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8 results on '"Martincik J"'

1. The \pi^+\pi^- Coulomb interaction study and its use in the data processing

Author

Adeva, B., Afanasyev, L., Anania, A., Aogaki, S., Benelli, A., Brekhovskikh, V., Cechak, T., Chiba, M., Chliapnikov, P., Drijard, D., Dudarev, A., Dumitriu, D., Federicova, P., Gorin, A., Gritsay, K., Guaraldo, C., Gugiu, M., Hansroul, M., Hons, Z., Horikawa, S., Iwashita, Y., Kluson, J., Kobayashi, M., Kruglova, L., Kulikov, A., Kulish, E., Lamberto, A., Lanaro, A., Lednicky, R., Marinas, C., Martincik, J., Nemenov, L., Nikitin, M., Okada, K., Olchevskii, V., Pentia, M., Penzo, A., Plo, M., Prusa, P., Rappazzo, G., Vidal, A. Romero, Ryazantsev, A., Rykalin, V., Saborido, J., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Trojek, T., Trusov, S., Urban, T., Vrba, T., Yazkov, V., Yoshimura, Y., and Zrelov, P.

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

In this work the Coulomb effects (Coulomb correlations) in $\pi^+\pi^-$ pairs produced in p + Ni collisions at 24 GeV/$c$, are studied using experimental $\pi^+\pi^-$ pair distributions in $Q$, the relative momentum in the pair center of mass system (c.m.s), and its projections $Q_L$ (longitudinal component) and $Q_t$ (transverse component) relative to the pair direction in the laboratory system (l.s.). The $Q$, $Q_L$, and $Q_t$ distributions of the {\sl Coulomb pairs} in the c.m.s. have been simulated assuming they are described by the phase space modified by the known point-like Coulomb correlation function $A_C(Q)$, corrected for small effects due to the nonpoint-like pair production and the strong two-pion interaction. The same distributions of {\sl non-Coulomb pairs} have been simulated according to the phase space, but without $A_C(Q)$. It is shown that the number of {\sl Coulomb pairs} in all $Q_t$ intervals, including the small $Q_t$ (small opening angles $\theta$ in the l.s.) is calculated with the theoretical precision better than 2\%. The comparison of the simulated and experimental numbers of {\sl Coulomb pairs} at small $Q_t$ allows us to check and correct the detection efficiency for the pairs with small $\theta$ (0.06 mrad and smaller). It is shown that {\sl Coulomb pairs} can be used as a new physical tool to check and correct the quality of the simulated events. The special property of the {\sl Coulomb pairs} is the possibility of checking and correcting the detection efficiency, especially for the pairs with small opening angles.

Published
2024

2. Investigation of $K^+K^-$ pairs in the effective mass region near $2m_K$

Author

Adeva, B., Afanasyev, L., Anania, A., Aogaki, S., Benelli, A., Brekhovskikh, V., Cechak, T., Chiba, M., Chliapnikov, P., Drijard, D., Dudarev, A., Dumitriu, D., Federicova, P., Gorin, A., Gritsay, K., Guaraldo, C., Gugiu, M., Hansroul, M., Hons, Z., Horikawa, S., Iwashita, Y., Karpukhin, V., Kluson, J., Kobayashi, M., Kruglova, L., Kulikov, A., Kulish, E., Lamberto, A., Lanaro, A., Lednicky, R., Mariñas, C., Martincik, J., Nemenov, L., Nikitin, M., Okada, K., Olchevskii, V., Pentia, M., Penzo, A., Plo, M., Prusa, P., Rappazzo, G., Vidal, A. Romero, Ryazantsev, A., Rykalin, V., Saborido, J., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Trojek, T., Trusov, S., Urban, T., Vrba, T., Yazkov, V., Yoshimura, Y., and Zrelov, P.

