By analyzing 4.5 fb(-1) of e(+)e(-) collision data accumulated with the BESIII detector at center-of-mass energies ranging from 4599.53 MeV to 4698.82 MeV, we report the measurement of the absolute branching fraction (BF) of the inclusive decay Lambda(+)(c)->(KSX)-X-0 using the double-tag technique. The result is B(Lambda(+)(c)->(KSX)-X-0 = (10.9 +/- 0.2 +/- 0.1)%, where the first uncertainty is statistical and the second is systematic. This result indicates that there are still undiscovered decay channels containing K-S(0) in the final state with a combined BF of (3.0 +/- 0.4)%. The BF of the inclusive decay Lambda c+->(K) over bar (0)/(KX)-X-0 is calculated to be B (Lambda(+)(c)->(K) over bar (0)/(KX)-X-0 = (21.8 +/- 0.4 +/- 0.2)%, The result is in agreement with the prediction of the statistical isospin model.
Improved measurement of absolute branching fraction of the inclusive decay Λc+ → KS0X
A. Amoroso;F. Bianchi;A. Bortone;M. Destefanis;F. De Mori;M. Greco;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2025-01-01
Abstract
By analyzing 4.5 fb(-1) of e(+)e(-) collision data accumulated with the BESIII detector at center-of-mass energies ranging from 4599.53 MeV to 4698.82 MeV, we report the measurement of the absolute branching fraction (BF) of the inclusive decay Lambda(+)(c)->(KSX)-X-0 using the double-tag technique. The result is B(Lambda(+)(c)->(KSX)-X-0 = (10.9 +/- 0.2 +/- 0.1)%, where the first uncertainty is statistical and the second is systematic. This result indicates that there are still undiscovered decay channels containing K-S(0) in the final state with a combined BF of (3.0 +/- 0.4)%. The BF of the inclusive decay Lambda c+->(K) over bar (0)/(KX)-X-0 is calculated to be B (Lambda(+)(c)->(K) over bar (0)/(KX)-X-0 = (21.8 +/- 0.4 +/- 0.2)%, The result is in agreement with the prediction of the statistical isospin model.| File | Dimensione | Formato | |
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JHEP06(2025)194.pdf
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