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210 results on '"Carlile, C. J."'

1. Exploring atmospheric neutrino oscillations at ESSnuSB

Author

ESSnuSB, Aguilar, J., Anastasopoulos, M., Baussan, E., Bhattacharyya, A. K., Bignami, A., Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Bramati, F., Branca, A., Brunetti, G., Bustinduy, I., Carlile, C. J., Cederkall, J., Choi, T. W., Choubey, S., Christiansen, P., Collins, M., Morales, E. Cristaldo, Cupiał, P., Danared, H., de André, J. P. A. M., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fasoula, E., Fukuda, T., Gazis, N., Geralis, Th., Ghosh, M., Giarnetti, A., Gokbulut, G., Hagner, C., Halić, L., Hooft, M., Iversen, K. E., Jachowicz, N., Jenssen, M., Johansson, R., Kasimi, E., Topaksu, A. Kayis, Kildetof, B., Kordas, K., Leisos, A., Lindroos, M., Longhin, A., Maiano, C., Marangoni, S., Marrelli, C., Meloni, D., Mezzetto, M., Milas, N., Muñoz, J., Niewczas, K., Oglakci, M., Ohlsson, T., Olvegård, M., Pari, M., Patrzalek, D., Petkov, G., Petridou, Ch., Poussot, P., Psallidas, A., Pupilli, F., Saiang, D., Sampsonidis, D., Schwab, C., Sordo, F., Sosa, A., Stavropoulos, G., Tarkeshian, R., Terranova, F., Tolba, T., Trachanas, E., Tsenov, R., Tsirigotis, A., Tzamarias, S. E., Vankova-Kirilova, G., Vassilopoulos, N., Vihonen, S., Wurtz, J., Zeter, V., and Zormpa, O.

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

This study provides an analysis of atmospheric neutrino oscillations at the ESSnuSB far detector facility. The prospects of the two cylindrical Water Cherenkov detectors with a total fiducial mass of 540 kt are investigated over 10 years of data taking in the standard three-flavor oscillation scenario. We present the confidence intervals for the determination of mass ordering, $\theta_{23}$ octant as well as for the precisions on $\sin^2\theta_{23}$ and $|\Delta m_{31}^2|$. It is shown that mass ordering can be resolved by $3\sigma$ CL ($5\sigma$ CL) after 4 years (10 years) regardless of the true neutrino mass ordering. Correspondingly, the wrong $\theta_{23}$ octant could be excluded by $3\sigma$ CL after 4 years (8 years) in the case where the true neutrino mass ordering is normal ordering (inverted ordering). The results presented in this work are complementary to the accelerator neutrino program in the ESSnuSB project., Comment: 14 pages, 7 figures and 2 tables, accepted for publication in the Journal of High Energy Physics

Published
2024

2. Decoherence in Neutrino Oscillation at the ESSnuSB Experiment

Author

ESSnuSB, Aguilar, J., Anastasopoulos, M., Baussan, E., Bhattacharyya, A. K., Bignami, A., Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Bramati, F., Branca, A., Brunetti, G., Bustinduy, I., Carlile, C. J., Cederkall, J., Choi, T. W., Choubey, S., Christiansen, P., Collins, M., Morales, E. Cristaldo, Cupiał, P., Danared, H., Dancila, D., de André, J. P. A. M., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fasoula, E., Fukuda, T., Gazis, N., Geralis, Th., Ghosh, M., Giarnetti, A., Gokbulut, G., Gupta, A., Hagner, C., Halić, L., Hariharan, V. T., Hooft, M., Iversen, K. E., Jachowicz, N., Jenssen, M., Johansson, R., Kasimi, E., Topaksu, A. Kayis, Kildetof, B., Kliček, B., Kordas, K., Leisos, A., Lindroos, M., Longhin, A., Maiano, C., Majumdar, D., Marangoni, S., Marrelli, C., Martins, C., Meloni, D., Mezzetto, M., Milas, N., Muñoz, J., Niewczas, K., Oglakci, M., Ohlsson, T., Olvegård, M., Pari, M., Patrzalek, D., Petkov, G., Petridou, Ch., Poussot, P., Psallidas, A., Pupilli, F., Saiang, D., Sampsonidis, D., Schwab, C., Sordo, F., Sosa, A., Stavropoulos, G., Stipčević, M., Tarkeshian, R., Terranova, F., Tolba, T., Trachanas, E., Tsenov, R., Tsirigotis, A., Tzamarias, S. E., Vankova-Kirilova, G., Vassilopoulos, N., Vihonen, S., Wurtz, J., Zeter, V., Zormpa, O., and Zou, Y.

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

Neutrino oscillation experiments provide a unique window in exploring several new physics scenarios beyond the standard three flavour. One such scenario is quantum decoherence in neutrino oscillation which tends to destroy the interference pattern of neutrinos reaching the far detector from the source. In this work, we study the decoherence in neutrino oscillation in the context of the ESSnuSB experiment. We consider the energy-independent decoherence parameter and derive the analytical expressions for P$_{\mu e}$ and P$_{\mu \mu}$ probabilities in vacuum. We have computed the capability of ESSnuSB to put bounds on the decoherence parameters namely, $\Gamma_{21}$ and $\Gamma_{32}$ and found that the constraints on $\Gamma_{21}$ are competitive compared to the DUNE bounds and better than the most stringent LBL ones from MINOS/MINOS+. We have also investigated the impact of decoherence on the ESSnuSB measurement of the Dirac CP phase $\delta_{\rm CP}$ and concluded that it remains robust in the presence of new physics., Comment: 30 pages, 9 figures, 2 tables, Version accepted for publication in JHEP

Published
2024
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3. Study of non-standard interaction mediated by a scalar field at ESSnuSB experiment

Author

ESSnuSB, Aguilar, J., Anastasopoulos, M., Baussan, E., Bhattacharyya, A. K., Bignami, A., Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Bramati, F., Branca, A., Brorsson, W., Bustinduy, I., Carlile, C. J., Cederkall, J., Choi, T. W., Choubey, S., Christiansen, P., Collins, M., Morales, E. Cristaldo, Danared, H., Dancila, D., de André, J. P. A. M., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fasoula, E., Fukuda, T., Gazis, N., Geralis, Th., Ghosh, M., Giarnetti, A., Gokbulut, G., Hagner, C., Halić, L., Hariharan, V. T., Iversen, K. E., Jenssen, M., Johansson, R., Kasimi, E., Topaksu, A. Kayis, Kildetof, B., Kliček, B., Kordas, K., Leisos, A., Lindroos, M., Longhin, A., Maiano, C., Marangoni, S., Marrelli, C., Martins, C., Meloni, D., Mezzetto, M., Milas, N., Muñoz, J., Oglakci, M., Ohlsson, T., Olvegård, M., Pari, M., Patrzalek, D., Petkov, G., Petridou, Ch., Poussot, P., Psallidas, A., Pupilli, F., Raikwal, D., Saiang, D., Sampsonidis, D., Schwab, C., Sordo, F., Sosa, A., Stavropoulos, G., Stipčević, M., Tarkeshian, R., Terranova, F., Tolba, T., Trachanas, E., Tsenov, R., Tsirigotis, A., Tzamarias, S. E., Vankova-Kirilova, G., Vassilopoulos, N., Vihonen, S., Wurtz, J., Zeter, V., Zormpa, O., and Zou, Y.

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

In this paper we study non-standard interactions mediated by a scalar field (SNSI) in the context of ESSnuSB experiment. In particular we study the capability of ESSnuSB to put bounds on the SNSI parameters and also study the impact of SNSI in the measurement of the leptonic CP phase $\delta_{\rm CP}$. Existence of SNSI modifies the neutrino mass matrix and this modification can be expressed in terms of three diagonal real parameters ($\eta_{ee}$, $\eta_{\mu\mu}$ and $\eta_{\tau\tau}$) and three off-diagonal complex parameters ($\eta_{e \mu}$, $\eta_{e\tau}$ and $\eta_{\mu\tau}$). Our study shows that the upper bounds on the parameters $\eta_{\mu\mu}$, $\eta_{\tau\tau}$ and $\eta_{\mu\tau}$ depend upon how $\Delta m^2_{31}$ is minimized in the theory. However, this is not the case when one tries to measure the impact of SNSI on $\delta_{\rm CP}$. Further, we show that the CP sensitivity of ESSnuSB can be completely lost for certain values of $\eta_{ee}$ and $\eta_{\mu\tau}$ for which the appearance channel probability becomes independent of $\delta_{\rm CP}$., Comment: 14 pages, 6 figures, 2 tables, Version accepted for publication in Phys. Rev. D

Published
2023

4. Exploring atmospheric neutrino oscillations at ESSnuSB

Author

Aguilar, J., Anastasopoulos, M., Baussan, E., Bhattacharyya, A. K., Bignami, A., Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Bramati, F., Branca, A., Brunetti, G., Bustinduy, I., Carlile, C. J., Cederkall, J., Choi, T. W., Choubey, S., Christiansen, P., Collins, M., Cristaldo Morales, E., Cupiał, P., Danared, H., de André, J. P. A. M., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fasoula, E., Fukuda, T., Gazis, N., Geralis, Th., Ghosh, M., Giarnetti, A., Gokbulut, G., Hagner, C., Halić, L., Hooft, M., Iversen, K. E., Jachowicz, N., Jenssen, M., Johansson, R., Kasimi, E., Kayis Topaksu, A., Kildetoft, B., Kordas, K., Leisos, A., Lindroos, M., Longhin, A., Maiano, C., Marangoni, S., Marrelli, C., Meloni, D., Mezzetto, M., Milas, N., Muñoz, J. L., Niewczas, K., Oglakci, M., Ohlsson, T., Olvegård, M., Pari, M., Patrzalek, D., Petkov, G., Petridou, Ch., Poussot, P., Psallidas, A., Pupilli, F., Saiang, D., Sampsonidis, D., Schwab, C., Sordo, F., Sosa, A., Stavropoulos, G., Tarkeshian, R., Terranova, F., Tolba, T., Trachanas, E., Tsenov, R., Tsirigotis, A., Tzamarias, S. E., Vankova-Kirilova, G., Vassilopoulos, N., Vihonen, S., Wurtz, J., Zeter, V., and Zormpa, O.