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

The DIRAC experiment at CERN investigated in the reaction $\rm{p}(24~\rm{GeV}/c) + Ni$ the particle pairs $K^+K^-, \pi^+ \pi^-$ and $p \bar{p}$ with relative momentum $Q$ in the pair system less than 100 MeV/c. Because of background influence studies, DIRAC explored three subsamples of $K^+K^-$ pairs, obtained by subtracting -- using time-of-flight (TOF) technique -- background from initial $Q$ distributions with $K^+K^-$ sample fractions more than 70\%, 50\% and 30\%. The corresponding pair distributions in $Q$ and in its longitudinal projection $Q_L$ were analyzed first in a Coulomb model, which takes into account only Coulomb final state interaction (FSI) and assuming point-like pair production. This Coulomb model analysis leads to a $K^+K^-$ yield increase of about four at $Q_L=0.5$ MeV/c compared to 100 MeV/c. In order to study contributions from strong interaction, a second more sophisticated model was applied, considering besides Coulomb FSI also strong FSI via the resonances $f_0(980)$ and $a_0(980)$ and a variable distance $r^*$ between the produced $K$ mesons. This analysis was based on three different parameter sets for the pair production. For the 70\% subsample and with best parameters, $3680\pm 370$ $K^+K^-$ pairs was found to be compared to $3900\pm 410$ $K^+K^-$ extracted by means of the Coulomb model. Knowing the efficiency of the TOF cut for background suppression, the total number of detected $K^+K^-$ pairs was evaluated to be around $40000\pm 10\%$, which agrees with the result from the 30\% subsample. The $K^+K^-$ pair number in the 50\% subsample differs from the two other values by about three standard deviations, confirming -- as discussed in the paper -- that experimental data in this subsample is less reliable.

Published
2022
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3. First measurement of a long-lived $\pi^+ \pi^-$ atom lifetime

Author

Adeva, B., Afanasyev, L., Anania, A., Aogaki, S., Benelli, A., Brekhovskikh, V., Cechak, T., Chiba, M., Chliapnikov, P. V., Doskarova, P., Drijard, D., Dudarev, A., Dumitriu, D., Fluerasu, D., Gorin, A., Gorchakov, O., Gritsay, K., Guaraldo, C., Gugiu, M., Hansroul, M., Hons, Z., Horikawa, S., Iwashita, Y., Karpukhin, V., Kluson, J., Kobayashi, M., Kruglov, V., Kruglova, L., Kulikov, A., Kulish, E., Lamberto, A., Lanaro, A., Lednicky, R., Mariñas, C., Martincik, J., Nemenov, L., Nikitin, M., Okada, K., Olchevskii, V., Ovsiannikov, V., Pentia, M., Penzo, A., Plo, M., Prusa, P., Rappazzo, G. F., Vidal, A. Romero, Ryazantsev, A., Rykalin, V., Saborido, J., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Trojek, T., Trusov, S., Vrba, T., Yazkov, V., Yoshimura, Y., and Zrelov, P.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The adapted DIRAC experiment at the CERN PS accelerator observed for the first time long-lived hydrogen-like $\pi^+\pi^-$ atoms, produced by protons hitting a beryllium target. A part of these atoms crossed the gap of 96~mm and got broken up in the 2.1~\textmu{}m thick platinum foil. Analysing the observed number of atomic pairs, $n_A^L= \left.436^{+157}_{-61}\right|_\mathrm{tot}$, the lifetime of the 2$p$ state is found to be ${\tau_{2p}=(\left.0.45^{+1.08}_{-0.30}\right|_\mathrm{tot}) \cdot10^{-11}}$s, not contradicting the corresponding QED $2p$ state lifetime ${\tau_{2p}^\mathrm{QED}=1.17 \cdot 10^{-11}}$s. This lifetime value is three orders of magnitude larger than our previously measured value of the $\pi^+\pi^-$ atom ground state lifetime $\tau=(\left.3.15^{+0.28}_{-0.26}\right|_\mathrm{tot})\cdot 10^{-15}$s. Further studies of long-lived $\pi^+\pi^-$ atoms will allow to measure energy differences between $p$ and $s$ atomic states and so to determine $\pi\pi$ scattering lengths with the aim to check QCD predictions., Comment: 7 pages, 8 figures

Published
2018
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4. Measurement of the $\pi K$ atom lifetime and the $\pi K$ scattering length

