NOMAD

Collaboration:

- Italy: Univ. of Calabria and INFN, Cosenza; Univ. of Florence and INFN, Florence, Univ. of Padova and INFN, Padova; Univ. of Pavia and INFN, Pavia; Univ. of Pisa and INFN, Pisa; Roma-III Univ., Rome; Univ. of Urbino, Urbino, and INFN Florence;
- CERN, Geneva, Switzerland
- Australia: University of Melbourne, Melbourne; Univ. of Sydney, Sydney
- Croatia: Rudjer Boskovic Institute, Zagreb
- France: DAPNIA, CEA Saclay; LAPP, Annecy; LPNHE, Univ. of Paris, Paris VI and VII
- Germany: Dortmund Univ., Dortmund;
- Russia: JINR, Dubna; nst. Nucl. Research, INR Moscow
- Switzerland: Institute for Particle Physics, ETH Honggerberg, Zurich,; University of Lausanne, Lausanne
- USA: Univ. of Massachusetts, Amherst, MA; Johns Hopkins Univ., Baltimore, MD; Harvard Univ., Cambridge, MA; UCLA, Los Angeles, CA;

Laboratory and beam: CERN Geneva, wide band neutrino beam

1. Goal of the Experiment

> The NOMAD (Neutrino Oscillation MAgnetic Detector) experiment has been designed to search for the nm-nt oscillation, in the region of mass difference dm2 of several eV2 - a region of cosmological interest - with a sensitivity on P(nm-nt) about 2. 10-4 . The experiment has terminated the data taking.

> More on the experiment...

2.

Activity during 2001

> Continuation of the data analysis

3. INFN contribution to the experiment in terms of manpower and financial support

> - While the group has no financial requests for the Year 2002, a part of the partecipating Italian Institutions have submitted minimal requests of funding on the expense chapter "Dotazioni Gruppo II" for terminating the analysis activity. These requests are presently under examination.

4. Publications in refereed journal (in 2001): 7

5. Conference talks (in 2001) : 1

6. Number of undergraduate and doctoral thesis on the experiment:

> 23 (of which 12 italian) undergraduated and 33 (of which 4 italian) PhD thesis.

> 2 phd thesis in 2001.

7. Leadership roles and primary responsibilities in the experiment

> - The spokesperson is L. Di Lella. The italian group leader is M. Baldo Ceolin.

> - The INFN groups had the responsibility for the design, realization, maintenance and exploitation of the electromagnetic calorimeter.

> - The INFN groups gave significant contribution to the analysis of both nm-nt and nm-neoscillation and to the precise understanding of the beam composition.

8. Innovative instruments

> - A 3 ton active target made of large area (3x3 m2) and low density (r~0.1 g/cm3) drift chambers with 200 mm resolution.

> - A large area (3x3 m2) transition radiation detector allowing to reject pions to the 10-3 level with an electron identification efficiency of 90 %.

> - An omogeneous electromagnetic calorimeter with sE/E=3.2%/E1/2+1% operating inside a magnetic field.

9. Competing experiments

> Chorus experiment at the Cern wide band beam.

10. International committee which has reviewed the experiment

> The CERN SPSC and the CERN Research Board.