Marko Bracko (Jozef Stefan Institute)
The $e^+ e^−$ annihilation process provides an access to the fragmentation functions due to its clean environment. Using the high-statistics dataset accumulated by the Belle detector at the KEKB asymmetric-energy $e^+ e^−$ collider, we report the first measurements of the double differential cross section of identified di-hadrons (pions and kaons) with respect to the two hadron's fractional energies for any charge and hadron combinations. In addition, we also present an extraction of azimuthal correlation between two pairs of charged pions detected in opposite jets from $e^+ e^−$ annihilation.
Submitted on behalf of the Belle collaboration.
Actual presenter will be selected by the Belle collaboration at a later time.