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

Author

Collaboration, LAGUNA-LBNO, Agarwalla, S. K., Agostino, L., Aittola, M., Alekou, A., Andrieu, B., Antoniou, F., Asfandiyarov, R., Autiero, D., Bésida, O., Balik, A., Ballett, P., Bandac, I., Banerjee, D., Bartmann, W., Bay, F., Biskup, B., Blebea-Apostu, A. M., Blondel, A., Bogomilov, M., Bolognesi, S., Borriello, E., Brancus, I., Bravar, A., Buizza-Avanzini, M., Caiulo, D., Calin, M., Calviani, M., Campanelli, M., Cantini, C., Cata-Danil, G., Chakraborty, S., Charitonidis, N., Chaussard, L., Chesneanu, D., Chipesiu, F., Crivelli, P., Dawson, J., De Bonis, I., Declais, Y., Sanchez, P. Del Amo, Delbart, A., Di Luise, S., Duchesneau, D., Dumarchez, J., Efthymiopoulos, I., Eliseev, A., Emery, S., Enqvist, T., Enqvist, K., Epprecht, L., Erykalov, A. N., Esanu, T., Franco, D., Friend, M., Galymov, V., Gavrilov, G., Gendotti, A., Giganti, C., Gilardoni, S., Goddard, B., Gomoiu, C. M., Gornushkin, Y. A., Gorodetzky, P., Haesler, A., Hasegawa, T., Horikawa, S., Huitu, K., Izmaylov, A., Jipa, A., Kainulainen, K., Karadzhov, Y., Khabibullin, M., Khotjantsev, A., Kopylov, A. N., Korzenev, A., Kosyanenko, S., Kryn, D., Kudenko, Y., Kuusiniemi, P., Lazanu, I., Lazaridis, C., Levy, J. -M., Loo, K., Maalampi, J., Margineanu, R. M., Marteau, J., Martin-Mari, C., Matveev, V., Mazzucato, E., Mefodiev, A., Mineev, O., Mirizzi, A., Mitrica, B., Murphy, S., Nakadaira, T., Narita, S., Nesterenko, D. A., Nguyen, K., Nikolics, K., Noah, E., Novikov, Yu., Oprima, A., Osborne, J., Ovsyannikova, T., Papaphilippou, Y., Pascoli, S., Patzak, T., Pectu, M., Pennacchio, E., Periale, L., Pessard, H., Popov, B., Ravonel, M., Rayner, M., Resnati, F., Ristea, O., Robert, A., Rubbia, A., Rummukainen, K., Saftoiu, A., Sakashita, K., Sanchez-Galan, F., Sarkamo, J., Saviano, N., Scantamburlo, E., Sergiampietri, F., Sgalaberna, D., Shaposhnikova, E., Slupecki, M., Smargianaki, D., Stanca, D., Steerenberg, R., Sterian, A. R., Sterian, P., Stoica, S., Strabel, C., Suhonen, J., Suvorov, V., Toma, G., Tonazzo, A., Trzaska, W. H., Tsenov, R., Tuominen, K., Valram, M., Vankova-Kirilova, G., Vannucci, F., Vasseur, G., Velotti, F., Velten, P., Venturi, V., Viant, T., Vihonen, S., Vincke, H., Vorobyev, A., Weber, A., Wu, S., Yershov, N., Zambelli, L., and Zito, M.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
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., Comment: 21 pages, 12 figures

