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Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e(+)e(-) annihilation at root s=10.58 GeV

Title
Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e(+)e(-) annihilation at root s=10.58 GeV
Author
천병구
Keywords
PHYSICS EVENT GENERATION; E+E-ANNIHILATION; ASYMMETRIES; FRAGMENTATION; SCATTERING; SIMULATION; COLLINS; JETS
Issue Date
2019-06
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 99, no. 11, article no. 112006
Abstract
We report measurements of the production cross sections of charged pions, kaons, and protons as a function of fractional energy, the event-shape variable called thrust, and the transverse momentum with respect to the thrust axis. These measurements access the transverse momenta created in the fragmentation process, which are of critical importance to the understanding of any transverse-momentum-dependent distribution and fragmentation functions. The low transverse-momentum part of the cross sections can be well described by Gaussians in transverse momentum as is generally assumed but the fractional-energy dependence is nontrivial and different hadron types have varying Gaussian widths. The width of these Gaussians decreases with thrust and shows an initially rising, then decreasing fractional-energy dependence. The widths for pions and kaons are comparable within uncertainties, while those for protons are significantly narrower. These single-hadron cross sections and Gaussian widths arc obtained from a 558 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.112006https://repository.hanyang.ac.kr/handle/20.500.11754/151574
ISSN
2470-0010; 2470-0029
DOI
10.1103/PhysRevD.99.112006
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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