Search for the Decay $B_s^0 \rightarrow \eta^\prime \eta$ - INSPIRE

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Search for the Decay $B_s^0 \rightarrow \eta^\prime \eta$

Belle

Collaboration

Sep 13, 2020

15 pages

e-Print:

2009.06052 [hep-ex]

Experiments:

KEK-BF-BELLE

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Abstract: (arXiv)

In the Standard Model (SM) charmless hadronic decays

B_s^0 \rightarrow \eta^\prime \eta

proceed via tree-level

b\to u

and penguin

b\to s

transitions. Penguin transitions are sensitive to Beyond-the-Standard-Model (BSM) physics scenarios and could affect the branching fractions and {\it CP} asymmetries in such decays. Once branching fractions for two-body decays

B_s \to \eta\eta, \eta\eta^{\prime}, \eta^{\prime}\eta^{\prime}

are measured, and the theoretical uncertainties are reduced, it would be possible to extract {\it CP} violating parameters from the data using the formalism based on SU(3)/U(3) symmetry. To achieve this goal, at least four of these six branching fractions need to be measured. Only the branching fraction for

B_s^0 \to \eta^{\prime}\eta^{\prime}

has been measured so far.

electron positron: annihilation
electron positron: colliding beams
B/s0: hadronic decay
CP: violation
eta
eta(958)
symmetry: U(3)
B/s0: branching ratio: measured
penguin
tree approximation

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