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

The LHCb collaboration

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

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 magnetized 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 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 > 5 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 CP from the data, the first LBNO phase can convincingly give evidence for CPV on the 3 C.L. using today’s knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.

Original languageEnglish (US)
Article number094
JournalJournal of High Energy Physics
Volume2014
Issue number5
DOIs
StatePublished - May 21 2014
Externally publishedYes

Fingerprint

CP violation
hierarchies
neutrinos
oscillations
neutrino beams
physics
detectors
systematic errors
calorimeters
observatories
argon
iron
gases

Keywords

  • CP violation
  • Neutrino Detectors and Telescopes
  • Oscillation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

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

In: Journal of High Energy Physics, Vol. 2014, No. 5, 094, 21.05.2014.

Research output: Contribution to journalArticle

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abstract = "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 magnetized 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 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 > 5 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 CP from the data, the first LBNO phase can convincingly give evidence for CPV on the 3 C.L. using today’s knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.",
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author = "{The LHCb collaboration} and Agarwalla, {S. K.} and L. Agostino and M. Aittola and A. Alekou and B. Andrieu and D. Angus and F. Antoniou and A. Ariga and T. Ariga and R. Asfandiyarov and D. Autiero and P. Ballett and I. Bandac and D. Banerjee and Barker, {G. J.} and G. Barr and W. Bartmann and F. Bay and V. Berardi and I. Bertram and O. B{\'e}sida and Blebea-Apostu, {A. M.} and A. Blondel and M. Bogomilov and Enrico Borriello and S. Boyd and I. Brancus and A. Bravar and M. Buizza-Avanzini and F. Cafagna and M. Calin and M. Calviani and M. Campanelli and C. Cantini and O. Caretta and G. Cata-Danil and Catanesi, {M. G.} and A. Cervera and S. Chakraborty and L. Chaussard and D. Chesneanu and F. Chipesiu and G. Christodoulou and J. Coleman and P. Crivelli and T. Davenne and J. Dawson and {De Bonis}, I. and {De Jong}, J. and Y. D{\'e}clais",
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AU - Alekou, A.

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AU - Blebea-Apostu, A. M.

AU - Blondel, A.

AU - Bogomilov, M.

AU - Borriello, Enrico

AU - Boyd, S.

AU - Brancus, I.

AU - Bravar, A.

AU - Buizza-Avanzini, M.

AU - Cafagna, F.

AU - Calin, M.

AU - Calviani, M.

AU - Campanelli, M.

AU - Cantini, C.

AU - Caretta, O.

AU - Cata-Danil, G.

AU - Catanesi, M. G.

AU - Cervera, A.

AU - Chakraborty, S.

AU - Chaussard, L.

AU - Chesneanu, D.

AU - Chipesiu, F.

AU - Christodoulou, G.

AU - Coleman, J.

AU - Crivelli, P.

AU - Davenne, T.

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N2 - 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 magnetized 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 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 > 5 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 CP from the data, the first LBNO phase can convincingly give evidence for CPV on the 3 C.L. using today’s knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.

AB - 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 magnetized 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 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 > 5 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 CP from the data, the first LBNO phase can convincingly give evidence for CPV on the 3 C.L. using today’s knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.

KW - CP violation

KW - Neutrino Detectors and Telescopes

KW - Oscillation

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