L
L. Wai
Researcher at Stanford University
Publications - 37
Citations - 7142
L. Wai is an academic researcher from Stanford University. The author has contributed to research in topics: Dark matter & Weakly interacting massive particles. The author has an hindex of 17, co-authored 36 publications receiving 6803 citations. Previous affiliations of L. Wai include Yahoo! & University of Washington.
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Journal ArticleDOI
Evidence for oscillation of atmospheric neutrinos
Y. Fukuda,T. Hayakawa,E. Ichihara,Kunio Inoue,K. Ishihara,H. Ishino,Yoshitaka Itow,Takaaki Kajita,J. Kameda,S. Kasuga,Ken-ichiro Kobayashi,Yohei Kobayashi,Yusuke Koshio,M. Miura,Masayuki Nakahata,S. Nakayama,A. Okada,Ko Okumura,N. Sakurai,Masato Shiozawa,Yoshihiro Suzuki,Y. Takeuchi,Y. Totsuka,Shinya Yamada,M. Earl,Alec Habig,E. Kearns,M. D. Messier,Kate Scholberg,J. L. Stone,Lawrence Sulak,C. W. Walter,M. Goldhaber,T. Barszczxak,D. Casper,W. Gajewski,P. G. Halverson,J. Hsu,W. R. Kropp,L. R. Price,Frederick Reines,Michael B. Smy,Henry W. Sobel,Mark R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,D. Takemori,T. Ishii,Junichi Kanzaki,T. Kobayashi,S. Mine,K. Nakamura,K. Nishikawa,Yuichi Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,M. Kohama,A. T. Suzuki,Todd Haines,Todd Haines,E. Blaufuss,B. K. Kim,R. Sanford,R. Svoboda,M. L. Chen,Z. Conner,Z. Conner,J. A. Goodman,G. W. Sullivan,J. Hill,C. K. Jung,K. Martens,C. Mauger,C. McGrew,E. Sharkey,B. Viren,C. Yanagisawa,W. Doki,Kazumasa Miyano,H. Okazawa,C. Saji,M. Takahata,Y. Nagashima,M. Takita,Takashi Yamaguchi,Minoru Yoshida,Soo-Bong Kim,M. Etoh,K. Fujita,Akira Hasegawa,Takehisa Hasegawa,S. Hatakeyama,T. Iwamoto,M. Koga,Tomoyuki Maruyama,Hiroshi Ogawa,J. Shirai,A. Suzuki,F. Tsushima,Masatoshi Koshiba,M. Nemoto,Kyoshi Nishijima,T. Futagami,Y. Hayato,Y. Kanaya,K. Kaneyuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,R. A. Doyle,J. S. George,A. L. Stachyra,L. Wai,L. Wai,R. J. Wilkes,K. K. Young +124 more
Abstract: We present an analysis of atmospheric neutrino data from a 33.0 kton yr (535-day) exposure of the Super-Kamiokande detector. The data exhibit a zenith angle dependent deficit of muon neutrinos which is inconsistent with expectations based on calculations of the atmospheric neutrino flux. Experimental biases and uncertainties in the prediction of neutrino fluxes and cross sections are unable to explain our observation. The data are consistent, however, with two-flavor ${\ensuremath{
u}}_{\ensuremath{\mu}}\ensuremath{\leftrightarrow}{\ensuremath{
u}}_{\ensuremath{\tau}}$ oscillations with ${sin}^{2}2\ensuremath{\theta}g0.82$ and $5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}l\ensuremath{\Delta}{m}^{2}l6\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}3}\mathrm{eV}{}^{2}$ at 90% confidence level.
