Analytical formula for the cross section of hadron production from e + e − collisions around the narrow charmouinum resonances

The paper reports an analytical formula for the production cross section of e + e − annihilation to hadrons in the vicinity of a narrow resonance, particularly in the τ -charm region, while considering initial state radiation. Despite some approximations in its derivation, comparison between the ana...

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Bibliographic Details
Published in:Chinese physics C 2024-11, Vol.48 (11), p.113104
Main Authors: Wang, Ya-Nan, Wang, Ya-Di, Wang, Ping
Format: Article
Language:English
Subjects:
analytic form
initial state radiation
observed cross section
production cross section
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Summary:The paper reports an analytical formula for the production cross section of e + e − annihilation to hadrons in the vicinity of a narrow resonance, particularly in the τ -charm region, while considering initial state radiation. Despite some approximations in its derivation, comparison between the analytical formula and direct integration of ISR shows good accuracy, indicating that the analytical formula meets current experimental requirements. Furthermore, this paper presents a comparison of the cross section between the analytical formula and calculations using the ConExc Monte Carlo generator. The efficiency of the analytical formula in significantly reducing computing time makes it a favorable choice for the regression procedure to extract the parameters of narrow charmonium resonances in experiments.
ISSN:1674-1137
2058-6132
DOI:10.1088/1674-1137/ad6c09