Author

DIRAC Collaboration, Adeva, B., Afanasyev, L., Allkofer, Y., Amsler, C., Anania, A., Aogaki, S., Benelli, A., Brekhovskikh, V., Cechak, T., Chiba, M., Chliapnikov, P., Drijard, D., Dudarev, A., Dumitriu, D., Federicova, P., Fluerasu, D., Gorin, A., Gorchakov, O., Gritsay, K., Guaraldo, C., Gugiu, M., Hansroul, M., Hons, Z., Horikawa, S., Iwashita, Y., Karpukhin, V., Kluson, J., Kobayashi, M., Kruglov, V., Kruglova, L., Kulikov, A., Kulish, E., Kuptsov, A., Lamberto, A., Lanaro, A., Lednicky, R., Marinas, C., Martincik, J., Nemenov, L., Nikitin, M., Okada, K., Olchevskii, V., Pentia, M., Penzo, A., Plo, M., Prusa, P., Rappazzo, G., Vidal, A. Romero, Ryazantsev, A., Rykalin, V., Saborido, J., Schacher, J., Sidorov, A., Smolik, J., Takeutchi, F., Tauscher, L., Trojek, T., Trusov, S., Urban, T., Vrba, T., Yazkov, V., Yoshimura, Y., Zhabitsky, M., and Zrelov, P.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

After having announced the statistically significant observation (5.6~$\sigma$) of the new exotic $\pi K$ atom, the DIRAC experiment at the CERN proton synchrotron presents the measurement of the corresponding atom lifetime, based on the full $\pi K$ data sample: $\tau = (5.5^{+5.0}_{-2.8}) \cdot 10^{-15}s$. By means of a precise relation ($<1\%$) between atom lifetime and scattering length, the following value for the S-wave isospin-odd $\pi K$ scattering length $a_0^{-}~=~\frac{1}{3}(a_{1/2}-a_{3/2})$ has been derived: $\left|a_0^-\right| = (0.072^{+0.031}_{-0.020}) M_{\pi}^{-1}$., Comment: 18 pages, 17 figures

Published
2017
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5. First measurement of muon-neutrino disappearance in NOvA