Journal ArticleDOI
The Super-Kamiokande detector
S. Fukuda,Y. Fukuda,T. Hayakawa,E. Ichihara,M. Ishitsuka,Yoshitaka Itow,Takaaki Kajita,J. Kameda,K. Kaneyuki,S. Kasuga,K. Kobayashi,Y. Kobayashi,Yusuke Koshio,M. Miura,S. Moriyama,Masayuki Nakahata,S. Nakayama,Toshio Namba,Y. Obayashi,A. Okada,M. Oketa,Kimihiro Okumura,T. Oyabu,N. Sakurai,Masato Shiozawa,Yoshihiro Suzuki,Y. Takeuchi,T. Toshito,Y. Totsuka,Shoichi Yamada,S. Desai,M. Earl,J. T. Hong,E. Kearns,M. Masuzawa,M. D. Messier,M. D. Messier,J. L. Stone,L. R. Sulak,C. W. Walter,W. Wang,Kate Scholberg,T. Barszczak,David William Casper,D. W. Liu,W. Gajewski,P. G. Halverson,J. Hsu,W. R. Kropp,S. Mine,L. R. Price,Frederick Reines,M. B. Smy,Henry W. Sobel,M. R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,Y. Hayato,T. Ishii,A. K. Ichikawa,Junichi Kanzaki,T. Kobayashi,T. Maruyama,Koji Nakamura,Y. Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,T. Iwashita,M. Kohama,Atsumu Suzuki,Masaya Hasegawa,T. Inagaki,I. Kato,H. Maesaka,Tsuyoshi Nakaya,K. Nishikawa,Shuji Yamamoto,Todd Haines,Todd Haines,B. K. Kim,R. Sanford,R. Svoboda,E. Blaufuss,M. L. Chen,Z. Conner,Z. Conner,J. A. Goodman,E. Guillian,G. W. Sullivan,D. Turcan,Alec Habig,M. Ackerman,Florian Goebel,J. Hill,J. Hill,C. K. Jung,T. Kato,D. Kerr,Magdalena Malek,K. Martens,C. Mauger,C. McGrew,E. Sharkey,B. Viren,B. Viren,C. Yanagisawa,W. Doki,S. Inaba,K. Ito,M. Kirisawa,M. Kitaguchi,C. Mitsuda,K. Miyano,C. Saji,M. Takahata,M. Takahashi,K. Higuchi,Y. Kajiyama,A. Kusano,Y. Nagashima,K. Nitta,M. Takita,Takashi Yamaguchi,Minoru Yoshida,Hyosun Kim,Soo-Bong Kim,J. Yoo,H. Okazawa,M. Etoh,K. Fujita,Y. Gando,Akira Hasegawa,T. Hasegawa,S. Hatakeyama,Kunio Inoue,K. Ishihara,T. Iwamoto,M. Koga,I. Nishiyama,Hiroshi Ogawa,J. Shirai,A. Suzuki,T. Takayama,F. Tsushima,M. Koshiba,Y. Ichikawa,T. Hashimoto,Y. Hatakeyama,M. Koike,T. Horiuchi,M. Nemoto,K. Nishijima,H. Takeda,H. Fujiyasu,T. Futagami,Hirokazu Ishino,Y. Kanaya,Mikio Morii,H. Nishihama,Hiroaki Nishimura,Toshio Suzuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,U. Golebiewska,H. G. Berns,S. B. Boyd,S. B. Boyd,R. A. Doyle,J. S. George,J. S. George,A. L. Stachyra,A. L. Stachyra,L. Wai,L. Wai,R. J. Wilkes,K. K. Young,H. Kobayashi +186 more
TL;DR: Super-Kamiokande is the world's largest water Cherenkov detector, with net mass 50,000 tons as discussed by the authors, which collected 1678 live-days of data, observing neutrinos from the Sun, Earth's atmosphere, and the K2K long-baseline neutrino beam with high efficiency.
