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NESSiE

SPECTROMETER(S) Prospects for a New Neutrino CERN-PS Experiment:. NESSiE. N eutrino E xperiment with S pectrometer S i n E urope. As a summary of tensions on Neutrino Oscillation business:. F.Mills , July 2010. Neutrino Oscillation: problem solved?.

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NESSiE

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  1. SPECTROMETER(S) Prospects for a New Neutrino CERN-PS Experiment: NESSiE Neutrino Experiment with SpectrometerSin Europe Luca Stanco - CdS Padova

  2. As a summary of tensions on Neutrino Oscillation business: F.Mills, July 2010 Luca Stanco - CdS Padova

  3. Neutrino Oscillation: problem solved? • Neutrino oscillations have established a picture and a large number of experiments consistent with the mixing of three physical neutrino ne,nm and nt with mass eigenstates n1,n2 and n3. • There are however a number of anomalies which, if confirmed, could be due to the presence of an additional, large squared mass difference and of additional neutrinos. • Two distinct classes of anomalies have been observed, namely • apparent disappearance signals: (1) the anti-ne events detected from near-by nuclear reactors and (2) from the from Mega-Curie k-capture calibration sources in the Gallium experiments to detect solar ne • observation for excess signals of ne electrons from neutrinos from particle accelerators (LNSD/MiniBooNE) • and… MINOS (CPT?) Luca Stanco - CdS Padova

  4. Anomalies in n mesures at reactors G. Mention et al. arXiv:1101.2755v1 [hep-ex] Experimental results are compared to the prediction without oscillation, taking into account the new spectra, the neutron mean lifetime and the off-equilibrium effects. The averaged ratio is 0.937 ±0.027 Luca Stanco - CdS Padova

  5. LSND: Evidence for(e) Expectation for oscillations Beam related backgrounds Data points after background subtraction Excess of events: 87.9  22.4  6.0 Luca Stanco - CdS Padova

  6. Putting together LNSD and MiniBooNE F.Mills, ICHEP, July 2010 Plus reactors’ “anomaly”, Gallium “anomaly”, cosmology indications… Luca Stanco - CdS Padova

  7. Luca Stanco - CdS Padova

  8. A complicated picture ? CMB + LSS + ΛCDM Ns= 1.6 ± 0.9 Hamann, Hannestad, Raffelt, Tamborra, Wong, PRL 105 (2010) 181301 Number of sterile neutrinos • Sterile neutrino models • 3+2 next minimal extension to 3+1 models • 2 independent m2 • 4 mixing parameters • 1 Dirac CP phase allowing difference between neutrinos and antineutrinos FROM COSMOLOGY Luca Stanco - CdS Padova

  9. Why a New Neutrino Facility ? • The idea for reviving the CERN PS neutrino beam line was triggered by a letter of intent from an experimental collaboration led by C. Rubbia* • Since then a more concrete experimental proposal is being considered • However, it can also be used for other experiments/studies: • Neutrino cross section measurements at very low energies (on and/or off-axis) • Target R&D • Detector studies, etc...... REVIVAL OF THE CERN PS NEUTRINO BEAM * Memorandum to SPSC, March 9th 2011 Beyond 3 Family Neutrino Oscillations, 4 May 2011 Rende Steerenberg, CERN Switzerland

  10. Aim: Investigating the existence of sterile neutrinosthrough the measurement of νμ → νe oscillations by using a low energy νμ or νμ beam in combination with a close and far liquid argon time projection chamber. What about νμ → νm oscillations ?? Consider for example a 3+2 Sterile Neutrino model by Kopp et al. DISAPPEARANCE DISAPPEARANCE APPEARANCE TO BE FOLDED with the nm , ne , nm , ne BEAM compositions/contaminations and with n and n cross-sections ! Luca Stanco - CdS Padova

  11. C. Rubbia et al A search for anomalous neutrino disappearance and oscillatory phenomena at the CERN-PS” • Memorandum to SPSC, March 9th 2011 at PS site FAR NEAR The large number of models (i.e. the lack of conclusive DATA) implies the ABSOLUTE need for a DOUBLE measure: FAR and NEAR to establish what is oscillating and what is not TWO SPECTROMETERS Luca Stanco - CdS Padova

  12. Charge and momentum measurements in Neutrino Interactions for the Charge Current mode: important and challenging • Important because: • increase the active target mass by measuring the muon momentum • increase the range of Dm2 (at higher values, especially in the eV2 range) • calibration of the beam with a clean muon measurement at high p • normalization point for the NC/CC rates • clean separation of nu and anti-nu interactions • disentangle the nu and anti-nu reverse contaminations in the beams • Challenging because: • find best compromise between passive and active materials Luca Stanco - CdS Padova

  13. FAR site * Liquid Argon is the best option as for - backgrounds - energy range - full measure of n interaction Spectrometer The Target coverage must be as large as possible Luca Stanco - CdS Padova