Published
2024
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5. The ESSnuSB design study: overview and future prospects

Author

ESSnuSB Collaboration, Alekou, A., Baussan, E., Bhattacharyya, A. K., Kraljevic, N. Blaskovic, Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Bramati, F., Branca, A., Buchan, O., Burgman, A., Carlile, C. J., Cederkall, J., Choubey, S., Christiansen, P., Collins, M., Morales, E. Cristaldo, D'Alessi, L., Danared, H., Dancila, D., de André, J. P. A. M., Delahaye, J. P., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Folsom, B., Fukuda, T., Gazis, N., Gålnander, B., Geralis, Th., Ghosh, M., Giarnetti, A., Gokbulut, G., Halić, L., Jenssen, M., Johansson, R., Topaksu, A. Kayis, Kildetoft, B., Kliček, B., Kozioł, M., Krhač, K., Łacny, Ł., Lindroos, M., Longhin, A., Maiano, C., Marangoni, S., Marrelli, C., Martins, C., Meloni, D., Mezzetto, M., Milas, N., Oglakci, M., Ohlsson, T., Olvegård, M., Ota, T., Pari, M., Park, J., Patrzalek, D., Petkov, G., Poussot, P., Pupilli, F., Rosauro-Alcaraz, S., Saiang, D., Snamina, J., Sosa, A., Stavropoulos, G., Stipčević, M., Szybiński, B., Tarkeshian, R., Terranova, F., Thomas, J., Tolba, T., Trachanas, E., Tsenov, R., Vankova-Kirilova, G., Vassilopoulos, N., Wildner, E., Wurtz, J., Zormpa, O., and Zou, Y.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

ESSnuSB is a design study for an experiment to measure the CP violation in the leptonic sector at the second neutrino oscillation maximum using a neutrino beam driven by the uniquely powerful ESS linear accelerator. The reduced impact of systematic errors on sensitivity at the second maximum allows for a very precise measurement of the CP violating parameter. This review describes the fundamental advantages of measurement at the 2nd maximum, the necessary upgrades to the ESS linac in order to produce a neutrino beam, the near and far detector complexes, the expected physics reach of the proposed ESSnuSB experiment, concluding with the near future developments aimed at the project realization., Comment: 19 pages, 12 figures; Final version after review by the Universe journal

Published
2023
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6. Particle Physics at the European Spallation Source

Author

Abele, H., Alekou, A., Algora, A., Andersen, K., Baessler, S., Barron-Palos, L., Barrow, J., Baussan, E., Bentley, P., Berezhiani, Z., Bessler, Y., Bhattacharyya, A. K., Bianchi, A., Bijnens, J., Blanco, C., Kraljevic, N. Blaskovic, Blennow, M., Bodek, K., Bogomilov, M., Bohm, C., Bolling, B., Bouquerel, E., Brooijmans, G., Broussard, L. J., Buchan, O., Burgman, A., Calen, H., Carlile, C. J., Cederkall, J., Chanel, E., Christiansen, P., Cirigliano, V., Collar, J. I., Collins, M., Crawford, C. B., Morales, E. Cristaldo, Cupial, P., D'Alessi, L., Damian, J. I. M., Danared, H., Dancila, D., de Andre, J. P. A. M., Delahaye, J. P., Degenkolb, S., Di Julio, D. D., Dracos, M., Dunne, K., Efthymiopoulos, I., Ekelof, T., Eklund, L., Eshraqi, M., Esteban, I., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Ferreira, M. J., Fertl, M., Fierlinger, P., Folsom, B., Frank, A., Fratangelo, A., Friman-Gayer, U., Fukuda, T., Fynbo, H . O . U., Sosa, A. Garcia, Gazis, N., Galnander, B., Geralis, Th., Ghosh, M., Gokbulut, G., Gomez-Cadenas, J . J., Gonzalez-Alonso, M., Gonzalez, F., Halic, L., Happe, C., Heil, P., Heinz, A., Herde, H., Holl, M., Jenke, T., Jenssen, M., Jericha, E., Johansson, H. T., Johansson, R., Johansson, T., Kamyshkov, Y., Topaksu, A. Kayis, Kildetoft, B., Kirch, K., Klicek, B., Klinkby, E., Kolevatov, R., Konrad, G., Koziol, M., Krhac, K., Kupsc, A., Lacny, L., Larizgoitia, L., Lewis, C. M., Lindroos, M., Lychagin, E., Lytken, E., Maiano, C., Marciniewski, P., Markaj, G., Markisch, B., Marrelli, C., Martins, C., Meirose, B., Mezzetto, M., Milas, N., Milstead, D., Monrabal, F., Muhrer, G., Nepomuceno, A., Nesvizhevsky, V., Nilsson, T., Novella, P., Oglakci, M., Ohlsson, T., Olvegard, M., Oskarsson, A., Ota, T., Park, J., Patrzalek, D., Perrey, H., Persoz, M., Petkov, G., Piegsa, F. M., Pistillo, C., Poussot, P., Privitera, P., Rataj, B., Ries, D., Rizzi, N., Rosauro-Alcaraz, S., Rozpedzik, D., Saiang, D., Santoro, V., Schmidt, U., Schober, H., Schulthess, I., Silverstein, S., Simon, A., Sina, H., Snamina, J., Snow, W. M., Soldner, T., Stavropoulos, G., Stipcevic, M., Szybinski, B., Takibayev, A., Tang, Z., Tarkeshian, R., Theroine, C., Thorne, J., Terranova, F., Thomas, J., Tolba, T., Torres-Sanchez, P., Trachanas, E., Tsenov, R., Uggerhoj, U. I., Vankova-Kirilova, G., Vassilopoulos, N., Wagner, R., Wang, X., Wildner, E., Wolke, M., Wurtz, J., Yiu, S. C., Yoon, S. G., Young, A. R., Zanini, L., Zejma, J., Zerzion, D., Zimmer, O., Zormpa, O., and Zou, Y.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Experiment
Abstract

Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world's brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches)., Comment: 121 pages, updated version after referee comments

Published
2022
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7. Decoherence in neutrino oscillation at the ESSnuSB experiment

Author

Aguilar, J., Anastasopoulos, M., Baussan, E., Bhattacharyya, A. K., Bignami, A., Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Bramati, F., Branca, A., Brunetti, G., Bustinduy, I., Carlile, C. J., Cederkall, J., Choi, T. W., Choubey, S., Christiansen, P., Collins, M., Cristaldo Morales, E., Cupiał, P., Danared, H., Dancila, D., de André, J. P. A. M., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fasoula, E., Fukuda, T., Gazis, N., Geralis, Th., Ghosh, M., Giarnetti, A., Gokbulut, G., Gupta, A., Hagner, C., Halić, L., Hariharan, V. T., Hooft, M., Iversen, K. E., Jachowicz, N., Jenssen, M., Johansson, R., Kasimi, E., Kayis Topaksu, A., Kildetof, B., Kliček, B., Kordas, K., Leisos, A., Lindroos, M., Longhin, A., Maiano, C., Majumdar, D., Marangoni, S., Marrelli, C., Martins, C., Meloni, D., Mezzetto, M., Milas, N., Muñoz, J., Niewczas, K., Oglakci, M., Ohlsson, T., Olvegård, M., Pari, M., Patrzalek, D., Petkov, G., Petridou, Ch., Poussot, P., Psallidas, A., Pupilli, F., Saiang, D., Sampsonidis, D., Schwab, C., Sordo, F., Sosa, A., Stavropoulos, G., Stipčević, M., Tarkeshian, R., Terranova, F., Tolba, T., Trachanas, E., Tsenov, R., Tsirigotis, A., Tzamarias, S. E., Vankova-Kirilova, G., Vassilopoulos, N., Vihonen, S., Wurtz, J., Zeter, V., Zormpa, O., and Zou, Y.

Published
2024
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8. The European Spallation Source neutrino Super Beam Conceptual Design Report

Author

Alekou, A., Baussan, E., Bhattacharyya, A. K., Kraljevic, N. Blaskovic, Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Buchan, O., Burgman, A., Carlile, C. J., Cederkall, J., Christiansen, P., Collins, M., Morales, E. Cristaldo, Cupiał, P., D'Alessi, L., Danared, H., Dancila, D., de André, J. P. A. M., Delahaye, J. P., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Folsom, B., Fukuda, T., Gazis, N., Galnander, B., Geralis, Th., Ghosh, M., Gokbulut, G., Halić, L., Jenssen, M., Topaksu, A. Kayis, Kildetoft, B., Kliček, B., Kozioł, M., Krhač, K., Łacny, Ł., Lindroos, M., Maiano, C., Marrelli, C., Martins, C., Mezzetto, M., Milas, N., Oglakci, M., Ohlsson, T., Olvegard, M., Ota, T., Park, J., Patrzalek, D., Petkov, G., Poussot, P., Johansson, R., Rosauro-Alcaraz, S., Saiang, D., Szybiński, B., Snamina, J., Stavropoulos, G., Stipčević, M., Tarkeshian, R., Terranova, F., Thomas, J., Tolba, T., Trachanas, E., Tsenov, R., Vankova-Kirilova, G., Vassilopoulos, N., Wildner, E., Wurtz, J., Zormpa, O., and Zou, Y.

