Produção Nacional
Revisado por pares
First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
2019; American Physical Society; Volume: 123; Issue: 15 Linguagem: Inglês
10.1103/physrevlett.123.151803
ISSN1092-0145
AutoresM. A. Acero, P. Adamson, L. Aliaga, T. Alion, V. Allakhverdian, S. Altakarli, Н. Анфимов, A. Antoshkin, A. Aurisano, H.O. Back, C. Backhouse, M. Baird, N. Balashov, Pierre Baldi, Bindu A. Bambah, S. Bashar, K. Bays, S. Bending, Robert Bernstein, V. Bhatnagar, B. Bhuyan, J. M. Bian, Tom Blackburn, J. Blair, A. Booth, P. Bour, C. Bromberg, N. J. Buchanan, A. Butkevich, S. Calvez, M. Campbell, Timothy J. Carroll, E. Catano-Mur, A. Cedeno, S. Childress, B. C. Choudhary, Badrul A. Chowdhury, T. E. Coan, M. Colo, J. Cooper, L. A. Corwin, L. Cremonesi, G. S. Davies, P. F. Derwent, P. F. Ding, Z. Djurcic, D. Doyle, E. C. Dukes, H. Duyang, S. Edayath, R. Ehrlich, M. Elkins, G. J. Feldman, P. Filip, W. Flanagan, M. J. Frank, H. Gallagher, R. P. Gandrajula, F. Gao, S. Germani, A. Giri, R. A. Gomes, M. C. Goodman, V. Grichine, M. Groh, R. C. Group, B. Guo, A. Habig, F. Hakl, J. Hartnell, R. Hatcher, A. Hatzikoutelis, K. Heller, J. Hewes, A. Himmel, A. Holin, B. Howard, J. Huang, J. Hylen, F. Jediny, Calvin Johnson, M. Judah, I. Kakorin, D. Kalra, Daniel M. Kaplan, R. Keloth, O. Klimov, L. W. Koerner, L. Kolupaeva, S.K. Kotelnikov, I. Kourbanis, A. Kreymer, Ch. Kulenberg, Arun Kumar, C. Kuruppu, V. Kus, T. Lackey, K. Lang, S. Lin, M. Lokajı́ček, J. Lozier, S. Luchuk, K. Maan, S. Magill, W. A. Mann, Marvin L. Marshak, M. Martinez-Casales, V. Matveev, D. P. Méndez, M. D. Messier, H. Meyer, T. Miao, William H. Miller, S. Mishra, A. Mislivec, Rukmani Mohanta, A. Moren, L. Mualem, M. Muether, S. Mufson, K. Mulder, Robert Murphy, J. Musser, D. Naples, N. Nayak, J. K. Nelson, R. J. Nichol, Grant Nikseresht, E. Niner, A. Norman, T. Nosek, A. Olshevskiy, T. Olson, J. Paley, R. B. Patterson, G. Pawloski, D. Pershey, O. Petrova, R. Petti, D. D. Phan, R. Plunkett, B. Potukuchi, C. Principato, F. Psihas, A. Radovic, V. Raj, R. Rameika, B. Rebel, P. Rojas, V. A. Ryabov, O. Samoylov, M. C. Sánchez, S. Sánchez Falero, I. S. Seong, P. Shanahan, A. Sheshukov, P. Singh, V. Singh, E. Smith, J. Smolík, P. Snopok, N. Solomey, Eunhye Song, A. Sousa, K. Soustružnı́k, M. Strait, L. Suter, A. Sutton, R. L. Talaga, B. Tapia Oregui, P. Tas, R. B. Thayyullathil, J. Thomas, E. Tiras, D. Torbunov, J. Tripathi, Aristeidis Tsaris, Y. Torun, J. Urheim, P. Vahle, J. Vasel, L. Vinton, P. Vokac, T. Vrba, M. Wallbank, B. Wang, T. K. Warburton, M. Wetstein, M. While, D. Whittington, S. G. Wojcicki, J. Wolcott, Nitin Yadav, A. Yallappa Dombara, K. Yonehara, S. Yu, S. Zadorozhnyy, J. Zálešâk, B. Zamorano, R. Zwaska,
Tópico(s)Particle physics theoretical and experimental studies
ResumoThe 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$\sigma$.
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