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Lawrence Berkeley National Laboratory Recent Work Title Experimental search for the " LSND anomaly " with the ICARUS detector in the CNGS neutrino beam Permalink
| Content Provider | Semantic Scholar |
|---|---|
| Author | Antonello, Marco Baibussinov, Bagdat Benetti, Paula Calligarich, E. Canci, N. Cesana, Alberto Cieślik, Krzysztof Cline, David B. Cocco, A. G. Dąbrowska, Anna Dequal, Daniele Dermenev, A. V. Dolfini, R. Farnese, C. Fava, Antonella Ferrari, Arnaud Fiorillo, Giuliana Gibin, Davide Gninenko, Sergei Guglielmi, Alberto Haranczyk, Maciej Holeczek, Jacek Ivashkin, A. B. Kirsanov, Mikhail Kisiel, Jan Kochanek, Iza Lagoda, Justyna Mania, Szymon Menegolli, Alessandro Meng, Guangsi Montanari, Cinzia Otwinowski, Stanislaw Piazzoli, Alessandro Picchi, P. Pietropaolo, Francesco Plonski, Patrick Rappoldi, A. Raselli, Gian Luca Rossella, Massimo Rubbia, Carlo Sala, Paola R. Scantamburlo, Enrico Scaramelli, Alejandro Segreto, Evan Sergiampietri, Franco Stefan, Dorota Stepaniak, J. Sulej, Robert Szarska, M. Terrani, Michael Varanini, Filippo Ventura, Silvia Vignoli, Carmelo Wang, H. G. Yang, Xue-Feng Zalewska, Anna Zaremba, Krzysztof |
| Copyright Year | 2013 |
| Abstract | We report an early result from the ICARUS experiment on the search for a νμ → νe signal due to the LSND anomaly. The search was performed with the ICARUS T600 detector located at the Gran Sasso Laboratory, receiving CNGS neutrinos from CERN at an average energy of about 20 GeV, after a flight path of ∼730 km. The LSND anomaly would manifest as an excess of νe events, characterized by a fast energy oscillation averaging approximately to sin2(1.27 mnewL/Eν) ≈ 1/2 with probability Pνμ→νe = 1/2 sin(2θnew). The present analysis is based on 1091 neutrino events, which are about 50 % of the ICARUS data collected in 2010–2011. Two clear νe events have been found, compared with the expectation of 3.7 ± 0.6 events from conventional sources. Within the range of our observations, this result is compatible with the absence of a LSND anomaly. At 90 % and 99 % confidence levels the limits of 3.4 and 7.3 events corresponding to oscillation probabilities 〈Pνμ→νe 〉 ≤ 5.4 × 10−3 and 〈Pνμ→νe 〉 ≤ 1.1 × 10−2 are set respectively. The result strongly limits the window of open options for the LSND anomaly to a narrow region around ( m2, sin(2θ))new = (0.5 eV2,0.005), where there is an overall agreement (90 % CL) between the present ICARUS limit, the published limits of KARMEN and the published positive signals of LSND and MiniBooNE Collaborations. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cloudfront.escholarship.org/dist/prd/content/qt2896x4dp/qt2896x4dp.pdf?t=p03p23 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
