Open Access
Measurement of the Absolute Branching Fraction forΛ c + → Λ e + ν e
M. ABLIKIM
,
M. N. ACHASOV
,
X. C. Ai
,
O. Albayrak
,
M Albrecht
,
M. Albrecht
,
D. J. Ambrose
,
A. Amoroso
,
F. F. An
,
Q. An
,
J. Z. BAI
,
R. Baldini Ferroli
,
Y. BAN
,
D. W. Bennett
,
J V Bennett
,
M. Bertani
,
D. Bettoni
,
J. M. Bian
,
F Bianchi
,
E. Boger
,
I. Boyko
,
R. A. Briere
,
H. Cai
,
X Cai
,
O. Cakir
,
A. Calcaterra
,
G. F. Cao
,
S. A. Cetin
,
J. F. Chang
,
G. Chelkov
,
G. Chen
,
H. S. Chen
,
H. ‐y. Chen
,
J. C. Chen
,
M L Chen
,
S J Chen
,
X. Chen
,
X. R. Chen
,
Y.-B. Chen
,
H.-P. Cheng
,
X. K. Chu
,
G. Cibinetto
,
H. L. Dai
,
J. P. Dai
,
A. Dbeyssi
,
D. Dedovich
,
Z. Y. DENG
,
A. DENIG
,
I. Denysenko
,
M. Destefanis
,
F. De Mori
,
Y. Ding
,
C. Dong
,
J. Dong
,
L. Y. Dong
,
M. Y. Dong
,
Z.L. Dou
,
S. X. DU
,
P. F. Duan
,
J. Z. Fan
,
J. Fang
,
S. S. Fang
,
X. Fang
,
Y. Fang
,
L. Fava
,
O. Fedorov
,
F. Feldbauer
,
G. Felici
,
C. Q. Feng
,
E. Fioravanti
,
M. FRITSCH
,
C. D. FU
,
Q. Gao
,
X.-L. Gao
,
X. Y. Gao
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Y. Gao
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Z. Gao
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I. Garzia
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K. Goetzen
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W. X. Gong
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W. Gradl
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M. GRECO
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M. H. Gu
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Y. T. Gu
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Y.H. Guan
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A. Q. Guo
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L. B. GUO
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Y. Guo
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Y. P. Guo
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Z. Haddadi
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A. Hafner
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S Han
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X. Q. Hao
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F. A. HARRIS
,
K. L. HE
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T. Held
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Y. K. HENG
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Z. L. Hou
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C Hu
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H. M. HU
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J. F. Hu
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G. M. Huang
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G. S. HUANG
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J.‐S. Huang
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Y Huang
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L W Jiang
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J. B. JIAO
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Z Jiao
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D. P. JIN
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S. Jin
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T. Johansson
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A. Julin
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N. KALANTAR-NAYESTANAKI
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X. L. Kang
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X. S. Kang
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M. Kavatsyuk
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B. C. Ke
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P. Kiese
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R. Kliemt
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B. Kloss
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O. B. Kolcu
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B. Kopf
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M. Kornicer
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W. Kuehn
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A. Kupsc
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J. S. LANGE
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M. Lara
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P. Larin
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C. Leng
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C. Li
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Cheng Li
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D. M. Li
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F. Li
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F. Y. Li
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G. Li
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H. B. Li
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J.-C. Li
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Jin Li
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K Li
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Lei Li
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P. R. Li
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T Li
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T. Li
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W. D. LI
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W. G. LI
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X. L. Li
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X. M. Li
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X. N. LI
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X. Q. Li
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H. Liang
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Y. F. Liang
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Y T Liang
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G. R. Liao
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D. X. Lin
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B. J. LIU
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C. X. LIU
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D. Liu
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F. H. Liu
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Fang Liu
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Fang Liu
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Feng Liu
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H. B. LIU
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H. H. Liu
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H. M. LIU
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J Liu
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J Liu
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J. B. LIU
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J.-P. LIU
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J. Y. Liu
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K. Liu
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K. Y. Liu
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L. D. Liu
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P. L. Liu
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Q. Liu
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S. B. Liu
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Z. A. LIU
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Zhiqing Liu
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X. C. Lou
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H. J. Lu
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J. G. Lu
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Y Lü
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Y. Lu
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Y.-p. Lu
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C. L. LUO
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M. X. Luo
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T. Luo
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X.‐L. Luo
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X. R. Lyu
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F. C. MA
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H. L. MA
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L L Ma
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Q. M. MA
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T. Ma
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X. N. Ma
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X. Y. Ma
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F. E. Maas
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J. G. MESSCHENDORP
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J. Min
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R E Mitchell
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X. H. Mo
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Y. J. Mo
