Exclusive rare decays of heavy baryons to light baryons:Λb→ΛγandΛb→Λl+l−

Autor:	Chao-Shang Huang, Hua-Gang Yan
Rok vydání:	1999
Předmět:	Baryon Physics Nuclear and High Energy Physics QCD sum rules Particle physics Hadron Energy spectrum Heavy quark effective theory High Energy Physics::Experiment Atomic physics Lambda
Zdroj:	Physical Review D. 59
ISSN:	1089-4918 0556-2821
DOI:	10.1103/physrevd.59.114022
Popis:	Rare decays $\Lambda_b \to \Lambda \gamma$ and $\Lambda_b \to \Lambda l^{+} l^{-}$ (l= e, $\mu$) are examined. We use QCD sum rules to calculate the hadronic matrix elements governing the decays. The $\Lambda$ polarization in the decays is analyzed and it is shown that the polarization parameter in $\Lambda_b \to \Lambda \gamma$ does not depends on the values of hadronic form factors. And the energy spectrum of $\Lambda$ in $\Lambda_b \to \Lambda l^{+} l^{-}$ is given.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7c563c0417987aae6ebbb0f991aa332d https://doi.org/10.1103/physrevd.59.114022 Zobrazit plný text záznamu