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April 10, 2024Open Access

Measurement of the Born cross section for e⁺e⁻→ η hc at center-of-mass energies between 4.1 and 4.6\,GeV

BESIII Collaboration F. De Mori М. Н. Ачасов P. Adlarson O. Afedulidis X. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina I. Balossino Y. Ban H. -R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao Selim Çetin J. F. Chang G. R. Che G. Chelkov C. Chen C. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. G. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Fan J. Fang J. Fang S. Fang W. X. Fang Y. Q. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng M. Fritsch C. D. Fu J. Fu Y. W. Fu H. Gao X. B. Gao Yu Gao

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Abstract

We measure the Born cross section for the reaction e⁺e⁻ → η hc from √s = 4.129 to $4.600$~GeV using data sets collected by the BESIII detector running at the BEPCII collider. A resonant structure in the cross section line shape near 4.200~GeV is observed with a statistical significance of 7σ. The parameters of this resonance are measured to be \ and , where the first uncertainties are statistical and the second systematic.

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Cite This Study

Collaboration et al. (2024) studied this question.

synapsesocial.com/papers/68e6fa9eb6db6435876753c8 https://doi.org/10.48550/arxiv.2404.06718

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