New constraints on oscillation parameters from ${\nu }_e$ appearance and ${\nu }_{\mu }$ disappearance in the NOvA experiment

Journal Article · Fri Aug 24 00:00:00 EDT 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.98.032012· OSTI ID:1466438

Acero, M. A.; Adamson, P.; Aliaga, L.; Alion, T.; Allakhverdian, V.; Anfimov, N.; Antoshkin, A.; Arrieta-Diaz, E.; Aurisano, A.; Back, A.; Backhouse, C.; Baird, M.; Balashov, N.; Bambah, B. A.; Bays, K.; Behera, B.; Bending, S.; Bernstein, R.; Bhatnagar, V.; Bhuyan, B. ; Bian, J.; Blackburn, T.; Blair, J.; Bolshakova, A.; Bour, P.; Bromberg, C.; Brown, J.; Buchanan, N.; Butkevich, A.; Bychkov, V.; 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.; Cronin-Hennessy, D.; Davies, G. S.; Davies, J. P.; De Rijck, S.; Derwent, P. F.; Dharmapalan, R.; Ding, P.; Djurcic, Z.; Dukes, E. C.; Dung, P.; Duyang, H.; Edayath, S.; Ehrlich, R.; Feldman, G. J.; 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.; Grover, D.; Guo, B.; Habig, A.; Hakl, F.; Hartnell, J.; Hatcher, R.; Hatzikoutelis, A.; Heller, K.; Himmel, A.; Holin, A.; Howard, B.; Huang, J.; Hylen, J.; Jediny, F.; 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.; Kus, V.; Lackey, T.; Lang, K.; Lin, S.; Lokajicek, M.; Lozier, J.; Luchuk, S.; Maan, K.; Magill, S.; Mann, W. A.; Marshak, M. L.; 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.; Murphy, R.; Musser, J.; Naples, D.; Nayak, N.; Nelson, J. K.; Nichol, R.; Niner, E.; Norman, A.; Nosek, T.; Oksuzian, Y.; Olshevskiy, A.; Olson, T.; Paley, J.; Patterson, R. B.; Pawloski, G.; Pershey, D.; Petrova, O.; Petti, R.; Phan-Budd, S.; Plunkett, R. K.; Potukuchi, B.; Principato, C.; Psihas, F.; Radovic, A.; Rameika, R. A.; Rebel, B.; Rojas, P.; Ryabov, V.; Sachdev, K.; Samoylov, O.; Sanchez, M. C.; Sepulveda-Quiroz, J.; 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.; Talaga, R. L.; Tas, P.; Thayyullathil, R. B.; Thomas, J.; Tiras, E.; Tognini, S. C.; Torbunov, D.; Tripathi, J.; Tsaris, A.; Torun, Y.; Urheim, J.; Vahle, P.; Vasel, J.; Vinton, L.; Vokac, P.; Vold, A.; Vrba, T.; Wang, B.; Warburton, T. K.; Wetstein, M.; Whittington, D.; Wojcicki, S. G.; Wolcott, J.; Yang, S.; Yu, S.; Zalesak, J.; Zamorano, B.; Zwaska, R.

We present updated results from the NOvA experiment for $$\nu_\mu\rightarrow\nu_\mu$$ and $$\nu_\mu\rightarrow\nu_e$$ oscillations from an exposure of $$8.85\times10^{20}$$ protons on target, which represents an increase of 46% compared to our previous publication. The results utilize significant improvements in both the simulations and analysis of the data. A joint fit to the data for $$\nu_\mu$$ disappearance and $$\nu_e$$ appearance gives the best fit point as normal mass hierarchy, $$\Delta m^2_{32} = 2.44\times 10^{-3}{{\rm eV}^2}/c^4$$, $$\sin^2\theta_{23} = 0.56$$, and $$\delta_{CP} = 1.21\pi$$. The 68.3% confidence intervals in the normal mass hierarchy are $$\Delta m^2_{32} \in [2.37,2.52]\times 10^{-3}{{\rm eV}^2}/c^4$$, $$\sin^2\theta_{23} \in [0.43,0.51] \cup [0.52,0.60]$$, and $$\delta_{CP} \in [0,0.12\pi] \cup [0.91\pi,2\pi]$$. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: NOvA
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1466438
• Alternate ID(s): OSTI ID: 1462110
• Report Number(s): FERMILAB-PUB-18-223-ND; arXiv:1806.00096; PRVDAQ; 032012
• Journal Information: Physical Review D, Journal Name: Physical Review D Vol. 98 Journal Issue: 3; ISSN 2470-0010
• Publisher: American Physical Society
• Country of Publication: United States
• Language: English

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