Published
2014

2. Optimised sensitivity to leptonic CP violation from spectral information: the LBNO case at 2300 km baseline

Author

Collaboration, LAGUNA-LBNO, Agarwalla, S. K., Agostino, L., Aittola, M., Alekou, A., Andrieu, B., Antoniou, F., Asfandiyarov, R., Autiero, D., Bésida, O., Balik, A., Ballett, P., Bandac, I., Banerjee, D., Bartmann, W., Bay, F., Biskup, B., Blebea-Apostu, A. M., Blondel, A., Bogomilov, M., Bolognesi, S., Borriello, E., Brancus, I., Bravar, A., Buizza-Avanzini, M., Caiulo, D., Calin, M., Calviani, M., Campanelli, M., Cantini, C., Cata-Danil, G., Chakraborty, S., Charitonidis, N., Chaussard, L., Chesneanu, D., Chipesiu, F., Crivelli, P., Dawson, J., De Bonis, I., Declais, Y., Sanchez, P. Del Amo, Delbart, A., Di~Luise, S., Duchesneau, D., Dumarchez, J., Efthymiopoulos, I., Eliseev, A., Emery, S., Enqvist, T., Enqvist, K., Epprecht, L., Erykalov, A. N., Esanu, T., Franco, D., Friend, M., Galymov, V., Gavrilov, G., Gendotti, A., Giganti, C., Gilardoni, S., Goddard, B., Gomoiu, C. M., Gornushkin, Y. A., Gorodetzky, P., Haesler, A., Hasegawa, T., Horikawa, S., Huitu, K., Izmaylov, A., Jipa, A., Kainulainen, K., Karadzhov, Y., Khabibullin, M., Khotjantsev, A., Kopylov, A. N., Korzenev, A., Kosyanenko, S., Kryn, D., Kudenko, Y., Kuusiniemi, P., Lazanu, I., Lazaridis, C., Levy, J. -M., Loo, K., Maalampi, J., Margineanu, R. M., Marteau, J., Martin-Mari, C., Matveev, V., Mazzucato, E., Mefodiev, A., Mineev, O., Mirizzi, A., Mitrica, B., Murphy, S., Nakadaira, T., Narita, S., Nesterenko, D. A., Nguyen, K., Nikolics, K., Noah, E., Novikov, Yu., Oprima, A., Osborne, J., Ovsyannikova, T., Papaphilippou, Y., Pascoli, S., Patzak, T., Pectu, M., Pennacchio, E., Periale, L., Pessard, H., Popov, B., Ravonel, M., Rayner, M., Resnati, F., Ristea, O., Robert, A., Rubbia, A., Rummukainen, K., Saftoiu, A., Sakashita, K., Sanchez-Galan, F., Sarkamo, J., Saviano, N., Scantamburlo, E., Sergiampietri, F., Sgalaberna, D., Shaposhnikova, E., Slupecki, M., Smargianaki, D., Stanca, D., Steerenberg, R., Sterian, A. R., Sterian, P., Stoica, S., Strabel, C., Suhonen, J., Suvorov, V., Toma, G., Tonazzo, A., Trzaska, W. H., Tsenov, R., Tuominen, K., Valram, M., Vankova-Kirilova, G., Vannucci, F., Vasseur, G., Velotti, F., Velten, P., Venturi, V., Viant, T., Vihonen, S., Vincke, H., Vorobyev, A., Weber, A., Wu, S., Yershov, N., Zambelli, L., and Zito, M.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment
Abstract

One of the main goals of the Long Baseline Neutrino Observatory (LBNO) is to study the $L/E$ behaviour (spectral information) of the electron neutrino and antineutrino appearance probabilities, in order to determine the unknown CP-violation phase $\delta_{CP}$ 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., Comment: 25 pages, 20 figures

