M. Szeptycka

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The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3)  eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst).(More)
High Energy Physics, Vienna, 1968, edited by J. Prentki and J. Steinberger (CERN, Geneva, 1968). 'OS. 0 . Holmgren, S. Nilsson, T. Olhede, and N. Yamdagni, Nuovo Cimento 57A, 20 (1968). "G. Goldhaber, W. B. Fowler, S. Goldhaber, T. F. Hoang, T. E. Kalogeropoulos, W. M. Powell, Phys. Rev. Lett. 3, 181 (1959); G. Goldhaber, S. Goldhaber, W. Lee, and A. Pais,(More)
The final phase of the ICARUS physics program requires a sensitive mass of liquid Argon of 5000 tons or more. This is still true today, even after the operation of large or the planning of even larger underground detectors. The superior bubble-chamber-like features of the ICARUS detector will always provide additional and fundamental contributions to the(More)
Detection of Cherenkov light emission in liquid argon has been obtained with an ICARUS prototype, during a dedicated test run at the Gran Sasso Laboratory external facility. Ionizing tracks from cosmic ray muons crossing the detector active volume have been collected in coincidence with visible light signals from a photo-multiplier (PMT) immersed in liquid(More)
The measurement of the correlation between the transverse spin components of + ? pairs collected during 1992 to 1994 with the DELPHI detector at LEP1 is presented. A value ? 0:12 (syst.) was obtained for the correlation parameter, in agreement with the Standard Model expectation.
In an analysis of multihadronic events recorded at LEP by DELPHI in the years 1992 through 1994, charged hadrons are identiied using the measurement of their energy loss and their Cherenkov angle. Rapidity correlations of-, proton-proton, and-proton pairs are compared. The agreement with the string and cluster fragmentation models is tested. For those pairs(More)
The performance of the High-density Projection Chamber (HPC), the barrel electromagnetic calorimeter of the DELPHI experiment, is described. The detector adopts the time projection technique in order to obtain exceptionally ne spatial granularity in the three coordinates ( 2 20 mrad in with nine samplings along the shower axes), using a limited number of(More)
Correlations between pions from diierent Ws in e + e ? !W + W ? events are studied using data collected by the DELPHI detector at LEP running at a centre-of-mass energy of 172 GeV in 1996. At the present level of statistics, no enhancement of the correlation function above that expected from a pair of uncorrelated Ws is observed at small values of the(More)
An inclusive measurement of the average multiplicity of b b pairs from gluons, g b b , in hadronic Z 0 events collected by the DELPHI experiment at LEP, is presented. A counting technique, based on jet b-tagging in 4-jet events, has been used. Looking for secondary bottom production in events with production of any primary avour, by requiring two b-tagged(More)
P. Abreu a, W. A d a m b, T. Adye c, E. Agasi d, G.D. Alekseev e A. Algeri f, P. Allen g, S. Almehed h, S.J. Alvsvaag i, U. AmaldiJ, E.G. Anassontzis k, A. Andreazza e, P. Antilogus m, W.-D. Apel n, R.J. Aps imon c B. Asman o, J.-E. Augustin P, A. August inus a, P. BaillonJ, P. Bambade P, F. Barao a, R. Barate q, G. Barbiellini r, D.Y. Bardin e, G. Barker(More)