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The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment.

Agarwalla, S.K. and Agostino, L. and Aittola, M. and Alekou, A. and Andrieu, B. and Angus, D. and Antoniou, F. and Ariga, A. and Ariga, T. and Asfandiyarov, R. and Autiero, D. and Ballett, P. and Bandac, I. and Banerjee, D. and Barker, G. J. and Barr, G. and Bartmann, W. and Bay, F. and Berardi, V. and Bertram, I. and Bésida, O. and Blebea-Apostu, A.M. and Blondel, A. and Bogomilov, M. and Borriello, E. and Boyd, S. and Brancus, I. and Bravar, A. and Buizza-Avanzini, M. and Cafagna, F. and Calin, M. and Calviani, M. and Campanelli, M. and Cantini, C. and Caretta, O. and Cata-Danil, G. and Catanesi, M.G. and Cervera, A. and Chakraborty, S. and Chaussard, L. and Chesneanu, D. and Chipesiu, F. and Christodoulou, G. and Coleman, J. and Crivelli, P. and Davenne, T. and Dawson, J. and De Bonis, I. and De Jong, J. and Déclais, Y. and Del Amo Sanchez, P. and Delbart, A. and Densham, C. and Di Lodovico, F. and Di Luise, S. and Duchesneau, D. and Dumarchez, J. and Efthymiopoulos, I. and Emery, S. and Enqvist, K. and Enqvist, T. and Epprecht, L. and Ereditato, A. and Erykalov, A.N. and Esanu, T. and Finch, A.J. and Fitton, M.D. and Franco, D. and Galymov, V. and Gavrilov, G. and Gendotti, A. and Giganti, C. and Goddard, B. and Gomez, J.J. and Gomoiu, C.M. and Gornushkin, Y.A. and Gorodetzky, P. and Grant, N. and Haesler, A. and Haigh, M.D. and Hasegawa, T. and Haug, S. and Hierholzer, M. and Hissa, J. and Horikawa, S. and Huitu, K. and Ilic, J. and Ioannisian, A.N. and Izmaylov, A. and Jipa, A. and Kainulainen, K. and Kalliokoski, T. and Karadzhov, Y. and Kawada, J. and Khabibullin, M. and Khotjantsev, A. and Kokko, E. and Kopylov, A.N. and Kormos, L.L. and Korzenev, A. and Kosyanenko, S. and Kreslo, I. and Kryn, D. and Kudenko, Y. and Kudryavtsev, V.A. and Kumpulainen, J. and Kuusiniemi, P. and Lagoda, J. and Lazanu, I. and Levy, J.-M. and Litchfield, R.P. and Loo, K. and Loveridge, P. and Maalampi, J. and Magaletti, L. and Margineanu, R.M. and Marteau, J. and Martin-Mari, C. and Matveev, V. and Mavrokoridis, K. and Mazzucato, E. and McCauley, N. and Mercadante, A. and Mineev, O. and Mirizzi, A. and Mitrica, B. and Morgan, B. and Murdoch, M. and Murphy, S. and Mursula, K. and Narita, S. and Nesterenko, D.A. and Nguyen, K. and Nikolics, K. and Noah, E. and Novikov, Yu. and O’Keeffe, H. and Odell, J. and Oprima, A. and Palladino, V. and Papaphilippou, Y. and Pascoli, S. and Patzak, T. and Payne, D. and Pectu, M. and Pennacchio, E. and Periale, L. and Pessard, H. and Pistillo, C. and Popov, B. and Przewlocki, P. and Quinto, M. and Radicioni, E. and Ramachers, Y. and Ratoff, P.N. and Ravonel, M. and Rayner, M. and Resnati, F. and Ristea, O. and Robert, A. and Rondio, E. and Rubbia, A. and Rummukainen, K. and Sacco, R. and Saftoiu, A. and Sakashita, K. and Sarkamo, J. and Sato, F. and Saviano, N. and Scantamburlo, E. and Sergiampietri, F. and Sgalaberna, D. and Shaposhnikova, E. and Slupecki, M. and Sorel, M. and Spooner, N.J.C. and Stahl, A. and Stanca, D. and Steerenberg, R. and Sterian, A.R. and Sterian, P. and Still, B. and Stoica, S. and Strauss, T. and Suhonen, J. and Suvorov, V. and Szeptycka, M. and Terri, R. and Thompson, L.F. and Toma, G. and Tonazzo, A. and Touramanis, C. and Trzaska, W.H. and Tsenov, R. and Tuominen, K. and Vacheret, A. and Valram, M. and Vankova-Kirilova, G. and Vanucci, F. and Vasseur, G. and Velotti, F. and Velten, P. and Viant, T. and Vincke, H. and Virtanen, A. and Vorobyev, A. and Wark, D. and Weber, A. and Weber, M. and Wiebusch, C. and Wilson, J.R. and Wu, S. and Yershov, N. and Zalipska, J. and Zito, M. and LAGUNA-LBNO collaboration, (2014) 'The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment.', Journal of high energy physics., 2014 (5). p. 94.


The next generation neutrino observatory proposed by the LBNO collaboration will address fundamental questions in particle and astroparticle physics. The experiment consists of a far detector, in its first stage a 20 kt LAr double phase TPC and a magnetised iron calorimeter, situated at 2300 km from CERN and a near detector based on a highpressure argon gas TPC. The long baseline provides a unique opportunity to study neutrino flavour oscillations over their 1st and 2nd oscillation maxima exploring the L/E behaviour, and distinguishing effects arising from δ CP and matter. In this paper we have reevaluated the physics potential of this setup for determining the mass hierarchy (MH) and discovering CP-violation (CPV), using a conventional neutrino beam from the CERN SPS with a power of 750 kW. We use conservative assumptions on the knowledge of oscillation parameter priors and systematic uncertainties. The impact of each systematic error and the precision of oscillation prior is shown. We demonstrate that the first stage of LBNO can determine unambiguously the MH to > 5σ C.L. over the whole phase space. We show that the statistical treatment of the experiment is of very high importance, resulting in the conclusion that LBNO has ~ 100% probability to determine the MH in at most 4-5 years of running. Since the knowledge of MH is indispensable to extract δ CP from the data, the first LBNO phase can convincingly give evidence for CPV on the 3σ C.L. using today’s knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.

Item Type:Article
Keywords:Oscillation, Neutrino Detectors and Telescopes, CP violation.
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
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Publisher statement:Open Access, © The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Date accepted:No date available
Date deposited:19 May 2015
Date of first online publication:May 2014
Date first made open access:No date available

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