Published
2014

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

Author

Collaboration, LAGUNA-LBNO, Agarwalla, S. K., Agostino, L., Aittola, M., Alekou, A., Andrieu, B., Angus, D., Antoniou, F., Ariga, A., Ariga, T., Asfandiyarov, R., Autiero, D., Ballett, P., Bandac, I., Banerjee, D., Barker, G. J., Barr, G., Bartmann, W., Bay, F., Berardi, V., Bertram, I., Bésida, O., Blebea-Apostu, A. M., Blondel, A., Bogomilov, M., Borriello, E., Boyd, S., Brancus, I., Bravar, A., Buizza-Avanzini, M., Cafagna, F., Calin, M., Calviani, M., Campanelli, M., Cantini, C., Caretta, O., Cata-Danil, G., Catanesi, M. G., Cervera, A., Chakraborty, S., Chaussard, L., Chesneanu, D., Chipesiu, F., Christodoulou, G., Coleman, J., Crivelli, P., Davenne, T., Dawson, J., De Bonis, I., De Jong, J., Déclais, Y., Sanchez, P. Del Amo, Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Duchesneau, D., Dumarchez, J., Efthymiopoulos, I., Eliseev, A., Emery, S., Enqvist, K., Enqvist, T., Epprecht, L., Ereditato, A., Erykalov, A. N., Esanu, T., Finch, A. J., Fitton, M. D., Franco, D., Galymov, V., Gavrilov, G., Gendotti, A., Giganti, C., Goddard, B., Gomez, J. J., Gomoiu, C. M., Gornushkin, Y. A., Gorodetzky, P., Grant, N., Haesler, A., Haigh, M. D., Hasegawa, T., Haug, S., Hierholzer, M., Hissa, J., Horikawa, S., Huitu, K., Ilic, J., Ioannisian, A. N., Izmaylov, A., Jipa, A., Kainulainen, K., Kalliokoski, T., Karadzhov, Y., Kawada, J., Khabibullin, M., Khotjantsev, A., Kokko, E., Kopylov, A. N., Kormos, L. L., Korzenev, A., Kosyanenko, S., Kreslo, I., Kryn, D., Kudenko, Y., Kudryavtsev, V. A., Kumpulainen, J., Kuusiniemi, P., Lagoda, J., Lazanu, I., Levy, J. -M., Litchfield, R. P., Loo, K., Loveridge, P., Maalampi, J., Magaletti, L., Margineanu, R. M., Marteau, J., Martin-Mari, C., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., Mercadante, A., Mineev, O., Mirizzi, A., Mitrica, B., Morgan, B., Murdoch, M., Murphy, S., Mursula, K., Narita, S., Nesterenko, D. A., Nguyen, K., Nikolics, K., Noah, E., Novikov, Yu., O'Keeffe, H., Odell, J., Oprima, A., Palladino, V., Papaphilippou, Y., Pascoli, S., Patzak, T., Payne, D., Pectu, M., Pennacchio, E., Periale, L., Pessard, H., Pistillo, C., Popov, B., Przewlocki, P., Quinto, M., Radicioni, E., Ramachers, Y., Ratoff, P. N., Ravonel, M., Rayner, M., Resnati, F., Ristea, O., Robert, A., Rondio, E., Rubbia, A., Rummukainen, K., Sacco, R., Saftoiu, A., Sakashita, K., Sarkamo, J., Sato, F., Saviano, N., Scantamburlo, E., Sergiampietri, F., Sgalaberna, D., Shaposhnikova, E., Slupecki, M., Sorel, M., Spooner, N. J. C., Stahl, A., Stanca, D., Steerenberg, R., Sterian, A. R., Sterian, P., Still, B., Stoica, S., Strauss, T., Suhonen, J., Suvorov, V., Szeptycka, M., Terri, R., Thompson, L. F., Toma, G., Tonazzo, A., Touramanis, C., Trzaska, W. H., Tsenov, R., Tuominen, K., Vacheret, A., Valram, M., Vankova-Kirilova, G., Vanucci, F., Vasseur, G., Velotti, F., Velten, P., Viant, T., Vincke, H., Virtanen, A., Vorobyev, A., Wark, D., Weber, A., Weber, M., Wiebusch, C., Wilson, J. R., Wu, S., Yershov, N., Zalipska, J., and Zito, M.

Subjects
High Energy Physics - Phenomenology
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 magnetised iron calorimeter, situated at 2300 km from CERN and a near detector based on a high-pressure 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 $\delta_{CP}$ 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 $>5\sigma$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 $\sim$ 100% probability to determine the MH in at most 4-5 years of running. Since the knowledge of MH is indispensable to extract $\delta_{CP}$ from the data, the first LBNO phase can convincingly give evidence for CPV on the $3\sigma$C.L. using today's knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties., Comment: 35 pages, 22 figures, added authors

Published
2013

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

Author

Weber, A and others), LAGUNA-LBNO Collaboration (158

Abstract

The proposed Long Baseline Neutrino Observatory (LBNO) initially consists of ~ 20 kton liquid double phase TPC complemented by a magnetised iron calorimeter, to be installed at the Pyhäsalmi 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 δCP 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 3σ for 50% of the true values of δCP with a 20 kton detector. With a far detector of 70 kton, the combination allows a 3σ sensitivity for 75% of the true values of δCP 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.

Published
2016

5. Optimised sensitivity to leptonic CP violation from spectral information: the LBNO case at 2300 km baseline

Author

Weber, A and Collaboration, LAGUNA-LBNO

Abstract

One of the main goals of the Long Baseline Neutrino Observatory (LBNO) is to study the L/E behaviour (spectral information) of the electron neutrino and antineutrino appearance probabilities, in order to determine the unknown CP-violation phase δCP 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 the 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.

Published
2016

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

Author

LAGUNA-LBNO Collaboration, Agarwalla, S.K, Banerjee, Daipayan, Bay, Francesca, Cantini, Cosimo, Crivelli, Paolo, Di Luise, Silvestro, Epprecht, Lukas, Gendotti, Adamo, Horikawa, Sosuke, Murphy, Sébastien, Nguyen, Khoi N., Nikolics, K., Periale, Luciano, Resnati, Filippo, Rubbia, André, Sgalaberna, Davide, Viant, Thierry, and Wu, S.