Journal ArticleDOI
Observation of muon neutrino disappearance with the MINOS detectors in the NuMI neutrino beam
D. G. Michael,P. Adamson,P. Adamson,P. Adamson,T. Alexopoulos,W.W.M. Allison,G. J. Alner,Kevin Anderson,C. Andreopoulos,M. P. Andrews,R. Andrews,K. E. Arms,R. Armstrong,C. Arroyo,D. J. Auty,S. Avvakumov,D. S. Ayres,B. Baller,B. C. Barish,M. A. Barker,Peter D. Barnes,G.D. Barr,William L. Barrett,E. Beall,E. Beall,B. R. Becker,A. Belias,T. Bergfeld,R. H. Bernstein,D. Bhattacharya,M. Bishai,Andrew Blake,V. Bocean,B. Bock,G. J. Bock,J. Boehm,D. J. Boehnlein,D. Bogert,P. M. Border,C. R. Bower,S. Boyd,E. Buckley-Geer,C. Bungau,A. Byon-Wagner,Anatael Cabrera,John Derek Chapman,Thomas R. Chase,D. Cherdack,S. Chernichenko,S. Childress,B. C. Choudhary,B. C. Choudhary,J. H. Cobb,J. D. Cossairt,H. Courant,D. Crane,A. J. Culling,J. W. Dawson,J. K. de Jong,D. M. DeMuth,A. De Santo,M. Dierckxsens,M. V. Diwan,M. Dorman,M. Dorman,G. Drake,D. Drakoulakos,R. Ducar,T. Durkin,A. R. Erwin,Carlos Escobar,J. J. Evans,O. Fackler,E. Falk Harris,G. J. Feldman,N. Felt,T. H. Fields,R. Ford,M. V. Frohne,H. R. Gallagher,M. Gebhard,G. A. Giurgiu,A. Godley,J. Gogos,M. C. Goodman,Yu. A. Gornushkin,P. Gouffon,R. Gran,E. Grashorn,N. Grossman,J. J. Grudzinski,K. Grzelak,V. J. Guarino,Alec Habig,R. Halsall,J. Hanson,D. A. Harris,Philip Harris,J. Hartnell,J. Hartnell,E. P. Hartouni,R. Hatcher,Ken Heller,N. Hill,Y. Ho,A. Holin,C. Howcroft,C. Howcroft,J. Hylen,M. Ignatenko,D. Indurthy,G. M. Irwin,M. Ishitsuka,D. E. Jaffe,C. James,L. Jenner,D. A. Jensen,T. Joffe-Minor,T. Kafka,H. J. Kang,S. M S Kasahara,J. Kilmer,Hyun-Chul Kim,M. S. Kim,G. Koizumi,Sacha E Kopp,M. Kordosky,M. Kordosky,D. J. Koskinen,D. J. Koskinen,M. Kostin,S. K. Kotelnikov,D. Krakauer,A. E. Kreymer,S. Kumaratunga,A. S. Ladran,Karol Lang,C. Laughton,A. Lebedev,R. Lee,Weonjong Lee,M. Libkind,Ji-Yong Liu,P. J. Litchfield,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,Marvin L Marshak,John Marshall,N. Mayer,J. McDonald,A. M. McGowan,A. M. McGowan,J. R. Meier,G. I. Merzon,M. D. Messier,M. D. Messier,R. H. Milburn,John Miller,John Miller,Warner A. Miller,S.R. Mishra,S.R. Mishra,A. Mislivec,P. S. Miyagawa,C. D. Moore,Jorge G. Morfin,R. Morse,L. Mualem,S. L. Mufson,S. Murgia,M. J. Murtagh,J. A. Musser,D. Naples,C. Nelson,J. K. Nelson,J. K. Nelson,J. K. Nelson,Harvey B Newman,F. A. Nezrick,R. J. Nichol,T. C. Nicholls,Juan Pedro Ochoa-Ricoux,J. Oliver,W. P. Oliver,V.A. Onuchin,T. Osiecki,R. Ospanov,J. M. Paley,V. Paolone,A. Para,T. Patzak,Ž Pavlović,G. F. Pearce,N. Pearson,C. W. Peck,Carole C. Perry,E. A. Peterson,D. A. Petyt,D. A. Petyt,D. A. Petyt,H. Ping,R. Piteira,R. Pittam,A. Pla-Dalmau,R. K. Plunkett,L. E. Price,M. Proga,D. Pushka,D. Rahman,R. A. Rameika,T. M. Raufer,A. L. Read,B. Rebel,B. Rebel,J. Reichenbacher,D. E. Reyna,C. Rosenfeld,H. A. Rubin,K. Ruddick,V. A. Ryabov,Ruben Saakyan,Mcd Sanchez,Mcd Sanchez,Niki Saoulidou,J. Schneps,Paul