Observation of Structures in the Processes e+e- ???c1 and ??c2
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
American Physical Society
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
We present measurements of the Born cross sections for the processes e+e-???c1 and ??c2 at center-of-mass energies s from 4.308 to 4.951 GeV. The measurements are performed with data samples corresponding to an integrated luminosity of 11.0 fb-1 collected with the BESIII detector operating at the Beijing Electron Positron Collider storage ring. Assuming the e+e-???c2 signals come from a single resonance, the mass and width are determined to be M=(4413.6±9.0±0.8) MeV/c2 and ?=(110.5±15.0±2.9) MeV, respectively, which is consistent with the parameters of the well-established resonance ?(4415). In addition, we also use one single resonance to describe the e+e-???c1 line shape and determine the mass and width to be M=(4544.2±18.7±1.7) MeV/c2 and ?=(116.1±33.5±1.7) MeV, respectively. The structure of this line shape, observed for the first time, requires further understanding. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"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.
Açıklama
Anahtar Kelimeler
Storage Rings, Beijing Electron Positron Collider, Center-Of-Mass Energies, Centre-Of-Mass Energies, Data Sample, Integrated Luminosity, Lines Shapes, Measurements Of, Single Resonance, Digital Storage, Article, Controlled Study, Diagnosis, Luminance
Kaynak
Physical Review Letters
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
132
Sayı
16
