First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA

Autor: R. Murphy, C. Bromberg, Borun D. Chowdhury, R. B. Patterson, Anjan K. Giri, H. Duyang, S. Zadorozhnyy, D. Naples, M. Campbell, Stanley G. Wojcicki, W. Flanagan, A. Cedeno, N. Yadav, A. Holin, V Grichine, R. H. Bernstein, S. Edayath, S. Yu, M. Martinez-Casales, E. C. Dukes, Katsuya Yonehara, T. E. Coan, Cari L. Johnson, P. Ding, I. Kakorin, P. Shanahan, D. Doyle, I. Kourbanis, R. Ehrlich, E. Catano-Mur, J. Tripathi, A. Sheshukov, S. Altakarli, T. Miao, T. Olson, A. Aurisano, B. Tapia Oregui, N. Nayak, F. Gao, V. A. Matveev, Bo Wang, A. Radovic, S. R. Mishra, Bindu A. Bambah, R. Hatcher, F. Psihas, R. A. Rameika, Ihn Sik Seong, B. Bhuyan, Brajesh C Choudhary, D. D. Phan, E. Smith, J. K. Nelson, G. Nikseresht, D. P. Méndez, Pavel Snopok, J. Lozier, B. Zamorano, K. Mulder, Petr Tas, L. Cremonesi, V. A. Ryabov, W. A. Mann, J. Cooper, K. Bays, V. Allakhverdian, Rukmani Mohanta, Andrew Norman, Matthew L Strait, W. H. Miller, P. Singh, J. M. Paley, E. Song, Simon J. Bending, H. Meyer, M. C. Sanchez, O. Petrova, N. Balashov, A. Yallappa Dombara, Vipin Bhatnagar, V. Raj, T. K. Warburton, T. Nosek, J. Hartnell, J. Urheim, P. Vahle, L. Vinton, H. R. Gallagher, A. Hatzikoutelis, Vlastimil Kus, Ch Kulenberg, M. Judah, A. Back, Junwei Huang, A. Kumar, R. Zwaska, T. Lackey, M. D. Messier, A. E. Kreymer, B. V.K.S. Potukuchi, Simon Lin, J. Zalesak, D. Pershey, M. Baird, Petr Vokac, Jeremy Wolcott, Jianming Bian, J. Hewes, C. Backhouse, Alexander Olshevskiy, D. Torbunov, Marvin L Marshak, Stanislav Luchuk, A. Booth, Gregory J Pawloski, J. A. Musser, N. Buchanan, S. Sánchez Falero, M. Wetstein, Juergen Thomas, B. Guo, P. Adamson, S. Bashar, Ken Heller, D. Kalra, C. Principato, Nikolay Anfimov, M. R. While, O. Klimov, M. Groh, A. Moren, C. Kuruppu, B. Rebel, K. Soustruznik, Karol Lang, F. Hakl, A. Mislivec, L. W. Koerner, L. Suter, M. Elkins, T. J. Carroll, Pierre Baldi, E. Tiras, R. Gandrajula, T. Vrba, Yagmur Torun, R. B. Thayyullathil, Andrew J. Sutton, F. Jediny, Anatoly Butkevich, J. Blair, P. Filip, M. Muether, M. Wallbank, S Kotelnikov, R. A. Gomes, A. Antoshkin, S. Magill, G. J. Feldman, R. Petti, D. Whittington, M. J. Frank, J. Vasel, R. K. Plunkett, K. Maan, Maury Goodman, V. Singh, L. Kolupaeva, P. F. Derwent, L. Corwin, A. Tsaris, T. Blackburn, S. L. Mufson, B. Howard, S. Calvez, P. Rojas, T. Alion, A. Sousa, Z. Djurcic, R. L. Talaga, Daniel M. Kaplan, J. Hylen, S. Germani, M. Colo, L. Aliaga, Alec Habig, Gavin Davies, R. J. Nichol, M. A. Acero, A. Himmel, P. Bour, L. Mualem, Milos Lokajicek, E. Niner, O. Samoylov, J. Smolik, S. Childress, N. Solomey, R. Keloth
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Physical Review Letters
ISSN: 0031-9007
Popis: The NOvA experiment has made a $4.4\sigma$-significant observation of $\bar\nu_{e}$ appearance in a 2 GeV $\bar\nu_{\mu}$ beam at a distance of 810 km. Using $12.33\times10^{20}$ protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 $\bar\nu_{\mu} \rightarrow \bar\nu_{e}$ candidates with a background of 10.3 and 102 $\bar\nu_{\mu} \rightarrow \bar\nu_{\mu}$ candidates. This new antineutrino data is combined with neutrino data to measure the oscillation parameters $|\Delta m^2_{32}| = 2.48^{+0.11}_{-0.06}\times10^{-3}$ eV$^2/c^4$, $\sin^2 \theta_{23} = 0.56^{+0.04}_{-0.03}$ in the normal neutrino mass hierarchy and upper octant and excludes most values near $\delta_{\rm CP}=\pi/2$ for the inverted mass hierarchy by more than 3$\sigma$. The data favor the normal neutrino mass hierarchy by 1.9$\sigma$ and $\theta_{23}$ values in the upper octant by 1.6$\sigma$.
Comment: 8 pages, 3 figures. Supplementary material attached (6 figures). To view attachments, please download and extract the gzipped tar source file listed under "Other formats". Fixed supplementary material to include just the compiled pdf not the Latex Source
Databáze: OpenAIRE