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C. Morales Morales
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N. Yu. MUCHNOI
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H. Muramatsu
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Y. Nefedov
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I. B. NIKOLAEV
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Q. Ouyang
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Y Pan
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M. Ripka
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X. D. RUAN
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V. Santoro
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S. SCHUMANN
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W. Shan
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C. P. Shen
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P. X. Shen
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X. Y. SHEN
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H. Y. SHENG
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W. M. Song
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S. Sosio
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G. X. Sun
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J. F. SUN
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Z. T. Sun
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C. J. Tang
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I. Tapan
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E.H. Thorndike
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M. Tiemens
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M. Ullrich
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I. Uman
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G. S. Varner
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B. Wang
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B. L. Wang
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D. Wang
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D. Y. Wang
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K. Wang
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L. L. WANG
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L. S. Wang
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M Wang
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Z Wang
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Z G Wang
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T. Weber
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D. H. Wei
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M. WOLKE
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L.H. Wu
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Z. Wu
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L. Xia
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D. H. ZHANG
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H. H. ZHANG
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H. Y. Zhang
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J. J. Zhang
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J. L. Zhang
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J. Q. Zhang
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J. W. Zhang
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J Y Zhang
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J. Z. Zhang
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K. Zhang
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L. Zhang
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X. Y. Zhang
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Y Zhang
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Y. Zhang
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Y. H. Zhang
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Y. N. Zhang
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Y. T. Zhang
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Yu Zhang
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Z. H. Zhang
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Z. P. Zhang
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Z. Y. Zhang
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G. Zhao
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J. W. ZHAO
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J. Y. Zhao
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J. Z. Zhao
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Lei Zhao
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Ling Zhao
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M. G. ZHAO
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Q. Zhao
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Q.W. Zhao
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S.J. Zhao
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T. C. Zhao
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Y. B. Zhao
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Z. G. ZHAO
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B. Zheng
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J. P. Zheng
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W. J. Zheng
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Y. H. Zheng
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B. ZHONG
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L. Zhou
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X. Zhou
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X. K. Zhou
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X.-R. ZHOU
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X. Y. Zhou
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K. Zhu
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K. J. Zhu
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S Zhu
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S.-H. Zhu
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X L Zhu
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Y. C. Zhu
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Y. S. Zhu
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Z. A. ZHU
,
J. Zhuang
,
L. Zotti
,
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,
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Publication type: Journal Article
Publication date: 2015-11-25
scimago Q1
wos Q1
SJR: 2.856
CiteScore: 15.6
Impact factor: 9.0
ISSN: 00319007, 10797114
PubMed ID:
26650293
General Physics and Astronomy
Abstract
We report the first absolute measurement of the branching fraction of $\Lambda^+_{c}\rightarrow \Lambda e^+\nu_e$. This measurement is based on 567 pb$^{-1}$ of $e^+e^-$ annihilation data produced at $\sqrt{s}=4.599$ GeV, which is just above the $\Lambda^+_c\bar{\Lambda}^-_c$ threshold. The data were collected with the BESIII detector at the BEPCII storage rings. The branching fraction is determined to be $\mathcal B({\Lambda^+_c\rightarrow \Lambda e^+\nu_e})=(3.63\pm0.38({\rm stat})\pm0.20({\rm syst}))\%$, representing a more than twofold improvement in precision upon previously published results. As the branching fraction for $\Lambda^+_{c}\rightarrow \Lambda e^+\nu_e$ is the benchmark for those of other $\Lambda^+_c$ semileptonic channels, our result provides a unique test of different theoretical models, which is the most stringent to date.
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ABLIKIM M. et al. Measurement of the Absolute Branching Fraction forΛc+→Λe+νe // Physical Review Letters. 2015. Vol. 115. No. 22. 221805
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ABLIKIM M. et al. Measurement of the Absolute Branching Fraction forΛc+→Λe+νe // Physical Review Letters. 2015. Vol. 115. No. 22. 221805
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@article{2015_ABLIKIM,
author = {M. ABLIKIM and M. N. ACHASOV and X. C. Ai and O. Albayrak and M Albrecht and M. Albrecht and D. J. Ambrose and A. Amoroso and F. F. An and Q. An and J. Z. BAI and R. Baldini Ferroli and Y. BAN and D. W. Bennett and J V Bennett and M. Bertani and D. Bettoni and J. M. Bian and F Bianchi and E. Boger and I. Boyko and R. A. Briere and H. Cai and X Cai and O. Cakir and A. Calcaterra and G. F. Cao and S. A. Cetin and J. F. Chang and G. Chelkov and G. Chen and H. S. Chen and H. ‐y. Chen and J. C. Chen and M L Chen and S J Chen and X. Chen and X. R. Chen and Y.-B. Chen and H.-P. Cheng and X. K. Chu and G. Cibinetto and H. L. Dai and J. P. Dai and A. Dbeyssi and D. Dedovich and Z. Y. DENG and A. DENIG and I. Denysenko and M. Destefanis and others},
title = {Measurement of the Absolute Branching Fraction forΛc+→Λe+νe},
journal = {Physical Review Letters},
year = {2015},
volume = {115},
publisher = {American Physical Society (APS)},
month = {nov},
url = {https://doi.org/10.1103/PhysRevLett.115.221805},
number = {22},
pages = {221805},
doi = {10.1103/PhysRevLett.115.221805}
}
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