Subjects
Oscillation, Neutrino Detectors and Telescopes, CP violation
Abstract

Journal of High Energy Physics, 2014 (5), ISSN:1126-6708, ISSN:1029-8479

Published
2014

7. Recent R&D results on LAr LEM TPC and plans for LBNO demonstrators

Author

S. Horikawa, S. Wu, Filippo Resnati, André Rubbia, C. Cantini, A. Gendotti, Laguna-Lbno, L. Periale, T. Viant, L. Epprecht, F. Sergiampietri, G. Natterer, C. Regenfus, and S. Murphy

Subjects
Physics, History, Time projection chamber, Large Hadron Collider, Physics::Instrumentation and Detectors, Detector, Particle detector, Computer Science Applications, Education, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Detectors and Experimental Techniques, Neutrino, Neutrino oscillation, Lepton
Abstract

The double phase Liquid Argon (LAr) Time Projection Chamber (TPC) is the state-of-art technology for neutrino detection thanks to its superb 3 Dimensional (3D) tracking and calorimetry performance. Based on this technology, the Giant Liquid Argon Charge Imaging ExpeRiment (GLACIER) is proposed to be the far detector for the Long Baseline Neutrino Oscillation (LBNO) experiment aiming at studying neutrinos 2300 km away from their production point. We report recent R&D results on the charge readout system for GLACIER and the plans to build the GLACIER demonstrators at CERN., Journal of Physics: Conference Series, 650, ISSN:1742-6588, ISSN:1742-6596

Published
2015
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9. The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment

Author

Agarwalla, S. K., Agostino, L., Aittola, M., Alekou, A., Andrieu, B., Angus, D., Antoniou, F., Ariga, A., Ariga, T., Asfandiyarov, R., Autiero, D., Ballett, P., Bandac, I., Banerjee, D., Barker, G. J., Barr, G., Bartmann, W., Bay, F., Berardi, V., Bertram, I., Besida, O., Blebea-Apostu, A. M., Blondel, A., Bogomilov, M., Borriello, E., Boyd, S., Brancus, I., Bravar, A., Buizza-Avanzini, M., Cafagna, F., Calin, M., Calviani, M., Campanelli, M., Cantini, C., Caretta, O., Cata-Danil, G., Catanesi, M. G., Cervera, A., Chakraborty, S., Chaussard, L., Chesneanu, D., Chipesiu, F., Christodoulou, G., Coleman, J., Crivelli, P., Davenne, T., Dawson, J., De Bonis, I., De Jong, J., Declais, Y., Del Amo Sanchez, P., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Duchesneau, D., Dumarchez, J., Efthymiopoulos, I., Eliseev, A., Emery, S., Enqvist, K., Enqvist, T., Epprecht, L., Ereditato, A., Erykalov, A. N., Esanu, T., Finch, A. J., Fitton, M. D., Franco, D., Galymov, V., Gavrilov, G., Gendotti, A., Giganti, C., Goddard, B., Gomez, J. J., Gomoiu, C. M., Gornushkin, Y. A., Gorodetzky, P., Grant, N., Haesler, A., Haigh, M. D., Hasegawa, T., Haug, S., Hierholzer, M., Hissa, J., Horikawa, S., Huitu, K., Ilic, J., Ioannisian, A. N., Izmaylov, A., Jipa, A., Kainulainen, K., Kalliokoski, T., Karadzhov, Y., Kawada, J., Khabibullin, M., Khotjantsev, A., Kokko, E., Kopylov, A. N., Kormos, L. L., Korzenev, A., Kosyanenko, S., Kreslo, I., Kryn, D., Kudenko, Y., Kudryavtsev, V. A., Kumpulainen, J., Kuusiniemi, P., Lagoda, J., Lazanu, I., Levy, J.-M., Litchfield, R. P., Loo, K., Loveridge, P., Maalampi, J., Magaletti, L., Margineanu, R. M., Marteau, J., Martin-Mari, C., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., Mercadante, A., Mineev, O., Mirizzi, A., Mitrica, B., Morgan, B., Murdoch, M., Murphy, S., Mursula, K., Narita, S., Nesterenko, D. A., Nguyen, K., Nikolics, K., Noah, E., Novikov, Yu., O'Keeffe, H., Odell, J., Oprima, A., Palladino, V., Papaphilippou, Y., Pascoli, S., Patzak, T., Payne, D., Pectu, M., Pennacchio, E., Periale, L., Pessard, H., Pistillo, C., Popov, B., Przewlocki, P., Quinto, M., Radicioni, E., Ramachers, Y., Ratoff, P. N., Ravonel, M., Rayner, M., Resnati, F., Ristea, O., Robert, A., Rondio, E., Rubbia, A., Rummukainen, K., Sacco, R., Saftoiu, A., Sakashita, K., Sarkamo, J., Sato, F., Saviano, N., Scantamburlo, E., Sergiampietri, F., Sgalaberna, D., Shaposhnikova, E., Slupecki, M., Sorel, M., Spooner, N. J. C., Stahl, Achim, Stanca, D., Steerenberg, R., Sterian, A. R., Sterian, P., Still, B., Stoica, S., Strauss, T., Suhonen, J., Suvorov, V., Szeptycka, M., Terri, R., Thompson, L. F., Toma, G., Tonazzo, A., Touramanis, C., Trzaska, W. H., Tsenov, R., Tuominen, K., Vacheret, A., Valram, M., Vankova-Kirilova, G., Vanucci, F., Vasseur, G., Velotti, F., Velten, P., Viant, T., Vincke, H., Virtanen, A., Vorobyev, A., Wark, D., Weber, A., Weber, Martin, Wiebusch, C., Wilson, J. R., Wu, S., Yershov, N., Zalipska, J., Zito, M., and LAGUNA-LBNO Collaboration

