First observations of separated atmospheric νμ and ν̄μ events in the MINOS detector

P. Adamson; T. Alexopoulos; W. W M Allison; G. J. Alner; K. Anderson; C. Andreopoulos; M. Andrews; R. Andrews; C. Arroyo; S. Avvakumov; D. S. Ayres; B. Baller; B. Barish; M. A. Barker; P. D. Barnes; G. Barr; W. L. Barrett; E. Beall; B. R. Becker; A. Belias; T. Bergfeld; R. H. Bernstein; D. Bhattacharya; M. Bishai; A. Blake; V. Bocean; B. Bock; G. J. Bock; J. Boehm; D. J. Boehnlein; D. Bogert; P. M. Border; C. Bower; S. Boyd; E. Buckley-Geer; A. Byon-Wagner; A. Cabrera; J. D. Chapman; T. R. Chase; S. K. Chernichenko; S. Childress; B. C. Choudhary; J. H. Cobb; J. D. Cossairt; H. Courant; D. A. Crane; A. J. Culling; J. W. Dawson; D. M. DeMuth; A. De Santo; M. Dierckxsens; M. V. Diwan; M. Dorman; G. Drake; R. Ducar; T. Durkin; A. R. Erwin; C. O. Escobar; J. Evans; O. D. Fackler; E. Falk Harris; G. J. Feldman; N. Felt; T. H. Fields; R. Ford; M. V. Frohne; H. R. Gallagher; M. Gebhard; A. Godley; J. Gogos; M. C. Goodman; Yu Gornushkin; P. Gouffon; E. Grashorn; N. Grossman; J. J. Grudzinski; K. Grzelak; V. Guarino; A. Habig; R. Halsall; J. Hanson; D. Harris; P. G. Harris; J. Hartnell; E. P. Hartouni; R. Hatcher; K. Heller; N. Hill; Y. Ho; C. Howcroft; J. Hylen; M. Ignatenko; D. Indurthy; G. M. Irwin; C. James; L. Jenner; D. Jensen; T. Joffe-Minor; T. Kafka; H. J. Kang; S. M S Kasahara; J. Kilmer; H. Kim; G. Koizumi; S. Kopp; M. Kordosky; D. J. Koskinen; M. Kostin; D. A. Krakauer; S. Kumaratunga; A. S. Ladran; K. Lang; C. Laughton; A. Lebedev; R. Lee; W. Y. Lee; M. A. Libkind; J. Liu; P. J. Litchfield; R. P. Litchfield; N. P. Longley; P. Lucas; W. Luebke; S. Madani; E. Maher; V. Makeev; W. A. Mann; A. Marchionni; A. D. Marino; M. L. Marshak; J. S. Marshall; J. McDonald; A. McGowan; J. R. Meier; G. I. Merzon; M. D. Messier; D. G. Michael; R. H. Milburn; J. L. Miller; W. H. Miller; S. R. Mishra; P. S. Miyagawa; C. Moore; J. Morfín; R. Morse; L. Mualem; S. Mufson; S. Murgia; M. J. Murtagh; J. Musser; D. Naples; C. Nelson; J. K. Nelson; H. B. Newman; F. Nezrick; R. J. Nichol; T. C. Nicholls; J. P. Ochoa-Ricoux; J. Oliver; W. P. Oliver; V. A. Onuchin; T. Osiecki; R. Ospanov; J. Paley; V. Paolone; A. Para; T. Patzak; Z. Pavlovich; G. F. Pearce; N. Pearson; C. W. Peck; C. Perry; E. A. Peterson; D. A. Petyt; H. Ping; R. Piteira; A. Pla-Dalmau; R. K. Plunkett; L. E. Price; M. Proga; D. R. Pushka; D. Rahman; R. A. Rameika; T. M. Raufer; A. L. Read; B. Rebel; D. E. Reyna; C. Rosenfeld; H. A. Rubin; K. Ruddick; V. A. Ryabov; R. Saakyan; M. C. Sanchez; N. Saoulidou; J. Schneps; P. V. Schoessow; P. Schreiner; R. Schwienhorst; V. K. Semenov; S. M. Seun; P. Shanahan; P. D. Shield; W. Smart; V. Smirnitsky; C. Smith; P. N. Smith; A. Sousa; B. Speakman; P. Stamoulis; A. Stefanik; P. Sullivan; J. M. Swan; P. A. Symes; N. Tagg; R. L. Talaga; E. Tetteh-Lartey; J. Thomas; J. Thompson; M. A. Thomson; J. L. Thron; R. Trendler; J. Trevor; I. Trostin; V. A. Tsarev; G. Tzanakos; J. Urheim; P. Vahle; M. Vakili; K. Vaziri; C. Velissaris; V. Verebryusov; B. Viren; L. Wai; C. P. Ward; D. R. Ward; M. Watabe; A. Weber; R. C. Webb; A. Wehmann; N. West; C. White; R. F. White; S. G. Wojcicki; D. M. Wright; Q. K. Wu; W. G. Yan; T. Yang; F. X. Yumiceva; J. C. Yun; H. Zheng; M. Zois; R. Zwaska