Schoessow,P. Schreiner,Reinhard Schwienhorst,V. K. Semenov,S. M. Seun,P. Shanahan,P.D. Shield,W. Smart,V. Smirnitsky,Caleb Smith,Caleb Smith,Caleb Smith,P. N. Smith,A. Sousa,A. Sousa,B. Speakman,P. Stamoulis,A. Stefanik,P. Sullivan,J. M. Swan,P. A. Symes,N. Tagg,N. Tagg,R. L. Talaga,Alexander Terekhov,E. Tetteh-Lartey,Juergen Thomas,Juergen Thomas,Juergen Thomas,J. A. Thompson,M. A. Thomson,J. L. Thron,G. Tinti,R. Trendler,J. Trevor,I. Trostin,V. A. Tsarev,G. Tzanakos,J. Urheim,J. Urheim,P. Vahle,P. Vahle,M. Vakili,K. Vaziri,C. Velissaris,V. Verebryusov,B. Viren,L. Wai,C. P. Ward,D. R. Ward,M. Watabe,A. C. Weber,A. C. Weber,R. C. Webb,A. A. Wehmann,N. West,C. White,Randall White,Stanley G. Wojcicki,Douglas Wright,Q. K. Wu,W. G. Yan,T. Yang,Francisco Yumiceva,J. C. Yun,H. Zheng,M. Zois,R. Zwaska,R. Zwaska +302 more
TL;DR: In this article, the MINOS experiment reported results from its initial exposure to neutrinos from the Fermilab NuMI beam, and the rate and energy spectra of charged current muon neutrino interactions are compared in two detectors located along the beam axis at distances of 1 km and 735 km.
Journal ArticleDOI
Measurement of the Flux and Zenith-Angle Distribution of Upward Throughgoing Muons by Super-Kamiokande
Y. Fukuda,T. Hayakawa,E. Ichihara,Kunio Inoue,K. Ishihara,H. Ishino,Yoshitaka Itow,Takaaki Kajita,J. Kameda,S. Kasuga,Ken-ichiro Kobayashi,Y. Kobayashi,Yusuke Koshio,M. Miura,Masayuki Nakahata,Shoei Nakayama,A. Okada,Ko Okumura,Nobuyuki Sakurai,Masato Shiozawa,Yasunari Suzuki,Y. Takeuchi,Y. Totsuka,Shinya Yamada,M. Earl,Alec Habig,E. Kearns,M. D. Messier,Kate Scholberg,J. L. Stone,L. R. Sulak,C. W. Walter,M. Goldhaber,T. Barszczak,David William Casper,W. Gajewski,W. R. Kropp,L. R. Price,Frederick Reines,Michael B. Smy,H. W. Sobel,Mark R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,D. Takemori,T. Ishii,Junichi Kanzaki,T. Kobayashi,S. Mine,K. Nakamura,K. Nishikawa,Yuichi Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,M. Kohama,Atsumu Suzuki,Todd Haines,Todd Haines,E. Blaufuss,B. K. Kim,R. Sanford,R. Svoboda,M. L. Chen,J. A. Goodman,G. W. Sullivan,J. Hill,C. K. Jung,K. Martens,C. Mauger,C. McGrew,E. Sharkey,B. Viren,C. Yanagisawa,W. Doki,Kazumasa Miyano,H. Okazawa,C. Saji,M. Takahata,Y. Nagashima,M. Takita,Takashi Yamaguchi,Minoru Yoshida,Soo-Bong Kim,M. Etoh,K. Fujita,Akira Hasegawa,Takehisa Hasegawa,S. Hatakeyama,T. Iwamoto,M. Koga,Tomoyuki Maruyama,Hiroshi Ogawa,J. Shirai,A. Suzuki,F. Tsushima,Masatoshi Koshiba,M. Nemoto,Kyoshi Nishijima,T. Futagami,Y. Hayato,Y. Kanaya,K. Kaneyuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,R. A. Doyle,J. S. George,J. S. George,A. L. Stachyra,L. Wai,L. Wai,R. J. Wilkes,K. K. Young +121 more
TL;DR: A total of 614 upward throughgoing muons were observed by Super-Kamiokande during 537 detector live days and the measured muon flux is [1.74{plus_minus} 0.02(sys)]{times} 10{sup {minus}13} cm{sup 2}thinsp2{theta} {gt}0.