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

This conceptual design report provides a detailed account of the European Spallation Source neutrino Super Beam (ESS$\nu$SB) feasibility study. This facility has been proposed after the measurements reported in 2012 of a relatively large value of the neutrino mixing angle $\theta_{13}$, which raised the possibility of observing potential CP violation in the leptonic sector with conventional neutrino beams. The measured value of $\theta_{13}$ also privileges the $2^{nd}$ oscillation maximum for the discovery of CP violation instead of the more typically studied $1^{st}$ maximum. The sensitivity at this $2^{nd}$ oscillation maximum is about three times higher than at the $1^{st}$ one, which implies a reduced influence of systematic errors. Working at the $2^{nd}$ oscillation maximum requires a very intense neutrino beam with an appropriate energy. The world's most intense pulsed spallation neutron source, the European Spallation Source (ESS), will have a proton linac operating at 5\,MW power, 2\,GeV kinetic energy and 14~Hz repetition rate (3~ms pulse duration, 4\% duty cycle) for neutron production. In this design study it is proposed to double the repetition rate and compress the beam pulses to the level of microseconds in order to provide an additional 5~MW proton beam for neutrino production. The physics performance has been evaluated for such a neutrino super beam, in conjunction with a megaton-scale underground water Cherenkov neutrino detector installed at a distance of 360--550\,km from ESS. The ESS proton linac upgrades, the accumulator ring required for proton-pulse compression, the target station design and optimisation, the near and far detector complexes, and the physics potential of the facility are all described in this report. The ESS linac will be operational by 2025, at which point the implementation of upgrades for the neutrino facility could begin., Comment: 216 pages

Published
2022
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9. The European Spallation Source neutrino Super Beam

Author

Alekou, A., Baussan, E., Kraljevic, N. Blaskovic, Blennow, M., Bogomilov, M., Bouquerel, E., Burgman, A., Carlile, C. J., Cederkall, J., Christiansen, P., Collins, M., Morales, E. Cristaldo, Cupial, P., Alessi, L. D, Danared, H., de Andre, J. P. A. M., Delahaye, J. P., Dracos, M., Efthymiopoulos, I., Ekelof, T., Eshraqi, M., Fanourakis, G., Fernandez-Martinez, E., Folsom, B., Gazis, N., Geralis, Th., Ghosh, M., Gokbulut, G., Halic, L., Topaksu, A. Kayis, Kildetoft, B., Klicek, B., Koziol, M., Krhac, K., Lacny, L., Lindroos, M., Mezzetto, M., Oglakci, M., Ohlsson, T., Olvegard, M., Ota, T., Park, J., Patrzalek, D., Petkov, G., Poussot, P., Johansson, R., Rosauro-Alcaraz, S., Szybinski, B., Snamina, J., Stavropoulos, G., Stipcevic, M., Terranova, F., Thomas, J., Tolba, T., Trachanas, E., Tsenov, R., Vankova-Kirilova, G., Vassilopoulos, N., Wildner, E., Wurtz, J., Zormpa, O., and Zou, Y.

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

In this Snowmass 2021 white paper, we summarise the Conceptual Design of the European Spallation Source neutrino Super Beam (ESSvSB) experiment and its synergies with the possible future muon based facilities, e.g. a Low Energy nuSTORM and the Muon Collider. The ESSvSB will benefit from the high power, 5 MW, of the European Spallation Source (ESS) LINAC in Lund-Sweden to produce the world most intense neutrino beam, enabling measurements to be made at the second oscillation maximum. Assuming a ten-year exposure, physics simulations show that the CP-invariance violation can be established with a significance of 5 sigma over more than 70% of all values of delta CP and with an error in the measurement of the delta CP angle of less than 8 degree for all values of delta CP. However, several technological and physics challenges must be further studied before achieving a final Technical Design. Measuring at the 2nd oscillation maximum necessitates a very intense neutrino beam with the appropriate energy. For this, the ESS proton beam LINAC, which is designed to produce the world's most intense neutron beam, will need to be upgraded to 10 MW power, 2.5 GeV energy and 28 Hz beam pulse repetition rate. An accumulator ring will be required for the compression of the ESS LINAC beam pulse from 2.86 ms to 1.3 mus. A high power target station facility will be needed to produce a well-focused intense (super) mu-neutrino beam. The physics performance of that neutrino Super Beam in conjunction with a megaton underground Water Cherenkov neutrino far detector installed at a distance of either 360 km or 540 km from the ESS, the baseline, has been evaluated., Comment: contribution to Snowmass 2021

Published
2022

10. Updated physics performance of the ESSnuSB experiment

Author

Alekou, A., Baussan, E., Kraljevic, N. Blaskovic, Blennow, M., Bogomilov, M., Bouquerel, E., Burgman, A., Carlile, C. J., Cederkall, J., Christiansen, P., Collins, M., Morales, E. Cristaldo, D'Alessi, L., Danared, H., de André, J. P. A. M., Delahaye, J. P., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Fernandez-Martinez, E., Folsom, B., Ghosh, M., Gokbulut, G., Halić, L., Topaksu, A. Kayis, Kliček, B., Krhač, K., Lindroos, M., Mezzetto, M., Oglakci, M., Ohlsson, T., Olvegård, M., Ota, T., Park, J., Petkov, G., Poussot, P., Rosauro-Alcaraz, S., Stavropoulos, G., Stipčević, M., Terranova, F., Thomas, J., Tolba, T., Tsenov, R., Vankova-Kirilova, G., Vassilopoulos, N., Wildner, E., Wurtz, J., Zormpa, O., and Zou, Y.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

In this paper, we present the physics performance of the ESSnuSB experiment in the standard three flavor scenario using the updated neutrino flux calculated specifically for the ESSnuSB configuration and updated migration matrices for the far detector. Taking conservative systematic uncertainties corresponding to a normalization error of $5\%$ for signal and $10\%$ for background, we find that there is $10\sigma$ $(13\sigma)$ CP violation discovery sensitivity for the baseline option of 540 km (360 km) at $\delta_{\rm CP} = \pm 90^\circ$. The corresponding fraction of $\delta_{\rm CP}$ for which CP violation can be discovered at more than $5 \sigma$ is $70\%$. Regarding CP precision measurements, the $1\sigma$ error associated with $\delta_{\rm CP} = 0^\circ$ is around $5^\circ$ and with $\delta_{\rm CP} = -90^\circ$ is around $14^\circ$ $(7^\circ)$ for the baseline option of 540 km (360 km). For hierarchy sensitivity, one can have $3\sigma$ sensitivity for 540 km baseline except $\delta_{\rm CP} = \pm 90^\circ$ and $5\sigma$ sensitivity for 360 km baseline for all values of $\delta_{\rm CP}$. The octant of $\theta_{23}$ can be determined at $3 \sigma$ for the values of: $\theta_{23} > 51^\circ$ ($\theta_{23} < 42^\circ$ and $\theta_{23} > 49^\circ$) for baseline of 540 km (360 km). Regarding measurement precision of the atmospheric mixing parameters, the allowed values at $3 \sigma$ are: $40^\circ < \theta_{23} < 52^\circ$ ($42^\circ < \theta_{23} < 51.5^\circ$) and $2.485 \times 10^{-3}$ eV$^2 < \Delta m^2_{31} < 2.545 \times 10^{-3}$ eV$^2$ ($2.49 \times 10^{-3}$ eV$^2 < \Delta m^2_{31} < 2.54 \times 10^{-3}$ eV$^2$) for the baseline of 540 km (360 km)., Comment: 13 pages, 8 figures, 3 tables. Changes: Text updated, this is a published version

Published
2021
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11. Correction: The European Spallation Source neutrino super-beam conceptual design report

Author

Alekou, A., Baussan, E., Bhattacharyya, A. K., Kraljevic, N. Blaskovic, Blennow, M., Bogomilov, M., Bolling, B., Bouquerel, E., Buchan, O., Burgman, A., Carlile, C. J., Cederkall, J., Christiansen, P., Collins, M., Morales, E. Cristaldo, Cupiał, P., D’Alessi, L., Danared, H., Dancila, D., de André, J. P. A. M., Delahaye, J. P., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Folsom, B., Fukuda, T., Gazis, N., Gålnander, B., Geralis, Th., Ghosh, M., Gokbulut, G., Halić, L., Jenssen, M., Topaksu, A. Kayis, Kildetoft, B., Kliček, B., Kozioł, M., Krhač, K., Łacny, Ł., Lindroos, M., Maiano, C., Marrelli, C., Martins, C., Mezzetto, M., Milas, N., Oglakci, M., Ohlsson, T., Olvegård, M., Ota, T., Park, J., Patrzalek, D., Petkov, G., Poussot, P., Johansson, R., Rosauro-Alcaraz, S., Saiang, D., Szybiński, B., Snamina, J., Sosa, A. G., Stavropoulos, G., Stipčević, M., Tarkeshian, R., Terranova, F., Thomas, J., Tolba, T., Trachanas, E., Tsenov, R., Vankova-Kirilova, G., Vassilopoulos, N., Wildner, E., Wurtz, J., Zormpa, O., and Zou, Y.

Published
2023
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12. Polarized Neutron Laue Diffraction on a Crystal Containing Dynamically Polarized Proton Spins

Author

Piegsa, F. M., Karlsson, M., Brandt, B. van den, Carlile, C. J., Forgan, E. M., Hautle, P., Konter, J. A., McIntyre, G. J., and Zimmer, O.