doi:10.1103/PhysRevD.73.072002

First observations of separated atmospheric νμ and ν̄μ events in the MINOS detector

P. Adamson, T. Alexopoulos, W. W M Allison, G. J. Alner, K. Anderson, C. Andreopoulos, M. Andrews, R. Andrews, C. Arroyo, S. Avvakumov, D. S. Ayres, B. Baller, B. Barish, M. A. Barker, P. D. Barnes, G. Barr, W. L. Barrett, E. Beall, B. R. Becker, A. BeliasT. Bergfeld, R. H. Bernstein, D. Bhattacharya, M. Bishai, A. Blake, V. Bocean, B. Bock, G. J. Bock, J. Boehm, D. J. Boehnlein, D. Bogert, P. M. Border, C. Bower, S. Boyd, E. Buckley-Geer, A. Byon-Wagner, A. Cabrera, J. D. Chapman, T. R. Chase, S. K. Chernichenko, S. Childress, B. C. Choudhary, J. H. Cobb, J. D. Cossairt, H. Courant, D. A. Crane, A. J. Culling, J. W. Dawson, D. M. DeMuth, A. De Santo, M. Dierckxsens, M. V. Diwan, M. Dorman, G. Drake, R. Ducar, T. Durkin, A. R. Erwin, C. O. Escobar, J. Evans, O. D. Fackler, E. Falk Harris, G. J. Feldman, N. Felt, T. H. Fields, R. Ford, M. V. Frohne, H. R. Gallagher, M. Gebhard, A. Godley, J. Gogos, M. C. Goodman, Yu Gornushkin, P. Gouffon, E. Grashorn, N. Grossman, J. J. Grudzinski, K. Grzelak, V. Guarino, A. Habig, R. Halsall, J. Hanson, D. Harris, P. G. Harris, J. Hartnell, E. P. Hartouni, R. Hatcher, K. Heller, N. Hill, Y. Ho, C. Howcroft, J. Hylen, M. Ignatenko, D. Indurthy, G. M. Irwin, C. James, L. Jenner, D. Jensen, T. Joffe-Minor, T. Kafka, H. J. Kang, S. M S Kasahara, J. Kilmer, H. Kim, G. Koizumi, S. Kopp, M. Kordosky, D. J. Koskinen, M. Kostin, D. A. Krakauer, S. Kumaratunga, A. S. Ladran, K. Lang, C. Laughton, A. Lebedev, R. Lee, W. Y. Lee, M. A. Libkind, J. Liu, P. J. Litchfield, R. P. Litchfield, N. P. Longley, P. Lucas, W. Luebke, S. Madani, E. Maher, V. Makeev, W. A. Mann, A. Marchionni, A. D. Marino, M. L. Marshak, J. S. Marshall, J. McDonald, A. McGowan, J. R. Meier, G. I. Merzon, M. D. Messier, D. G. Michael, R. H. Milburn, J. L. Miller, W. H. Miller, S. R. Mishra, P. S. Miyagawa, C. Moore, J. Morfín, R. Morse, L. Mualem, S. Mufson, S. Murgia, M. J. Murtagh, J. Musser, D. Naples, C. Nelson, J. K. Nelson, H. B. Newman, F. Nezrick, R. J. Nichol, T. C. Nicholls, J. P. Ochoa-Ricoux, J. Oliver, W. P. Oliver, V. A. Onuchin, T. Osiecki, R. Ospanov, J. Paley, V. Paolone, A. Para, T. Patzak, Z. Pavlovich, G. F. Pearce, N. Pearson, C. W. Peck, C. Perry, E. A. Peterson, D. A. Petyt, H. Ping, R. Piteira, A. Pla-Dalmau, R. K. Plunkett, L. E. Price, M. Proga, D. R. Pushka, D. Rahman, R. A. Rameika, T. M. Raufer, A. L. Read, B. Rebel, D. E. Reyna, C. Rosenfeld, H. A. Rubin, K. Ruddick, V. A. Ryabov, R. Saakyan, M. C. Sanchez, N. Saoulidou, J. Schneps, P. V. Schoessow, P. Schreiner, R. Schwienhorst, V. K. Semenov, S. M. Seun, P. Shanahan, P. D. Shield, W. Smart, V. Smirnitsky, C. Smith, P. N. Smith, A. Sousa, B. Speakman, P. Stamoulis, A. Stefanik, P. Sullivan, J. M. Swan, P. A. Symes, N. Tagg, R. L. Talaga, E. Tetteh-Lartey, J. Thomas, J. Thompson, M. A. Thomson, J. L. Thron, R. Trendler, J. Trevor, I. Trostin, V. A. Tsarev, G. Tzanakos, J. Urheim, P. Vahle, M. Vakili, K. Vaziri, C. Velissaris, V. Verebryusov, B. Viren, L. Wai, C. P. Ward, D. R. Ward, M. Watabe, A. Weber, R. C. Webb, A. Wehmann, N. West, C. White, R. F. White, S. G. Wojcicki, D. M. Wright, Q. K. Wu, W. G. Yan, T. Yang, F. X. Yumiceva, J. C. Yun, H. Zheng, M. Zois, R. Zwaska