Subjects
13. Climate action, 7. Clean energy
Abstract

4th International Conference on Applied Human Factors and Ergonomics (AHFE) 2012 : [21 - 25 July 2012; proceedings] / [ed. Gavriel Salvendy ...] ; [6]. Advances in ergonomics in manufacturing / ed. by Stefan Trzcielinski and Waldemar Karwowski; Boca Raton, Fla. [u.a.] : CRC Press, Advances in human factors and ergonomics series, (2013). doi:10.1007/JHEP05(2014)094, Published by CRC Press, Boca Raton, Fla. [u.a.]

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

Author

LAGUNA-LBNO Collaboration, S. K. Agarwalla, L. Agostino, M. Aittola, A. Alekou, B. Andrieu, D. Angus, F. Antoniou, A. Ariga, T. Ariga, R. Asfandiyarov, D. Autiero, P. Ballett, I. Bandac, D. Banerjee, G. J. Barker, G. Barr, W. Bartmann, F. Bay, V. Berardi, I. Bertram, O. Bésida, A. M. Blebea-Apostu, A. Blondel, M. Bogomilov, E. Borriello, S. Boyd, I. Brancus, A. Bravar, M. Buizza-Avanzini, F. Cafagna, M. Calin, M. Calviani, M. Campanelli, C. Cantini, O. Caretta, G. Cata-Danil, M. G. Catanesi, A. Cervera, S. Chakraborty, L. Chaussard, D. Chesneanu, F. Chipesiu, G. Christodoulou, J. Coleman, P. Crivelli, T. Davenne, J. Dawson, I. De Bonis, J. De Jong, Y. Déclais, P. Del Amo Sanchez, A. Delbart, C. Densham, F. Di Lodovico, S. Di Luise, D. Duchesneau, J. Dumarchez, I. Efthymiopoulos, A. Eliseev, S. Emery, K. Enqvist, T. Enqvist, L. Epprecht, A. Ereditato, A. N. Erykalov, T. Esanu, A. J. Finch, M. D. Fitton, D. Franco, V. Galymov, G. Gavrilov, A. Gendotti, C. Giganti, B. Goddard, J. J. Gomez, C. M. Gomoiu, Y. A. Gornushkin, P. Gorodetzky, N. Grant, A. Haesler, M. D. Haigh, T. Hasegawa, S. Haug, M. Hierholzer, J. Hissa, S. Horikawa, K. Huitu, J. Ilic, A. N. Ioannisian, A. Izmaylov, A. Jipa, K. Kainulainen, T. Kalliokoski, Y. Karadzhov, J. Kawada, M. Khabibullin, A. Khotjantsev, E. Kokko, A. N. Kopylov, L. L. Kormos, A. Korzenev, S. Kosyanenko, I. Kreslo, D. Kryn, Y. Kudenko, V. A. Kudryavtsev, J. Kumpulainen, P. Kuusiniemi, J. Lagoda, I. Lazanu, J. -M. Levy, R. P. Litchfield, K. Loo, P. Loveridge, J. Maalampi, L. Magaletti, R. M. Margineanu, J. Marteau, C. Martin-Mari, V. Matveev, K. Mavrokoridis, E. Mazzucato, N. McCauley, A. Mercadante, O. Mineev, A. Mirizzi, B. Mitrica, B. Morgan, M. Murdoch, S. Murphy, K. Mursula, S. Narita, D. A. Nesterenko, K. Nguyen, K. Nikolics, E. Noah, Yu. Novikov, H. O'Keeffe, J. Odell, A. Oprima, V. Palladino, Y. Papaphilippou, S. Pascoli, T. Patzak, D. Payne, M. Pectu, E. Pennacchio, L. Periale, H. Pessard, C. Pistillo, B. Popov, P. Przewlocki, M. Quinto, E. Radicioni, Y. Ramachers, P. N. Ratoff, M. Ravonel, M. Rayner, F. Resnati, O. Ristea, A. Robert, E. Rondio, A. Rubbia, K. Rummukainen, R. Sacco, A. Saftoiu, K. Sakashita, J. Sarkamo, F. Sato, N. Saviano, E. Scantamburlo, F. Sergiampietri, D. Sgalaberna, E. Shaposhnikova, M. Slupecki, M. Sorel, N. J. C. Spooner, A. Stahl, D. Stanca, R. Steerenberg, A. R. Sterian, P. Sterian, B. Still, S. Stoica, T. Strauss, J. Suhonen, V. Suvorov, M. Szeptycka, R. Terri, L. F. Thompson, G. Toma, A. Tonazzo, C. Touramanis, W. H. Trzaska, R. Tsenov, K. Tuominen, A. Vacheret, M. Valram, G. Vankova-Kirilova, F. Vanucci, G. Vasseur, F. Velotti, P. Velten, T. Viant, H. Vincke, A. Virtanen, A. Vorobyev, D. Wark, A. Weber, M. Weber, C. Wiebusch, J. R. Wilson, S. Wu, N. Yershov, J. Zalipska, and M. Zito