Subjects
Condensed Matter - Materials Science
Abstract

We report on a polarized-neutron Laue diffraction experiment on a single crystal of neodynium doped lanthanum magnesium nitrate hydrate containing polarized proton spins. By using dynamic nuclear polarization to polarize the proton spins, we demonstrate that the intensities of the Bragg peaks can be enhanced or diminished significantly, whilst the incoherent background, due to proton spin disorder, is reduced. It follows that the method offers unique possibilities to tune continuously the contrast of the Bragg reflections and thereby represents a new tool for increasing substantially the signal-to-noise ratio in neutron diffraction patterns of hydrogenous matter., Comment: 5 pages, 3 figures

Published
2012

13. The ESSnuSB Design Study: Overview and Future Prospects

Author

Alekou, A., primary, Baussan, E., additional, Bhattacharyya, A. K., additional, Kraljevic, N. Blaskovic, additional, Blennow, M., additional, Bogomilov, M., additional, Bolling, B., additional, Bouquerel, E., additional, Bramati, F., additional, Branca, A., additional, Buchan, O., additional, Burgman, A., additional, Carlile, C. J., additional, Cederkall, J., additional, Choubey, S., additional, Christiansen, P., additional, Collins, M., additional, Morales, E. Cristaldo, additional, D’Alessi, L., additional, Danared, H., additional, Dancila, D., additional, de André, J. P. A. M., additional, Delahaye, J. P., additional, Dracos, M., additional, Efthymiopoulos, I., additional, Ekelöf, T., additional, Eshraqi, M., additional, Fanourakis, G., additional, Farricker, A., additional, Fernandez-Martinez, E., additional, Folsom, B., additional, Fukuda, T., additional, Gazis, N., additional, Gålnander, B., additional, Geralis, Th., additional, Ghosh, M., additional, Giarnetti, A., additional, Gokbulut, G., additional, Halić, L., additional, Jenssen, M., additional, Johansson, R., additional, Topaksu, A. Kayis, additional, Kildetoft, B., additional, Kliček, B., additional, Kozioł, M., additional, Krhač, K., additional, Łacny, Ł., additional, Lindroos, M., additional, Longhin, A., additional, Maiano, C., additional, Marangoni, S., additional, Marrelli, C., additional, Martins, C., additional, Meloni, D., additional, Mezzetto, M., additional, Milas, N., additional, Oglakci, M., additional, Ohlsson, T., additional, Olvegård, M., additional, Ota, T., additional, Pari, M., additional, Park, J., additional, Patrzalek, D., additional, Petkov, G., additional, Poussot, P., additional, Pupilli, F., additional, Rosauro-Alcaraz, S., additional, Saiang, D., additional, Snamina, J., additional, Sosa, A., additional, Stavropoulos, G., additional, Stipčević, M., additional, Szybiński, B., additional, Tarkeshian, R., additional, Terranova, F., additional, Thomas, J., additional, Tolba, T., additional, Trachanas, E., additional, Tsenov, R., additional, Vankova-Kirilova, G., additional, Vassilopoulos, N., additional, Wildner, E., additional, Wurtz, J., additional, Zormpa, O., additional, and Zou, Y., additional

Published
2023
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14. Particle physics at the European Spallation Source

Author

Abele, H, Alekou, A, Algora, A, Andersen, K, Baessler, S, Barron-Palos, L, Barrow, J, Baussan, E, Bentley, P, Berezhiani, Z, Bessler, Y, Bhattacharyya, A, Bianchi, A, Bijnens, J, Blanco, C, Kraljevic, N, Blennow, M, Bodek, K, Bogomilov, M, Bohm, C, Bolling, B, Bouquerel, E, Brooijmans, G, Broussard, L, Buchan, O, Burgman, A, Calen, H, Carlile, C, Cederkall, J, Chanel, E, Christiansen, P, Cirigliano, V, Collar, J, Collins, M, Crawford, C, Morales, E, Cupial, P, D'Alessi, L, Damian, J, Danared, H, Dancila, D, de Andre, J, Delahaye, J, Degenkolb, S, Di Julio, D, Dracos, M, Dunne, K, Efthymiopoulos, I, Ekelof, T, Eklund, L, Eshraqi, M, Esteban, I, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Ferreira, M, Fertl, M, Fierlinger, P, Folsom, B, Frank, A, Fratangelo, A, Friman-Gayer, U, Fukuda, T, Fynbo, H, Sosa, A, Gazis, N, Galnander, B, Geralis, T, Ghosh, M, Gokbulut, G, Gomez-Cadenas, J, Gonzalez-Alonso, M, Gonzalez, F, Halic, L, Happe, C, Heil, P, Heinz, A, Herde, H, Holl, M, Jenke, T, Jenssen, M, Jericha, E, Johansson, H, Johansson, R, Johansson, T, Kamyshkov, Y, Topaksu, A, Kildetoft, B, Kirch, K, Klicek, B, Klinkby, E, Kolevatov, R, Konrad, G, Koziol, M, Krhac, K, Kupsc, A, Lacny, L, Larizgoitia, L, Lewis, C, Lindroos, M, Lychagin, E, Lytken, E, Maiano, C, Marciniewski, P, Markaj, G, Markisch, B, Marrelli, C, Martins, C, Meirose, B, Mezzetto, M, Milas, N, Milstead, D, Monrabal, F, Muhrer, G, Nepomuceno, A, Nesvizhevsky, V, Nilsson, T, Novella, P, Oglakci, M, Ohlsson, T, Olvegard, M, Oskarsson, A, Ota, T, Park, J, Patrzalek, D, Perrey, H, Persoz, M, Petkov, G, Piegsa, F, Pistillo, C, Poussot, P, Privitera, P, Rataj, B, Ries, D, Rizzi, N, Rosauro-Alcaraz, S, Rozpedzik, D, Saiang, D, Santoro, V, Schmidt, U, Schober, H, Schulthess, I, Silverstein, S, Simon, A, Sina, H, Snamina, J, Snow, W, Soldner, T, Stavropoulos, G, Stipcevic, M, Szybinski, B, Takibayev, A, Tang, Z, Tarkeshian, R, Theroine, C, Thorne, J, Terranova, F, Thomas, J, Tolba, T, Torres-Sanchez, P, Trachanas, E, Tsenov, R, Uggerhoj, U, Vankova-Kirilova, G, Vassilopoulos, N, Wagner, R, Wang, X, Wildner, E, Wolke, M, Wurtz, J, Yiu, S, Yoon, S, Young, A, Zanini, L, Zejma, J, Zerzion, D, Zimmer, O, Zormpa, O, Zou, Y, Abele H., Alekou A., Algora A., Andersen K., Baessler S., Barron-Palos L., Barrow J., Baussan E., Bentley P., Berezhiani Z., Bessler Y., Bhattacharyya A. K., Bianchi A., Bijnens J., Blanco C., Kraljevic N. B., Blennow M., Bodek K., Bogomilov M., Bohm C., Bolling B., Bouquerel E., Brooijmans G., Broussard L. J., Buchan O., Burgman A., Calen H., Carlile C. J., Cederkall J., Chanel E., Christiansen P., Cirigliano V., Collar J. I., Collins M., Crawford C. B., Morales E. C., Cupial P., D'Alessi L., Damian J. I. M., Danared H., Dancila D., de Andre J. P. A. M., Delahaye J. P., Degenkolb S., Di Julio D. D., Dracos M., Dunne K., Efthymiopoulos I., Ekelof T., Eklund L., Eshraqi M., Esteban I., Fanourakis G., Farricker A., Fernandez-Martinez E., Ferreira M. J., Fertl M., Fierlinger P., Folsom B., Frank A., Fratangelo A., Friman-Gayer U., Fukuda T., Fynbo H. O. U., Sosa A. G., Gazis N., Galnander B., Geralis T., Ghosh M., Gokbulut G., Gomez-Cadenas J. J., Gonzalez-Alonso M., Gonzalez F., Halic L., Happe C., Heil P., Heinz A., Herde H., Holl M., Jenke T., Jenssen M., Jericha E., Johansson H. T., Johansson R., Johansson T., Kamyshkov Y., Topaksu A. K., Kildetoft B., Kirch K., Klicek B., Klinkby E., Kolevatov R., Konrad G., Koziol M., Krhac K., Kupsc A., Lacny L., Larizgoitia L., Lewis C. M., Lindroos M., Lychagin E., Lytken E., Maiano C., Marciniewski P., Markaj G., Markisch B., Marrelli C., Martins C., Meirose B., Mezzetto M., Milas N., Milstead D., Monrabal F., Muhrer G., Nepomuceno A., Nesvizhevsky V., Nilsson T., Novella P., Oglakci M., Ohlsson T., Olvegard M., Oskarsson A., Ota T., Park J., Patrzalek D., Perrey H., Persoz M., Petkov G., Piegsa F. M., Pistillo C., Poussot P., Privitera P., Rataj B., Ries D., Rizzi N., Rosauro-Alcaraz S., Rozpedzik D., Saiang D., Santoro V., Schmidt U., Schober H., Schulthess I., Silverstein S., Simon A., Sina H., Snamina J., Snow W. M., Soldner T., Stavropoulos G., Stipcevic M., Szybinski B., Takibayev A., Tang Z., Tarkeshian R., Theroine C., Thorne J., Terranova F., Thomas J., Tolba T., Torres-Sanchez P., Trachanas E., Tsenov R., Uggerhoj U. I., Vankova-Kirilova G., Vassilopoulos N., Wagner R., Wang X., Wildner E., Wolke M., Wurtz J., Yiu S. C., Yoon S. G., Young A. R., Zanini L., Zejma J., Zerzion D., Zimmer O., Zormpa O., Zou Y., Abele, H, Alekou, A, Algora, A, Andersen, K, Baessler, S, Barron-Palos, L, Barrow, J, Baussan, E, Bentley, P, Berezhiani, Z, Bessler, Y, Bhattacharyya, A, Bianchi, A, Bijnens, J, Blanco, C, Kraljevic, N, Blennow, M, Bodek, K, Bogomilov, M, Bohm, C, Bolling, B, Bouquerel, E, Brooijmans, G, Broussard, L, Buchan, O, Burgman, A, Calen, H, Carlile, C, Cederkall, J, Chanel, E, Christiansen, P, Cirigliano, V, Collar, J, Collins, M, Crawford, C, Morales, E, Cupial, P, D'Alessi, L, Damian, J, Danared, H, Dancila, D, de Andre, J, Delahaye, J, Degenkolb, S, Di Julio, D, Dracos, M, Dunne, K, Efthymiopoulos, I, Ekelof, T, Eklund, L, Eshraqi, M, Esteban, I, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Ferreira, M, Fertl, M, Fierlinger, P, Folsom, B, Frank, A, Fratangelo, A, Friman-Gayer, U, Fukuda, T, Fynbo, H, Sosa, A, Gazis, N, Galnander, B, Geralis, T, Ghosh, M, Gokbulut, G, Gomez-Cadenas, J, Gonzalez-Alonso, M, Gonzalez, F, Halic, L, Happe, C, Heil, P, Heinz, A, Herde, H, Holl, M, Jenke, T, Jenssen, M, Jericha, E, Johansson, H, Johansson, R, Johansson, T, Kamyshkov, Y, Topaksu, A, Kildetoft, B, Kirch, K, Klicek, B, Klinkby, E, Kolevatov, R, Konrad, G, Koziol, M, Krhac, K, Kupsc, A, Lacny, L, Larizgoitia, L, Lewis, C, Lindroos, M, Lychagin, E, Lytken, E, Maiano, C, Marciniewski, P, Markaj, G, Markisch, B, Marrelli, C, Martins, C, Meirose, B, Mezzetto, M, Milas, N, Milstead, D, Monrabal, F, Muhrer, G, Nepomuceno, A, Nesvizhevsky, V, Nilsson, T, Novella, P, Oglakci, M, Ohlsson, T, Olvegard, M, Oskarsson, A, Ota, T, Park, J, Patrzalek, D, Perrey, H, Persoz, M, Petkov, G, Piegsa, F, Pistillo, C, Poussot, P, Privitera, P, Rataj, B, Ries, D, Rizzi, N, Rosauro-Alcaraz, S, Rozpedzik, D, Saiang, D, Santoro, V, Schmidt, U, Schober, H, Schulthess, I, Silverstein, S, Simon, A, Sina, H, Snamina, J, Snow, W, Soldner, T, Stavropoulos, G, Stipcevic, M, Szybinski, B, Takibayev, A, Tang, Z, Tarkeshian, R, Theroine, C, Thorne, J, Terranova, F, Thomas, J, Tolba, T, Torres-Sanchez, P, Trachanas, E, Tsenov, R, Uggerhoj, U, Vankova-Kirilova, G, Vassilopoulos, N, Wagner, R, Wang, X, Wildner, E, Wolke, M, Wurtz, J, Yiu, S, Yoon, S, Young, A, Zanini, L, Zejma, J, Zerzion, D, Zimmer, O, Zormpa, O, Zou, Y, Abele H., Alekou A., Algora A., Andersen K., Baessler S., Barron-Palos L., Barrow J., Baussan E., Bentley P., Berezhiani Z., Bessler Y., Bhattacharyya A. K., Bianchi A., Bijnens J., Blanco C., Kraljevic N. B., Blennow M., Bodek K., Bogomilov M., Bohm C., Bolling B., Bouquerel E., Brooijmans G., Broussard L. J., Buchan O., Burgman A., Calen H., Carlile C. J., Cederkall J., Chanel E., Christiansen P., Cirigliano V., Collar J. I., Collins M., Crawford C. B., Morales E. C., Cupial P., D'Alessi L., Damian J. I. M., Danared H., Dancila D., de Andre J. P. A. M., Delahaye J. P., Degenkolb S., Di Julio D. D., Dracos M., Dunne K., Efthymiopoulos I., Ekelof T., Eklund L., Eshraqi M., Esteban I., Fanourakis G., Farricker A., Fernandez-Martinez E., Ferreira M. J., Fertl M., Fierlinger P., Folsom B., Frank A., Fratangelo A., Friman-Gayer U., Fukuda T., Fynbo H. O. U., Sosa A. G., Gazis N., Galnander B., Geralis T., Ghosh M., Gokbulut G., Gomez-Cadenas J. J., Gonzalez-Alonso M., Gonzalez F., Halic L., Happe C., Heil P., Heinz A., Herde H., Holl M., Jenke T., Jenssen M., Jericha E., Johansson H. T., Johansson R., Johansson T., Kamyshkov Y., Topaksu A. K., Kildetoft B., Kirch K., Klicek B., Klinkby E., Kolevatov R., Konrad G., Koziol M., Krhac K., Kupsc A., Lacny L., Larizgoitia L., Lewis C. M., Lindroos M., Lychagin E., Lytken E., Maiano C., Marciniewski P., Markaj G., Markisch B., Marrelli C., Martins C., Meirose B., Mezzetto M., Milas N., Milstead D., Monrabal F., Muhrer G., Nepomuceno A., Nesvizhevsky V., Nilsson T., Novella P., Oglakci M., Ohlsson T., Olvegard M., Oskarsson A., Ota T., Park J., Patrzalek D., Perrey H., Persoz M., Petkov G., Piegsa F. M., Pistillo C., Poussot P., Privitera P., Rataj B., Ries D., Rizzi N., Rosauro-Alcaraz S., Rozpedzik D., Saiang D., Santoro V., Schmidt U., Schober H., Schulthess I., Silverstein S., Simon A., Sina H., Snamina J., Snow W. M., Soldner T., Stavropoulos G., Stipcevic M., Szybinski B., Takibayev A., Tang Z., Tarkeshian R., Theroine C., Thorne J., Terranova F., Thomas J., Tolba T., Torres-Sanchez P., Trachanas E., Tsenov R., Uggerhoj U. I., Vankova-Kirilova G., Vassilopoulos N., Wagner R., Wang X., Wildner E., Wolke M., Wurtz J., Yiu S. C., Yoon S. G., Young A. R., Zanini L., Zejma J., Zerzion D., Zimmer O., Zormpa O., and Zou Y.

