Lattice QCD calculation of form factors describing the rare decays B → K[superscript *]ℓ[superscript +]ℓ[superscript -] and B[subscript s] → φℓ[superscript +]ℓ[superscript -]
The rare decays B[superscript 0] → K[superscript *0]μ[superscript +]μ[superscript −] and B[subscript s] → ϕμ[superscript +]μ[superscript −] are now being observed with enough precision to test Standard Model predictions. A full understanding of these decays requires accurate determinations of the co...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88621 |
| Summary: | The rare decays B[superscript 0] → K[superscript *0]μ[superscript +]μ[superscript −] and B[subscript s] → ϕμ[superscript +]μ[superscript −] are now being observed with enough precision to test Standard Model predictions. A full understanding of these decays requires accurate determinations of the corresponding hadronic form factors. Here we present results of lattice QCD calculations of the B → K[superscript *] and B[subscript s] → ϕ form factors. We also determine the form factors relevant for the decays B[subscript s] → K[superscript *]ℓν and B[subscript s] → [bar over K][superscript *0]ℓ[superscript +]ℓ[superscript −]. We use full-QCD configurations including 2+1 flavors of sea quarks using an improved staggered action, and we employ lattice nonrelativistic QCD to describe the bottom quark. |
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