$$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ +
Abstract We present an up-to-date complete model-independent global fit to $$b\rightarrow s\ell \ell $$ b → s ℓ ℓ observables that confirms patterns of New Physics able to explain the data. We include the recent LHCb measurements of $$R_K$$ R K , $$R_{K_S}$$ R K S , $$R_{K^{*+}}$$ R K ∗ + , $$B_s \r...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-022-10231-1 |
| _version_ | 1818273366203695104 |
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| author | Marcel Algueró Bernat Capdevila Sébastien Descotes-Genon Joaquim Matias Martín Novoa-Brunet |
| author_facet | Marcel Algueró Bernat Capdevila Sébastien Descotes-Genon Joaquim Matias Martín Novoa-Brunet |
| author_sort | Marcel Algueró |
| collection | DOAJ |
| description | Abstract We present an up-to-date complete model-independent global fit to $$b\rightarrow s\ell \ell $$ b → s ℓ ℓ observables that confirms patterns of New Physics able to explain the data. We include the recent LHCb measurements of $$R_K$$ R K , $$R_{K_S}$$ R K S , $$R_{K^{*+}}$$ R K ∗ + , $$B_s \rightarrow \phi \mu ^+\mu ^-$$ B s → ϕ μ + μ - and $$B_s\rightarrow \mu ^+\mu ^-$$ B s → μ + μ - in our analysis, which now includes 254 observables. This updates our previous analyses and strengthens their two main outcomes. First, the presence of right-handed couplings encoded in the Wilson coefficients $${{\mathcal {C}}}_{9'\mu }$$ C 9 ′ μ and $${{\mathcal {C}}}_{10'\mu }$$ C 10 ′ μ remains a viable possibility. Second, a lepton flavour universality violating (LFUV) left-handed lepton coupling ( $${{\mathcal {C}}}_{9\mu }^{\mathrm{V}}=-{{\mathcal {C}}}_{10\mu }^{\mathrm{V}}$$ C 9 μ V = - C 10 μ V ), often preferred from the model building point of view, accommodates the data better if lepton-flavour universal New Physics is allowed, in particular in $${{\mathcal {C}}}_{9}^{\mathrm{U}}$$ C 9 U . We observe that the LFUV observable $$Q_5$$ Q 5 offers a very interesting possibility to separate both types of scenarios. |
| first_indexed | 2024-12-12T21:56:49Z |
| format | Article |
| id | doaj.art-bfac3ee281544c4b8c548c3d5ecc7e9a |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-12-12T21:56:49Z |
| publishDate | 2022-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-bfac3ee281544c4b8c548c3d5ecc7e9a2022-12-22T00:10:37ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-04-0182411610.1140/epjc/s10052-022-10231-1$$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ +Marcel Algueró0Bernat Capdevila1Sébastien Descotes-Genon2Joaquim Matias3Martín Novoa-Brunet4Grup de Física Teòrica (Departament de Física), Universitat Autònoma de BarcelonaUniversità di Torino and INFN Sezione di TorinoUniversité Paris-Saclay, CNRS/IN2P3, IJCLabGrup de Física Teòrica (Departament de Física), Universitat Autònoma de BarcelonaUniversité Paris-Saclay, CNRS/IN2P3, IJCLabAbstract We present an up-to-date complete model-independent global fit to $$b\rightarrow s\ell \ell $$ b → s ℓ ℓ observables that confirms patterns of New Physics able to explain the data. We include the recent LHCb measurements of $$R_K$$ R K , $$R_{K_S}$$ R K S , $$R_{K^{*+}}$$ R K ∗ + , $$B_s \rightarrow \phi \mu ^+\mu ^-$$ B s → ϕ μ + μ - and $$B_s\rightarrow \mu ^+\mu ^-$$ B s → μ + μ - in our analysis, which now includes 254 observables. This updates our previous analyses and strengthens their two main outcomes. First, the presence of right-handed couplings encoded in the Wilson coefficients $${{\mathcal {C}}}_{9'\mu }$$ C 9 ′ μ and $${{\mathcal {C}}}_{10'\mu }$$ C 10 ′ μ remains a viable possibility. Second, a lepton flavour universality violating (LFUV) left-handed lepton coupling ( $${{\mathcal {C}}}_{9\mu }^{\mathrm{V}}=-{{\mathcal {C}}}_{10\mu }^{\mathrm{V}}$$ C 9 μ V = - C 10 μ V ), often preferred from the model building point of view, accommodates the data better if lepton-flavour universal New Physics is allowed, in particular in $${{\mathcal {C}}}_{9}^{\mathrm{U}}$$ C 9 U . We observe that the LFUV observable $$Q_5$$ Q 5 offers a very interesting possibility to separate both types of scenarios.https://doi.org/10.1140/epjc/s10052-022-10231-1 |
| spellingShingle | Marcel Algueró Bernat Capdevila Sébastien Descotes-Genon Joaquim Matias Martín Novoa-Brunet $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ + European Physical Journal C: Particles and Fields |
| title | $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ + |
| title_full | $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ + |
| title_fullStr | $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ + |
| title_full_unstemmed | $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ + |
| title_short | $$b\rightarrow s\ell ^+\ell ^-$$ b → s ℓ + ℓ - global fits after $$R_{K_S}$$ R K S and $$R_{K^{*+}}$$ R K ∗ + |
| title_sort | b rightarrow s ell ell b s l l global fits after r k s r k s and r k r k ∗ |
| url | https://doi.org/10.1140/epjc/s10052-022-10231-1 |
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