Phys. Rev. Lett.
92,
091801
(2004)
[4 pages]
Search for π0→νμν̅ μ Decays in the LSND Detector
L. B. Auerbach et al. LSND Collaboration
Show All Authors/Affiliations
Hide All Authors/Affiliations
L. B. Auerbach8, R. L. Burman5, D. O. Caldwell3, E. D. Church1,*, A. K. Cochran7, J. B. Donahue5, A. R. Fazely7,†, G. T. Garvey5, R. M. Gunasingha7, R. L. Imlay6, G. Kahrimanis7, W. C. Louis5, R. Majkic8, A. Malik6, K. L. McIlhany1, W. J. Metcalf6, G. B. Mills5, D. Rupnik7, V. D. Sandberg5, D. Smith4, R. F. Somodi7, I. Stancu1,‡, W. D. Strossman1, M. Sung6, R. Tayloe5,§, G. J. VanDalen1,**, W. Vernon2, N. Wadia6, D. H. White5, S. Yellin3, and H. Yi7 (LSND Collaboration)
1University of California, Riverside, California 92521, USA 2University of California, San Diego, California 92093, USA 3University of California, Santa Barbara, California 93106, USA 4Embry Riddle Aeronautical University, Prescott, Arizona 86301, USA 5Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 6Louisiana State University, Baton Rouge, Louisiana 70803, USA 7Southern University, Baton Rouge, Louisiana 70813, USA 8Temple University, Philadelphia, Pennsylvania 19122, USA
Received 30 October 2003; published 4 March 2004
We observe a net beam excess of 8.7±6.3(stat)±2.4(syst) events, above 160 MeV, resulting from the charged-current reaction of νμ and/or ν̅ μ on C and H in the LSND detector. No beam-related muon background is expected in this energy regime. Within an analysis framework of π0→νμν̅ μ, we set a direct upper limit for this branching ratio of Γ(π0→νμν̅ μ)/Γ(π0→all)<1.6×10-6 at 90% confidence level.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.091801
DOI:
10.1103/PhysRevLett.92.091801
PACS:
13.20.Cz, 14.40.Aq, 14.60.St
*Present address: Prediction Company LLC, Sante Fe, NM 87505, USA. †Electronic address: fazely@phys.subr.edu ‡Present address: Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA. §Present address: Department of Physics, Indiana University, Bloomington, IN 47405, USA. **Present address: Embry Riddle Aeronautical University, Prescott, AZ 86301, USA.
|
|