TY  - SER
AU  - Achasov,M.N.
AU  - Ahmed,S.
AU  - Chelkov,G.A.
AU  - Ablikim,M.
TI  - Measurement of the absolute branching fraction for Λc + → Λμ+νμ
KW  - BESIII, детектор
KW  - BEPCII, коллайдер
KW  - лептоны
KW  - статьи в журналах
N1  - Библиогр.: 26 назв
N2  - We report the first measurement of the absolute branching fraction for View the MathML sourceΛc+→Λμ+νμ. This measurement is based on a sample of e+e−e+e− annihilation data produced at a center-of-mass energy View the MathML sources=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1567 pb−1. The branching fraction is determined to be View the MathML sourceB(Λc+→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio View the MathML sourceB(Λc+→Λμ+νμ)/B(Λc+→Λe+νe) to be 0.96±0.16(stat)±0.04(syst)0.96±0.16(stat)±0.04(syst)
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000581788
ER  -