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1. Search for $hep$ solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory

Author

Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Blucher, E., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kraus, C., Krauss, C. B., Krüger, A., Kutter, T., Kyba, C. C. M., Labe, K., Land, B. J., Lange, R., LaTorre, A., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tešić, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

A search has been performed for neutrinos from two sources, the $hep$ reaction in the solar $pp$ fusion chain and the $\nu_e$ component of the diffuse supernova neutrino background (DSNB), using the full dataset of the Sudbury Neutrino Observatory with a total exposure of 2.47 kton-years after fiducialization. The $hep$ search is performed using both a single-bin counting analysis and a likelihood fit. We find a best-fit flux that is compatible with solar model predictions while remaining consistent with zero flux, and set a one-sided upper limit of $\Phi_{hep} < 30\times10^{3}~\mathrm{cm}^{-2}~\mathrm{s}^{-1}$ [90% credible interval (CI)]. No events are observed in the DSNB search region, and we set an improved upper bound on the $\nu_e$ component of the DSNB flux of $\Phi^\mathrm{DSNB}_{\nu_e} < 19~\textrm{cm}^{-2}~\textrm{s}^{-1}$ (90% CI) in the energy range $22.9 < E_\nu < 36.9$~MeV., Comment: 11 pages, 6 figures

Published
2020
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2. Cosmogenic Neutron Production at the Sudbury Neutrino Observatory

Author

Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Curley, R., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Kéfélian, C., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kr\u, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Land, B. J., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Teš, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

Neutrons produced in nuclear interactions initiated by cosmic-ray muons present an irreducible background to many rare-event searches, even in detectors located deep underground. Models for the production of these neutrons have been tested against previous experimental data, but the extrapolation to deeper sites is not well understood. Here we report results from an analysis of cosmogenically produced neutrons at the Sudbury Neutrino Observatory. A specific set of observables are presented, which can be used to benchmark the validity of GEANT4 physics models. In addition, the cosmogenic neutron yield, in units of $10^{-4}\;\text{cm}^{2}/\left(\text{g}\cdot\mu\right)$, is measured to be $7.28 \pm 0.09\;\text{stat.} ^{+1.59}_{-1.12}\;\text{syst.}$ in pure heavy water and $7.30 \pm 0.07\;\text{stat.} ^{+1.40}_{-1.02}\;\text{syst.}$ in NaCl-loaded heavy water. These results provide unique insights into this potential background source for experiments at SNOLAB.

Published
2019
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3. Measurement of neutron production in atmospheric neutrino interactions at the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kruger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Land, B. J., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Singh, J., Skensved, P., Smiley, M., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
High Energy Physics - Experiment
Abstract

Neutron production in GeV-scale neutrino interactions is a poorly studied process. We have measured the neutron multiplicities in atmospheric neutrino interactions in the Sudbury Neutrino Observatory experiment and compared them to the prediction of a Monte Carlo simulation using GENIE and a minimally modified version of GEANT4. We analyzed 837 days of exposure corresponding to Phase I, using pure heavy water, and Phase II, using a mixture of Cl in heavy water. Neutrons produced in atmospheric neutrino interactions were identified with an efficiency of $15.3\%$ and $44.3\%$, for Phase I and II respectively. The neutron production is measured as a function of the visible energy of the neutrino interaction and, for charged current quasi-elastic interaction candidates, also as a function of the neutrino energy. This study is also performed classifying the complete sample into two pairs of event categories: charged current quasi-elastic and non charged current quasi-elastic, and $\nu_{\mu}$ and $\nu_e$. Results show good overall agreement between data and Monte Carlo for both phases, with some small tension with a statistical significance below $2\sigma$ for some intermediate energies.

Published
2019
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4. Search for hep solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory

Author

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Blucher, E, Bonventre, R, Boudjemline, K, Boulay, MG, Cai, B, Callaghan, EJ, Caravaca, J, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Dai, X, Deng, H, Descamps, FB, Detwiler, JA, Doe, PJ, Doucas, G, Drouin, PL, Dunford, M, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Gilje, K, Goon, JTM, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Huang, M, Jagam, P, Jamieson, B, Jelley, NA, Jerkins, M, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Kraus, C, Krauss, CB, Krüger, A, Kutter, T, Kyba, CCM, Labe, K, Land, BJ, Lange, R, Latorre, A, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, Maclellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, RD, Mastbaum, A, McCauley, N, McDonald, AB, McGee, SR, Miller, ML, Monreal, B, Monroe, J, Nickel, BG, Noble, AJ, O'Keeffe, HM, Oblath, NS, Okada, CE, Ollerhead, RW, Orebi Gann, GD, Oser, SM, Ott, RA, Peeters, SJM, and Poon, AWP

Subjects
hep-ex, nucl-ex
Abstract

A search has been performed for neutrinos from two sources, the hep reaction in the solar pp fusion chain and the νe component of the diffuse supernova neutrino background (DSNB), using the full dataset of the Sudbury Neutrino Observatory with a total exposure of 2.47 kton-years after fiducialization. The hep search is performed using both a single-bin counting analysis and a likelihood fit. We find a best-fit flux that is compatible with solar model predictions while remaining consistent with zero flux, and set a one-sided upper limit of φhep

Published
2020

5. Constraints on Neutrino Lifetime from the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Kéfélian, C., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Krüger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Land, B. J., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tešić, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The long baseline between the Earth and the Sun makes solar neutrinos an excellent test beam for exploring possible neutrino decay. The signature of such decay would be an energy-dependent distortion of the traditional survival probability which can be fit for using well-developed and high precision analysis methods. Here a model including neutrino decay is fit to all three phases of $^8$B solar neutrino data taken by the Sudbury Neutrino Observatory. This fit constrains the lifetime of neutrino mass state $\nu_2$ to be ${>8.08\times10^{-5}}$ s/eV at $90\%$ confidence. An analysis combining this SNO result with those from other solar neutrino experiments results in a combined limit for the lifetime of mass state $\nu_2$ of ${>1.04\times10^{-3}}$ s/eV at $99\%$ confidence.

Published
2018
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6. Cosmogenic neutron production at the Sudbury Neutrino Observatory

Author

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Bonventre, R, Boudjemline, K, Boulay, MG, Cai, B, Callaghan, EJ, Caravaca, J, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Curley, R, Dai, X, Deng, H, Descamps, FB, Detwiler, JA, Doe, PJ, Doucas, G, Drouin, PL, Dunford, M, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Gilje, K, Goon, JTM, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Huang, M, Jagam, P, Jamieson, B, Jelley, NA, Jerkins, M, Kéfélian, C, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Krüger, A, Kraus, C, Krauss, CB, Kutter, T, Kyba, CCM, Land, BJ, Lange, R, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, MacLellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, RD, Mastbaum, A, McCauley, N, McDonald, AB, McGee, SR, Miller, ML, Monreal, B, Monroe, J, Nickel, BG, Noble, AJ, O'Keeffe, HM, Oblath, NS, Okada, CE, Ollerhead, RW, Orebi Gann, GD, Oser, SM, Ott, RA, Peeters, SJM, Poon, AWP, and Prior, G

Subjects
hep-ex, nucl-ex
Abstract

Neutrons produced in nuclear interactions initiated by cosmic-ray muons present an irreducible background to many rare-event searches, even in detectors located deep underground. Models for the production of these neutrons have been tested against previous experimental data, but the extrapolation to deeper sites is not well understood. Here we report results from an analysis of cosmogenically produced neutrons at the Sudbury Neutrino Observatory. A specific set of observables are presented, which can be used to benchmark the validity of geant4 physics models. In addition, the cosmogenic neutron yield, in units of 10-4 cm2/(g·μ), is measured to be 7.28±0.09(stat)-1.12+1.59(syst) in pure heavy water and 7.30±0.07(stat)-1.02+1.40(syst) in NaCl-loaded heavy water. These results provide unique insights into this potential background source for experiments at SNOLAB.

