Possibility of large lifetime differences in neutral B meson systems

Dighe, Amol ; Kundu, Anirban ; Nandi, Soumitra (2007) Possibility of large lifetime differences in neutral B meson systems Physical Review D, 76 (5). Article ID 054005. ISSN 1550-7998

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Official URL: http://journals.aps.org/prd/abstract/10.1103/PhysR...

Related URL: http://dx.doi.org/10.1103/PhysRevD.76.054005


We investigate new physics models that can increase the lifetime differences in the Bq−B̅q systems (q=d, s) above their standard model values. If both Bq as well as B̅q can decay to a final state through flavor dependent new physics interactions, the so-called Grossman bound may be evaded. As examples, we consider the scalar leptoquark model and λ''-type R-parity violating supersymmetry. We find that models with a scalar leptoquark can enhance ΔΓss all the way up to its experimental upper bound and ΔΓ dd to as much as ~2.5%, at the same time allowing the CP violating phase βs to vary between −45° and 20°. R-parity violating supersymmetry models cannot enhance the lifetime differences significantly, but can enhance the value of βs up to ~±20°. This may bring the values of ΔΓqq as well as βs within the measurement capabilities of B factories and the B physics experiment at the Large Hadron Collider (LHCb). We also obtain bounds on combinations of these new physics couplings, and predict enhanced branching ratios of Bs/d→τ+τ .

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:101432
Deposited On:09 Mar 2018 10:24
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