Double-lepton polarization asymmetries in Lambda(b)->Lambda l(+)l(-) decay

Date

2004-12-01

Author

Alıyev, Tahmasıb
Savcı, Mustafa

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Double-lepton polarization asymmetries in Lambda(b) --> Lambdal(+)l(-) decay are calculated using a general, model independent form of the effective Hamiltonian. The sensitivities of these asymmetries to the new Wilson coefficients are studied in detail. Furthermore, the correlations between averaged double-lepton polarization asymmetry and branching ratio are analyzed. It is shown that there exist certain regions of the new Wilson coefficients where new physics can be established by measuring the double-lepton polarization asymmetries only.

Subject Keywords

Physics and Astronomy (miscellaneous), Engineering (miscellaneous)

URI

https://hdl.handle.net/11511/39285

Journal

EUROPEAN PHYSICAL JOURNAL C

DOI

https://doi.org/10.1140/epjc/s2004-02045-6

Collections

Department of Physics, Article

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Model independent analysis of Lambda baryon polarizations in Lambda(b)->Lambda l(+)l(-) decay Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (American Physical Society (APS), 2003-02-01) We present a model independent analysis of Lambda baryon polarizations in the Lambda(b)-->Lambdal(+)l(-) decay. The sensitivity of the averaged Lambda polarizations to the new Wilson coefficients is studied. It is observed that there exist certain regions of the new Wilson coefficients where the branching ratio coincides with the standard model prediction, while the Lambda baryon polarizations deviate from the standard model results remarkably.
Double-lepton polarization asymmetries in the B -> Kl(+)l(-) decay beyond the standard model Alıyev, Tahmasıb; Savcı, Mustafa (Springer Science and Business Media LLC, 2004-06-01) General expressions for the double-lepton polarizations in the B --> Kl(+)l(-)decay are obtained, using a model independent effective Hamiltonian, including all possible interactions. Correlations between the averaged double-lepton polarization asymmetries and the branching ratio, as well as the averaged single-lepton polarization asymmetry are studied. It is observed that a study of the double-lepton polarization asymmetries can serve as a good test for establishing new physics beyond the standard model.
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Citation Formats

T. Alıyev and M. Savcı, “Double-lepton polarization asymmetries in Lambda(b)->Lambda l(+)l(-) decay,” EUROPEAN PHYSICAL JOURNAL C, pp. 283–295, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39285.