Published
2019

7. Tests of Lorentz invariance at the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Blucher, E., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Kefelian, C., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kruger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Labe, K., Land, B. J., Lange, R., LaTorre, A., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Winchester, T., Wilson, J. R., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

Experimental tests of Lorentz symmetry in systems of all types are critical for ensuring that the basic assumptions of physics are well-founded. Data from all phases of the Sudbury Neutrino Observatory, a kiloton-scale heavy water Cherenkov detector, are analyzed for possible violations of Lorentz symmetry in the neutrino sector. Such violations would appear as one of eight possible signal types in the detector: six seasonal variations in the solar electron neutrino survival probability differing in energy and time dependence, and two shape changes to the oscillated solar neutrino energy spectrum. No evidence for such signals is observed, and limits on the size of such effects are established in the framework of the Standard Model Extension, including 40 limits on perviously unconstrained operators and improved limits on 15 additional operators. This makes limits on all minimal, Dirac-type Lorentz violating operators in the neutrino sector available for the first time.

Published
2018
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8. Measurement of neutron production in atmospheric neutrino interactions at the Sudbury Neutrino Observatory

Author

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Bonventre, R, Boudjemline, K, Boulay, MG, Cai, B, Callaghan, EJ, Caravaca, J, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Dai, X, Deng, H, Descamps, FB, Detwiler, JA, Doe, PJ, Doucas, G, Drouin, P-L, Dunford, M, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Gilje, K, Goon, JTM, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Huang, M, Jagam, P, Jamieson, B, Jelley, NA, Jerkins, M, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Kruger, A, Kraus, C, Krauss, CB, Kutter, T, Kyba, CCM, Land, BJ, Lange, R, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, MacLellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, RD, Mastbaum, A, McCauley, N, McDonald, AB, McGee, SR, Miller, ML, Monreal, B, Monroe, J, Nickel, BG, Noble, AJ, O'Keeffe, HM, Oblath, NS, Okada, CE, Ollerhead, RW, Gann, GD Orebi, Oser, SM, Ott, RA, Peeters, SJM, Poon, AWP, Prior, G, Reitzner, SD, and Rielage, K

Subjects
hep-ex
Abstract

Neutron production in GeV-scale neutrino interactions is a poorly studiedprocess. We have measured the neutron multiplicities in atmospheric neutrinointeractions in the Sudbury Neutrino Observatory experiment and compared themto the prediction of a Monte Carlo simulation using GENIE and a minimallymodified version of GEANT4. We analyzed 837 days of exposure corresponding toPhase I, using pure heavy water, and Phase II, using a mixture of Cl in heavywater. Neutrons produced in atmospheric neutrino interactions were identifiedwith an efficiency of $15.3\%$ and $44.3\%$, for Phase I and II respectively.The neutron production is measured as a function of the visible energy of theneutrino interaction and, for charged current quasi-elastic interactioncandidates, also as a function of the neutrino energy. This study is alsoperformed classifying the complete sample into two pairs of event categories:charged current quasi-elastic and non charged current quasi-elastic, and$\nu_{\mu}$ and $\nu_e$. Results show good overall agreement between data andMonte Carlo for both phases, with some small tension with a statisticalsignificance below $2\sigma$ for some intermediate energies.

Published
2019

9. Constraints on neutrino lifetime from the Sudbury Neutrino Observatory

Author

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Bonventre, R, Boudjemline, K, Boulay, MG, Cai, B, Callaghan, EJ, Caravaca, J, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Dai, X, Deng, H, Descamps, FB, Detwiler, JA, Doe, PJ, Doucas, G, Drouin, P-L, Dunford, M, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Gilje, K, Goon, J TM, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Huang, M, Jagam, P, Jamieson, B, Jelley, NA, Jerkins, M, Kéfélian, C, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Krüger, A, Kraus, C, Krauss, CB, Kutter, T, Kyba, CCM, Land, BJ, Lange, R, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, MacLellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, RD, Mastbaum, A, McCauley, N, McDonald, AB, McGee, SR, Miller, ML, Monreal, B, Monroe, J, Nickel, BG, Noble, AJ, O’Keeffe, HM, Oblath, NS, Okada, CE, Ollerhead, RW, Gann, GD Orebi, Oser, SM, Ott, RA, Peeters, SJM, Poon, AWP, Prior, G, and Reitzner, SD

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, hep-ex, nucl-ex
Abstract

The long baseline between Earth and the Sun makes solar neutrinos an excellent test beam for exploring possible neutrino decay. The signature of such decay would be an energy-dependent distortion of the traditional survival probability which can be fit for using well-developed and high-precision analysis methods. Here a model including neutrino decay is fit to all three phases of B8 solar neutrino data taken by the Sudbury Neutrino Observatory (SNO). This fit constrains the lifetime of neutrino mass state ν2 to be >8.08×10-5 s/eV at 90% confidence. An analysis combining this SNO result with those from other solar neutrino experiments results in a combined limit for the lifetime of mass state ν2 of >1.92×10-3 s/eV at 90% confidence.

Published
2019

10. Tests of Lorentz invariance at the Sudbury Neutrino Observatory

Author

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Blucher, E, Bonventre, R, Boudjemline, K, Boulay, MG, Cai, B, Callaghan, EJ, Caravaca, J, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Dai, X, Deng, H, Descamps, FB, Detwiler, JA, Doe, PJ, Doucas, G, Drouin, P-L, Dunford, M, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Gilje, K, Goon, J TM, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Huang, M, Jagam, P, Jamieson, B, Jelley, NA, Jerkins, M, Kéfélian, C, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Krüger, A, Kraus, C, Krauss, CB, Kutter, T, Kyba, CCM, Labe, K, Land, BJ, Lange, R, LaTorre, A, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, MacLellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, RD, Mastbaum, A, McCauley, N, McDonald, AB, McGee, SR, Miller, ML, Monreal, B, Monroe, J, Nickel, BG, Noble, AJ, O’Keeffe, HM, Oblath, NS, Okada, CE, Ollerhead, RW, Gann, GD Orebi, Oser, SM, Ott, RA, and Peeters, SJM

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, hep-ex, nucl-ex
Abstract

Experimental tests of Lorentz symmetry in systems of all types are critical for ensuring that the basic assumptions of physics are well founded. Data from all phases of the Sudbury Neutrino Observatory, a kiloton-scale heavy water Cherenkov detector, are analyzed for possible violations of Lorentz symmetry in the neutrino sector. Such violations would appear as one of eight possible signal types in the detector: six seasonal variations in the solar electron neutrino survival probability differing in energy and time dependence and two shape changes to the oscillated solar neutrino energy spectrum. No evidence for such signals is observed, and limits on the size of such effects are established in the framework of the standard model extension, including 38 limits on previously unconstrained operators and improved limits on 16 additional operators. This makes limits on all minimal, Dirac-type Lorentz violating operators in the neutrino sector available for the first time.

Published
2018

11. The search for neutron-antineutron oscillations at the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kruger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., OrebiGann, G. D., Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Simpson, J. J., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

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

Tests on $B-L$ symmetry breaking models are important probes to search for new physics. One proposed model with $\Delta(B-L)=2$ involves the oscillations of a neutron to an antineutron. In this paper a new limit on this process is derived for the data acquired from all three operational phases of the Sudbury Neutrino Observatory experiment. The search was concentrated in oscillations occurring within the deuteron, and 23 events are observed against a background expectation of 30.5 events. These translate to a lower limit on the nuclear lifetime of $1.48\times 10^{31}$ years at 90% confidence level (CL) when no restriction is placed on the signal likelihood space (unbounded). Alternatively, a lower limit on the nuclear lifetime was found to be $1.18\times 10^{31}$ years at 90% CL when the signal was forced into a positive likelihood space (bounded). Values for the free oscillation time derived from various models are also provided in this article. This is the first search for neutron-antineutron oscillation with the deuteron as a target., Comment: 14 pages, 8 figures

Published
2017
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12. Search for neutron-Antineutron oscillations at the Sudbury Neutrino Observatory

