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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12925

Title: New physics upper bound on the branching ratio of B-s -> l(+)l(-)gamma
Authors: ALOK, AK
SANKAR, SU
Keywords: decays
qcd
meson
lhcb
Issue Date: 2007
Publisher: WORLD SCIENTIFIC PUBL CO PTE LTD
Citation: MODERN PHYSICS LETTERS A, 22(18), 1319-1328
Abstract: We consider the effect of new physics on the branching ratio of B-s -> l(+)l(-)gamma where l = e, mu. If the new physics is of the form scalar/pseudoscalar, then it makes no contribution to B-s -> l(+)l(-)gamma, unlike in the case of B-s -> l(+)l(-)gamma, where it can potentially make a very large contribution. If the new physics is in the form of vector/axial- vector operators, then the present data on B -> (K,K*)l(+)l(-) does not allow a large enhancement for B(B-s -> l(+)l(-)gamma). If the new physics is in the form of tensor/pseudotensor operators, then the data on B -> (K, K*)l(+)l(-) gives no useful constraint but the data on B -> K*gamma does. Here again, a large enhancement of B(B-s -> l(+)l(-)gamma), much beyond the Standard Model expectation, is not possible. Hence, we conclude that the present data on b -> s transitions allow a large boost in B(B-s -> l(+)l(-)) but not in B(B-s -> l(+)l(-)gamma).
URI: http://dx.doi.org/10.1142/S0217732307021901
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12925
http://hdl.handle.net/10054/12925
ISSN: 0217-7323
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