Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis
Abstract We analyze data on $$B\rightarrow K\mu ^+\mu ^-$$ B → K μ + μ - and $$B\rightarrow K^*\mu ^+\mu ^-$$ B → K ∗ μ + μ - decays in the whole dilepton invariant mass spectrum with the aim of disentangling short- vs. long-distance contributions. The sizable long-distance amplitudes from $$c \over...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-12869-5 |
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| author | Marzia Bordone Gino Isidori Sandro Mächler Arianna Tinari |
| author_facet | Marzia Bordone Gino Isidori Sandro Mächler Arianna Tinari |
| author_sort | Marzia Bordone |
| collection | DOAJ |
| description | Abstract We analyze data on $$B\rightarrow K\mu ^+\mu ^-$$ B → K μ + μ - and $$B\rightarrow K^*\mu ^+\mu ^-$$ B → K ∗ μ + μ - decays in the whole dilepton invariant mass spectrum with the aim of disentangling short- vs. long-distance contributions. The sizable long-distance amplitudes from $$c \overline{c}$$ c c ¯ narrow resonances are taken into account by employing a dispersive approach. For each available $$q^2=m^2_{\mu \mu }$$ q 2 = m μ μ 2 bin and each helicity amplitude an independent determination of the Wilson coefficient $$C_9$$ C 9 , describing $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - transitions at short distances, is obtained. The consistency of the $$C_9$$ C 9 values thus obtained provides an a posteriori check of the absence of additional, sizable, long-distance contributions. The systematic difference of these values from the Standard Model expectation supports the hypothesis of a non-standard $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - amplitude of short-distance origin. |
| format | Article |
| id | doaj-art-7379decfb14e43cfa01c176e237ffe97 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-7379decfb14e43cfa01c176e237ffe972024-11-10T12:40:21ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-05-0184511310.1140/epjc/s10052-024-12869-5Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysisMarzia Bordone0Gino Isidori1Sandro Mächler2Arianna Tinari3Theoretical Physics Department, CERNPhysik-Institut, Universität ZürichPhysik-Institut, Universität ZürichPhysik-Institut, Universität ZürichAbstract We analyze data on $$B\rightarrow K\mu ^+\mu ^-$$ B → K μ + μ - and $$B\rightarrow K^*\mu ^+\mu ^-$$ B → K ∗ μ + μ - decays in the whole dilepton invariant mass spectrum with the aim of disentangling short- vs. long-distance contributions. The sizable long-distance amplitudes from $$c \overline{c}$$ c c ¯ narrow resonances are taken into account by employing a dispersive approach. For each available $$q^2=m^2_{\mu \mu }$$ q 2 = m μ μ 2 bin and each helicity amplitude an independent determination of the Wilson coefficient $$C_9$$ C 9 , describing $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - transitions at short distances, is obtained. The consistency of the $$C_9$$ C 9 values thus obtained provides an a posteriori check of the absence of additional, sizable, long-distance contributions. The systematic difference of these values from the Standard Model expectation supports the hypothesis of a non-standard $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ - amplitude of short-distance origin.https://doi.org/10.1140/epjc/s10052-024-12869-5 |
| spellingShingle | Marzia Bordone Gino Isidori Sandro Mächler Arianna Tinari Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis European Physical Journal C: Particles and Fields |
| title | Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis |
| title_full | Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis |
| title_fullStr | Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis |
| title_full_unstemmed | Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis |
| title_short | Short- vs. long-distance physics in $$B\rightarrow K^{(*)} \ell ^+\ell ^-$$ B → K ( ∗ ) ℓ + ℓ - : a data-driven analysis |
| title_sort | short vs long distance physics in b rightarrow k ell ell b k ∗ l l a data driven analysis |
| url | https://doi.org/10.1140/epjc/s10052-024-12869-5 |
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