Research output: Contribution to journal › Article › peer-review

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Abstract

The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of νμ and ν̄μ charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward- to downward-going events in the data is compared to the Monte Carlo expectation in the absence of neutrino oscillations, giving Rup/downdata/Rup/downMC=0.62-0.14+0.19(stat.) ±0.02(sys.). An extended maximum likelihood analysis of the observed L/E distributions excludes the null hypothesis of no neutrino oscillations at the 98% confidence level. Using the curvature of the observed muons in the 1.3 T MINOS magnetic field νμ and ν̄μ interactions are separated. The ratio of ν̄μ to νμ events in the data is compared to the Monte Carlo expectation assuming neutrinos and antineutrinos oscillate in the same manner, giving Rν̄μ/νμdata/Rν̄μ/νμMC=0.96-0. 27+0.38(stat.)±0.15(sys.), where the errors are the statistical and systematic uncertainties. Although the statistics are limited, this is the first direct observation of atmospheric neutrino interactions separately for νμ and ν̄μ.

Original language	English (US)
Article number	072002
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	73
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.73.072002
State	Published - 2006

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Adamson, P., Alexopoulos, T., Allison, W. W. M., Alner, G. J., Anderson, K., Andreopoulos, C., Andrews, M., Andrews, R., Arroyo, C., Avvakumov, S., Ayres, D. S., Baller, B., Barish, B., Barker, M. A., Barnes, P. D., Barr, G., Barrett, W. L., Beall, E., Becker, B. R., ... Zwaska, R. (2006). First observations of separated atmospheric νμ and ν̄μ events in the MINOS detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 73(7), Article 072002. https://doi.org/10.1103/PhysRevD.73.072002