Author

Adamson, P., Ader, C., Andrews, M., Anfimov, N., Anghel, I., Arms, K., Arrieta-Diaz, E., Aurisano, A., Ayres, D., Backhouse, C., Baird, M., Bambah, B. A., Bays, K., Bernstein, R., Betancourt, M., Bhatnagar, V., Bhuyan, B., Bian, J., Biery, K., Blackburn, T., Bocean, V., Bogert, D., Bolshakova, A., Bowden, M., Bower, C., Broemmelsiek, D., Bromberg, C., Brunetti, G., Bu, X., Butkevich, A., Capista, D., Catano-Mur, E., Chase, T. R., Childress, S., Choudhary, B. C., Chowdhury, B., Coan, T. E., Coelho, J. A. B., Colo, M., Cooper, J., Corwin, L., Cronin-Hennessy, D., Cunningham, A., Davies, G. S., Davies, J. P., Del Tutto, M., Derwent, P. F., Deepthi, K. N., Demuth, D., Desai, S., Deuerling, G., Devan, A., Dey, J., Dharmapalan, R., Ding, P., Dixon, S., Djurcic, Z., Dukes, E. C., Duyang, H., Ehrlich, R., Feldman, G. J., Felt, N., Fenyves, E. J., Flumerfelt, E., Foulkes, S., Frank, M. J., Freeman, W., Gabrielyan, M., Gallagher, H. R., Gebhard, M., Ghosh, T., Gilbert, W., Giri, A., Goadhouse, S., Gomes, R. A., Goodenough, L., Goodman, M. C., Grichine, V., Grossman, N., Group, R., Grudzinski, J., Guarino, V., Guo, B., Habig, A., Handler, T., Hartnell, J., Hatcher, R., Hatzikoutelis, A., Heller, K., Howcroft, C., Huang, J., Huang, X., Hylen, J., Ishitsuka, M., Jediny, F., Jensen, C., Jensen, D., Johnson, C., Jostlein, H., Kafka, G. K., Kamyshkov, Y., Kasahara, S. M. S., Kasetti, S., Kephart, K., Koizumi, G., Kotelnikov, S., Kourbanis, I., Krahn, Z., Kravtsov, V., Kreymer, A., Kulenberg, Ch., Kumar, A., Kutnink, T., Kwarciancy, R., Kwong, J., Lang, K., Lee, A., Lee, W. M., Lee, K., Lein, S., Liu, J., Lokajicek, M., Lozier, J., Lu, Q., Lucas, P., Luchuk, S., Lukens, P., Lukhanin, G., Magill, S., Maan, K., Mann, W. A., Marshak, M. L., Martens, M., Martincik, J., Mason, P., Matera, K., Mathis, M., Matveev, V., Mayer, N., McCluskey, E., Mehdiyev, R., Merritt, H., Messier, M. D., Meyer, H., Miao, T., Michael, D., Mikheyev, S. P., Miller, W. H., Mishra, S. R., Mohanta, R., Moren, A., Mualem, L., Muether, M., Mufson, S., Musser, J., Newman, H. B., Nelson, J. K., Niner, E., Norman, A., Nowak, J., Oksuzian, Y., Olshevskiy, A., Oliver, J., Olson, T., Paley, J., Pandey, P., Para, A., Patterson, R. B., Pawloski, G., Pearson, N., Perevalov, D., Pershey, D., Peterson, E., Petti, R., Phan-Budd, S., Piccoli, L., Pla-Dalmau, A., Plunkett, R. K., Poling, R., Potukuchi, B., Psihas, F., Pushka, D., Qiu, X., Raddatz, N., Radovic, A., Rameika, R. A., Ray, R., Rebel, B., Rechenmacher, R., Reed, B., Reilly, R., Rocco, D., Rodkin, D., Ruddick, K., Rusack, R., Ryabov, V., Sachdev, K., Sahijpal, S., Sahoo, H., Samoylov, O., Sanchez, M. C., Saoulidou, N., Schlabach, P., Schneps, J., Schroeter, R., Sepulveda-Quiroz, J., Shanahan, P., Sherwood, B., Sheshukov, A., Singh, J., Singh, V., Smith, A., Smith, D., Smolik, J., Solomey, N., Sotnikov, A., Sousa, A., Soustruznik, K., Stenkin, Y., Strait, M., Suter, L., Talaga, R. L., Tamsett, M. C., Tariq, S., Tas, P., Tesarek, R. J., Thayyullathil, R. B., Thomsen, K., Tian, X., Tognini, S. C., Toner, R., Trevor, J., Tzanakos, G., Urheim, J., Vahle, P., Valerio, L., Vinton, L., Vrba, T., Waldron, A. V., Wang, B., Wang, Z., Weber, A., Wehmann, A., Whittington, D., Wilcer, N., Wildberger, R., Wildman, D., Williams, K., Wojcicki, S. G., Wood, K., Xiao, M., Xin, T., Yadav, N., Yang, S., Zadorozhnyy, S., Zalesak, J., Zamorano, B., Zhao, A., Zirnstein, J., and Zwaska, R.

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

This paper reports the first measurement using the NOvA detectors of $\nu_\mu$ disappearance in a $\nu_\mu$ beam. The analysis uses a 14 kton-equivalent exposure of $2.74 \times 10^{20}$ protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure $\Delta m^{2}_{32}=(2.52^{+0.20}_{-0.18})\times 10^{-3}$ eV$^{2}$ and $\sin^2\theta_{23}$ in the range 0.38-0.65, both at the 68% confidence level, with two statistically-degenerate best fit points at $\sin^2\theta_{23} = $ 0.43 and 0.60. Results for the inverted mass hierarchy are also presented., Comment: 8 pages, 6 figures. Submitted to Phys. Rev. D Rapid Communications

Published
2016
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6. First measurement of electron neutrino appearance in NOvA

