Details

Autor(en) / Beteiligte

• Achasov, M. N.
• Ahmed, S.
• Amoroso, A.
• Bai, J. Z.
• Bennett, D. W.
• Bennett, J. V.
• Cai, X.
• Calcaterra, A.
• Chai, J.
• Chen, P. L.
• Cibinetto, G.
• Dai, H. L.
• Dbeyssi, A.
• Ding, Y.
• Dou, Z. L.
• Fang, Y.
• Farinelli, R.
• Felici, G.
• Gao, Z.
• Greco, M.
• Gu, M. H.
• Harris, F. A.
• He, X. Q.
• Heng, Y. K.
• Hou, Z. L.
• Huang, G. S.
• Huang, X. T.
• Huang, X. Z.
• Ji, Q. P.
• Ji, X. B.
• Jiao, J. B.
• Jin, D. P.
• Kuemmel, M.
• Kuhlmann, M.
• Lange, J. S.
• Larin, P.
• Li, H. J.
• Li, J. W.
• Li, Ke
• Li, X. Q.
• Li, Z. B.
• Liang, H.
• Libby, J.
• Liu, H. M.
• Liu, Huanhuan
• Liu, Huihui
• Liu, J. Y.
• Liu, L. D.
• Liu, X.
• Liu, Y. B.
• Luo, M. X.
• Ma, Q. M.
• Messchendorp, J. G.
• Mo, X. H.
• Morales Morales, C.
• Muchnoi, N. Yu
• Ouyang, Q.
• Peng, H. P.
• Ping, J. L.
• Poling, R.
• Redmer, C. F.
• Rolo, M.
• Rong, G.
• Shi, X.
• Sun, G. X.
• Sun, X. H.
• Tang, G. Y.
• Tapan, I.
• Wang, D.
• Wang, Dan
• Wang, K.
• Wang, W. P.
• Wang, X. F.
• Wang, Y.
• Wang, Z.
• Wen, S. P.
• Xia, L.
• Xiao, Y. J.
• Xu, Q. J.
• Yang, Y. H.
• Yang, Yifan
• Yu, B. X.
• Yu, C. X.
• Zeng, Z.
• Zhang, C. C.
• Zhang, H. H.
• Zhang, J. Z.
• Zhang, L.
• Zhang, Yang
• Zhang, Yao
• Zhang, Yu
• Zhao, Ling
• Zhao, Q.
• Zhemchugov, A.
• Zhong, B.
• Zhou, Q.
• Zhu, J.
• Zhu, K. J.
• Zhu, S. H.
• Zhu, Y. S.

Titel

Precision Measurement of the e + e − → Λ c + Λ ¯ c − Cross Section Near Threshold

Ist Teil von

• Physical review letters, 2018-03, Vol.120 (13), p.1, Article 132001

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The cross section of the e+e−→Λc+Λ¯c− process is measured with unprecedented precision using data collected with the BESIII detector at /¯s=4574.5, 4580.0, 4590.0 and 4599.5 MeV. The nonzero cross section near the Λc+Λ¯c− production threshold is cleared. At center-of-mass energies /¯s=4574.5 and 4599.5 MeV, the higher statistics data enable us to measure the Λc polar angle distributions. From these, the Λc electric over magnetic form-factor ratios (|GE/GM|) are measured for the first time. They are found to be 1.14±0.14±0.07 and 1.23±0.05±0.03, respectively, where the first uncertainties are statistical and the second are systematic.