Journal ArticleDOI
Constraints on neutrino oscillation parameters from the measurement of day-night solar neutrino fluxes at super-kamiokande
Y. Fukuda,T. Hayakawa,E. Ichihara,Kunio Inoue,K. Ishihara,H. Ishino,Yoshitaka Itow,Takaaki Kajita,J. Kameda,S. Kasuga,Ken-ichiro Kobayashi,Y. Kobayashi,Yusuke Koshio,M. Miura,Masayuki Nakahata,Shoei Nakayama,A. Okada,Ko Okumura,Nobuyuki Sakurai,Masato Shiozawa,Yasunari Suzuki,Y. Takeuchi,Y. Totsuka,Shinya Yamada,M. Earl,Alec Habig,E. Kearns,M. D. Messier,Kate Scholberg,J. L. Stone,L. R. Sulak,C. W. Walter,M. Goldhaber,T. Barszczak,David William Casper,W. Gajewski,P. G. Halverson,J. Hsu,W. R. Kropp,L. R. Price,Frederick Reines,Michael B. Smy,H. W. Sobel,Mark R. Vagins,K. S. Ganezer,W. E. Keig,R. W. Ellsworth,S. Tasaka,J. W. Flanagan,A. Kibayashi,John G. Learned,S. Matsuno,V. J. Stenger,D. Takemori,T. Ishii,Junichi Kanzaki,T. Kobayashi,S. Mine,K. Nakamura,K. Nishikawa,Yuichi Oyama,A. Sakai,Makoto Sakuda,Osamu Sasaki,S. Echigo,M. Kohama,Atsumu Suzuki,Todd Haines,Todd Haines,E. Blaufuss,B. K. Kim,R. Sanford,R. Svoboda,M. L. Chen,Z. Conner,Z. Conner,J. A. Goodman,G. W. Sullivan,J. Hill,C. K. Jung,K. Martens,C. Mauger,C. McGrew,E. Sharkey,B. Viren,C. Yanagisawa,W. Doki,Kazumasa Miyano,H. Okazawa,C. Saji,M. Takahata,Y. Nagashima,M. Takita,Takashi Yamaguchi,Minoru Yoshida,Soo-Bong Kim,M. Etoh,K. Fujita,Akira Hasegawa,T. Hasagawa,S. Hatakeyama,T. Iwamoto,M. Koga,Tomoyuki Maruyama,Hiroshi Ogawa,J. Shirai,A. Suzuki,F. Tsushima,Masatoshi Koshiba,M. Nemoto,Kyoshi Nishijima,T. Futagami,Y. Hayato,Y. Kanaya,K. Kaneyuki,Y. Watanabe,D. Kielczewska,D. Kielczewska,R. A. Doyle,J. S. George,A. L. Stachyra,L. Wai,L. Wai,R. J. Wilkes,K. K. Young +124 more
TL;DR: In this article, a search for day-night variations in the solar neutrino flux resulting from neutrinos oscillations has been carried out using the 504 day sample of solar NE data obtained at Super-Kamiokande.