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

Journal Article · Fri Oct 11 00:00:00 EDT 2019 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.123.151803· OSTI ID:1570074

Acero, M. A.; Adamson, P.; Aliaga, L.; Alion, T.; Allakhverdian, V.; Altakarli, S.; Anfimov, N.; Antoshkin, A.; Aurisano, A.; Back, A.; Backhouse, C.; Baird, M.; Balashov, N.; Baldi, P.; Bambah, B. A.; Bashar, S.; Bays, K.; Bending, S.; Bernstein, R.; Bhatnagar, V. ; Bhuyan, B.; Bian, J.; Blackburn, T.; Blair, J.; Booth, A. C.; Bour, P.; Bromberg, C.; Buchanan, N.; Butkevich, A.; Calvez, S.; Campbell, M.; Carroll, T. J.; Catano-Mur, E.; Cedeno, A.; Childress, S.; Choudhary, B. C.; Chowdhury, B.; Coan, T. E.; Colo, M.; Cooper, J.; Corwin, L.; Cremonesi, L.; Davies, G. S.; Derwent, P. F.; Ding, P.; Djurcic, Z.; Doyle, D.; Dukes, E. C.; Duyang, H.; Edayath, S.; Ehrlich, R.; Elkins, M.; Feldman, G. J.; Filip, P.; Flanagan, W.; Frank, M. J.; Gallagher, H. R.; Gandrajula, R.; Gao, F.; Germani, S.; Giri, A.; Gomes, R. A.; Goodman, M. C.; Grichine, V.; Groh, M.; Group, R.; Guo, B.; Habig, A.; Hakl, F.; Hartnell, J.; Hatcher, R.; Hatzikoutelis, A.; Heller, K.; Hewes, J.; Himmel, A.; Holin, A.; Howard, B.; Huang, J.; Hylen, J.; Jediny, F.; Johnson, C.; Judah, M.; Kakorin, I.; Kalra, D.; Kaplan, D. M.; Keloth, R.; Klimov, O.; Koerner, L. W.; Kolupaeva, L.; Kotelnikov, S.; Kourbanis, I.; Kreymer, A.; Kulenberg, Ch.; Kumar, A.; Kuruppu, C. D.; Kus, V.; Lackey, T.; Lang, K.; Lin, S.; Lokajicek, M.; Lozier, J.; Luchuk, S.; Maan, K.; Magill, S.; Mann, W. A.; Marshak, M. L.; Martinez-Casales, M.; Matveev, V.; Méndez, D. P.; Messier, M. D. ; Meyer, H.; Miao, T.; Miller, W. H.; Mishra, S. R.; Mislivec, A.; Mohanta, R.; Moren, A.; Mualem, L.; Muether, M.; Mufson, S.; Mulder, K.; Murphy, R.; Musser, J.; Naples, D.; Nayak, N.; Nelson, J. K.; Nichol, R.; Nikseresht, G.; Niner, E.; Norman, A.; Nosek, T.; Olshevskiy, A.; Olson, T.; Paley, J.; Patterson, R. B.; Pawloski, G.; Pershey, D.; Petrova, O.; Petti, R.; Phan, D. D.; Plunkett, R. K.; Potukuchi, B.; Principato, C.; Psihas, F.; Radovic, A.; Raj, V.; Rameika, R. A.; Rebel, B.; Rojas, P.; Ryabov, V.; Samoylov, O.; Sanchez, M. C.; Sánchez Falero, S.; Seong, I. S.; Shanahan, P.; Sheshukov, A.; Singh, P.; Singh, V.; Smith, E.; Smolik, J.; Snopok, P.; Solomey, N.; Song, E.; Sousa, A.; Soustruznik, K.; Strait, M.; Suter, L.; Sutton, A.; Talaga, R. L.; Tapia Oregui, B.; Tas, P.; Thayyullathil, R. B.; Thomas, J.; Tiras, E.; Torbunov, D.; Tripathi, J.; Tsaris, A.; Torun, Y.; Urheim, J.; Vahle, P.; Vasel, J.; Vinton, L.; Vokac, P.; Vrba, T.; Wallbank, M.; Wang, B.; Warburton, T. K.; Wetstein, M.; While, M.; Whittington, D.; Wojcicki, S. G.; Wolcott, J.; Yadav, N.; Yallappa Dombara, A.; Yonehara, K.; Yu, S.; Zadorozhnyy, S.; Zalesak, J.; Zamorano, B.; Zwaska, R.

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$$\sigma$$.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Indiana Univ., Bloomington, IN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); India Department of Science and Technology; European Research Council (ERC)
• Contributing Organization: NOvA Collaboration
• Grant/Contract Number: AC02-07CH11359; AC02-05CH11231; SC0010120; AC02-06CH11357
• OSTI ID: 1570074
• Alternate ID(s): OSTI ID: 1546014; OSTI ID: 1595927; OSTI ID: 1607455
• Report Number(s): arXiv:1906.04907; FERMILAB-PUB-19-272-ND; PRLTAO; 151803
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Vol. 123 Journal Issue: 15; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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