Effects of non-minimal Universal Extra Dimension on $B\rightarrow X_s\gamma$

Anindya Datta (University of Calcutta); Avirup Shaw (Indian Association for the Cultivation of Science)

Effects of non-minimal Universal Extra Dimension on Brightarrow X_sγ

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arxiv 1610.09924 v2 pith:4V3WBFVX submitted 2016-10-31 hep-ph

Effects of non-minimal Universal Extra Dimension on Brightarrow X_sγ

Anindya Datta (University of Calcutta) , Avirup Shaw (Indian Association for the Cultivation of Science) This is my paper

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keywords extraboundarydimensionallocalisedtermsuniversalbranchingcoefficients

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We estimate contributions from Kaluza-Klein excitations of third generation quarks and gauge bosons to the branching ratio of $B\rightarrow X_s\gamma$ decay process in 5-Dimensional Universal Extra Dimensional scenario with non-vanishing boundary localised terms. This model is conventionally known as non-minimal Universal Extra Dimensional model. We have derived the lower limit on the size of the extra dimension by comparing our theoretical estimation of the branching ratio which includes next-to-next-to leading order QCD corrections with its experimentally measured value. Coefficients of the boundary localised terms have also been constrained. 95 \% C.L. lower limit on inverse of radius of compactification ($R^{-1}$) can be as large as 670 GeV for some choice of the value of coefficients of boundary localised terms.

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Belle II Constraints on the Non-Minimal Universal Extra Dimensional Model
hep-ph 2025-09 unverdicted novelty 5.0

Belle II data on the rare B decay constrains the non-minimal UED model to require the inverse compactification radius to be at least ~900 GeV, while the minimal version yields no bound.