Author

Adamson, P., Ader, C., Andrews, M., Anfimov, N., Anghel, I., Arms, K., Arrieta-Diaz, E., Aurisano, A., Ayres, D. S., Backhouse, C., Baird, M., Bambah, B. A., Bays, K., Bernstein, R., Betancourt, M., Bhatnagar, V., Bhuyan, B., Bian, J., Biery, K., Blackburn, T., Bocean, V., Bogert, D., Bolshakova, A., Bowden, M., Bower, C., Broemmelsiek, D., Bromberg, C., Brunetti, G., Bu, X., Butkevich, A., Capista, D., Catano-Mur, E., Chase, T. R., Childress, S., Choudhary, B. C., Chowdhury, B., Coan, T. E., Coelho, J. A. B., Colo, M., Cooper, J., Corwin, L., Cronin-Hennessy, D., Cunningham, A., Davies, G. S., Davies, J. P., Del Tutto, M., Derwent, P. F., Deepthi, K. N., Demuth, D., Desai, S., Deuerling, G., Devan, A., Dey, J., Dharmapalan, R., Ding, P., Dixon, S., Djurcic, Z., Dukes, E. C., Duyang, H., Ehrlich, R., Feldman, G. J., Felt, N., Fenyves, E. J., Flumerfelt, E., Foulkes, S., Frank, M. J., Freeman, W., Gabrielyan, M., Gallagher, H. R., Gebhard, M., Ghosh, T., Gilbert, W., Giri, A., Goadhouse, S., Gomes, R. A., Goodenough, L., Goodman, M. C., Grichine, V., Grossman, N., Group, R., Grudzinski, J., Guarino, V., Guo, B., Habig, A., Handler, T., Hartnell, J., Hatcher, R., Hatzikoutelis, A., Heller, K., Howcroft, C., Huang, J., Huang, X., Hylen, J., Ishitsuka, M., Jediny, F., Jensen, C., Jensen, D., Johnson, C., Jostlein, H., Kafka, G. K., Kamyshkov, Y., Kasahara, S. M. S., Kasetti, S., Kephart, K., Koizumi, G., Kotelnikov, S., Kourbanis, I., Krahn, Z., Kravtsov, V., Kreymer, A., Kulenberg, Ch., Kumar, A., Kutnink, T., Kwarciancy, R., Kwong, J., Lang, K., Lee, A., Lee, W. M., Lee, K., Lein, S., Liu, J., Lokajicek, M., Lozier, J., Lu, Q., Lucas, P., Luchuk, S., Lukens, P., Lukhanin, G., Magill, S., Maan, K., Mann, W. A., Marshak, M. L., Martens, M., Martincik, J., Mason, P., Matera, K., Mathis, M., Matveev, V., Mayer, N., McCluskey, E., Mehdiyev, R., Merritt, H., Messier, M. D., Meyer, H., Miao, T., Michael, D., Mikheyev, S. P., Miller, W. H., Mishra, S. R., Mohanta, R., Moren, A., Mualem, L., Muether, M., Mufson, S., Musser, J., Newman, H. B., Nelson, J. K., Niner, E., Norman, A., Nowak, J., Oksuzian, Y., Olshevskiy, A., Oliver, J., Olson, T., Paley, J., Pandey, P., Para, A., Patterson, R. B., Pawloski, G., Pearson, N., Perevalov, D., Pershey, D., Peterson, E., Petti, R., Phan-Budd, S., Piccoli, L., Pla-Dalmau, A., Plunkett, R. K., Poling, R., Potukuchi, B., Psihas, F., Pushka, D., Qiu, X., Raddatz, N., Radovic, A., Rameika, R. A., Ray, R., Rebel, B., Rechenmacher, R., Reed, B., Reilly, R., Rocco, D., Rodkin, D., Ruddick, K., Rusack, R., Ryabov, V., Sachdev, K., Sahijpal, S., Sahoo, H., Samoylov, O., Sanchez, M. C., Saoulidou, N., Schlabach, P., Schneps, J., Schroeter, R., Sepulveda-Quiroz, J., Shanahan, P., Sherwood, B., Sheshukov, A., Singh, J., Singh, V., Smith, A., Smith, D., Smolik, J., Solomey, N., Sotnikov, A., Sousa, A., Soustruznik, K., Stenkin, Y., Strait, M., Suter, L., Talaga, R. L., Tamsett, M. C., Tariq, S., Tas, P., Tesarek, R. J., Thayyullathil, R. B., Thomsen, K., Tian, X., Tognini, S. C., Toner, R., Trevor, J., Tzanakos, G., Urheim, J., Vahle, P., Valerio, L., Vinton, L., Vrba, T., Waldron, A. V., Wang, B., Wang, Z., Weber, A., Wehmann, A., Whittington, D., Wilcer, N., Wildberger, R., Wildman, D., Williams, K., Wojcicki, S. G., Wood, K., Xiao, M., Xin, T., Yadav, N., Yang, S., Zadorozhnyy, S., Zalesak, J., Zamorano, B., Zhao, A., Zirnstein, J., and Zwaska, R.