Adamson, P, Alexopoulos, T, Allison, WWM, Alner, GJ, Anderson, K, Andreopoulos, C, Andrews, M, Andrews, R, Arroyo, C, Avvakumov, S, Ayres, DS, Baller, B, Barish, B, Barker, MA, Barnes, PD, Barr, G, Barrett, WL, Beall, E, Becker, BR, Belias, A, Bergfeld, T, Bernstein, RH, Bhattacharya, D, Bishai, M, Blake, A, Bocean, V, Bock, B, Bock, GJ, Boehm, J, Boehnlein, DJ, Bogert, D, Border, PM, Bower, C, Boyd, S, Buckley-Geer, E, Byon-Wagner, A, Cabrera, A, Chapman, JD, Chase, TR, Chernichenko, SK, Childress, S, Choudhary, BC, Cobb, JH, Cossairt, JD, Courant, H, Crane, DA, Culling, AJ, Dawson, JW, DeMuth, DM, De Santo, A, Dierckxsens, M, Diwan, MV, Dorman, M, Drake, G, Ducar, R, Durkin, T, Erwin, AR, Escobar, CO, Evans, J, Fackler, OD, Harris, EF, Feldman, GJ, Felt, N, Fields, TH, Ford, R, Frohne, MV, Gallagher, HR, Gebhard, M, Godley, A, Gogos, J, Goodman, MC, Gornushkin, Y, Gouffon, P, Grashorn, E, Grossman, N, Grudzinski, JJ, Grzelak, K, Guarino, V, Habig, A, Halsall, R, Hanson, J, Harris, D, Harris, PG, Hartnell, J, Hartouni, EP, Hatcher, R, Heller, K, Hill, N, Ho, Y, Howcroft, C, Hylen, J, Ignatenko, M, Indurthy, D, Irwin, GM, James, C, Jenner, L, Jensen, D, Joffe-Minor, T, Kafka, T, Kang, HJ, Kasahara, SMS, Kilmer, J, Kim, H, Koizumi, G, Kopp, S, Kordosky, M, Koskinen, DJ, Kostin, M, Krakauer, DA, Kumaratunga, S, Ladran, AS, Lang, K, Laughton, C, Lebedev, A, Lee, R, Lee, WY, Libkind, MA, Liu, J, Litchfield, PJ, Litchfield, RP, Longley, NP, Lucas, P, Luebke, W, Madani, S, Maher, E, Makeev, V, Mann, WA, Marchionni, A, Marino, AD, Marshak, ML, Marshall, JS, McDonald, J, McGowan, A, Meier, JR, Merzon, GI, Messier, MD, Michael, DG, Milburn, RH, Miller, JL, Miller, WH, Mishra, SR, Miyagawa, PS, Moore, C, Morfín, J, Morse, R, Mualem, L, Mufson, S, Murgia, S, Murtagh, MJ, Musser, J, Naples, D, Nelson, C, Nelson, JK, Newman, HB, Nezrick, F, Nichol, RJ, Nicholls, TC, Ochoa-Ricoux, JP, Oliver, J, Oliver, WP, Onuchin, VA, Osiecki, T, Ospanov, R, Paley, J, Paolone, V, Para, A, Patzak, T, Pavlovich, Z, Pearce, GF, Pearson, N, Peck, CW, Perry, C, Peterson, EA, Petyt, DA, Ping, H, Piteira, R, Pla-Dalmau, A, Plunkett, RK, Price, LE, Proga, M, Pushka, DR, Rahman, D, Rameika, RA, Raufer, TM, Read, AL, Rebel, B, Reyna, DE, Rosenfeld, C, Rubin, HA, Ruddick, K, Ryabov, VA, Saakyan, R, Sanchez, MC, Saoulidou, N, Schneps, J, Schoessow, PV, Schreiner, P, Schwienhorst, R, Semenov, VK, Seun, SM, Shanahan, P, Shield, PD, Smart, W, Smirnitsky, V, Smith, C, Smith, PN, Sousa, A, Speakman, B, Stamoulis, P, Stefanik, A, Sullivan, P, Swan, JM, Symes, PA, Tagg, N, Talaga, RL, Tetteh-Lartey, E, Thomas, J, Thompson, J, Thomson, MA, Thron, JL, Trendler, R, Trevor, J, Trostin, I, Tsarev, VA, Tzanakos, G, Urheim, J, Vahle, P, Vakili, M, Vaziri, K, Velissaris, C, Verebryusov, V, Viren, B, Wai, L, Ward, CP, Ward, DR, Watabe, M, Weber, A, Webb, RC, Wehmann, A, West, N, White, C, White, RF, Wojcicki, SG, Wright, DM, Wu, QK, Yan, WG, Yang, T, Yumiceva, FX, Yun, JC, Zheng, H, Zois, M & Zwaska, R 2006, 'First observations of separated atmospheric νμ and ν̄μ events in the MINOS detector', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 73, no. 7, 072002. https://doi.org/10.1103/PhysRevD.73.072002