Abstract

Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world's brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches).

Published
2023

15. The ESSnuSB Design Study: Overview and Future Prospects

Author

Alekou, A, Baussan, E, Bhattacharyya, A, Kraljevic, N, Blennow, M, Bogomilov, M, Bolling, B, Bouquerel, E, Bramati, F, Branca, A, Buchan, O, Burgman, A, Carlile, C, Cederkall, J, Choubey, S, Christiansen, P, Collins, M, Morales, E, D’Alessi, L, Danared, H, Dancila, D, de André, J, Delahaye, J, Dracos, M, Efthymiopoulos, I, Ekelöf, T, Eshraqi, M, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Folsom, B, Fukuda, T, Gazis, N, Gålnander, B, Geralis, T, Ghosh, M, Giarnetti, A, Gokbulut, G, Halić, L, Jenssen, M, Johansson, R, Topaksu, A, Kildetoft, B, Kliček, B, Kozioł, M, Krhač, K, Łacny, Lindroos, M, Longhin, A, Maiano, C, Marangoni, S, Marrelli, C, Martins, C, Meloni, D, Mezzetto, M, Milas, N, Oglakci, M, Ohlsson, T, Olvegård, M, Ota, T, Pari, M, Park, J, Patrzalek, D, Petkov, G, Poussot, P, Pupilli, F, Rosauro-Alcaraz, S, Saiang, D, Snamina, J, Sosa, A, Stavropoulos, G, Stipčević, M, Szybiński, B, Tarkeshian, R, Terranova, F, Thomas, J, Tolba, T, Trachanas, E, Tsenov, R, Vankova-Kirilova, G, Vassilopoulos, N, Wildner, E, Wurtz, J, Zormpa, O, Zou, Y, Alekou A., Baussan E., Bhattacharyya A. K., Kraljevic N. B., Blennow M., Bogomilov M., Bolling B., Bouquerel E., Bramati F., Branca A., Buchan O., Burgman A., Carlile C. J., Cederkall J., Choubey S., Christiansen P., Collins M., Morales E. C., D’Alessi L., Danared H., Dancila D., de André J. P. A. M., Delahaye J. P., Dracos M., Efthymiopoulos I., Ekelöf T., Eshraqi M., Fanourakis G., Farricker A., Fernandez-Martinez E., Folsom B., Fukuda T., Gazis N., Gålnander B., Geralis T., Ghosh M., Giarnetti A., Gokbulut G., Halić L., Jenssen M., Johansson R., Topaksu A. K., Kildetoft B., Kliček B., Kozioł M., Krhač K., Lindroos M., Longhin A., Maiano C., Marangoni S., Marrelli C., Martins C., Meloni D., Mezzetto M., Milas N., Oglakci M., Ohlsson T., Olvegård M., Ota T., Pari M., Park J., Patrzalek D., Petkov G., Poussot P., Pupilli F., Rosauro-Alcaraz S., Saiang D., Snamina J., Sosa A., Stavropoulos G., Stipčević M., Szybiński B., Tarkeshian R., Terranova F., Thomas J., Tolba T., Trachanas E., Tsenov R., Vankova-Kirilova G., Vassilopoulos N., Wildner E., Wurtz J., Zormpa O., Zou Y., Alekou, A, Baussan, E, Bhattacharyya, A, Kraljevic, N, Blennow, M, Bogomilov, M, Bolling, B, Bouquerel, E, Bramati, F, Branca, A, Buchan, O, Burgman, A, Carlile, C, Cederkall, J, Choubey, S, Christiansen, P, Collins, M, Morales, E, D’Alessi, L, Danared, H, Dancila, D, de André, J, Delahaye, J, Dracos, M, Efthymiopoulos, I, Ekelöf, T, Eshraqi, M, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Folsom, B, Fukuda, T, Gazis, N, Gålnander, B, Geralis, T, Ghosh, M, Giarnetti, A, Gokbulut, G, Halić, L, Jenssen, M, Johansson, R, Topaksu, A, Kildetoft, B, Kliček, B, Kozioł, M, Krhač, K, Łacny, Lindroos, M, Longhin, A, Maiano, C, Marangoni, S, Marrelli, C, Martins, C, Meloni, D, Mezzetto, M, Milas, N, Oglakci, M, Ohlsson, T, Olvegård, M, Ota, T, Pari, M, Park, J, Patrzalek, D, Petkov, G, Poussot, P, Pupilli, F, Rosauro-Alcaraz, S, Saiang, D, Snamina, J, Sosa, A, Stavropoulos, G, Stipčević, M, Szybiński, B, Tarkeshian, R, Terranova, F, Thomas, J, Tolba, T, Trachanas, E, Tsenov, R, Vankova-Kirilova, G, Vassilopoulos, N, Wildner, E, Wurtz, J, Zormpa, O, Zou, Y, Alekou A., Baussan E., Bhattacharyya A. K., Kraljevic N. B., Blennow M., Bogomilov M., Bolling B., Bouquerel E., Bramati F., Branca A., Buchan O., Burgman A., Carlile C. J., Cederkall J., Choubey S., Christiansen P., Collins M., Morales E. C., D’Alessi L., Danared H., Dancila D., de André J. P. A. M., Delahaye J. P., Dracos M., Efthymiopoulos I., Ekelöf T., Eshraqi M., Fanourakis G., Farricker A., Fernandez-Martinez E., Folsom B., Fukuda T., Gazis N., Gålnander B., Geralis T., Ghosh M., Giarnetti A., Gokbulut G., Halić L., Jenssen M., Johansson R., Topaksu A. K., Kildetoft B., Kliček B., Kozioł M., Krhač K., Lindroos M., Longhin A., Maiano C., Marangoni S., Marrelli C., Martins C., Meloni D., Mezzetto M., Milas N., Oglakci M., Ohlsson T., Olvegård M., Ota T., Pari M., Park J., Patrzalek D., Petkov G., Poussot P., Pupilli F., Rosauro-Alcaraz S., Saiang D., Snamina J., Sosa A., Stavropoulos G., Stipčević M., Szybiński B., Tarkeshian R., Terranova F., Thomas J., Tolba T., Trachanas E., Tsenov R., Vankova-Kirilova G., Vassilopoulos N., Wildner E., Wurtz J., Zormpa O., and Zou Y.