Author

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Boudjemline, K, Boulay, MG, Cai, B, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Dai, X, Deng, H, Detwiler, JA, Doe, PJ, Doucas, G, Drouin, PL, Duncan, FA, Dunford, M, Earle, ED, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Goon, JT, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Huang, M, Jagam, P, Jamieson, B, Jelley, NA, Jerkins, M, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Krüger, A, Kraus, C, Krauss, CB, Kutter, T, Kyba, CCM, Lange, R, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, Maclellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, RD, McCauley, N, McDonald, AB, McGee, SR, Miller, ML, Monreal, B, Monroe, J, Nickel, BG, Noble, AJ, O'Keeffe, HM, Oblath, NS, Okada, CE, Ollerhead, RW, Orebi Gann, GD, Oser, SM, Ott, RA, Peeters, SJM, Poon, AWP, Prior, G, Reitzner, SD, Rielage, K, Robertson, BC, Robertson, RGH, Schwendener, MH, Secrest, JA, and Seibert, SR

Subjects
hep-ex, nucl-ex, physics.ins-det
Abstract

Tests on B-L symmetry breaking models are important probes to search for new physics. One proposed model with Δ(B-L)=2 involves the oscillations of a neutron to an antineutron. In this paper, a new limit on this process is derived for the data acquired from all three operational phases of the Sudbury Neutrino Observatory experiment. The search concentrated on oscillations occurring within the deuteron, and 23 events were observed against a background expectation of 30.5 events. These translated to a lower limit on the nuclear lifetime of 1.48×1031 yr at 90% C.L. when no restriction was placed on the signal likelihood space (unbounded). Alternatively, a lower limit on the nuclear lifetime was found to be 1.18×1031 yr at 90% C.L. when the signal was forced into a positive likelihood space (bounded). Values for the free oscillation time derived from various models are also provided in this article. This is the first search for neutron-Antineutron oscillation with the deuteron as a target.

Published
2017

13. Measurement of Ratios of $\nu_{\mu}$ Charged-Current Cross Sections on C, Fe, and Pb to CH at Neutrino Energies 2-20 GeV

Author

Tice, B. G., Datta, M., Mousseau, J., Aliaga, L., Altinok, O., Sazo, M. G. Barrios, Betancourt, M., Bodek, A., Bravar, A., Brooks, W. K., Budd, H., Bustamante, M. J., Butkevich, A., Caicedo, D. A. Martinez, Castromonte, C. M., Christy, M. E., Chvojka, J., da Motta, H., Devan, J., Dytman, S. A., Díaz, G. A., Eberly, B., Felix, J., Fields, L., Fiorentini, G. A., Gago, A. M., Gallagher, H., Gran, R., Harris, D. A., Higuera, A., Hurtado, K., Jerkins, M., Kafka, T., Kordosky, M., Kulagin, S. A., Le, T., Maggi, G., Maher, E., Manly, S., Mann, W. A., Marshall, C. M., Mari, C. Martin, McFarland, K. S., McGivern, C. L., McGowan, A. M., Miller, J., Mislivec, A., Morfín, J. G., Muhlbeier, T., Naples, D., Nelson, J. K., Norrick, A., Osta, J., Palomino, J. L., Paolone, V., Park, J., Patrick, C. E., Perdue, G. N., Rakotondravohitra, L., Ransome, R. D., Ray, H., Ren, L., Rodrigues, P. A., Savage, D. G., Schellman, H., Schmitz, D. W., Simon, C., Snider, F. D., Salinas, C. J. Solano, Tagg, N., Valencia, E., Velásquez, J. P., Walton, T., Wolcott, J., Zavala, G., Zhang, D., and Ziemer, B. P.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

We present measurements of $\nu_{\mu}$ charged-current cross section ratios on carbon, iron, and lead relative to a scintillator (CH) using the fine-grained MINERvA detector exposed to the NuMI neutrino beam at Fermilab. The measurements utilize events of energies $2=8~GeV$, which have a reconstructed $\mu^{-}$ scattering angle less than $17^\circ$ to extract ratios of inclusive total cross sections as a function of neutrino energy $E_{\nu}$ and flux-integrated differential cross sections with respect to the Bjorken scaling variable $x$. These results provide the first high-statistics direct measurements of nuclear effects in neutrino scattering using different targets in the same neutrino beam. Measured cross section ratios exhibit a relative depletion at low $x$ and enhancement at large $x$. Both become more pronounced as the nucleon number of the target nucleus increases. The data are not reproduced by GENIE, a conventional neutrino-nucleus scattering simulation, or by the alternative models for the nuclear dependence of inelastic scattering that are considered., Comment: 6 pages, 2 figures, 7 pages of supplemental material. Published in Physical Review Letters June 13, 2014

Published
2014
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14. A Search for Astrophysical Burst Signals at the Sudbury Neutrino Observatory

Author

Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., DiMarco, M., Diamond, M. D., Doe, P. J., Doucas, G., Drouin, P. -L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kraus, C., Krauss, C. B., Krueger, A., Kutter, T., Kyba, C. C. M., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Simpson, J. J., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Watson, P. J. S., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Wouters, J. M., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Nuclear Experiment
Abstract

The Sudbury Neutrino Observatory (SNO) has confirmed the standard solar model and neutrino oscillations through the observation of neutrinos from the solar core. In this paper we present a search for neutrinos associated with sources other than the solar core, such as gamma-ray bursters and solar flares. We present a new method for looking for temporal coincidences between neutrino events and astrophysical bursts of widely varying intensity. No correlations were found between neutrinos detected in SNO and such astrophysical sources.

Published
2013
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15. Design, Calibration, and Performance of the MINERvA Detector

Author

Aliaga, L., Bagby, L., Baldin, B., Baumbaugh, A., Bodek, A., Bradford, R., Brooks, W. K., Boehnlein, D., Boyd, S., Budd, H., Butkevich, A., Caicedo, D. A. Martinez, Castromonte, C. M., Christy, M. E., Chvojka, J., da Motta, H., Damiani, D. S., Danko, I., Datta, M., DeMaat, R., Devan, J., Draeger, E., Dytman, S. A., Diaz, G. A., Eberly, B., Edmondson, D. A., Felix, J., Fields, L., Fiorentini, G. A., Gago, A. M., Gallagher, H., George, C. A., Gingu, C., Gobbi, B., Gran, R., Grossman, N., Harris, D. A., Heaton, J., Higuera, A., Hobbs, J. A., Howley, I. J., Hurtado, K., Jerkins, M., Kafka, T., Kantner, M. O., Keppel, C., Kilmer, J., Krajeski, A. H., Lee, H., Leister, A. G., Locke, G., Maggi, G., Maher, E., Manly, S., Mann, W. A., Marshall, C. M., McFarland, K. S., McGivern, C. L., McGowan, A. M., Morfin, J. G., Mousseau, J., Naples, D., Nelson, J. K., Niculescu, G., Niculescu, I., O'Connor, C. D., Ochoa, N., Olsen, J., Osmanov, B., Osta, J., Palomino, J. L., Paolone, V., Park, J., Perdue, G. N., Pena, C., Pla-Dalmau, A., Rakotondravohitra, L., Ransome, R. D., Ray, H., Ren, L., Rubinov, P., Rude, C., Sassin, K. E., Schellman, H., Schmitz, D. W., Schneider, R. M., Simon, C., Snider, F. D., Snyder, M. C., Salinas, C. J. Solano, Tagg, N., Tice, B. G., Tilden, R. N., Tzanakos, G., Velasquez, J. P., Walton, T., Westerberg, A., Wolcott, J., Wolthuis, B. A., Woodward, N., Wytock, T., Zavala, G., Zhang, D., Zhu, L. Y., and Ziemer, B. P.

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

The MINERvA experiment is designed to perform precision studies of neutrino-nucleus scattering using $\nu_\mu$ and ${\bar\nu}_\mu$ neutrinos incident at 1-20 GeV in the NuMI beam at Fermilab. This article presents a detailed description of the \minerva detector and describes the {\em ex situ} and {\em in situ} techniques employed to characterize the detector and monitor its performance. The detector is comprised of a finely-segmented scintillator-based inner tracking region surrounded by electromagnetic and hadronic sampling calorimetry. The upstream portion of the detector includes planes of graphite, iron and lead interleaved between tracking planes to facilitate the study of nuclear effects in neutrino interactions. Observations concerning the detector response over sustained periods of running are reported. The detector design and methods of operation have relevance to future neutrino experiments in which segmented scintillator tracking is utilized.