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title = "First observations of separated atmospheric νμ and {\=ν}μ events in the MINOS detector",

abstract = "The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of νμ and {\=ν}μ charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward- to downward-going events in the data is compared to the Monte Carlo expectation in the absence of neutrino oscillations, giving Rup/downdata/Rup/downMC=0.62-0.14+0.19(stat.) ±0.02(sys.). An extended maximum likelihood analysis of the observed L/E distributions excludes the null hypothesis of no neutrino oscillations at the 98% confidence level. Using the curvature of the observed muons in the 1.3 T MINOS magnetic field νμ and {\=ν}μ interactions are separated. The ratio of {\=ν}μ to νμ events in the data is compared to the Monte Carlo expectation assuming neutrinos and antineutrinos oscillate in the same manner, giving R{\=ν}μ/νμdata/R{\=ν}μ/νμMC=0.96-0. 27+0.38(stat.)±0.15(sys.), where the errors are the statistical and systematic uncertainties. Although the statistics are limited, this is the first direct observation of atmospheric neutrino interactions separately for νμ and {\=ν}μ.",

author = "P. Adamson and T. Alexopoulos and Allison, {W. W M} and Alner, {G. J.} and K. Anderson and C. Andreopoulos and M. Andrews and R. Andrews and C. Arroyo and S. Avvakumov and Ayres, {D. S.} and B. Baller and B. Barish and Barker, {M. A.} and Barnes, {P. D.} and G. Barr and Barrett, {W. L.} and E. Beall and Becker, {B. R.} and A. Belias and T. Bergfeld and Bernstein, {R. H.} and D. Bhattacharya and M. Bishai and A. Blake and V. Bocean and B. Bock and Bock, {G. J.} and J. Boehm and Boehnlein, {D. J.} and D. Bogert and Border, {P. M.} and C. Bower and S. Boyd and E. Buckley-Geer and A. Byon-Wagner and A. Cabrera and Chapman, {J. D.} and Chase, {T. R.} and Chernichenko, {S. K.} and S. Childress and Choudhary, {B. C.} and Cobb, {J. H.} and Cossairt, {J. D.} and H. Courant and Crane, {D. A.} and Culling, {A. J.} and Dawson, {J. W.} and DeMuth, {D. M.} and {De Santo}, A. and M. Dierckxsens and Diwan, {M. V.} and M. Dorman and G. Drake and R. Ducar and T. Durkin and Erwin, {A. R.} and Escobar, {C. O.} and J. Evans and Fackler, {O. D.} and Harris, {E. Falk} and Feldman, {G. J.} and N. Felt and Fields, {T. H.} and R. Ford and Frohne, {M. V.} and Gallagher, {H. R.} and M. Gebhard and A. Godley and J. Gogos and Goodman, {M. C.} and Yu Gornushkin and P. Gouffon and E. Grashorn and N. Grossman and Grudzinski, {J. J.} and K. Grzelak and V. Guarino and A. Habig and R. Halsall and J. Hanson and D. Harris and Harris, {P. G.} and J. Hartnell and Hartouni, {E. P.} and R. Hatcher and K. Heller and N. Hill and Y. Ho and C. Howcroft and J. Hylen and M. Ignatenko and D. Indurthy and Irwin, {G. M.} and C. James and L. Jenner and D. Jensen and T. Joffe-Minor and T. Kafka and Kang, {H. J.} and Kasahara, {S. M S} and J. Kilmer and H. Kim and G. Koizumi and S. Kopp and M. Kordosky and Koskinen, {D. J.} and M. Kostin and Krakauer, {D. A.} and S. Kumaratunga and Ladran, {A. S.} and K. Lang and C. Laughton and A. Lebedev and R. Lee and Lee, {W. Y.