High Statistics Search for {nu}{sub {mu}}({bar {nu}}{sub {mu}}){r_arrow}{nu}{sub e}({bar {nu}}{sub e}) Oscillations in the Small Mixing Angle Regime
- University of Cincinnati, Cincinnati, Ohio 45221 (United States)
- Columbia University, New York, New York 10027 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- Kansas State University, Manhattan, Kansas 66506 (United States)
- Northwestern University, Evanston, Illinois 60208 (United States)
- University of Oregon, Eugene, Oregon 97403 (United States)
- University of Rochester, Rochester, New York 14627 (United States)
- University of Wisconsin, Madison, Wisconsin 53706 (United States)
Limits on {nu}{sub {mu}}({bar {nu}}{sub {mu}}){r_arrow}{nu}{sub e}({bar {nu}}{sub e}) oscillations based on a statistical separation of {nu}{sub e}N charged current interactions in the CCFR detector at Fermilab are presented. Neutrino energies range from 30 to 600GeV with a mean of 140GeV, and {nu}{sub {mu}} flight lengths vary from 0.9 to 1.4km. The result excludes oscillations in the region with sin{sup 2}2{alpha}{gt}1.8{times}10{sup -3} for large {Delta}m{sup 2}({gt}1000eV{sup 2}) and {Delta}m{sup 2}{gt}1.6eV{sup 2} for sin{sup 2}2{alpha}=1. This result is the most stringent limit to date for {Delta}m{sup 2}{gt}25eV{sup 2} and it excludes the high {Delta}m{sup 2} oscillation region favored by the LSND experiment. The {nu}{sub {mu}}-to-{nu}{sub e} cross-section ratio was measured as a test of {nu}{sub {mu}}({bar {nu}}{sub {mu}}){leftrightarrow}{nu}{sub e}({bar {nu}}{sub e}) universality to be 1.026{plus_minus}0.025(stat){plus_minus}0.049(syst). {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 554236
- Journal Information:
- Physical Review Letters, Vol. 78, Issue 15; Other Information: PBD: Apr 1997
- Country of Publication:
- United States
- Language:
- English
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