In:
Physical Review Letters, American Physical Society (APS), Vol. 133, No. 2 ( 2024-7-9)
Abstract:
Using data samples collected with the BESIII detector operating at the BEPCII storage ring, the cross section of the inclusive process e + e − → η + X , normalized by the total cross section of e + e − → hadrons , is measured at eight center-of-mass energy points from 2.0000 to 3.6710 GeV. These are the first measurements with momentum dependence in this energy region. Our measurement shows a significant discrepancy compared to the existing fragmentation functions. To address this discrepancy, a new QCD analysis is performed at the next-to-next-to-leading order with hadron mass corrections and higher twist effects, which can explain both the established high-energy data and our measurements reasonably well. Published by the American Physical Society 2024
Type of Medium:
Online Resource
ISSN:
0031-9007
,
1079-7114
DOI:
10.1103/PhysRevLett.133.021901
Language:
English
Publisher:
American Physical Society (APS)
Publication Date:
2024
detail.hit.zdb_id:
1472655-5
detail.hit.zdb_id:
208853-8
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