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New physics effects in Lambda(b)->Lambda l(+)l(-) decay with lepton polarizations
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Date
2002-06-01
Author
Alıyev, Tahmasıb
Özpineci, Altuğ
Savcı, Mustafa
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We study lepton polarization asymmetries in the Lambda(b)-->Lambdal(+)l(-) decay using the most general model independent effective Hamiltonian. The dependence of the lepton polarizations and their combinations on the new Wilson coefficients are studied in detail. It is observed that there is a region for the new Wilson coefficients for which the branching ratio coincides with the standard model prediction, while lepton polarizations show considerable departure from the standard model.
Subject Keywords
RARE B->K-ASTERISK-L(+)L(-) DECAY
,
Higgs doublet model
,
Standard model
,
B->X(S)TAU(+)TAU(-)
,
Asymmetries
,
Baryons
URI
https://hdl.handle.net/11511/35699
Journal
PHYSICAL REVIEW D
DOI
https://doi.org/10.1103/physrevd.65.115002
Collections
Department of Physics, Article
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This study investigates the influence of the fourth generation quarks on the total branching ratio and the single lepton polarizations in Lambda(b) -> Lambda l(+)l(-) decay. Taking vertical bar Vt ' sVt ' b vertical bar similar to {0.01-0.03} with phase just below 90 degrees, which is consistent with the b -> sl(+)l(-) rate and the B-s mixing parameter Delta(mBs), we obtain that the total branching ratio and the single lepton (mu,tau) polarizations are quite sensitive to the existence of fourth generation. ...
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T. Alıyev, A. Özpineci, and M. Savcı, “New physics effects in Lambda(b)->Lambda l(+)l(-) decay with lepton polarizations,”
PHYSICAL REVIEW D
, pp. 0–0, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35699.