# The LBNO long-baseline oscillation sensitivities with two conventional neutrino beams at different baselines

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.
Type de document :
Pré-publication, Document de travail
21 pages, 12 figures. 2014
Domaine :

http://hal.in2p3.fr/in2p3-01091466
Contributeur : Claudine Bombar <>
Soumis le : vendredi 5 décembre 2014 - 14:36:26
Dernière modification le : mercredi 23 janvier 2019 - 14:38:46

### Identifiants

• HAL Id : in2p3-01091466, version 1
• ARXIV : 1412.0804

### Citation

S. K. Agarwalla, L. Agostino, M. Aittola, A. Alekou, B. Andrieu, et al.. The LBNO long-baseline oscillation sensitivities with two conventional neutrino beams at different baselines. 21 pages, 12 figures. 2014. 〈in2p3-01091466〉

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