Abstract

ESSnuSB is a design study for an experiment to measure the CP violation in the leptonic sector at the second neutrino oscillation maximum using a neutrino beam driven by the uniquely powerful ESS linear accelerator. The reduced impact of systematic errors on sensitivity at the second maximum allows for a very precise measurement of the CP violating parameter. This review describes the fundamental advantages of measurement at the second maximum, the necessary upgrades to the ESS linac in order to produce a neutrino beam, the near and far detector complexes, and the expected physics reach of the proposed ESSnuSB experiment, concluding with the near future developments aimed at the project realization.

Published
2023

16. Correction: The European Spallation Source neutrino super-beam conceptual design report

Author

Alekou, A., primary, Baussan, E., additional, Bhattacharyya, A. K., additional, Kraljevic, N. Blaskovic, additional, Blennow, M., additional, Bogomilov, M., additional, Bolling, B., additional, Bouquerel, E., additional, Buchan, O., additional, Burgman, A., additional, Carlile, C. J., additional, Cederkall, J., additional, Christiansen, P., additional, Collins, M., additional, Morales, E. Cristaldo, additional, Cupiał, P., additional, D’Alessi, L., additional, Danared, H., additional, Dancila, D., additional, de André, J. P. A. M., additional, Delahaye, J. P., additional, Dracos, M., additional, Efthymiopoulos, I., additional, Ekelöf, T., additional, Eshraqi, M., additional, Fanourakis, G., additional, Farricker, A., additional, Fernandez-Martinez, E., additional, Folsom, B., additional, Fukuda, T., additional, Gazis, N., additional, Gålnander, B., additional, Geralis, Th., additional, Ghosh, M., additional, Gokbulut, G., additional, Halić, L., additional, Jenssen, M., additional, Topaksu, A. Kayis, additional, Kildetoft, B., additional, Kliček, B., additional, Kozioł, M., additional, Krhač, K., additional, Łacny, Ł., additional, Lindroos, M., additional, Maiano, C., additional, Marrelli, C., additional, Martins, C., additional, Mezzetto, M., additional, Milas, N., additional, Oglakci, M., additional, Ohlsson, T., additional, Olvegård, M., additional, Ota, T., additional, Park, J., additional, Patrzalek, D., additional, Petkov, G., additional, Poussot, P., additional, Johansson, R., additional, Rosauro-Alcaraz, S., additional, Saiang, D., additional, Szybiński, B., additional, Snamina, J., additional, Sosa, A. G., additional, Stavropoulos, G., additional, Stipčević, M., additional, Tarkeshian, R., additional, Terranova, F., additional, Thomas, J., additional, Tolba, T., additional, Trachanas, E., additional, Tsenov, R., additional, Vankova-Kirilova, G., additional, Vassilopoulos, N., additional, Wildner, E., additional, Wurtz, J., additional, Zormpa, O., additional, and Zou, Y., additional

Published
2022
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17. The European Spallation Source neutrino super-beam conceptual design report

Author

Alekou, A., primary, Baussan, E., additional, Bhattacharyya, A. K., additional, Kraljevic, N. Blaskovic, additional, Blennow, M., additional, Bogomilov, M., additional, Bolling, B., additional, Bouquerel, E., additional, Buchan, O., additional, Burgman, A., additional, Carlile, C. J., additional, Cederkall, J., additional, Christiansen, P., additional, Collins, M., additional, Morales, E. Cristaldo, additional, Cupiał, P., additional, D’Alessi, L., additional, Danared, H., additional, Dancila, D., additional, de André, J. P. A. M., additional, Delahaye, J. P., additional, Dracos, M., additional, Efthymiopoulos, I., additional, Ekelöf, T., additional, Eshraqi, M., additional, Fanourakis, G., additional, Farricker, A., additional, Fernandez-Martinez, E., additional, Folsom, B., additional, Fukuda, T., additional, Gazis, N., additional, Gålnander, B., additional, Geralis, Th., additional, Ghosh, M., additional, Gokbulut, G., additional, Halić, L., additional, Jenssen, M., additional, Topaksu, A. Kayis, additional, Kildetoft, B., additional, Kliček, B., additional, Kozioł, M., additional, Krhač, K., additional, Łacny, Ł., additional, Lindroos, M., additional, Maiano, C., additional, Marrelli, C., additional, Martins, C., additional, Mezzetto, M., additional, Milas, N., additional, Oglakci, M., additional, Ohlsson, T., additional, Olvegård, M., additional, Ota, T., additional, Park, J., additional, Patrzalek, D., additional, Petkov, G., additional, Poussot, P., additional, Johansson, R., additional, Rosauro-Alcaraz, S., additional, Saiang, D., additional, Szybiński, B., additional, Snamina, J., additional, Sosa, A. G., additional, Stavropoulos, G., additional, Stipčević, M., additional, Tarkeshian, R., additional, Terranova, F., additional, Thomas, J., additional, Tolba, T., additional, Trachanas, E., additional, Tsenov, R., additional, Vankova-Kirilova, G., additional, Vassilopoulos, N., additional, Wildner, E., additional, Wurtz, J., additional, Zormpa, O., additional, and Zou, Y., additional

Published
2022
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18. Correction: The European Spallation Source neutrino super-beam conceptual design report (The European Physical Journal Special Topics, (2022), 231, 21, (3779-3955), 10.1140/epjs/s11734-022-00664-w)