  14. GOALS/CAVEATS Perform a DESIGN STUDY for a two-module Detector as - cheap - almost no R&D - fast - fully compatible with the LAr proposal(s) - standalone - maximizing the physics output Luca Stanco - CdS Padova

  15. In conclusion: • “light” spectrometer, e.g. 2.5 cm iron slabs • several detection layers, e.g. 8 layers per arm • as wide as possible, e.g. 2*8 m (w) * 5 m (h) Use RPC detectors ALAOP and Precision Trackers Dipole with B=1.5 Tesla FAR = 2 * NEAR 2 m (2 arms) 5 m 8 m 8 m UNDER STUDY !!! Luca Stanco - CdS Padova

  16. Possible Physics output: FAR site nm-bar LAr+Spect (Q) nm LAr+Spect (Q) Reconstructed Neutrino Energy Luca Stanco - CdS Padova

  17. Actions so far and in the near future MAY: presentations done to Neutrino Conferences ⇒ the physics case well accepted preliminary discussion with INFN mangement ⇒ INFN Giunta OK but no money for the beam discussions with CERN mangement ⇒ READY to pursue the beam project and to pay for the beam JUNE: preliminary discussions with CNII ⇒ go ahead with the study and the setting up of Collaboration SEPTEMBER: evaluation in CNII submission of a Memorandum to CERN-SPSC NEXT: optimize the magnets and the detectors Luca Stanco - CdS Padova

  18. CERN position • A very exciting physics experiment is proposed for the more than 50 years old CERN PS • CERN Research Board meeting of 8 June: Team set up. • TT7 and nTOF beam sharing makes efficient use of the CERN PS: • The proposed experiment could be completed in 3 to 4 runs without forming any competition for protons with other experiments • Shortening possible by dedicated running • nTOF would gain also on the number of integrated protons • No direct competition for protons between PS and SPS neutrino facilities • Large part of the required infrastructure is available, but needs to be consolidated • Everything else needs to be designed and constructed • The facility can also be (re-)used for other low energy neutrino physics, target R&D, Detector R&D, etc... Luca Stanco - CdS Padova

  19. NESSiE Collaboration Bari: 0.4 FTE/2 Bologna: 1.1/4 Frascati: 0.2/2 Lecce: 0.5/2 TOTAL: 4.7 FTE / 22 people Padova: 1.6/7 Roma1: 0.6/3 Salerno: 0.3/2 In case the DESIGN STUDY will become an EXPERIMENT Be ready to multiple people for about 2 and FTE for about 4 In the near future: expression of interest from - 2 other Italian sites - French groups - Cinese group Luca Stanco - CdS Padova

  20. Coinvolgimenti: BARI: Simulazione, Front-End BOLOGNA: Simulazione, Software, DAQ, Disegno, Meccanica FRASCATI: Simulazioni, Disegno, Rivelatori LECCE: Rivelatori, Meccanica, Front-End, DAQ PADOVA: Simulazione, Disegno, DAQ, Meccanica ROMA-1: Simulazione e Software SALERNO: Software e Calcolo Luca Stanco - CdS Padova

  21. NESSiE Gruppo di Padova: R.Bertolin (30%). Responsabile Locale F.Dal Corso (10%) S. Dusini (40%) C.Fanin (10%) M. Laveder (10%) M.Mezzetto (20%) L.Stanco (40%). Responsabile Nazionale 1.6 FTE • Riferimenti nella collaborazione • Alessandro Bertolin: DAQ • Stefano Dusini: Simulazione Detector e DAQ • - Marco Laveder: Studio Fisica • Mauro Mezzetto: Studio Fisica e Simulazione • Luca Stanco: Supervisione Costi e Collaborazione Nel 2012 si dovrà ottimizzare la struttura. È mandatory costituire un team multi-site di Ingegneri Meccanici. A Padova si chiedono 6 mesi-uomo di Ingegnere e 6 mesi-uomo di disegnatore Luca Stanco - CdS Padova

  22. NESSiE Richieste finanziarie 2012 (Richieste molto limitate per il prossimo anno) Missioni Interne: 27 K€ (6 a PD) Missioni Estero: 24 K€ (6 a PD) Consumo: 33 K€ (8 a PD) Inventario: 5 K€ (3 a PD) Tot 89 K€, di cui 23 a Padova Richieste ai servizi PADOVA per il 2012: Elettronica: 2 m.u. per consulenza DAQ 2 m.u. per consulenza Front-End Meccanica: 4 mesi uomo prototipizzazione Uffico Tecnico: 6+6 mesi per Struttura meccanica Luca Stanco - CdS Padova

  23. Tentative FINANCIAL and TEMPORAL plan for 2013-2017 2013 2014 2015 2016 2017 plus possible (minor) non-INFN contributions Luca Stanco - CdS Padova

  24. Learn Physics with Nessie Luca Stanco - CdS Padova

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