blue-Greenfiber scan plot data p MAPMT p UV-Bluefiber scan plot data UV-Blue fiber makes sharper and narrower peak than Blue-Green fiber better light localization better position resolution Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

30. III Scibath pilot detector beam test7. Position resolution Monte Carlo Comparison Angular resolution Coordinate resolution Blue-Green fiber resolution ~X2 better resolution UV-Blue fiberresolution combination of UV-Blue fiber and Non-WLS Liquid Scintillator gives better position resolution! Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

31. IV Ds measurement 4. Event table Neutrino mode 80m baseline 50m decay pipe for 1X1020 POT per 1 ton detector with 100% detection efficiency Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

32. IV Ds measurement 4. Event table Anti-neutrino mode 80m baseline 50m decay pipe for 1X1020 POT per 1 ton detector with 100% detection efficiency Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05

33. IV Ds measurement 5. Anti-neutrino run Anti-neutrino mode is more sensitive to Ds, because both numerator and denominator are smaller than neutrino mode neutrino But this mode is more difficult, because of - lower flux - lower xs - neutrino contamination in anti-neutrino beam - misID of CCQE anti-neutrino In consequence, - experimental error - form factor error Teppei Katori, Indiana University Cyclotron Facility, Pacific Spin 2005, Jul. 5, 05