Updated results from the appearance searches for nu(mu) --> nu(tau) and nu(e) --> nu(tau) oscillations in the full NOMAD data sample are reported. The increased data and the use of more refined kinematic schemes for the nu(tau) CC selection allow a significant improvement of the overall sensitivity. The "blind analysis" of both the deep-inelastic and the low multiplicity samples yields no evidence for an oscillation signal. In the two-family oscillation scenario, this sets a 90% C.L. region in the sin(2)2 theta(mu tau) - Delta m(2) plane which includes sin(2)2 theta(mu tau) < 4.4 X 10(-4) at large Delta m(2) and Delta m(2) < 0.8 eV(2)/c(4) at sin(2)2 theta(mu tau) = 1. The corresponding contour in the nu(e) --> nu(tau) oscillation hypothesis results in sin(2)2 theta(e tau) < 2.2 X 10(-2) at large Delta m(2) and Delta m(2) < 6.5 eV(2)/c(4) at sin(2)2 theta(e tau) = 1. (C) 2000 Elsevier Science B.V. All rights reserved.

Astier, P., Autiero, D., Baldisseri, A., Baldo Ceolin, M., Ballocchi, G., Banner, M., et al. (2000). Updated results from the nu(tau) appearance search in NOMAD RID B-6634-2009 RID C-6672-2008. PHYSICS LETTERS. SECTION B, 483(4), 387-404 [10.1016/S0370-2693(00)00611-0].

Updated results from the nu(tau) appearance search in NOMAD RID B-6634-2009 RID C-6672-2008

ORESTANO, DOMIZIA;
2000-01-01

Abstract

Updated results from the appearance searches for nu(mu) --> nu(tau) and nu(e) --> nu(tau) oscillations in the full NOMAD data sample are reported. The increased data and the use of more refined kinematic schemes for the nu(tau) CC selection allow a significant improvement of the overall sensitivity. The "blind analysis" of both the deep-inelastic and the low multiplicity samples yields no evidence for an oscillation signal. In the two-family oscillation scenario, this sets a 90% C.L. region in the sin(2)2 theta(mu tau) - Delta m(2) plane which includes sin(2)2 theta(mu tau) < 4.4 X 10(-4) at large Delta m(2) and Delta m(2) < 0.8 eV(2)/c(4) at sin(2)2 theta(mu tau) = 1. The corresponding contour in the nu(e) --> nu(tau) oscillation hypothesis results in sin(2)2 theta(e tau) < 2.2 X 10(-2) at large Delta m(2) and Delta m(2) < 6.5 eV(2)/c(4) at sin(2)2 theta(e tau) = 1. (C) 2000 Elsevier Science B.V. All rights reserved.
2000
Astier, P., Autiero, D., Baldisseri, A., Baldo Ceolin, M., Ballocchi, G., Banner, M., et al. (2000). Updated results from the nu(tau) appearance search in NOMAD RID B-6634-2009 RID C-6672-2008. PHYSICS LETTERS. SECTION B, 483(4), 387-404 [10.1016/S0370-2693(00)00611-0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/119959
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