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

We report results from the first search for $\nu_\mu\to\nu_e$ transitions by the NOvA experiment. In an exposure equivalent to $2.74\times10^{20}$ protons-on-target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of $0.99\pm0.11$ (syst.) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of $1.07\pm0.14$ (syst.). The $3.3\sigma$ excess of events observed in the primary analysis disfavors $0.1\pi < \delta_{CP} < 0.5\pi$ in the inverted mass hierarchy at the 90% C.L., Comment: 7 pages, 4 figures. Minor updates to match version accepted by journal

Published
2016
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7. First $\pi K$ atom lifetime and $\pi K$ scattering length measurements

Author

Adeva, B., Afanasyev, L., Allkofer, Y., Amsler, C., Anania, A., Aogaki, S., Benelli, A., Brekhovskikh, V., Cechak, T., Chiba, M., Chliapnikov, P., Ciocarlan, C., Constantinescu, S., Doskarova, P., Drijard, D., Dudarev, A., Duma, M., Dumitriu, D., Fluerasu, D., Gorin, A., Gorchakov, O., Gritsay, K., Guaraldo, C., Gugiu, M., Hansroul, M., Hons, Z., Horikawa, S., Iwashita, Y., Karpukhin, V., Kluson, J., Kobayashi, M., Kruglov, V., Kruglova, L., Kulikov, A., Kulish, E., Kuptsov, A., Lamberto, A., Lanaro, A., Lednicky, R., Mariñas, C., Martincik, J., Nemenov, L., Nikitin, M., Okada, K., Olchevskii, V., Pentia, M., Penzo, A., Plo, M., Ponta, T., Prusa, P., Rappazzo, G., Vidal, A. Romero, Ryazantsev, A., Rykalin, V., Schacher, J., Sidorov, A., Smolik, J., Sugimoto, S., Takeutchi, F., Tauscher, L., Trojek, T., Trusov, S., Urban, T., Vrba, T., Yazkov, V., Yoshimura, Y., Zhabitsky, M., and Zrelov, P.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

The results of a search for hydrogen-like atoms consisting of $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence for $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with a nickel target has been seen in terms of characteristic $\pi K$ pairs from their breakup in the same target ($178 \pm 49$) and from Coulomb final state interaction ($653 \pm 42$). Using these results the analysis yields a first value for the $\pi K$ atom lifetime of $\tau=(2.5_{-1.8}^{+3.0})$ fs and a first model-independent measurement of the S-wave isospin-odd $\pi K$ scattering length $\left|a_0^-\right|=\frac{1}{3}\left|a_{1/2}-a_{3/2}\right|= \left(0.11_{-0.04}^{+0.09} \right)M_{\pi}^{-1}$ ($a_I$ for isospin $I$)., Comment: 14 pages, 8 figures

Published
2014
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8. First measurement of muon-neutrino disappearance in NOvA

