The LBNO long-baseline oscillation sensitivities with two conventional
neutrino beams at different baselines
arXiv
Authors:
LAGUNA-LBNO Collaboration, SK Agarwalla, L Agostino, M Aittola, A Alekou, B Andrieu, F Antoniou, R Asfandiyarov, D Autiero, O Bésida, A Balik, P Ballett, I Bandac, D Banerjee, W Bartmann, F Bay, B Biskup, AM Blebea-Apostu, A Blondel, M Bogomilov, S Bolognesi, E Borriello, I Brancus, A Bravar, M Buizza-Avanzini, D Caiulo, M Calin, M Calviani, M Campanelli, C Cantini, G Cata-Danil, S Chakraborty, N Charitonidis, L Chaussard, D Chesneanu, F Chipesiu, P Crivelli, J Dawson, I De Bonis, Y Declais, P Del Amo Sanchez, A Delbart, S Di Luise, D Duchesneau, J Dumarchez, I Efthymiopoulos, A Eliseev, S Emery, T Enqvist, K Enqvist, L Epprecht, AN Erykalov, T Esanu, D Franco, M Friend, V Galymov, G Gavrilov, A Gendotti, C Giganti, S Gilardoni, B Goddard, CM Gomoiu, YA Gornushkin, P Gorodetzky, A Haesler, T Hasegawa, S Horikawa, K Huitu, A Izmaylov, A Jipa, K Kainulainen, Y Karadzhov, M Khabibullin, A Khotjantsev, AN Kopylov, A Korzenev, S Kosyanenko, D Kryn, Y Kudenko, P Kuusiniemi, I Lazanu, C Lazaridis, J-M Levy, K Loo, J Maalampi, RM Margineanu, J Marteau, C Martin-Mari, V Matveev, E Mazzucato, A Mefodiev, O Mineev, A Mirizzi, B Mitrica, S Murphy, T Nakadaira, S Narita, DA Nesterenko, K Nguyen, K Nikolics, E Noah, Yu Novikov, A Oprima, J Osborne, T Ovsyannikova, Y Papaphilippou, S Pascoli, T Patzak, M Pectu, E Pennacchio, L Periale, H Pessard, B Popov, M Ravonel, M Rayner, F Resnati, O Ristea, A Robert, A Rubbia, K Rummukainen, A Saftoiu, K Sakashita, F Sanchez-Galan, J Sarkamo, N Saviano, E Scantamburlo, F Sergiampietri, D Sgalaberna, E Shaposhnikova, M Slupecki, D Smargianaki, D Stanca, R Steerenberg, AR Sterian, P Sterian, S Stoica, C Strabel, J Suhonen, V Suvorov, G Toma, A Tonazzo, WH Trzaska, R Tsenov, K Tuominen, M Valram, G Vankova-Kirilova, F Vannucci, G Vasseur, F Velotti, P Velten, V Venturi, T Viant, S Vihonen, H Vincke, A Vorobyev, A Weber, S Wu, N Yershov, L Zambelli, M Zito
Abstract:
The proposed Long Baseline Neutrino Observatory (LBNO) initially consists of
$\sim 20$ kton liquid double phase TPC complemented by a magnetised iron
calorimeter, to be installed at the Pyh\"asalmi mine, at a distance of 2300 km
from CERN. The conventional neutrino beam is produced by 400 GeV protons
accelerated at the SPS accelerator delivering 700 kW of power. 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 $\delta_{CP}$ and matter. In this paper we
show how this comprehensive physics case can be further enhanced and
complemented if a neutrino beam produced at the Protvino IHEP accelerator
complex, at a distance of 1160 km, and with modest power of 450 kW is aimed
towards the same far detectors. We show that the coupling of two independent
sub-MW conventional neutrino and antineutrino beams at different baselines from
CERN and Protvino will allow to measure CP violation in the leptonic sector at
a confidence level of at least $3\sigma$ for 50\% of the true values of
$\delta_{CP}$ with a 20 kton detector. With a far detector of 70 kton, the
combination allows a $3\sigma$ sensitivity for 75\% of the true values of
$\delta_{CP}$ after 10 years of running. Running two independent neutrino
beams, each at a power below 1 MW, is more within today's state of the art than
the long-term operation of a new single high-energy multi-MW facility, which
has several technical challenges and will likely require a learning curve.
