Recent results on light quark fragmentation from belle

This contribution reviews recent results on fragmentation function related measurements from Belle data. It concentrates on the most recent result of the measurement of azimuthal modulations in the cross-section of di-pion pairs in di-jet production from electron positron annihilation. In particular, Belle recently performed the first measurement of an azimuthal modulation of the cross-section which may arise from the dependence of the di-pion fragmentation function on the helicity of the parent quark. This fragmentation function G1has not been measured previously and it is of particular interest, because it vanishes if the intrinsic transverse momentum in the fragmentation process is not taken into account. Within uncertainties no significant signal for G v11is observed.

Duke Scholars

Author Anselm G. Vossen Physics