Invariant-mass and fractional-energy dependence of inclusive production of di-hadrons in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 10.58 GeV

Abstract

The inclusive cross sections for di-hadrons of charged pions and kaons ($e^{+}{e}^{-}\to hhX$) 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 di-hadrons 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 $655{\mathrm{fb}}^{-1}$ data sample collected at or near the ${\rm Y}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider.

21 pages, 18 figures plus 25 figures in supplemental material, submitted to PRD

References in corpus (6)

• Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at \sqrt{s} = 10.58 GeV
• Angular dependences in inclusive two-hadron production at BELLE
• Tau and muon pair production cross-sections in electron-positron annihilations at sqrt{s} = 10.58 GeV
• Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs
• Evolution equations for extended dihadron fragmentation functions
• Realistic estimate of valence transversity distributions from inclusive dihadron production

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• Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 10.58 GeV
• Extraction of the higher-twist parton distribution $e(x)$ from CLAS data
• Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV
• Dihadron fragmentation functions in the quark-jet model: Transversely polarized quarks
• Update of inclusive cross sections of single and pairs of identified light charged hadrons
• Production cross sections of light and charmed mesons in $e^{+}{e}^{-}$ annihilation near 10.58 GeV
• Dihadron fragmentation framework for near-side energy-energy correlators
• The hadron pair forward-backward asymmetry in the electron positron annihilation process