Measurement of the e+e−→ΛΛ¯ cross section from threshold to 3.00 GeV using events with initial-state radiation

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P Xu ,Z J Chen ,C W Wang ,Tao Han ,S N Ruan ,F Z Qi ,Zhou Li ,X H Li ,L J Li ,Z A Liu ,R T ,D Y Wang ,L Z Liao ,М Н Ачасов ,H L Dai ,R P Guo ,L H Wu ,S C Coen ,H F Shen ,J G Lu ,P R Li ,M D Tat ,W Qian ,S L Olsen ,X X Ding ,X Y Shan ,Zhe Duan ,H N Li ,G F Xu ,Y H Zhan ,D H Zhang ,Chao Liang ,R S Shi ,Christoph Wenzel

doi:10.1103/physrevd.107.072005

Abstract

Using initial-state radiation events from a total integrated luminosity of 11.957 fb−1 of e+e− collision data collected at center-of-mass energies between 3.773 and 4.258 GeV with the BESIII detector at BEPCII, the cross section for the process e+e−→ΛΛ¯ is measured in 16 ΛΛ¯ invariant mass intervals from the production threshold up to 3.00 GeV/c2. The results are consistent with previous results from BABAR and BESIII, but with better precision and with narrower ΛΛ¯ invariant mass intervals than BABAR.1 MoreReceived 15 March 2023Accepted 23 March 2023DOI:https://doi.org/10.1103/PhysRevD.107.072005Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasForm factorsParticle interactionsQuantum chromodynamicsPhysical SystemsBaryonsStrange quarkTechniquesLepton collidersMonte Carlo methodsParticle productionParticles & Fields

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