Published
2013
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16. Measurement of Muon Neutrino Quasi-Elastic Scattering on a Hydrocarbon Target at E_{\nu} ~ 3.5 GeV

Author

The MINERvA collaboration, Fiorentini, G. A., Schmitz, D. W., Rodrigues, P. A., Aliaga, L., Altinok, O., Baldin, B., Baumbaugh, A., Bodek, A., Boehnlein, D., Boyd, S., Bradford, R., Brooks, W. K., Budd, H., Butkevich, A., Caicedo, D. A. Martinez, Castromonte, C. M., Christy, M. E., Chung, H., Chvojka, J., Clark, M., da Motta, H., Damiani, D. S., Danko, I., Datta, M., Day, M., DeMaat, R., Devan, J., Draeger, E., Dytman, S. A., Díaz, G. A., Eberly, B., Edmondson, D. A., Felix, J., Fitzpatrick, T., Fields, L., Gago, A. M., Gallagher, H., George, C. A., Gielata, J. A., Gingu, C., Gobbi, B., Gran, R., Grossman, N., Hanson, J., Harris, D. A., Heaton, J., Higuera, A., Howley, I. J., Hurtado, K., Jerkins, M., Kafka, T., Kaisen, J., Kanter, M. O., Keppel, C. E., Kilmer, J., Kordosky, M., Krajeski, A. H., Kulagin, S. A., Le, T., Lee, H., Leister, A. G., Locke, G., Maggi, G., Maher, E., Manly, S., Mann, W. A., Marshall, C. M., McFarland, K. S., McGivern, C. L., McGowan, A. M., Mislivec, A., Morfń, J. G., Mousseau, J., Naples, D., Nelson, J. K., Niculescu, G., Niculescu, I., Ochoa, N., O'Connor, C. D., Olsen, J., Osmanov, B., Osta, J., Palomino, J. L., Paolone, V., Park, J., Patrick, C. E., Perdue, G. N., Peña, C., Rakotondravohitra, L., Ransome, R. D., Ray, H., Ren, L., Rude, C., Sassin, K. E., Schellman, H., Schneider, R. M., Schulte, E. C., Simon, C., Snider, F. D., Snyder, M. C., Sobczyk, J. T., Salinas, C. J. Solano, Tagg, N., Tan, W., Tice, B. G., Tzanakos, G., Velásquez, J. P., Walding, J., Walton, T., Wolcott, J., Wolthuis, B. A., Woodward, N., Zavala, G., Zeng, H. B., Zhang, D., Zhu, L. Y., and Ziemer, B. P.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

We report a study of muon neutrino charged-current quasi-elastic events in the segmented scintillator inner tracker of the MINERvA experiment running in the NuMI neutrino beam at Fermilab. The events were selected by requiring a {\mu}^- and low calorimetric recoil energy separated from the interaction vertex. We measure the flux-averaged differential cross-section, d{\sigma}/dQ^2, and study the low energy particle content of the final state. Deviations are found between the measured d{\sigma}/dQ^2 and the expectations of a model of independent nucleons in a relativistic Fermi gas. We also observe an excess of energy near the vertex consistent with multiple protons in the final state., Comment: 7 pages, 5 figures. Added correlation between neutrino and anti-neutrino result in ancillary files (CSV)

Published
2013
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17. Measurement of Muon Antineutrino Quasi-Elastic Scattering on a Hydrocarbon Target at E_{\nu} ~ 3.5 GeV

Author

The MINERvA collaboration, Fields, L., Chvojka, J., Aliaga, L., Altinok, O., Baldin, B., Baumbaugh, A., Bodek, A., Boehnlein, D., Boyd, S., Bradford, R., Brooks, W. K., Budd, H., Butkevich, A., Caicedo, D. A. Martinez, Castromonte, C. M., Christy, M. E., Chung, H., Clark, M., da Motta, H., Damiani, D. S., Danko, I., Datta, M., Day, M., DeMaat, R., Devan, J., Draeger, E., Dytman, S. A., Díaz, G. A., Eberly, B., Edmondson, D. A., Felix, J., Fitzpatrick, T., Fiorentini, G. A., Gago, A. M., Gallagher, H., George, C. A., Gielata, J. A., Gingu, C., Gobbi, B., Gran, R., Grossman, N., Hanson, J., Harris, D. A., Heaton, J., Higuera, A., Howley, I. J., Hurtado, K., Jerkins, M., Kafka, T., Kaisen, J., Kanter, M. O., Keppel, C. E., Kilmer, J., Kordosky, M., Krajeski, A. H., Kulagin, S. A., Le, T., Lee, H., Leister, A. G., Locke, G., Maggi, G., Maher, E., Manly, S., Mann, W. A., Marshall, C. M., McFarland, K. S., McGivern, C. L., McGowan, A. M., Mislivec, A., Morfín, J. G., Mousseau, J., Naples, D., Nelson, J. K., Niculescu, G., Niculescu, I., Ochoa, N., O'Connor, C. D., Olsen, J., Osmanov, B., Osta, J., Palomino, J. L., Paolone, V., Park, J., Patrick, C. E., Perdue, G. N., Peña, C., Rakotondravohitra, L., Ransome, R. D., Ray, H., Ren, L., Rodrigues, P. A., Rude, C., Sassin, K. E., Schellman, H., Schmitz, D. W., Schneider, R. M., Schulte, E. C., Simon, C., Snider, F. D., Snyder, M. C., Sobczyk, J. T., Salinas, C. J. Solano, Tagg, N., Tan, W., Tice, B. G., Tzanakos, G., Velásquez, J. P., Walding, J., Walton, T., Wolcott, J., Wolthuis, B. A., Woodward, N., Zavala, G., Zeng, H. B., Zhang, D., Zhu, L. Y., and Ziemer, B. P.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

We have isolated muon anti-neutrino charged-current quasi-elastic interactions occurring in the segmented scintillator tracking region of the MINERvA detector running in the NuMI neutrino beam at Fermilab. We measure the flux-averaged differential cross-section, d{\sigma}/dQ^2, and compare to several theoretical models of quasi-elastic scattering. Good agreement is obtained with a model where the nucleon axial mass, M_A, is set to 0.99 GeV/c^2 but the nucleon vector form factors are modified to account for the observed enhancement, relative to the free nucleon case, of the cross-section for the exchange of transversely polarized photons in electron-nucleus scattering. Our data at higher Q^2 favor this interpretation over an alternative in which the axial mass is increased., Comment: 8 pages, 5 figures. Added correlation between neutrino and anti-neutrino results in ancillary text files (CSV)

Published
2013
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18. Combined Analysis of all Three Phases of Solar Neutrino Data from the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., DiMarco, M., Doe, P. J., Doucas, G., Drouin, P. -L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kraus, C., Krauss, C. B., Kruger, A, Kutter, T., Kyba, C. C. M., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Rosten, R. C., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Simpson, J. J., Skensved, P., Sonley, T. J., Stonehill, L. C., Tešić, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Tseung, H. Wan Chan, Wark, D. L., Watson, P. J. S., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Wouters, J. M., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
Nuclear Experiment, Astrophysics - Solar and Stellar Astrophysics, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We report results from a combined analysis of solar neutrino data from all phases of the Sudbury Neutrino Observatory. By exploiting particle identification information obtained from the proportional counters installed during the third phase, this analysis improved background rejection in that phase of the experiment. The combined analysis resulted in a total flux of active neutrino flavors from 8B decays in the Sun of (5.25 \pm 0.16(stat.)+0.11-0.13(syst.))\times10^6 cm^{-2}s^{-1}. A two-flavor neutrino oscillation analysis yielded \Deltam^2_{21} = (5.6^{+1.9}_{-1.4})\times10^{-5} eV^2 and tan^2{\theta}_{12}= 0.427^{+0.033}_{-0.029}. A three-flavor neutrino oscillation analysis combining this result with results of all other solar neutrino experiments and the KamLAND experiment yielded \Deltam^2_{21} = (7.41^{+0.21}_{-0.19})\times10^{-5} eV^2, tan^2{\theta}_{12} = 0.446^{+0.030}_{-0.029}, and sin^2{\theta}_{13} = (2.5^{+1.8}_{-1.5})\times10^{-2}. This implied an upper bound of sin^2{\theta}_{13} < 0.053 at the 95% confidence level (C.L.).

