ENERGY-FLOW AND PARTICLE SPECTRA WITH RESPECT TO THE REACTION PLANE FOR AU+AU COLLISIONS AT AGS ENERGIES

Transverse energy how is studied by exploiting the near 4 pi calorimet ric coverage of experiment E877. A Fourier decomposition of the azimut hal transverse energy distributions in different regions of pseudorapi dity is performed as a function of the centrality in order to describe the event shape. The extracted coefficients are compared to model pre dictions. Using the E877 forward spectrometer, triple differential cro ss section for protons and pi(+) are measured with respect to the reac tion plane determined by calorimeters. The variation of slope paramete rs at different orientations to the reaction plane is obtained by fitt ing to thermal Boltxmann distributions.