SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays

We employ the flavor SU(3) symmetry to analyze semileptonic decays of anti-triplet charmed baryons (Λc+,Ξc+,0) and find that the experimental data on B(Λc→Λℓ+νℓ) implies B(Ξc0→Ξ−e+νe)=(4.10±0.46)% and B(Ξc0→Ξ−μ+νμ)=(3.98±0.57)%. When this prediction is confronted with recent experimental results fro...

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Autores principales:	Xiao-Gang He, Fei Huang, Wei Wang, Zhi-Peng Xing
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/bd1149e7e84e4ac9b3c0c4e0c308f983
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spelling	oai:doaj.org-article:bd1149e7e84e4ac9b3c0c4e0c308f9832021-12-04T04:32:39ZSU(3) symmetry and its breaking effects in semileptonic heavy baryon decays0370-269310.1016/j.physletb.2021.136765https://doaj.org/article/bd1149e7e84e4ac9b3c0c4e0c308f9832021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S037026932100705Xhttps://doaj.org/toc/0370-2693We employ the flavor SU(3) symmetry to analyze semileptonic decays of anti-triplet charmed baryons (Λc+,Ξc+,0) and find that the experimental data on B(Λc→Λℓ+νℓ) implies B(Ξc0→Ξ−e+νe)=(4.10±0.46)% and B(Ξc0→Ξ−μ+νμ)=(3.98±0.57)%. When this prediction is confronted with recent experimental results from Belle collaboration B(Ξc0→Ξ−e+νe)=(1.31±0.04±0.07±0.38)% and B(Ξc0→Ξ−μ+νμ)=(1.27±0.06±0.10±0.37)%, it is found that the SU(3) symmetry is severely broken. We then consider the generic SU(3) breaking effects both in decay amplitudes and the mixing effect between the anti-triplet and sextet charmed baryons. We find that the pertinent data can be accommodated in different scenarios but the breaking effects are inevitably large. In some interesting scenarios, we also explore the testable implications in these scenarios which can be stringently tested with more data become available. Similar analyses are carried out for the semileptonic decays of anti-triplet beauty baryons to octet baryons and anti-triplet charmed baryons. The validity of SU(3) for these decays can also be examined when data become available.Xiao-Gang HeFei HuangWei WangZhi-Peng XingElsevierarticlePhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136765- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Xiao-Gang He Fei Huang Wei Wang Zhi-Peng Xing SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays
description	We employ the flavor SU(3) symmetry to analyze semileptonic decays of anti-triplet charmed baryons (Λc+,Ξc+,0) and find that the experimental data on B(Λc→Λℓ+νℓ) implies B(Ξc0→Ξ−e+νe)=(4.10±0.46)% and B(Ξc0→Ξ−μ+νμ)=(3.98±0.57)%. When this prediction is confronted with recent experimental results from Belle collaboration B(Ξc0→Ξ−e+νe)=(1.31±0.04±0.07±0.38)% and B(Ξc0→Ξ−μ+νμ)=(1.27±0.06±0.10±0.37)%, it is found that the SU(3) symmetry is severely broken. We then consider the generic SU(3) breaking effects both in decay amplitudes and the mixing effect between the anti-triplet and sextet charmed baryons. We find that the pertinent data can be accommodated in different scenarios but the breaking effects are inevitably large. In some interesting scenarios, we also explore the testable implications in these scenarios which can be stringently tested with more data become available. Similar analyses are carried out for the semileptonic decays of anti-triplet beauty baryons to octet baryons and anti-triplet charmed baryons. The validity of SU(3) for these decays can also be examined when data become available.
format	article
author	Xiao-Gang He Fei Huang Wei Wang Zhi-Peng Xing
author_facet	Xiao-Gang He Fei Huang Wei Wang Zhi-Peng Xing
author_sort	Xiao-Gang He
title	SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays
title_short	SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays
title_full	SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays
title_fullStr	SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays
title_full_unstemmed	SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays
title_sort	su(3) symmetry and its breaking effects in semileptonic heavy baryon decays
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/bd1149e7e84e4ac9b3c0c4e0c308f983
work_keys_str_mv	AT xiaoganghe su3symmetryanditsbreakingeffectsinsemileptonicheavybaryondecays AT feihuang su3symmetryanditsbreakingeffectsinsemileptonicheavybaryondecays AT weiwang su3symmetryanditsbreakingeffectsinsemileptonicheavybaryondecays AT zhipengxing su3symmetryanditsbreakingeffectsinsemileptonicheavybaryondecays
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SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays

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