Published
2011
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19. Single Photon Atomic Sorting: Isotope Separation with Maxwell's Demon

Author

Jerkins, M., Chavez, I., Even, U., and Raizen, M. G.

Subjects
Physics - Atomic Physics, Physics - Atmospheric and Oceanic Physics
Abstract

Isotope separation is one of the grand challenges of modern society and holds great potential for basic science, medicine, energy, and defense. We consider here a new and general approach to isotope separation. The method is based on an irreversible change of the mass-to-magnetic moment ratio of a particular isotope in an atomic beam, followed by a magnetic multipole whose gradients deflect and guide the atoms. The underlying mechanism is a reduction of the entropy of the beam by the information of a single-scattered photon for each atom that is separated. We numerically simulate isotope separation for a range of examples, including lithium, for which we describe the experimental setup we are currently constructing. Simulations of other examples demonstrate this technique's general applicability to almost the entire periodic table. We show that the efficiency of the process is only limited by the available laser power, since one photon on average enables the separation of one atom. The practical importance of the proposed method is that large-scale isotope separation should be possible, using ordinary inexpensive magnets and the existing technologies of supersonic beams and lasers., Comment: 4 pages, 5 figures

Published
2010

20. Differential cross sections of the charge-exchange reaction pi- p --> pi0 n in the momentum range from 103 to 178 MeV/c

Author

Mekterović, D., Supek, I., Abaev, V., Bekrenev, V., Bircher, C., Briscoe, W. J., Cadman, R. V., Clajus, M., Comfort, J. R., Craig, K., Grosnick, D., Isenhover, D., Jerkins, M., Joy, M., Knecht, N., Koetke, D. D., Kozlenko, N., Kulbardis, A., Kruglov, S., Lolos, G., Lopatin, I., Manley, D. M., Manweiler, R., Marušić, A., McDonald, S., Nefkens, B. M. K., Olmsted, J., Papandreou, Z., Peaslee, D., Peterson, J., Phaisangittisakul, N., Prakhov, S. N., Price, J. W., Ramirez, A., Sadler, M. E., Shafi, A., Spinka, H., Stanislaus, S., Starostin, A., Staudenmaier, H. M., Strakovsky, I., Tippens, W. B., and Watson, S.

Subjects
High Energy Physics - Experiment
Abstract

Measured values of the differential cross sections for pion-nucleon charge exchange, pi- p --> pi0 n, are presented for pi- momenta of 103, 112, 120, 130, 139, 152, and 178 MeV/c. Complete angular distributions were obtained by using the Crystal Ball detector at the Alternating Gradient Synchrotron at Brookhaven National Laboratory. Statistical uncertainties of the differential cross sections vary from 3% to 6% in the backward angle region, and from 6% to about 20% in the forward region with the exception of the two most forward angles. The systematic uncertainties are estimated to be about 3% for all momenta., Comment: 18 pages, 12 figures, submitted to Phys. Rev. C

Published
2009
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21. Using Cold Atoms to Measure Neutrino Mass

Author

Jerkins, M., Klein, J. R., Majors, J. H., Robicheaux, F., and Raizen, M. G.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

We propose a beta decay experiment based on a sample of ultracold atomic tritium. These initial conditions enable detection of the helium ion in coincidence with the beta. We construct a two-dimensional fit incorporating both the shape of the beta-spectrum and the direct reconstruction of the neutrino mass peak. We present simulation results of the feasible limits on the neutrino mass achievable in this new type of tritium beta-decay experiment., Comment: 10 pages, 5 figures

Published
2009
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22. Measurement of neutron production in atmospheric neutrino interactions at the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kruger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Land, B. J., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Gann, G. D. Orebi, Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Singh, J., Skensved, P., Smiley, M., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
Heavy water, Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, FOS: Physical sciences, 01 natural sciences, Visible energy, High Energy Physics - Experiment, Nuclear physics, chemistry.chemical_compound, High Energy Physics - Experiment (hep-ex), chemistry, 0103 physical sciences, High Energy Physics::Experiment, ddc:530, Neutron, Production (computer science), Atmospheric neutrino, Neutrino, 010306 general physics, Nuclear Experiment, QC
Abstract

Author(s): Aharmim, B; Ahmed, SN; Anthony, AE; Barros, N; Beier, EW; Bellerive, A; Beltran, B; Bergevin, M; Biller, SD; Bonventre, R; Boudjemline, K; Boulay, MG; Cai, B; Callaghan, EJ; Caravaca, J; Chan, YD; Chauhan, D; Chen, M; Cleveland, BT; Cox, GA; Dai, X; Deng, H; Descamps, FB; Detwiler, JA; Doe, PJ; Doucas, G; Drouin, P-L; Dunford, M; Elliott, SR; Evans, HC; Ewan, GT; Farine, J; Fergani, H; Fleurot, F; Ford, RJ; Formaggio, JA; Gagnon, N; Gilje, K; Goon, JTM; Graham, K; Guillian, E; Habib, S; Hahn, RL; Hallin, AL; Hallman, ED; Harvey, PJ; Hazama, R; Heintzelman, WJ; Heise, J; Helmer, RL; Hime, A; Howard, C; Huang, M; Jagam, P; Jamieson, B; Jelley, NA; Jerkins, M; Keeter, KJ; Klein, JR; Kormos, LL; Kos, M; Kruger, A; Kraus, C; Krauss, CB; Kutter, T; Kyba, CCM; Land, BJ; Lange, R; Law, J; Lawson, IT; Lesko, KT; Leslie, JR; Levine, I; Loach, JC; MacLellan, R; Majerus, S; Mak, HB; Maneira, J; Martin, RD; Mastbaum, A; McCauley, N; McDonald, AB; McGee, SR; Miller, ML; Monreal, B | Abstract: Neutron production in GeV-scale neutrino interactions is a poorly studied process. We have measured the neutron multiplicities in atmospheric neutrino interactions in the Sudbury Neutrino Observatory experiment and compared them to the prediction of a Monte Carlo simulation using GENIE and a minimally modified version of GEANT4. We analyzed 837 days of exposure corresponding to Phase I, using pure heavy water, and Phase II, using a mixture of Cl in heavy water. Neutrons produced in atmospheric neutrino interactions were identified with an efficiency of $15.3\%$ and $44.3\%$, for Phase I and II respectively. The neutron production is measured as a function of the visible energy of the neutrino interaction and, for charged current quasi-elastic interaction candidates, also as a function of the neutrino energy. This study is also performed classifying the complete sample into two pairs of event categories: charged current quasi-elastic and non charged current quasi-elastic, and $\nu_{\mu}$ and $\nu_e$. Results show good overall agreement between data and Monte Carlo for both phases, with some small tension with a statistical significance below $2\sigma$ for some intermediate energies.

Published
2020

23. Cosmogenic neutron production at the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Curley, R., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P.-L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. T. M., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Kéfélian, C., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Krüger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Land, B. J., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O’Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Orebi Gann, G. D., Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tešić, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Wan Chan Tseung, H., Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Extrapolation, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), chemistry.chemical_compound, Neutron yield, Observatory, 0103 physical sciences, ddc:530, Neutron, Nuclear Experiment (nucl-ex), Nuclear Experiment, 010306 general physics, QC, Heavy water, Physics, Sudbury Neutrino Observatory, Muon, 010308 nuclear & particles physics, Observable, chemistry, High Energy Physics::Experiment
Abstract

Neutrons produced in nuclear interactions initiated by cosmic-ray muons present an irreducible background to many rare-event searches, even in detectors located deep underground. Models for the production of these neutrons have been tested against previous experimental data, but the extrapolation to deeper sites is not well understood. Here we report results from an analysis of cosmogenically produced neutrons at the Sudbury Neutrino Observatory. A specific set of observables are presented, which can be used to benchmark the validity of geant4 physics models. In addition, the cosmogenic neutron yield, in units of 10−4 cm2/(g·μ), is measured to be 7.28±0.09(stat)−1.12+1.59(syst) in pure heavy water and 7.30±0.07(stat)−1.02+1.40(syst) in NaCl-loaded heavy water. These results provide unique insights into this potential background source for experiments at SNOLAB.