Author

Adamson, P, Ader, C, Andrews, M, Anfimov, N, Anghel, I, Arms, K, Arrieta-Diaz, E, Aurisano, A, Ayres, DS, Backhouse, C, Baird, M, Bambah, BA, Bays, K, Bernstein, R, Betancourt, M, Bhatnagar, V, Bhuyan, B, Bian, J, Biery, K, Blackburn, T, Bocean, V, Bogert, D, Bolshakova, A, Bowden, M, Bower, C, Broemmelsiek, D, Bromberg, C, Brunetti, G, Bu, X, Butkevich, A, Capista, D, Catano-Mur, E, Chase, TR, Childress, S, Choudhary, BC, Chowdhury, B, Coan, TE, Coelho, JAB, Colo, M, Cooper, J, Corwin, L, Cronin-Hennessy, D, Cunningham, A, Davies, GS, Davies, JP, Del Tutto, M, Derwent, PF, Deepthi, KN, Demuth, D, Desai, S, Deuerling, G, Devan, A, Dey, J, Dharmapalan, R, Ding, P, Dixon, S, Djurcic, Z, Dukes, EC, Duyang, H, Ehrlich, R, Feldman, GJ, Felt, N, Fenyves, EJ, Flumerfelt, E, Foulkes, S, Frank, MJ, Freeman, W, Gabrielyan, M, Gallagher, HR, Gebhard, M, Ghosh, T, Gilbert, W, Giri, A, Goadhouse, S, Gomes, RA, Goodenough, L, Goodman, MC, Grichine, V, Grossman, N, Group, R, Grudzinski, J, Guarino, V, Guo, B, Habig, A, Handler, T, Hartnell, J, Hatcher, R, Hatzikoutelis, A, Heller, K, Howcroft, C, Huang, J, Huang, X, Hylen, J, Ishitsuka, M, Jediny, F, Jensen, C, Jensen, D, Johnson, C, Jostlein, H, Kafka, GK, Kamyshkov, Y, Kasahara, SMS, Kasetti, S, Kephart, K, Koizumi, G, Kotelnikov, S, Kourbanis, I, Krahn, Z, Kravtsov, V, Kreymer, A, Kulenberg, C, Kumar, A, Kutnink, T, Kwarciancy, R, Kwong, J, Lang, K, Lee, A, Lee, WM, Lee, K, Lein, S, Liu, J, Lokajicek, M, Lozier, J, Lu, Q, Lucas, P, Luchuk, S, Lukens, P, Lukhanin, G, Magill, S, Maan, K, Mann, WA, Marshak, ML, Martens, M, Martincik, J, Mason, P, Matera, K, Mathis, M, Matveev, V, Mayer, N, McCluskey, E, Mehdiyev, R, Merritt, H, Messier, MD, Meyer, H, Miao, T, Michael, D, Mikheyev, SP, Miller, WH, Mishra, SR, Mohanta, R, Moren, A, Mualem, L, Muether, M, Mufson, S, Musser, J, Newman, HB, Nelson, JK, Niner, E, Norman, A, Nowak, J, Oksuzian, Y, Olshevskiy, A, Oliver, J, Olson, T, Paley, J, Pandey, P, Para, A, Patterson, RB, Pawloski, 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Yang, S, Zadorozhnyy, S, Zalesak, J, Zamorano, B, Zhao, A, Zirnstein, J, Zwaska, R, Adamson, P, Ader, C, Andrews, M, Anfimov, N, Anghel, I, Arms, K, Arrieta-Diaz, E, Aurisano, A, Ayres, D, Backhouse, C, Baird, M, Bambah, B, Bays, K, Bernstein, R, Betancourt, M, Bhatnagar, V, Bhuyan, B, Bian, J, Biery, K, Blackburn, T, Bocean, V, Bogert, D, Bolshakova, A, Bowden, M, Bower, C, Broemmelsiek, D, Bromberg, C, Brunetti, G, Bu, X, Butkevich, A, Capista, D, Catano-Mur, E, Chase, T, Childress, S, Choudhary, B, Chowdhury, B, Coan, T, Coelho, J, Colo, M, Cooper, J, Corwin, L, Cronin-Hennessy, D, Cunningham, A, Davies, G, Davies, J, Del