Improved measurement of neutrino oscillation parameters by the NOvA experiment

被引:121
作者
Acero, M. A. [2 ]
Adamson, P. [12 ]
Aliaga, L. [12 ]
Anfimov, N. [26 ]
Antoshkin, A. [26 ]
Arrieta-Diaz, E. [28 ]
Asquith, L. [41 ]
Aurisano, A. [6 ]
Back, A. [20 ,24 ]
Backhouse, C. [45 ]
Baird, M. [20 ,41 ,46 ]
Balashov, N. [26 ]
Baldi, P. [25 ]
Bambah, B. A. [17 ]
Bashar, S. [44 ]
Bays, K. [4 ,19 ]
Bernstein, R. [12 ]
Bhatnagar, V [34 ]
Bhattarai, D. [32 ]
Bhuyan, B. [14 ]
Bian, J. [25 ,31 ]
Blair, J. [16 ]
Booth, A. C. [41 ]
Bowles, R. [20 ]
Bromberg, C. [29 ]
Buchanan, N. [8 ]
Butkevich, A. [22 ]
Calvez, S. [8 ]
Carroll, T. J. [43 ,49 ]
Catano-Mur, E. [48 ]
Choudhary, B. C. [10 ]
Christensen, A. [8 ]
Coan, T. E. [39 ]
Colo, M. [48 ]
Cremonesi, L. [36 ,45 ]
Davies, G. S. [20 ,32 ]
Derwent, P. F. [12 ]
Ding, P. [12 ]
Djurcic, Z. [1 ]
Dolce, M. [44 ]
Doyle, D. [8 ]
Tonguino, D. Duenas [6 ]
Dukes, E. C. [46 ]
Duyang, H. [38 ]
Ehrlich, R. [46 ]
Elkins, M. [24 ]
Ewart, E. [20 ]
Feldman, G. J. [15 ]
Filip, P. [23 ]
Franc, J. [9 ]
机构
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Univ Atlantico, Carrera 30 8-49, Puerto Colombia, Atlantico, Colombia
[3] Banaras Hindu Univ, Inst Sci, Dept Phys, Varanasi 221005, Uttar Pradesh, India
[4] CALTECH, Pasadena, CA 91125 USA
[5] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, Prague, Czech Republic
[6] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA
[7] Cochin Univ Sci & Technol, Dept Phys, Kochi 682022, India
[8] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
[9] Czech Tech Univ, Brehova 7, Prague 11519 1, Czech Republic
[10] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
[11] Erciyes Univ, Dept Phys, TR-38030 Kayseri, Turkey
[12] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[13] Univ Fed Goias, Inst Fis, BR-74690900 Goiania, Go, Brazil
[14] IIT Guwahati, Dept Phys, Gauhati 781039, India
[15] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[16] Univ Houston, Dept Phys, Houston, TX 77204 USA
[17] Univ Hyderabad, Sch Phys, Hyderabad 500046, India
[18] IIT Hyderabad, Dept Phys, Hyderabad 502205, India
[19] IIT, Chicago, IL 60616 USA
[20] Indiana Univ, Bloomington, IN 47405 USA
[21] Czech Acad Sci, Inst Comp Sci, Prague 18207, Czech Republic
[22] Acad Sci, Inst Nucl Res Russia, 7a 60th October Anniversary Prospect, Moscow 117312, Russia
[23] Czech Acad Sci, Inst Phys, Prague 18221, Czech Republic
[24] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[25] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[26] Joint Inst Nucl Res, Moscow 141980, Russia
[27] Lebedev Phys Inst, Nucl Phys & Astrophys Div, Leninsky Prospect 53, Moscow 119991, Russia
[28] Univ Magdalena, Carrera 32 22-08, Santa Marta, Colombia
[29] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[30] Univ Minnesota, Dept Phys & Astron, Duluth, MN 55812 USA
[31] Univ Minnesota Twin Cities, Sch Phys & Astron, Minneapolis, MN 55455 USA
[32] Univ Mississippi, University, MS 38677 USA
[33] Natl Inst Sci Educ & Res, Khurja 752050, Odisha, India
[34] Panjab Univ, Dept Phys, Chandigarh 160014, India
[35] Univ Pittsburgh, Dept Phys, Pittsburgh, PA 15260 USA
[36] Queen Mary Univ London, Sch Phys & Astron, London E1 4NS, England
[37] Univ S Alabama, Dept Phys, Mobile, AL 36688 USA
[38] Univ South Carolina, Dept Phys & Astron, Columbia, SC 29208 USA
[39] Southern Methodist Univ, Dept Phys, Dallas, TX 75275 USA
[40] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[41] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England
[42] Syracuse Univ, Dept Phys, Syracuse, NY 13210 USA
[43] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
[44] Tufts Univ, Dept Phys & Astron, Medford, MA 02155 USA
[45] UCL, Phys & Astron Dept, Gower St, London WC1E 6BT, England
[46] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA
[47] Wichita State Univ, Dept Math Stat & Phys, Wichita, KS 67206 USA
[48] William & Mary, Dept Phys, Williamsburg, VA 23187 USA
[49] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
关键词
TOTAL CROSS-SECTIONS; CP VIOLATION; PIONS; ABSORPTION; SCATTERING; PROTONS; NUCLEI; LEPTOGENESIS; BARYOGENESIS; ANTIPROTONS;
D O I
10.1103/PhysRevD.106.032004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present new nu(mu) -> nu(e), nu(mu) -> nu(mu), (nu) over bar (mu) -> (nu) over bar (e), and (nu) over bar (mu) -> (nu) over bar (mu) oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over the previously reported results. The additional data, combined with previously published neutrino and antineutrino data, are all analyzed using improved techniques and simulations. A joint fit to the nu(e), nu(mu), (nu) over bar (e), and (nu) over bar (mu), candidate samples within the 3-flavor neutrino oscillation framework continues to yield a best-fit point in the normal mass ordering and the upper octant of the theta(23) mixing angle, with Delta m(32)(2) = (2.41 +/- 0.07) x 10(-3) eV(2) and sin(2)theta(23) = 0.57(-0.04)(+0.03). The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of nu(e) and (nu) over bar (e) appearance. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of delta(CP) = pi/2 which arc excluded by > 3 sigma for the inverted mass ordering, and values around delta(CP) = 3 pi/2 in the normal ordering which are disfavored at 2 sigma confidence.
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页数:12
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