Published
2019

24. Tests of Lorentz invariance at the Sudbury Neutrino Observatory

Author

Aharmim, B. (B.), Ahmed, S.N. (S. N.), Anthony, A.E. (A. E.), Barros, N. (N.), Beier, E.W. (E. W.), Bellerive, A. (Alain), Beltran, B. (B.), Bergevin, M. (M.), Biller, S.D. (S. D.), Blucher, E. (E.), Bonventre, R. (R.), Boudjemline, K. (K.), Boulay, M.G. (Mark Guy), Cai, B. (B.), Callaghan, E.J. (E. J.), Caravaca, J. (J.), Chan, Y.D. (Y. D.), Chauhan, D. (D.), Chen, M. (M.), Cleveland, B.T. (B. T.), Cox, G.A. (G. A.), Dai, X. (X.), Deng, H. (H.), Descamps, F.B. (F. B.), Detwiler, J.A. (J. A.), Doe, P.J. (P. J.), Doucas, G. (G.), Drouin, P.-L. (P. L.), Dunford, M. (M.), Elliott, S.R. (S. R.), Evans, H.C. (H. C.), Ewan, G.T. (G. T.), Farine, J. (J.), Fergani, H. (H.), Fleurot, F. (F.), Ford, R.J. (R. J.), Formaggio, J.A. (J. A.), Gagnon, N. (N.), Gilje, K. (K.), Goon, J.T. (J. Tm.), Graham, K. (K.), Guillian, E. (E.), Habib, S. (S.), Hahn, R.L. (R. L.), Hallin, A.L. (A. L.), Hallman, E.D. (E. D.), Harvey, P.J. (P. J.), Hazama, R. (R.), Heintzelman, W.J. (W. J.), Heise, J. (J.), Helmer, R.L. (R. L.), Hime, A. (A.), Howard, C. (C.), Huang, M. (M.), Jagam, P. (P.), Jamieson, B. (B.), Jelley, N.A. (N. A.), Jerkins, M. (M.), Kéfélian, C. (C.), Keeter, K.J. (K. J.), Klein, J.R. (J. R.), Kormos, L.L. (L. L.), Kos, M. (M.), Krüger, A. (A.), Kraus, C. (C.), Krauss, C.B. (C. B.), Kutter, T. (T.), Kyba, C.C.M. (C. C.M.), Labe, K. (K.), Land, B.J. (B. J.), Lange, R. (R.), Latorre, A. (A.), Law, J. (J.), Lawson, I.T. (I. T.), Lesko, K.T. (K. T.), Leslie, J.R. (J. R.), Levine, I. (I.), Loach, J.C. (J. C.), Maclellan, R. (R.), Majerus, S. (S.), Mak, H.B. (H. B.), Maneira, J. (J.), Martin, R.D. (R. D.), Mastbaum, A. (A.), McCauley, N. (N.), McDonald, A.B. (A. B.), McGee, S.R. (S. R.), Miller, M.L. (M. L.), Monreal, B. (B.), Monroe, J. (J.), Nickel, B.G. (B. G.), Noble, A.J. (A. J.), O'Keeffe, H.M. (H. M.), Oblath, N.S. (N. S.), Okada, C.E. (C. E.), Ollerhead, R.W. (R. W.), Orebi Gann, G.D. (G. D.), Oser, S.M. (S. M.), Ott, R.A. (R. A.), Peeters, S.J.M. (S. J.M.), Poon, A.W.P. (A. W.P.), Prior, G. (G.), Reitzner, S.D. (S. D.), Rielage, K. (K.), Robertson, B.C. (B. C.), Robertson, R.G.H. (R. G.H.), Schwendener, M.H. (M. H.), Secrest, J.A. (J. A.), Seibert, S.R. (S. R.), Simard, O. (O.), Sinclair, D. (D.), Skensved, P. (P.), Sonley, T.J. (T. J.), Stonehill, L.C. (L. C.), Tešić, G. (G.), Tolich, N. (N.), Tsui, T. (T.), Van Berg, R. (R.), Vandevender, B.A. (B. A.), Virtue, C.J. (C. J.), Wall, B.L. (B. L.), Waller, D. (D.), Wan Chan Tseung, H. (H.), Wark, D.L. (D. L.), Wendland, J. (J.), West, N. (N.), Wilkerson, J.F. (J. F.), Winchester, T. (T.), Wilson, J.R. (J. R.), Wright, A. (A.), Yeh, M. (M.), Zhang, F. (F.), Zuber, K. (K.), Aharmim, B. (B.), Ahmed, S.N. (S. N.), Anthony, A.E. (A. E.), Barros, N. (N.), Beier, E.W. (E. W.), Bellerive, A. (Alain), Beltran, B. (B.), Bergevin, M. (M.), Biller, S.D. (S. D.), Blucher, E. (E.), Bonventre, R. (R.), Boudjemline, K. (K.), Boulay, M.G. (Mark Guy), Cai, B. (B.), Callaghan, E.J. (E. J.), Caravaca, J. (J.), Chan, Y.D. (Y. D.), Chauhan, D. (D.), Chen, M. (M.), Cleveland, B.T. (B. T.), Cox, G.A. (G. A.), Dai, X. (X.), Deng, H. (H.), Descamps, F.B. (F. B.), Detwiler, J.A. (J. A.), Doe, P.J. (P. J.), Doucas, G. (G.), Drouin, P.-L. (P. L.), Dunford, M. (M.), Elliott, S.R. (S. R.), Evans, H.C. (H. C.), Ewan, G.T. (G. T.), Farine, J. (J.), Fergani, H. (H.), Fleurot, F. (F.), Ford, R.J. (R. J.), Formaggio, J.A. (J. A.), Gagnon, N. (N.), Gilje, K. (K.), Goon, J.T. (J. Tm.), Graham, K. (K.), Guillian, E. (E.), Habib, S. (S.), Hahn, R.L. (R. L.), Hallin, A.L. (A. L.), Hallman, E.D. (E. D.), Harvey, P.J. (P. J.), Hazama, R. (R.), Heintzelman, W.J. (W. J.), Heise, J. (J.), Helmer, R.L. (R. L.), Hime, A. (A.), Howard, C. (C.), Huang, M. (M.), Jagam, P. (P.), Jamieson, B. (B.), Jelley, N.A. (N. A.), Jerkins, M. (M.), Kéfélian, C. (C.), Keeter, K.J. (K. J.), Klein, J.R. (J. R.), Kormos, L.L. (L. L.), Kos, M. (M.), Krüger, A. (A.), Kraus, C. (C.), Krauss, C.B. (C. B.), Kutter, T. (T.), Kyba, C.C.M. (C. C.M.), Labe, K. (K.), Land, B.J. (B. J.), Lange, R. (R.), Latorre, A. (A.), Law, J. (J.), Lawson, I.T. (I. T.), Lesko, K.T. (K. T.), Leslie, J.R. (J. R.), Levine, I. (I.), Loach, J.C. (J. C.), Maclellan, R. (R.), Majerus, S. (S.), Mak, H.B. (H. B.), Maneira, J. (J.), Martin, R.D. (R. D.), Mastbaum, A. (A.), McCauley, N. (N.), McDonald, A.B. (A. B.), McGee, S.R. (S. R.), Miller, M.L. (M. L.), Monreal, B. (B.), Monroe, J. (J.), Nickel, B.G. (B. G.), Noble, A.J. (A. J.), O'Keeffe, H.M. (H. M.), Oblath, N.S. (N. S.), Okada, C.E. (C. E.), Ollerhead, R.W. (R. W.), Orebi Gann, G.D. (G. D.), Oser, S.M. (S. M.), Ott, R.A. (R. A.), Peeters, S.J.M. (S. J.M.), Poon, A.W.P. (A. W.P.), Prior, G. (G.), Reitzner, S.D. (S. D.), Rielage, K. (K.), Robertson, B.C. (B. C.), Robertson, R.G.H. (R. G.H.), Schwendener, M.H. (M. H.), Secrest, J.A. (J. A.), Seibert, S.R. (S. R.), Simard, O. (O.), Sinclair, D. (D.), Skensved, P. (P.), Sonley, T.J. (T. J.), Stonehill, L.C. (L. C.), Tešić, G. (G.), Tolich, N. (N.), Tsui, T. (T.), Van Berg, R. (R.), Vandevender, B.A. (B. A.), Virtue, C.J. (C. J.), Wall, B.L. (B. L.), Waller, D. (D.), Wan Chan Tseung, H. (H.), Wark, D.L. (D. L.), Wendland, J. (J.), West, N. (N.), Wilkerson, J.F. (J. F.), Winchester, T. (T.), Wilson, J.R. (J. R.), Wright, A. (A.), Yeh, M. (M.), Zhang, F. (F.), and Zuber, K. (K.)

