Invariant-mass and fractional-energy dependence of inclusive production of dihadrons in e + e ? annihilation at √s = 10.58 GeV
Journal
Physical Review D
Journal Volume
96
Journal Issue
3
Date Issued
2017
Author(s)
Seidl R.
Abstract
The inclusive cross sections for dihadrons of charged pions and kaons (e+e? → hhX) in electron-positron annihilation are reported. They are obtained as a function of the total fractional energy and invariant mass for any di-hadron combination in the same hemisphere as defined by the thrust event-shape variable and its axis. Since same-hemisphere dihadrons can be assumed to originate predominantly from the same initial parton, di-hadron fragmentation functions are probed. These di-hadron fragmentation functions are needed as an unpolarized baseline in order to quantitatively understand related spin-dependent measurements in other processes and to apply them to the extraction of quark transversity distribution functions in the nucleon. The di-hadron cross sections are obtained from a 655 fb?1 data sample collected at or near the ??4S? resonance with the Belle detector at the KEKB asymmetric-energy e?e? collider. ? 2017 American Physical Society.
SDGs
Type
journal article