New physics upper bound on the branching ratio of Bs→l+l−
DSpace at IIT Bombay
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Title |
New physics upper bound on the branching ratio of Bs→l+l−
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Creator |
ALOK, ASHUTOSH KUMAR
UMA SANKAR, S |
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Subject |
neutral currents
standard model flavour model semileptonic decays |
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Description |
We consider the most general new physics effective Lagrangian for b→sl+l−. We derive the upper limit on the branching ratio for the processes Bs→l+l− where l=e,μ, subject to the current experimental bounds on related processes, B→Kl+l− and B→K*l+l−. If the new physics interactions are of vector/axial-vector form, the present measured rates for B→(K,K*)l+l− constrain B(Bs→l+l−) to be of the same order of magnitude as their respective Standard Model predictions. On the other hand, if the new physics interactions are of scalar/pseudoscalar form, B→(K,K*)l+l− rates do not impose any constraint on Bs→l+l− and the branching ratios of these decays can be as large as present experimental upper bounds. If future experiments measure B(Bs→l+l−) to be greater-or-equal, slanted10−8 then the new physics giving rise to these decays has to be of the scalar/pseudoscalar form.
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Publisher |
Elsevier
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Date |
2009-04-08T06:49:02Z
2011-11-25T20:50:33Z 2011-12-26T13:08:22Z 2011-12-27T05:56:22Z 2009-04-08T06:49:02Z 2011-11-25T20:50:33Z 2011-12-26T13:08:22Z 2011-12-27T05:56:22Z 2005 |
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Type |
Article
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Identifier |
Physics Letters B 620(1-2), 61-68
0370-2693 http://dx.doi.org/10.1016/j.physletb.2005.06.005 http://hdl.handle.net/10054/1155 http://dspace.library.iitb.ac.in/xmlui/handle/10054/1155 |
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Language |
en
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