The cross section asymmetry Z of the deuteron photodisintegration process d(y. pn) has been measured in the energy range 0.3-1.0 GeV for proton c~ angles of 45, 60, 75 and 90". n e data obtained are compared with predictions of the existing theoretical models, based on the conventional approach, as well as with the results of Kharkov multipole analysis which takes into account the contribution of dibaryon resonances. Neither of these theoretical models describes the experimental data satisfactorily.

AbsbacL An experimental sNdy of Canpton scanering 00 pmtons by Linearly polarized photons has been carried out m the kinematical m g e E , = 0.5-1.0 CcV and 6' ; . = 85-125". Results oblained on Ihe a s s -s e c t i o n asymmetry X are cmpared wilh the various model predidim.

The first combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 20 to 300 GeV at an incident angle of about 11 is well-described by the expression =E = 46:5 6:0 = p E + 1 : 2 0 : 3 3:2 0:4 GeV=E. Shower profiles, shower leakage, and the angular resolution of hadronic showers were also studied.

The cross section asymmetry Sigma for the reaction gamma n to pi -p by linearly polarised photons was measured in the energy range Egamma =0.8-1.75 GeV and pion CM angles between 45 and 90 degrees . The results are compared with the predictions of phenomenological models.

A new combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 10 to 300 GeV at an incident S. Akhmadaliev et al. / Nuclear Instruments and Methods in Physics Research A 449 (2000) 461}477 463In the collider reference system, which has been adopted here, the z-axis indicates the LHC beam line, the x-and y-axis the horizontal and the vertical directions, while and are the azimuthal and polar angle, respectively. The pseudorapidity is de"ned as "!ln(tan( /2)).angle of about 123 is well described by the expression /E"((41.9$1.6)%/(E#(1.8$0.1)%)(1.8$0.1)/E, where E is in GeV. The response to electrons and muons was evaluated. Shower pro"les, shower leakage and the angular resolution of hadronic showers were also studied. Results are compared with those from the previous beam test.