Abstract

Experimental tests of Lorentz symmetry in systems of all types are critical for ensuring that the basic assumptions of physics are well founded. Data from all phases of the Sudbury Neutrino Observatory, a kiloton-scale heavy water Cherenkov detector, are analyzed for possible violations of Lorentz symmetry in the neutrino sector. Such violations would appear as one of eight possible signal types in the detector: six seasonal variations in the solar electron neutrino survival probability differing in energy and time dependence and two shape changes to the oscillated solar neutrino energy spectrum. No evidence for such signals is observed, and limits on the size of such effects are established in the framework of the standard model extension, including 38 limits on previously unconstrained operators and improved limits on 16 additional operators. This makes limits on all minimal, Dirac-type Lorentz violating operators in the neutrino sector available for the first time.

Published
2018
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25. Design, calibration, and performance of the MINERvA detector

Author

Aliaga, L. Bagby, L. Baldin, B. Baumbaugh, A. Bodek, A. and Bradford, R. Brooks, W. K. Boehnlein, D. Boyd, S. and Budd, H. Butkevich, A. Martinez Caicedo, D. A. Castromonte, C. M. Christy, M. E. Chvojka, J. da Motta, H. Damiani, D. S. Danko, I. Datta, M. DeMaat, R. Devan, J. and Draeger, E. Dytman, S. A. Diaz, G. A. Eberly, B. and Edmondson, D. A. Felix, J. Fields, L. Fiorentini, G. A. and Flight, R. S. Gago, A. M. Gallagher, H. George, C. A. and Gielata, J. A. Gingu, C. Gobbi, B. Gran, R. Grange, J. and Grossman, N. Harris, D. A. Heaton, J. Higuera, A. and Hobbs, J. A. Howley, I. J. Hurtado, K. Jerkins, M. and Kafka, T. Kantner, M. O. Keppel, C. Kilmer, J. Kordosky, M. Krajeski, A. H. Kumbartzki, G. J. Lee, H. Leister, A. G. Locke, G. Maggi, G. Maher, E. Manly, S. Mann, W. A. Marshall, C. M. McFarland, K. S. McGivern, C. L. and McGowan, A. M. Mislivec, A. Morfin, J. G. Mousseau, J. and Naples, D. Nelson, J. K. Niculescu, G. Niculescu, I. and O'Connor, C. D. Ochoa, N. Olsen, J. Osmanov, B. Osta, J. and Palomino, J. L. Paolone, V. Park, J. Perdue, G. N. and Pena, C. Pla-Dalmau, A. Rakotondravohitra, L. Ransome, R. D. and Ray, H. Ren, L. Rubinov, P. Rude, C. Sassin, K. E. and Schellman, H. Schmitz, D. W. Schneider, R. M. Schulte, E. C. Simon, C. Snider, F. D. Snyder, M. C. Solano Salinas, C. J. Tagg, N. Tice, B. G. Tilden, R. N. and Tzanakos, G. Velasquez, J. P. Walton, T. Westerberg, A. and Wolcott, J. Wolthuis, B. A. Woodward, N. Wytock, T. and Zavala, G. Zeng, H. B. Zhang, D. Zhu, L. Y. Ziemer, B. P.

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Experiment
Abstract

The MINERvA(6) experiment is designed to perform precision studies of neutrino-nucleus scattering using nu(mu) and (nu) over bar (mu) neutrinos incident at 1-20 GeV in the NuMI beam at Fermilab. This article presents a detailed description of the MINERvA detector and describes the ex situ and in situ techniques employed to characterize the detector and monitor its performance. The detector is composed of a finely segmented scintillator-based inner tracking region surrounded by electromagnetic and hadronic sampling calorimetry. The upstream portion of the detector includes planes of graphite, iron and lead interleaved between tracking planes to facilitate the study of nuclear effects in neutrino interactions. Observations concerning the detector response over sustained periods of running are reported. The detector design and methods of operation have relevance to future neutrino experiments in which segmented scintillator tracking is utilized. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).

Published
2014

26. Measurement of Muon Neutrino Quasielastic Scattering on a Hydrocarbon Target atEν∼3.5 GeV

Author

The MINERvA collaboration, Fiorentini, G. A., Schmitz, D. W., Rodrigues, P. A., Aliaga, L., Altinok, O., Baldin, B., Baumbaugh, A., Bodek, A., Boehnlein, D., Boyd, S., Bradford, R., Brooks, W. K., Budd, H., Butkevich, A., Caicedo, D. A. Martinez, Castromonte, C. M., Christy, M. E., Chung, H., Chvojka, J., Clark, M., da Motta, H., Damiani, D. S., Danko, I., Datta, M., Day, M., DeMaat, R., Devan, J., Draeger, E., Dytman, S. A., Díaz, G. A., Eberly, B., Edmondson, D. A., Felix, J., Fitzpatrick, T., Fields, L., Gago, A. M., Gallagher, H., George, C. A., Gielata, J. A., Gingu, C., Gobbi, B., Gran, R., Grossman, N., Hanson, J., Harris, D. A., Heaton, J., Higuera, A., Howley, I. J., Hurtado, K., Jerkins, M., Kafka, T., Kaisen, J., Kanter, M. O., Keppel, C. E., Kilmer, J., Kordosky, M., Krajeski, A. H., Kulagin, S. A., Le, T., Lee, H., Leister, A. G., Locke, G., Maggi, G., Maher, E., Manly, S., Mann, W. A., Marshall, C. M., McFarland, K. S., McGivern, C. L., McGowan, A. M., Mislivec, A., Morfń, J. G., Mousseau, J., Naples, D., Nelson, J. K., Niculescu, G., Niculescu, I., Ochoa, N., O'Connor, C. D., Olsen, J., Osmanov, B., Osta, J., Palomino, J. L., Paolone, V., Park, J., Patrick, C. E., Perdue, G. N., Peña, C., Rakotondravohitra, L., Ransome, R. D., Ray, H., Ren, L., Rude, C., Sassin, K. E., Schellman, H., Schneider, R. M., Schulte, E. C., Simon, C., Snider, F. D., Snyder, M. C., Sobczyk, J. T., Salinas, C. J. Solano, Tagg, N., Tan, W., Tice, B. G., Tzanakos, G., Velásquez, J. P., Walding, J., Walton, T., Wolcott, J., Wolthuis, B. A., Woodward, N., Zavala, G., Zeng, H. B., Zhang, D., Zhu, L. Y., and Ziemer, B. P.