Subjects
Physics::Instrumentation and Detectors, 13. Climate action, 7. Clean energy
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 magnetised iron calorimeter, situated at 2300 km from CERN and a near detector based on a high-pressure 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 $\delta_{CP}$ 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 $>5\sigma$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 $\sim$ 100% probability to determine the MH in at most 4-5 years of running. Since the knowledge of MH is indispensable to extract $\delta_{CP}$ from the data, the first LBNO phase can convincingly give evidence for CPV on the $3\sigma$C.L. using today's knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.

15. The LAGUNA-LBNO neutrino observatory in Europe

Author

Vyacheslav Galymov, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and LAGUNA-LBNO

Subjects
Nuclear and High Energy Physics, Particle physics, Proton decay, Physics::Instrumentation and Detectors, 01 natural sciences, 7. Clean energy, Nuclear physics, Observatory, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, Neutrino oscillation, Physics, mass hierarchy, Large Hadron Collider, 010308 nuclear & particles physics, liquid argon TPC, Detector, Solar neutrino problem, leptonic CP violation, High Energy Physics::Experiment, Neutrino, Electron neutrino, Particle Physics - Experiment, long baseline neutrino oscillations
Abstract

The LAGUNA and LAGUNA-LBNO consortia have performed two detailed design studies from 2008 to 2014 to define the optimal combination of baseline and detector technology for the next generation neutrino observatory. Starting from seven sites and three detector technologies the options have been prioritized with the primary choice given to the Pyhasalmi mine in Finland and the liquid Argon (DLAr) TPC detector technology. This led to a proposal for a European-based next-generation long baseline oscillation experiment, LBNO. The deep underground location of 1400 m offered by the mine is essential to explore neutrino astrophysics and look for proton decay. The mine position at 2300 km from CERN allows quickly to resolve neutrino mass hierarchy and measure leptonic CPV phase δ C P by disentangling the matter effects from those caused by CPV. We will demonstrate the capability of LBNO to discover the mass hierarchy at the > 5 σ level within 4 years of operation using a 20 kt DLAr detector and a conventional neutrino beam created with a 400 GeV 750 kW primary proton beam delivered by CERN SPS. Following the discovery of the mass hierarchy LBNO will pursue the determination of the CP-violating phase δ C P . We will show the LBNO sensitivity to measure δ C P by studying the shape of the electron neutrino appearance oscillation probability over a broad energy range covering both the 1st and 2nd ν e appearance maxima.

Published
2016
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