Optimised sensitivity to leptonic CP violation from spectral information: the LBNO case at 2300 km baseline
Abstract
One of the main goals of the Long Baseline Neutrino Observatory (LBNO) is to study the behaviour (spectral information) of the electron neutrino and antineutrino appearance probabilities, in order to determine the unknown CP-violation phase and discover CP-violation in the leptonic sector. The result is based on the measurement of the appearance probabilities in a broad range of energies, covering t he 1st and 2nd oscillation maxima, at a very long baseline of 2300 km. The sensitivity of the experiment can be maximised by optimising the energy spectra of the neutrino and anti-neutrino fluxes. Such an optimisation requires exploring an extended range of parameters describing in details the geometries and properties of the primary protons, hadron target and focusing elements in the neutrino beam line. In this paper we present a numerical solution that leads to an optimised energy spectra and study its impact on the sensitivity of LBNO to discover leptonic CP violation. In the optimised flux both 1st and 2nd oscillation maxima play an important role in the CP sensitivity. The studies also show that this configuration is less sensitive to systematic errors (e.g. on the total event rates) than an experiment which mainly relies on the neutrino-antineutrino asymmetry at the 1st maximum to determine the existence of CP-violation.
Cite
@article{arxiv.1412.0593,
title = {Optimised sensitivity to leptonic CP violation from spectral information: the LBNO case at 2300 km baseline},
author = {LBNO Collaboration and S. K. Agarwalla and L. Agostino and M. Aittola and A. Alekou and B. Andrieu and F. Antoniou and R. Asfandiyarov and D. Autiero and O. Bésida and A. Balik and P. Ballett and I. Bandac and D. Banerjee and W. Bartmann and F. Bay and B. Biskup and A. M. Blebea-Apostu and A. Blondel and M. Bogomilov and S. Bolognesi and E. Borriello and I. Brancus and A. Bravar and M. Buizza-Avanzini and D. Caiulo and M. Calin and M. Calviani and M. Campanelli and C. Cantini and G. Cata-Danil and S. Chakraborty and N. Charitonidis and L. Chaussard and D. Chesneanu and F. Chipesiu and P. Crivelli and J. Dawson and I. De Bonis and Y. Declais and P. Del Amo Sanchez and A. Delbart and S. Di~Luise and D. Duchesneau and J. Dumarchez and I. Efthymiopoulos and A. Eliseev and S. Emery and T. Enqvist and K. Enqvist and L. Epprecht and A. N. Erykalov and T. Esanu and D. Franco and M. Friend and V. Galymov and G. Gavrilov and A. Gendotti and C. Giganti and S. Gilardoni and B. Goddard and C. M. Gomoiu and Y. A. Gornushkin and P. Gorodetzky and A. Haesler and T. Hasegawa and S. Horikawa and K. Huitu and A. Izmaylov and A. Jipa and K. Kainulainen and Y. Karadzhov and M. Khabibullin and A. Khotjantsev and A. N. Kopylov and A. Korzenev and S. Kosyanenko and D. Kryn and Y. Kudenko and P. Kuusiniemi and I. Lazanu and C. Lazaridis and J. -M. Levy and K. Loo and J. Maalampi and R. M. Margineanu and J. Marteau and C. Martin-Mari and V. Matveev and E. Mazzucato and A. Mefodiev and O. Mineev and A. Mirizzi and B. Mitrica and S. Murphy and T. Nakadaira and S. Narita and D. A. Nesterenko and K. Nguyen and K. Nikolics and E. Noah and Yu. Novikov and A. Oprima and J. Osborne and T. Ovsyannikova and Y. Papaphilippou and S. Pascoli and T. Patzak and M. Pectu and E. Pennacchio and L. Periale and H. Pessard and B. Popov and M. Ravonel and M. Rayner and F. Resnati and O. Ristea and A. Robert and A. Rubbia and K. Rummukainen and A. Saftoiu and K. Sakashita and F. Sanchez-Galan and J. Sarkamo and N. Saviano and E. Scantamburlo and F. Sergiampietri and D. Sgalaberna and E. Shaposhnikova and M. Slupecki and D. Smargianaki and D. Stanca and R. Steerenberg and A. R. Sterian and P. Sterian and S. Stoica and C. Strabel and J. Suhonen and V. Suvorov and G. Toma and A. Tonazzo and W. H. Trzaska and R. Tsenov and K. Tuominen and M. Valram and G. Vankova-Kirilova and F. Vannucci and G. Vasseur and F. Velotti and P. Velten and V. Venturi and T. Viant and S. Vihonen and H. Vincke and A. Vorobyev and A. Weber and S. Wu and N. Yershov and L. Zambelli and M. Zito},
journal= {arXiv preprint arXiv:1412.0593},
year = {2014}
}
Comments
25 pages, 20 figures