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

Name: Invariant-mass and fractional-energy dependence of inclusive production of di-hadrons in $e^+e^-$ annihilation at $\sqrt{s}=$ 10.58 GeV
Keywords: quark: distribution function, Upsilon(10570): electroproduction, BELLE, electron positron: colliding beams, electron positron: annihilation, event shape analysis, spin: dependence, 10.58 GeV-cms, 530, mass dependence

descriptionPublicationkeyboard_double_arrow_right Report 01 Jan 2017 English Publisher:Deutsches Elektronen-Synchrotron, DESY, Hamburg

Authors: Seidl, R.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aushev, T.; Ayad, R.; +156 Authors

doi: 10.3204/pubdb-2017-10924

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

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Abstract

The inclusive cross sections for dihadrons 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 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 ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider.

Physical review / D 96(3), 032005(2017). doi:10.1103/PhysRevD.96.032005

Published by American Physical Society, Woodbury, NY

Keywords

quark: distribution function, Upsilon(10570): electroproduction, BELLE, electron positron: colliding beams, electron positron: annihilation, event shape analysis, spin: dependence, 10.58 GeV-cms, 530, mass dependence, energy dependence, KEK-B, K: pair production, fractional, parton, thrust, pi: pair production, hadron: fragmentation function, channel cross section: measured, inclusive production, transversity, experimental results

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