Tutto, M, Derwent, P, Deepthi, K, Demuth, D, Desai, S, Deuerling, G, Devan, A, Dey, J, Dharmapalan, R, Ding, P, Dixon, S, Djurcic, Z, Dukes, E, Duyang, H, Ehrlich, R, Feldman, G, Felt, N, Fenyves, E, Flumerfelt, E, Foulkes, S, Frank, M, Freeman, W, Gabrielyan, M, Gallagher, H, Gebhard, M, Ghosh, T, Gilbert, W, Giri, A, Goadhouse, S, Gomes, R, Goodenough, L, Goodman, M, Grichine, V, Grossman, N, Group, R, Grudzinski, J, Guarino, V, Guo, B, Habig, A, Handler, T, Hartnell, J, Hatcher, R, Hatzikoutelis, A, Heller, K, Howcroft, C, Huang, J, Huang, X, Hylen, J, Ishitsuka, M, Jediny, F, Jensen, C, Jensen, D, Johnson, C, Jostlein, H, Kafka, G, Kamyshkov, Y, Kasahara, S, Kasetti, S, Kephart, K, Koizumi, G, Kotelnikov, S, Kourbanis, I, Krahn, Z, Kravtsov, V, Kreymer, A, Kulenberg, C, Kumar, A, Kutnink, T, Kwarciancy, R, Kwong, J, Lang, K, Lee, A, Lee, W, Lee, K, Lein, S, Liu, J, Lokajicek, M, Lozier, J, Lu, Q, Lucas, P, Luchuk, S, Lukens, P, Lukhanin, G, Magill, S, Maan, K, Mann, W, Marshak, M, Martens, M, Martincik, J, Mason, P, Matera, K, Mathis, M, Matveev, V, Mayer, N, Mccluskey, E, Mehdiyev, R, Merritt, H, Messier, M, Meyer, H, Miao, T, Michael, D, Mikheyev, S, Miller, W, Mishra, S, Mohanta, R, Moren, A, Mualem, L, Muether, M, Mufson, S, Musser, J, Newman, H, Nelson, J, Niner, E, Norman, A, Nowak, J, Oksuzian, Y, Olshevskiy, A, Oliver, J, Olson, T, Paley, J, Pandey, P, Para, A, Patterson, R, Pawloski, G, Pearson, N, Perevalov, D, Pershey, D, Peterson, E, Petti, R, Phan-Budd, S, Piccoli, L, Pla-Dalmau, A, Plunkett, R, Poling, R, Potukuchi, B, Psihas, F, Pushka, D, Qiu, X, Raddatz, N, Radovic, A, Rameika, R, Ray, R, Rebel, B, Rechenmacher, R, Reed, B, Reilly, R, Rocco, D, Rodkin, D, Ruddick, K, Rusack, R, Ryabov, V, Sachdev, K, Sahijpal, S, Sahoo, H, Samoylov, O, Sanchez, M, Saoulidou, N, Schlabach, P, Schneps, J, Schroeter, R, Sepulveda-Quiroz, J, Shanahan, P, Sherwood, B, Sheshukov, A, Singh, J, Singh, V, Smith, A, Smith, D, Smolik, J, Solomey, N, Sotnikov, A, Sousa, A, Soustruznik, K, Stenkin, Y, Strait, M, Suter, L, Talaga, R, Tamsett, M, Tariq, S, Tas, P, Tesarek, R, Thayyullathil, R, Thomsen, K, Tian, X, Tognini, S, Toner, R, Trevor, J, Tzanakos, G, Urheim, J, Vahle, P, Valerio, L, Vinton, L, Vrba, T, Waldron, A, Wang, B, Wang, Z, Weber, A, Wehmann, A, Whittington, D, Wilcer, N, Wildberger, R, Wildman, D, Williams, K, Wojcicki, S, Wood, K, Xiao, M, Xin, T, Yadav, N, Yang, S, Zadorozhnyy, S, Zalesak, J, Zamorano, B, Zhao, A, Zirnstein, J, and Zwaska, R

Subjects
Physics, Particle physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, FOS: Physical sciences, QC0793, Nova (laser), Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Measure (mathematics), NuMI, NOvA, neutrino oscillation, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Muon neutrino, Fermilab, Neutrino, 010306 general physics, Neutrino oscillation, Beam (structure)
Abstract

This paper reports the first measurement using the NOvA detectors of $\nu_\mu$ disappearance in a $\nu_\mu$ beam. The analysis uses a 14 kton-equivalent exposure of $2.74 \times 10^{20}$ protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure $\Delta m^{2}_{32}=(2.52^{+0.20}_{-0.18})\times 10^{-3}$ eV$^{2}$ and $\sin^2\theta_{23}$ in the range 0.38-0.65, both at the 68% confidence level, with two statistically-degenerate best fit points at $\sin^2\theta_{23} = $ 0.43 and 0.60. Results for the inverted mass hierarchy are also presented., Comment: 8 pages, 6 figures. Submitted to Phys. Rev. D Rapid Communications

Published
2016
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