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On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments

Superbeam experiments can, in principle, achieve impressive sensitivities for CP violation in neutrino oscillations for large $\theta_{13}$. We study how those sensitivities depend on assumptions about systematical uncertainties. We focus on the second phase of T2K, the so-called T2HK experiment, an...

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Detalles Bibliográficos
Autores principales: Huber, Patrick, Mezzetto, Mauro, Schwetz, Thomas
Lenguaje:eng
Publicado: 2007
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2008/03/021
http://cds.cern.ch/record/1070206
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author Huber, Patrick
Mezzetto, Mauro
Schwetz, Thomas
author_facet Huber, Patrick
Mezzetto, Mauro
Schwetz, Thomas
author_sort Huber, Patrick
collection CERN
description Superbeam experiments can, in principle, achieve impressive sensitivities for CP violation in neutrino oscillations for large $\theta_{13}$. We study how those sensitivities depend on assumptions about systematical uncertainties. We focus on the second phase of T2K, the so-called T2HK experiment, and we explicitly include a near detector in the analysis. Our main result is that even an idealised near detector cannot remove the dependence on systematical uncertainties completely. Thus additional information is required. We identify certain combinations of uncertainties, which are the key to improve the sensitivity to CP violation, for example the ratio of electron to muon neutrino cross sections and efficiencies. For uncertainties on this ratio larger than 2%, T2HK is systematics dominated. We briefly discuss how our results apply to a possible two far detector configuration, called T2KK. We do not find a significant advantage with respect to the reduction of systematical errors for the measurement of CP violation for this setup.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-10702062021-09-17T02:54:41Zdoi:10.1088/1126-6708/2008/03/021http://cds.cern.ch/record/1070206engHuber, PatrickMezzetto, MauroSchwetz, ThomasOn the impact of systematical uncertainties for the CP violation measurement in superbeam experimentsParticle Physics - PhenomenologySuperbeam experiments can, in principle, achieve impressive sensitivities for CP violation in neutrino oscillations for large $\theta_{13}$. We study how those sensitivities depend on assumptions about systematical uncertainties. We focus on the second phase of T2K, the so-called T2HK experiment, and we explicitly include a near detector in the analysis. Our main result is that even an idealised near detector cannot remove the dependence on systematical uncertainties completely. Thus additional information is required. We identify certain combinations of uncertainties, which are the key to improve the sensitivity to CP violation, for example the ratio of electron to muon neutrino cross sections and efficiencies. For uncertainties on this ratio larger than 2%, T2HK is systematics dominated. We briefly discuss how our results apply to a possible two far detector configuration, called T2KK. We do not find a significant advantage with respect to the reduction of systematical errors for the measurement of CP violation for this setup.Superbeam experiments can, in principle, achieve impressive sensitivities for CP violation in neutrino oscillations for large $\theta_{13}$. We study how those sensitivities depend on assumptions about systematical uncertainties. We focus on the second phase of T2K, the so-called T2HK experiment, and we explicitly include a near detector in the analysis. Our main result is that even an idealised near detector cannot remove the dependence on systematical uncertainties completely. Thus additional information is required. We identify certain combinations of uncertainties, which are the key to improve the sensitivity to CP violation, for example the ratio of electron to muon neutrino cross sections and efficiencies. For uncertainties on this ratio larger than 2%, T2HK is systematics dominated. We briefly discuss how our results apply to a possible two far detector configuration, called T2KK. We do not find a significant advantage with respect to the reduction of systematical errors for the measurement of CP violation for this setup.arXiv:0711.2950CERN-PH-TH-2007-227VPI-IPNAS-07-09CERN-PH-TH-2007-227VPI-IPNAS-07-09oai:cds.cern.ch:10702062007-11-20
spellingShingle Particle Physics - Phenomenology
Huber, Patrick
Mezzetto, Mauro
Schwetz, Thomas
On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
title On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
title_full On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
title_fullStr On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
title_full_unstemmed On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
title_short On the impact of systematical uncertainties for the CP violation measurement in superbeam experiments
title_sort on the impact of systematical uncertainties for the cp violation measurement in superbeam experiments
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/2008/03/021
http://cds.cern.ch/record/1070206
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