Author

Alekou A., Alekou, A, Baussan, E, Bhattacharyya, A, Kraljevic, N, Blennow, M, Bogomilov, M, Bolling, B, Bouquerel, E, Buchan, O, Burgman, A, Carlile, C, Cederkall, J, Christiansen, P, Collins, M, Morales, E, Cupial, P, D'Alessi, L, Danared, H, Dancila, D, de Andre, J, Delahaye, J, Dracos, M, Efthymiopoulos, I, Ekelof, T, Eshraqi, M, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Folsom, B, Fukuda, T, Gazis, N, Galnander, B, Geralis, T, Ghosh, M, Gokbulut, G, Halic, L, Jenssen, M, Topaksu, A, Kildetoft, B, Klicek, B, Koziol, M, Krhac, K, Lacny, L, Lindroos, M, Maiano, C, Marrelli, C, Martins, C, Mezzetto, M, Milas, N, Oglakci, M, Ohlsson, T, Olvegard, M, Ota, T, Park, J, Patrzalek, D, Petkov, G, Poussot, P, Johansson, R, Rosauro-Alcaraz, S, Saiang, D, Szybinski, B, Snamina, J, Sosa, A, Stavropoulos, G, Stipcevic, M, Tarkeshian, R, Terranova, F, Thomas, J, Tolba, T, Trachanas, E, Tsenov, R, Vankova-Kirilova, G, Vassilopoulos, N, Wildner, E, Wurtz, J, Zormpa, O, Zou, Y, Alekou A., Baussan E., Bhattacharyya A. K., Kraljevic N. B., Blennow M., Bogomilov M., Bolling B., Bouquerel E., Buchan O., Burgman A., Carlile C. J., Cederkall J., Christiansen P., Collins M., Morales E. C., Cupial P., D'Alessi L., Danared H., Dancila D., de Andre J. P. A. M., Delahaye J. P., Dracos M., Efthymiopoulos I., Ekelof T., Eshraqi M., Fanourakis G., Farricker A., Fernandez-Martinez E., Folsom B., Fukuda T., Gazis N., Galnander B., Geralis T., Ghosh M., Gokbulut G., Halic L., Jenssen M., Topaksu A. K., Kildetoft B., Klicek B., Koziol M., Krhac K., Lacny L., Lindroos M., Maiano C., Marrelli C., Martins C., Mezzetto M., Milas N., Oglakci M., Ohlsson T., Olvegard M., Ota T., Park J., Patrzalek D., Petkov G., Poussot P., Johansson R., Rosauro-Alcaraz S., Saiang D., Szybinski B., Snamina J., Sosa A. G., Stavropoulos G., Stipcevic M., Tarkeshian R., Terranova F., Thomas J., Tolba T., Trachanas E., Tsenov R., Vankova-Kirilova G., Vassilopoulos N., Wildner E., Wurtz J., Zormpa O., Zou Y., Alekou A., Alekou, A, Baussan, E, Bhattacharyya, A, Kraljevic, N, Blennow, M, Bogomilov, M, Bolling, B, Bouquerel, E, Buchan, O, Burgman, A, Carlile, C, Cederkall, J, Christiansen, P, Collins, M, Morales, E, Cupial, P, D'Alessi, L, Danared, H, Dancila, D, de Andre, J, Delahaye, J, Dracos, M, Efthymiopoulos, I, Ekelof, T, Eshraqi, M, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Folsom, B, Fukuda, T, Gazis, N, Galnander, B, Geralis, T, Ghosh, M, Gokbulut, G, Halic, L, Jenssen, M, Topaksu, A, Kildetoft, B, Klicek, B, Koziol, M, Krhac, K, Lacny, L, Lindroos, M, Maiano, C, Marrelli, C, Martins, C, Mezzetto, M, Milas, N, Oglakci, M, Ohlsson, T, Olvegard, M, Ota, T, Park, J, Patrzalek, D, Petkov, G, Poussot, P, Johansson, R, Rosauro-Alcaraz, S, Saiang, D, Szybinski, B, Snamina, J, Sosa, A, Stavropoulos, G, Stipcevic, M, Tarkeshian, R, Terranova, F, Thomas, J, Tolba, T, Trachanas, E, Tsenov, R, Vankova-Kirilova, G, Vassilopoulos, N, Wildner, E, Wurtz, J, Zormpa, O, Zou, Y, Alekou A., Baussan E., Bhattacharyya A. K., Kraljevic N. B., Blennow M., Bogomilov M., Bolling B., Bouquerel E., Buchan O., Burgman A., Carlile C. J., Cederkall J., Christiansen P., Collins M., Morales E. C., Cupial P., D'Alessi L., Danared H., Dancila D., de Andre J. P. A. M., Delahaye J. P., Dracos M., Efthymiopoulos I., Ekelof T., Eshraqi M., Fanourakis G., Farricker A., Fernandez-Martinez E., Folsom B., Fukuda T., Gazis N., Galnander B., Geralis T., Ghosh M., Gokbulut G., Halic L., Jenssen M., Topaksu A. K., Kildetoft B., Klicek B., Koziol M., Krhac K., Lacny L., Lindroos M., Maiano C., Marrelli C., Martins C., Mezzetto M., Milas N., Oglakci M., Ohlsson T., Olvegard M., Ota T., Park J., Patrzalek D., Petkov G., Poussot P., Johansson R., Rosauro-Alcaraz S., Saiang D., Szybinski B., Snamina J., Sosa A. G., Stavropoulos G., Stipcevic M., Tarkeshian R., Terranova F., Thomas J., Tolba T., Trachanas E., Tsenov R., Vankova-Kirilova G., Vassilopoulos N., Wildner E., Wurtz J., Zormpa O., and Zou Y.

Abstract

In Fig. 1 of this article one label was incorrectly given as “H+” but should have been “H−”; the figure should have appeared as shown below. (Figure presented.) The layout of the (Formula presented.) components on the ESS and the far detector sites In this article A. G. Sosa was missing from the author list. His affiliation is European Spallation Source, Box 176, 221 00 Lund, Sweden (affiliation 10). The original article has been corrected.

Published
2022

19. Updated physics performance of the ESSnuSB experiment

Author

Alekou, A., primary, Baussan, E., additional, Blaskovic Kraljevic, N., additional, Blennow, M., additional, Bogomilov, M., additional, Bouquerel, E., additional, Burgman, A., additional, Carlile, C. J., additional, Cederkall, J., additional, Christiansen, P., additional, Collins, M., additional, Cristaldo Morales, E., additional, D’Alessi, L., additional, Danared, H., additional, de André, J. P. A. M., additional, Delahaye, J. P., additional, Dracos, M., additional, Efthymiopoulos, I., additional, Ekelöf, T., additional, Eshraqi, M., additional, Fanourakis, G., additional, Fernandez-Martinez, E., additional, Folsom, B., additional, Ghosh, M., additional, Gokbulut, G., additional, Halić, L., additional, Kayis Topaksu, A., additional, Kliček, B., additional, Krhač, K., additional, Lindroos, M., additional, Mezzetto, M., additional, Oglakci, M., additional, Ohlsson, T., additional, Olvegård, M., additional, Ota, T., additional, Park, J., additional, Petkov, G., additional, Poussot, P., additional, Rosauro-Alcaraz, S., additional, Stavropoulos, G., additional, Stipčević, M., additional, Terranova, F., additional, Thomas, J., additional, Tolba, T., additional, Tsenov, R., additional, Vankova-Kirilova, G., additional, Vassilopoulos, N., additional, Wildner, E., additional, Wurtz, J., additional, Zormpa, O., additional, and Zou, Y., additional

Published
2021
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20. ESSnuSB collaboration

Author

Alekou, A., Baussan, E., Blaskovic Kraljevic, N., Blennow, M., Bogomilov, M., Bouquerel, E., Burgman, A., Carlile, C. J., Cederkall, J., Christiansen, P., Collins, M., Cristaldo Morales, E., Alessi, L. D., Danared, H., André, J. P. A. M., Delahaye, J. P., Dracos, M., Efthymiopoulos, I., Ekelöf, T., Eshraqi, M., Fanourakis, G., Fernandez-Martinez, E., Folsom, B., Ghosh, M., Gokbulut, G., Halić, L., Kayis Topaksu, A., Kliček, B., Krhač, K., Lindroos, M., Mezzetto, M., Oglakci, M., Ohlsson, T., Olvegård, M., Ota, T., Park, J., Petkov, G., Poussot, P., Rosauro-Alcaraz, S., Stavropoulos, G., Stipčević, M., Terranova, F., Thomas, J., Tolba, T., Tsenov, R., Vankova-Kirilova, G., Vassilopoulos, N., Wildner, E., jacques wurtz, Zormpa, O., Zou, Y., HEP, INSPIRE, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ESSnuSB, and European Organization for Nuclear Research (CERN)

Subjects
Physics - Instrumentation and Detectors, far detector, QC770-798, hierarchy, Astrophysics, High Energy Physics - Experiment, Subatomär fysik, High Energy Physics - Experiment (hep-ex), neutrino, High Energy Physics - Phenomenology (hep-ph), Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino: flux: calculated, Detectors and Experimental Techniques, physics.ins-det, ComputingMilieux_MISCELLANEOUS, Physics, hep-ph, Instrumentation and Detectors (physics.ins-det), essnusb, cp violation, QB460-466, High Energy Physics - Phenomenology, neutrino: detector, CP, violation, proposed experiment, numerical calculations: Monte Carlo, Particle Physics - Experiment, performance, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino: mass difference, FOS: Physical sciences, Nuclear and particle physics. Atomic energy. Radioactivity, ESSnuSB, CP: violation, conservation law, mixing, calculated, flavor: 3, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Particle Physics - Phenomenology, flavor, hep-ex, background, sensitivity, neutrino: mixing angle, flux, [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], atmosphere, neutrino: oscillation, neutrino: mixing
Abstract

In this paper, we present the physics performance of the ESSnuSB experiment in the standard three flavor scenario using the updated neutrino flux calculated specifically for the ESSnuSB configuration and updated migration matrices for the far detector. Taking conservative systematic uncertainties corresponding to a normalization error of $5\%$ for signal and $10\%$ for background, we find that there is $10\sigma$ $(13\sigma)$ CP violation discovery sensitivity for the baseline option of 540 km (360 km) at $\delta_{\rm CP} = \pm 90^\circ$. The corresponding fraction of $\delta_{\rm CP}$ for which CP violation can be discovered at more than $5 \sigma$ is $70\%$. Regarding CP precision measurements, the $1\sigma$ error associated with $\delta_{\rm CP} = 0^\circ$ is around $5^\circ$ and with $\delta_{\rm CP} = -90^\circ$ is around $14^\circ$ $(7^\circ)$ for the baseline option of 540 km (360 km). For hierarchy sensitivity, one can have $3\sigma$ sensitivity for 540 km baseline except $\delta_{\rm CP} = \pm 90^\circ$ and $5\sigma$ sensitivity for 360 km baseline for all values of $\delta_{\rm CP}$. The octant of $\theta_{23}$ can be determined at $3 \sigma$ for the values of: $\theta_{23} > 51^\circ$ ($\theta_{23} < 42^\circ$ and $\theta_{23} > 49^\circ$) for baseline of 540 km (360 km). Regarding measurement precision of the atmospheric mixing parameters, the allowed values at $3 \sigma$ are: $40^\circ < \theta_{23} < 52^\circ$ ($42^\circ < \theta_{23} < 51.5^\circ$) and $2.485 \times 10^{-3}$ eV$^2 < \Delta m^2_{31} < 2.545 \times 10^{-3}$ eV$^2$ ($2.49 \times 10^{-3}$ eV$^2 < \Delta m^2_{31} < 2.54 \times 10^{-3}$ eV$^2$) for the baseline of 540 km (360 km)., Comment: 13 pages, 8 figures, 3 tables. Changes: Text updated, this is a published version

Published
2021
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26. Molecular spectroscopy and Bayesian spectral analysis—how many lines are there?

Author

Sivia, D. S. and Carlile, C. J.

