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The $b\to s\gamma$ decay in SUSY models with non-universal A-terms
High Energy Physics - Phenomenology · Submitted 30 May 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We show that $b\to s\gamma$ do not severely constrain the non-universality of these models.
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The abstract, sentence by sentence
We analyse the predictions for the inclusive branching ratio for $b\to s\gamma$ decay in a class of string-inspired SUSY models with non-universal soft-breaking A-terms. These models are particularly interesting since the non-universality of the A-terms plays an important role in providing new significant contributions to CP violation effects in kaon physics while respecting the severe bounds on electric dipole moments. We show that $b\to s\gamma$ do not severely constrain the non-universality of these models. In particular, at low $\tan\beta$ $(\tan\beta\simeq 2)$, our predictions are close to the universal case. For large $\tan\beta$ ($\tan\beta \gsim 15$),the effect of non-universality is enhanced and stronger constraints hold. We find that the parameter regions which are important for generating sizeable contribution to $\epsilon'/\epsilon$, of order $2 \times 10^{-3}$, are not excluded.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We analyse the predictions for the inclusive branching ratio for $b\to s\gamma$ decay in a class of string-inspired SUSY models with non-universal soft-breaking A-terms. | contribution 1.00 | 0.93 | 0.06 | asserted 0.69 |
| s1 | These models are particularly interesting since the non-universality of the A-terms plays an important role in providing new significant contributions to CP violation effects in kaon physics while respecting the severe bounds on electric dipole moments. | background 0.95 | 0.12 | 0.05 | asserted 0.96 |
| s2 | We show that $b\to s\gamma$ do not severely constrain the non-universality of these models. | result 0.94 | 0.93 | 0.77 | asserted 1.00 |
| s3 | In particular, at low $\tan\beta$ $(\tan\beta\simeq 2)$, our predictions are close to the universal case. | result 1.00 | 0.93 | 0.07 | asserted 0.99 |
| s4 | For large $\tan\beta$ ($\tan\beta \gsim 15$),the effect of non-universality is enhanced and stronger constraints hold. | result 0.99 | 0.86 | 0.12 | asserted 1.00 |
| s5 | We find that the parameter regions which are important for generating sizeable contribution to $\epsilon'/\epsilon$, of order $2 \times 10^{-3}$, are not excluded. | result 0.92 | 0.96 | 0.20 | asserted 1.00 |
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The paper
Original abstract
We analyse the predictions for the inclusive branching ratio for $b\to s\gamma$ decay in a class of string-inspired SUSY models with non-universal soft-breaking A-terms. These models are particularly interesting since the non-universality of the A-terms plays an important role in providing new significant contributions to CP violation effects in kaon physics while respecting the severe bounds on electric dipole moments. We show that $b\to s\gamma$ do not severely constrain the non-universality of these models. In particular, at low $\tan\beta$ $(\tan\beta\simeq 2)$, our predictions are close to the universal case. For large $\tan\beta$ ($\tan\beta \gsim 15$),the effect of non-universality is enhanced and stronger constraints hold. We find that the parameter regions which are important for generating sizeable contribution to $\epsilon'/\epsilon$, of order $2 \times 10^{-3}$, are not excluded.
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