} and Libkind, {M. A.} and J. Liu and Litchfield, {P. J.} and Litchfield, {R. P.} and Longley, {N. P.} and P. Lucas and W. Luebke and S. Madani and E. Maher and V. Makeev and Mann, {W. A.} and A. Marchionni and Marino, {A. D.} and Marshak, {M. L.} and Marshall, {J. S.} and J. McDonald and A. McGowan and Meier, {J. R.} and Merzon, {G. I.} and Messier, {M. D.} and Michael, {D. G.} and Milburn, {R. H.} and Miller, {J. L.} and Miller, {W. H.} and Mishra, {S. R.} and Miyagawa, {P. S.} and C. Moore and J. Morf{\'i}n and R. Morse and L. Mualem and S. Mufson and S. Murgia and Murtagh, {M. J.} and J. Musser and D. Naples and C. Nelson and Nelson, {J. K.} and Newman, {H. B.} and F. Nezrick and Nichol, {R. J.} and Nicholls, {T. C.} and Ochoa-Ricoux, {J. P.} and J. Oliver and Oliver, {W. P.} and Onuchin, {V. A.} and T. Osiecki and R. Ospanov and J. Paley and V. Paolone and A. Para and T. Patzak and Z. Pavlovich and Pearce, {G. F.} and N. Pearson and Peck, {C. W.} and C. Perry and Peterson, {E. A.} and Petyt, {D. A.} and H. Ping and R. Piteira and A. Pla-Dalmau and Plunkett, {R. K.} and Price, {L. E.} and M. Proga and Pushka, {D. R.} and D. Rahman and Rameika, {R. A.} and Raufer, {T. M.} and Read, {A. L.} and B. Rebel and Reyna, {D. E.} and C. Rosenfeld and Rubin, {H. A.} and K. Ruddick and Ryabov, {V. A.} and R. Saakyan and Sanchez, {M. C.} and N. Saoulidou and J. Schneps and Schoessow, {P. V.} and P. Schreiner and R. Schwienhorst and Semenov, {V. K.} and Seun, {S. M.} and P. Shanahan and Shield, {P. D.} and W. Smart and V. Smirnitsky and C. Smith and Smith, {P. N.} and A. Sousa and B. Speakman and P. Stamoulis and A. Stefanik and P. Sullivan and Swan, {J. M.} and Symes, {P. A.} and N. Tagg and Talaga, {R. L.} and E. Tetteh-Lartey and J. Thomas and J. Thompson and Thomson, {M. A.} and Thron, {J. L.} and R. Trendler and J. Trevor and I. Trostin and Tsarev, {V. A.} and G. Tzanakos and J. Urheim and P. Vahle and M. Vakili and K. Vaziri and C. Velissaris and V. Verebryusov and B. Viren and L. Wai and Ward, {C. P.} and Ward, {D. R.} and M. Watabe and A. Weber and Webb, {R. C.} and A. Wehmann and N. West and C. White and White, {R. F.} and Wojcicki, {S. G.} and Wright, {D. M.} and Wu, {Q. K.} and Yan, {W. G.} and T. Yang and Yumiceva, {F. X.} and Yun, {J. C.} and H. Zheng and M. Zois and R. Zwaska",

year = "2006",

doi = "10.1103/PhysRevD.73.072002",

language = "English (US)",

volume = "73",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "7",

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TY - JOUR

T1 - First observations of separated atmospheric νμ and ν̄μ events in the MINOS detector

AU - Adamson, P.

AU - Alexopoulos, T.

AU - Allison, W. W M

AU - Alner, G. J.

AU - Anderson, K.

AU - Andreopoulos, C.

AU - Andrews, M.

AU - Andrews, R.

AU - Arroyo, C.

AU - Avvakumov, S.

AU - Ayres, D. S.

AU - Baller, B.

AU - Barish, B.

AU - Barker, M. A.

AU - Barnes, P. D.

AU - Barr, G.

AU - Barrett, W. L.

AU - Beall, E.

AU - Becker, B. R.

AU - Belias, A.

AU - Bergfeld, T.

AU - Bernstein, R. H.

AU - Bhattacharya, D.

AU - Bishai, M.

AU - Blake, A.

AU - Bocean, V.

AU - Bock, B.

AU - Bock, G. J.

AU - Boehm, J.