Subjects
*SPECTRUM analysis, *MOLECULAR spectroscopy, *SCATTERING (Physics), *NEUTRONS
Abstract

We demonstrate the Bayesian spectral analysis approach for analyzing neutron scattering molecular tunneling data. It is a generalized form of model fitting, which is appropriate when the number of parameters to be optimized is not known. Specifically, it addresses the question of how many excitation lines there is evidence for in the data. We review the theory of Bayesian spectral analysis relevant to our particular application, describe an efficient algorithm for its implementation, and illustrate its use with both simulated and real data. We believe that this powerful method of analysis will be a very useful tool in experimental molecular spectroscopy. [ABSTRACT FROM AUTHOR]

Published
1992
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27. Rotational excitations of a symmetric top in cubic orientational potentials. II. CHD3 matrix-isolated in argon.

Author

Asmussen, B., Prager, M., Müller, M., Balszunat, D., Press, W., and Carlile, C. J.

Subjects
MOLECULAR rotation, ELECTRONIC excitation, NEUTRON sources, ARGON
Abstract

Inelastic neutron scattering has been performed on CHD3 molecules matrix isolated in solid argon. Four inelastic lines have been observed within the energy transfer range 0≤hω≤2.5 meV. The corresponding energy level scheme and the line intensities are explained in terms of a model based on a completely free rotation of the CHD3 molecule. An expression for the double differential neutron scattering cross section of the free CHD3 rotor is derived. In spite of a line shift of 44% with respect to the free rotor, no crystal field splitting was observed. © 1996 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
1996
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28. Rotational excitations of a symmetric top in cubic orientational potentials: CH3D matrix-isolated in argon and krypton.

Author

Asmussen, B., Balszunat, D., Prager, M., Press, W., Carlile, C. J., and Büttner, H.

Subjects
ARGON, KRYPTON, WAVE functions, MOMENTUM transfer
Abstract

Measurements with inelastic neutron scattering of the rotational spectra of the symmetric top molecule CH3D as substitutional impurities in crystalline argon and krypton are presented. The energy of the J=1 doublet is shifted by 33% and 27% respectively, compared to the completely free rotor. Spin-rotational wave functions for the free CH3D rotor are constructed and used for the calculation of the dependence of the scattered intensities on momentum transfer. In contrast to the CH4 molecule, the center of mass does not coincide with the position of the carbon atom in the case of the CH3D molecule. However, energies and intensities can only be explained if this fact is disregarded. The spin conversion behavior has been studied on a CH3D/argon sample within the temperature range 1.5 K≤T≤5 K. Two different mechanisms for the conversion process (libron-phonon process and Raman process) are discussed. © 1995 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
1995
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29. The librational ground state of monodeuterated methane adsorbed on graphite.

Author

Inaba, A., Skarbek, J., Lu, J. R., Thomas, R. K., Carlile, C. J., and Sivia, D. S.

Subjects
SCATTERING (Physics), HIGH resolution spectroscopy
Abstract

High resolution inelastic neutron scattering spectra of CH4, CH4/CD4 mixtures, and CH3D adsorbed on exfoliated graphite at 4.5 K have been obtained. The resolution used was approximately five times higher than previously used and has revealed extra detail in the spectra. For CH4 it is shown that the parameter, H, related to rotation about the twofold axes is not exactly zero. It has an unexpected small positive value. For a 1:2 CH4/CD4 mixture the tunneling spectra of the CH4 show that the mixture must be ordered at 4.5 K and that the barriers to rotation of the CH4 are increased slightly when the surrounding CH4 molecules are replaced by the heavier CD4. For CH3D the higher resolution spectra make it possible to make an unambiguous assignment of the tunneling spectra, which is different from that previously proposed. The assignment indicates that there are terms in the orientational potential higher than the threefold Fourier components previously assumed, but that these probably do not affect the derived heights of the barriers to rotation of methane on graphite. © 1995 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
1995
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30. Methane in neon: Nearly free rotation in a mismatched guest–host system.

Author

Prager, M., Asmussen, B., and Carlile, C. J.

Subjects
MATRIX isolation spectroscopy, ENERGY transfer, METHANE
Abstract

A nonequilibrium solid solution of 2% CH4 in Ne has been prepared by the matrix isolation technique. The system retains the fcc structure of pure Ne. A broad distribution of methane tunneling frequencies centered at an energy transfer of 0.5 meV is observed by inelastic neutron scattering. All CH4 molecules contribute to this distribution. For geometric reasons, to be consistent with the long range order of the matrix, the guest molecules must appear as trimers or higher multimers. The variety of aggregates with differing local surroundings and the complex level schemes of clusters of interacting molecules produce the broad distribution of tunnel transitions. Annealing leads to a wider potential distribution. In thermal equilibrium methane is insoluble in neon. [ABSTRACT FROM AUTHOR]

Published
1994
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31. Methane rotation and the phase diagram of CH4/xenon.

Author

Prager, M., Asmussen, B., Langel, W., Carlile, C. J., and Blank, H.

Subjects
PHASE diagrams, XENON, METHANE, DIMERS
Abstract

(CH4)cXe1-c systems with c=0.008, 0.015, 0.025, 0.1, and 0.9 have been investigated with inelastic neutron scattering. Tunnel transitions show almost free rotation of isolated CH4 quantum rotors at low methane concentrations and the appearance of dimers and trimers with increasing concentration. The rotational potential seen by a CH4 defect is explained by a model on the basis of statistical distributions of local orientational potentials. Disorder in a nonequilibrium matrix leads to a broad distribution of rotational potentials. A perturbed partially ordered phase II at large concentrations extends to higher concentrations than in CH4/Ar. No miscibility gap similar to that in CH4/Ar is found within the accessible concentration range c≤0.1 and c≥0.9. [ABSTRACT FROM AUTHOR]

Published
1993
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32. Methane tunneling in disordered solid argon–nitrogen phases.

Author

Langel, W., Prager, M., Fleger, H.-W., Knözinger, E., Lauter, H.-J., Blank, H., and Carlile, C. J.

Subjects
GAS-solid interfaces, ORDER-disorder models, QUANTUM tunneling, METHANE
Abstract

Methane has been matrix isolated in solid Arc(N2)1-c, 0≤c≤1. Neutron spectra and diffractograms from identical samples are reported. In addition vapor-deposited argon and its mixtures with methane and nitrogen were studied by low temperature x-ray powder diffraction. The diffractograms and spectra were interpreted in terms of five different types of sites (I–V) in the vapor-deposited matrix after deposition at temperatures of 7–25 K. Shifts and broadenings of the methane tunneling spectra are caused by these sites: (I) Methane in regular fcc substitutional sites of solid pure argon or pure nitrogen in thermodynamic equilibrium shows nearly free rotation. The effective hindrance potential in nitrogen is lower than that in argon. In earlier IR-absorption work a site splitting of the vibrations was assigned as a splitting of the J=1 level of methane. INS shows that the latter is smaller than 0.030 meV. (II) Due to the nonequilibrium conditions during vapor-deposition, stacking faults and grains with hcp symmetry are formed both in pure argon and krypton, but not in pure nitrogen. Rather sharp lines in the methane spectra at 0.6 meV neutron energy transfer are assigned to such sites. (III) Argon and nitrogen form solid mixtures with an fcc structure in the argon rich phase (c≥0.45). By the addition of nitrogen the concentration of stacking faults and grains with hcp structure is enhanced. Both the peaks at 0.9 and at 0.6 meV are seen without major shift or broadening compared to the spectra of methane in pure argon. (IV) In nitrogen rich mixtures (c≤0.45) broad features in the energy range below 1 meV are observed. They are fitted by a simple mean field model.The fit shows that replacing of nitrogen next neighbors of a methane molecule by argon atoms strongly enhances the hindrance potential in this concentration range. (V) A major amount of the argon and krypton matrices is strongly distorted and has a very small... [ABSTRACT FROM AUTHOR]

Published
1993
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33. Rotational motions of CH4 molecules in weak orientational potentials of cubic symmetry.

Author

Asmussen, B., Prager, M., Press, W., Blank, H., and Carlile, C. J.

Subjects
ROTATIONAL motion, METHANE, MOLECULES
Abstract

Nearly free rotational motions of CH4 molecules as substitutional impurities in argon, krypton, and xenon have been observed at low temperatures with inelastic neutron scattering. Besides energy transfer, the dependence of the scattered intensities on momentum transfer Q is used for the assignment of the experimentally observed lines to the various transitions of a spherical quantumrotor in an orientational potential of cubic symmetry. The measured intensities are in good agreement with theoretical predictions based on the extended James–Keenan model. Measurements with high energy resolution on solid CH4 in its antiferrorotational phase II were devoted to the determination of the Q dependence of the tunneling lines and the nearly free rotor lines. The results give the first direct experimental evidence for the value 3 for the ratio of the orientationally ordered molecules to those which are orientationally disordered in CH4-II. [ABSTRACT FROM AUTHOR]

Published
1992
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34. Rotational spectra and the phase diagram of CH4/Ar mixtures.

Author

Prager, M., Asmussen, B., Press, W., Blank, H., and Carlile, C. J.

Subjects
CARBON compounds, HYDROGEN, PHASE diagrams, ARGON
Abstract

The rotational dynamics, i.e., tunneling and almost free quantum rotation at low temperature and rotational diffusion at higher temperature, have been studied in methane–argon mixtures in the whole concentration range and at temperatures up to T=40 K. Changes of the rotational spectra allow parts of the phase diagram to be established in detail. At T=5 K, a transition from a perturbed partially ordered phase II to be a disordered glassy phase has been observed at an argon concentration of 10%. There is a small regime of coexistence of these two phases. The miscibility gap at larger argon concentrations is wider than determined by x-ray diffraction with methane being almost insoluble in argon. [ABSTRACT FROM AUTHOR]

Published
1991
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