A study of the hadronic angular distribution in (e + e - ) processes from 1.2 to 3.0 GeV
M. Bernardini;D. Bollini;P. L. Brunini;B. Fiorentino;T. Massam;L. Monari;F. Palmonari;F. Rimondi;A. Zichichi;M. Bernardini;D. Bollini;P. L. Brunini;B. Fiorentino;T. Massam;L. Monari;F. Palmonari;F. Rimondi;A. Zichichi;
il nuovo cimento a (1965-1970)2008Vol. 26pp. 163-168
195
bernardini2008ila
Abstract
The angular distribution of 2720 tracks of 1085 hadronic final states produced from (e+e-) annihilation has been studied in the 1.2 to 3.0 GeV total centre-of-mass energy range. If we parametrize the angular distribution in terms off(θ) =1 + A cos2 θ, where 6 is the angle between the hadronic track produced and the colliding-beam direction, the results show thatA is less than 0.21, with 90% confidence.