Back to Search
Start Over
BESIII results on time-like baryon form factors.
- Source :
-
EPJ Web of Conferences . 10/18/2019, Vol. 218, p1-6. 6p. - Publication Year :
- 2019
-
Abstract
- This contribution reports on the recent measurements of baryon electromagnetic form factors at the BESIII experiment in Beijing. The Beijing e+e− collider BEPCII is a double-ring symmetric collider running at s $ \sqrt s $ between 2.0 and 4.6 GeV. Baryon electromagnetic form factors can be measured at BESIII in direct e+e−-annihilation and in initial state radiation processes. Based on the data collected by the BESIII detector at 12 center of mass energies between 2.23 and 3.67 GeV, the measured e + e − → p − p $ \mathop e\nolimits^ + \mathop e\nolimits^ - \to \mathop p\limits^ - p $ cross section and the time-like proton form factor are presented. Preliminary results from the analysis of the initial state radiation process e + e − → p − p γ $ \mathop e\nolimits^ + \mathop e\nolimits^ - \to \mathop p\limits^ - p\gamma $ using a data set of 7.408 fb−1 collected at center of mass energies between 3.773 and 4.6 GeV, are also shown. The cross sections for e + e − → Λ c − − Λ c + m a t h 5 − − − − − e + e − → Λ − Λ $ \mathop e\nolimits^ + \mathop e\nolimits^ - \to \mathop {\mathop \Lambda \nolimits_c^ - }\limits^ - \mathop \Lambda \nolimits_c^ + $ and e + e − → Λ − Λ $ \mathop e\nolimits^ + \mathop e\nolimits^ - \to \mathop \Lambda \limits^ - \Lambda $ are measured near threshold with unprecedented precision. Preliminary results on the first measurement of the ^c form factor ratio |GE|/|GM| are also given. Ongoing analysis based on the high luminosity energy scan from 2015 and from radiative return at different s $ \sqrt s $ are also described. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21016275
- Volume :
- 218
- Database :
- Academic Search Index
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Conference
- Accession number :
- 139291895
- Full Text :
- https://doi.org/10.1051/epjconf/201921804002