Subjects
Physics, Elastic scattering, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, NuMI, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, Content (measure theory), High Energy Physics::Experiment, Muon neutrino, Fermilab, 010306 general physics, Fermi gas, Nucleon, Nuclear Experiment, Energy (signal processing)
Abstract

We report a study of muon neutrino charged-current quasi-elastic events in the segmented scintillator inner tracker of the MINERvA experiment running in the NuMI neutrino beam at Fermilab. The events were selected by requiring a {\mu}^- and low calorimetric recoil energy separated from the interaction vertex. We measure the flux-averaged differential cross-section, d{\sigma}/dQ^2, and study the low energy particle content of the final state. Deviations are found between the measured d{\sigma}/dQ^2 and the expectations of a model of independent nucleons in a relativistic Fermi gas. We also observe an excess of energy near the vertex consistent with multiple protons in the final state., Comment: 7 pages, 5 figures. Added correlation between neutrino and anti-neutrino result in ancillary files (CSV)

Published
2013

27. Measurement of Muon antineutrino quasielastic scattering on a hydrocarbon target at Eν∼3.5 GeV

Author

Fields, L. Chvojka, J. Aliaga, L. Altinok, O. Baldin, B. Baumbaugh, A. Bodek, A. Boehnlein, D. Boyd, S. Bradford, R. Brooks, W.K. Budd, H. Butkevich, A. Martinez Caicedo, D.A. Castromonte, C.M. Christy, M.E. Chung, H. Clark, M. Da Motta, H. Damiani, D.S. Danko, I. Datta, M. Day, M. Demaat, R. Devan, J. Draeger, E. Dytman, S.A. Díaz, G.A. Eberly, B. Edmondson, D.A. Felix, J. Fitzpatrick, T. Fiorentini, G.A. Gago, A.M. Gallagher, H. George, C.A. Gielata, J.A. Gingu, C. Gobbi, B. Gran, R. Grossman, N. Hanson, J. Harris, D.A. Heaton, J. Higuera, A. Howley, I.J. Hurtado, K. Jerkins, M. Kafka, T. Kaisen, J. Kanter, M.O. Keppel, C.E. Kilmer, J. Kordosky, M. Krajeski, A.H. Kulagin, S.A. Le, T. Lee, H. Leister, A.G. Locke, G. Maggi, G. Maher, E. Manly, S. Mann, W.A. Marshall, C.M. McFarland, K.S. McGivern, C.L. McGowan, A.M. Mislivec, A. Morfín, J.G. Mousseau, J. Naples, D. Nelson, J.K. Niculescu, G. Niculescu, I. Ochoa, N. O'Connor, C.D. Olsen, J. Osmanov, B. Osta, J. Palomino, J.L. Paolone, V. Park, J. Patrick, C.E. Perdue, G.N. Peña, C. Rakotondravohitra, L. Ransome, R.D. Ray, H. Ren, L. Rodrigues, P.A. Rude, C. Sassin, K.E. Schellman, H. Schmitz, D.W. Schneider, R.M. Schulte, E.C. Simon, C. Snider, F.D. Snyder, M.C. Sobczyk, J.T. Solano Salinas, C.J. Tagg, N. Tan, W. Tice, B.G. Tzanakos, G. Velásquez, J.P. Walding, J. Walton, T. Wolcott, J. Wolthuis, B.A. Woodward, N. Zavala, G. Zeng, H.B. Zhang, D. Zhu, L.Y. Ziemer, B.P.

Subjects
Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

We have isolated ν̄μ charged-current quasielastic (QE) interactions occurring in the segmented scintillator tracking region of the MINERvA detector running in the NuMI neutrino beam at Fermilab. We measure the flux-averaged differential cross section, dσ/dQ2, and compare to several theoretical models of QE scattering. Good agreement is obtained with a model where the nucleon axial mass, MA, is set to 0.99 GeV/c2 but the nucleon vector form factors are modified to account for the observed enhancement, relative to the free nucleon case, of the cross section for the exchange of transversely polarized photons in electron-nucleus scattering. Our data at higher Q2 favor this interpretation over an alternative in which the axial mass is increased. © 2013 American Physical Society.

Published
2013

28. Measurement of muon neutrino quasielastic scattering on a hydrocarbon target at Eν∼3.5 GeV

Author

Fiorentini, G.A. Schmitz, D.W. Rodrigues, P.A. Aliaga, L. Altinok, O. Baldin, B. Baumbaugh, A. Bodek, A. Boehnlein, D. Boyd, S. Bradford, R. Brooks, W.K. Budd, H. Butkevich, A. Martinez Caicedo, D.A. Castromonte, C.M. Christy, M.E. Chung, H. Chvojka, J. Clark, M. Da Motta, H. Damiani, D.S. Danko, I. Datta, M. Day, M. Demaat, R. Devan, J. Draeger, E. Dytman, S.A. Díaz, G.A. Eberly, B. Edmondson, D.A. Felix, J. Fields, L. Fitzpatrick, T. Gago, A.M. Gallagher, H. George, C.A. Gielata, J.A. Gingu, C. Gobbi, B. Gran, R. Grossman, N. Hanson, J. Harris, D.A. Heaton, J. Higuera, A. Howley, I.J. Hurtado, K. Jerkins, M. Kafka, T. Kaisen, J. Kanter, M.O. Keppel, C.E. Kilmer, J. Kordosky, M. Krajeski, A.H. Kulagin, S.A. Le, T. Lee, H. Leister, A.G. Locke, G. Maggi, G. Maher, E. Manly, S. Mann, W.A. Marshall, C.M. McFarland, K.S. McGivern, C.L. McGowan, A.M. Mislivec, A. Morfín, J.G. Mousseau, J. Naples, D. Nelson, J.K. Niculescu, G. Niculescu, I. Ochoa, N. O'Connor, C.D. Olsen, J. Osmanov, B. Osta, J. Palomino, J.L. Paolone, V. Park, J. Patrick, C.E. Perdue, G.N. Peña, C. Rakotondravohitra, L. Ransome, R.D. Ray, H. Ren, L. Rude, C. Sassin, K.E. Schellman, H. Schneider, R.M. Schulte, E.C. Simon, C. Snider, F.D. Snyder, M.C. Sobczyk, J.T. Solano Salinas, C.J. Tagg, N. Tan, W. Tice, B.G. Tzanakos, G. Velásquez, J.P. Walding, J. Walton, T. Wolcott, J. Wolthuis, B.A. Woodward, N. Zavala, G. Zeng, H.B. Zhang, D. Zhu, L.Y. Ziemer, B.P.

Subjects
Physics::Instrumentation and Detectors
Abstract

We report a study of νμ charged-current quasielastic events in the segmented scintillator inner tracker of the MINERvA experiment running in the NuMI neutrino beam at Fermilab. The events were selected by requiring a μ- and low calorimetric recoil energy separated from the interaction vertex. We measure the flux-averaged differential cross section, dσ/dQ2, and study the low energy particle content of the final state. Deviations are found between the measured dσ/dQ2 and the expectations of a model of independent nucleons in a relativistic Fermi gas. We also observe an excess of energy near the vertex consistent with multiple protons in the final state. © 2013 American Physical Society.

Published
2013

31. Constraints on neutrino lifetime from the Sudbury Neutrino Observatory

Author

Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Bonventre, R., Boudjemline, K., Boulay, M. G., Cai, B., Callaghan, E. J., Caravaca, J., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Descamps, F. B., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P.-L., Dunford, M., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Gilje, K., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Kéfélian, C., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Krüger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Land, B. J., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., Mastbaum, A., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O’Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., Orebi Gann, G. D., Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tešić, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Wan Chan Tseung, H., Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Winchester, T., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, High Energy Physics::Experiment, 7. Clean energy
Abstract

The long baseline between Earth and the Sun makes solar neutrinos an excellent test beam for exploring possible neutrino decay. The signature of such decay would be an energy-dependent distortion of the traditional survival probability which can be fit for using well-developed and high-precision analysis methods. Here a model including neutrino decay is fit to all three phases of 8B solar neutrino data taken by the Sudbury Neutrino Observatory (SNO). This fit constrains the lifetime of neutrino mass state ν2 to be > 8.08 × 10−5 s=eV at 90% confidence. An analysis combining this SNO result with those from other solar neutrino experiments results in a combined limit for the lifetime of mass state ν2 of > 1.92 × 10−3 s=eV at 90% confidence.

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