AU - Boehnlein, D. J.

AU - Bogert, D.

AU - Border, P. M.

AU - Bower, C.

AU - Boyd, S.

AU - Buckley-Geer, E.

AU - Byon-Wagner, A.

AU - Cabrera, A.

AU - Chapman, J. D.

AU - Chase, T. R.

AU - Chernichenko, S. K.

AU - Childress, S.

AU - Choudhary, B. C.

AU - Cobb, J. H.

AU - Cossairt, J. D.

AU - Courant, H.

AU - Crane, D. A.

AU - Culling, A. J.

AU - Dawson, J. W.

AU - DeMuth, D. M.

AU - De Santo, A.

AU - Dierckxsens, M.

AU - Diwan, M. V.

AU - Dorman, M.

AU - Drake, G.

AU - Ducar, R.

AU - Durkin, T.

AU - Erwin, A. R.

AU - Escobar, C. O.

AU - Evans, J.

AU - Fackler, O. D.

AU - Harris, E. Falk

AU - Feldman, G. J.

AU - Felt, N.

AU - Fields, T. H.

AU - Ford, R.

AU - Frohne, M. V.

AU - Gallagher, H. R.

AU - Gebhard, M.

AU - Godley, A.

AU - Gogos, J.

AU - Goodman, M. C.

AU - Gornushkin, Yu

AU - Gouffon, P.

AU - Grashorn, E.

AU - Grossman, N.

AU - Grudzinski, J. J.

AU - Grzelak, K.

AU - Guarino, V.

AU - Habig, A.

AU - Halsall, R.

AU - Hanson, J.

AU - Harris, D.

AU - Harris, P. G.

AU - Hartnell, J.

AU - Hartouni, E. P.

AU - Hatcher, R.

AU - Heller, K.

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PY - 2006

Y1 - 2006

N2 - The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of νμ and ν̄μ charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward- to downward-going events in the data is compared to the Monte Carlo expectation in the absence of neutrino oscillations, giving Rup/downdata/Rup/downMC=0.62-0.14+0.19(stat.) ±0.02(sys.). An extended maximum likelihood analysis of the observed L/E distributions excludes the null hypothesis of no neutrino oscillations at the 98% confidence level. Using the curvature of the observed muons in the 1.3 T MINOS magnetic field νμ and ν̄μ interactions are separated. The ratio of ν̄μ to νμ events in the data is compared to the Monte Carlo expectation assuming neutrinos and antineutrinos oscillate in the same manner, giving Rν̄μ/νμdata/Rν̄μ/νμMC=0.96-0. 27+0.38(stat.)±0.15(sys.), where the errors are the statistical and systematic uncertainties. Although the statistics are limited, this is the first direct observation of atmospheric neutrino interactions separately for νμ and ν̄μ.

AB - The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the first MINOS observations of νμ and ν̄μ charged-current atmospheric neutrino interactions based on an exposure of 418 days. The ratio of upward- to downward-going events in the data is compared to the Monte Carlo expectation in the absence of neutrino oscillations, giving Rup/downdata/Rup/downMC=0.62-0.14+0.19(stat.) ±0.02(sys.). An extended maximum likelihood analysis of the observed L/E distributions excludes the null hypothesis of no neutrino oscillations at the 98% confidence level. Using the curvature of the observed muons in the 1.3 T MINOS magnetic field νμ and ν̄μ interactions are separated. The ratio of ν̄μ to νμ events in the data is compared to the Monte Carlo expectation assuming neutrinos and antineutrinos oscillate in the same manner, giving Rν̄μ/νμdata/Rν̄μ/νμMC=0.96-0. 27+0.38(stat.)±0.15(sys.), where the errors are the statistical and systematic uncertainties. Although the statistics are limited, this is the first direct observation of atmospheric neutrino interactions separately for νμ and ν̄μ.

UR - http://www.scopus.com/inward/record.url?scp=33645573676&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645573676&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.73.072002

DO - 10.1103/PhysRevD.73.072002

M3 - Article

AN - SCOPUS:33645573676

SN - 1550-7998

VL - 73

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 7

M1 - 072002

ER -

First observations of separated atmospheric νμ and ν̄μ events in the MINOS detector

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