Reinterpretation of LHC Results for New Physics: Status and recommendations after Run 2

We report on the status of efforts to improve the reinterpretation of searches and measurements at the LHC in terms of models for new physics, in the context of the LHC Reinterpretation Forum. We detail current experimental offerings in direct searches for new particles, measurements, technical implementations and Open Data, and provide a set of recommendations for further improving the presentation of LHC results in order to better enable reinterpretation in the future. We also provide a brief description of existing software reinterpretation frameworks and recent global analyses of new physics that make use of the current data

Recent B-decay implications beyond the Standard Model

N° d'ordre: DU 2354, EDSF : 748There are fast progresses in the experimental study of rare decays of mesons containing a b-quark, and involving a pair of leptons and an s-quark. The present work measures the indirect implications of these progresses on the supersymmetric extensions of the Standard Model. Even within constrained models, the indirect limits obtained in this way can in some cases be stronger than those coming from direct searches of supersymmetric particles. The accuracy gained by the form factors and higher order corrections newly implemented in the public code "SuperIso" are then fully relevant.Des progr ès exp erimentaux importants sont en cours dans l' étude des d ésint égrations rares de m ésons contenant un quark beau et impliquant un quark étrange et une paire de leptons. Le travail pr ésent mesure la port ée indirecte de ces progr ès sur des extensions supersym etriques du mod èle standard. Même dans des mod èles contraints, les limites indirectes ainsi obtenues peuvent dans certains cas être plus fortes que celles provenant de la recherche directe de particules supersym étriques. La pr écision gagn ée par les facteurs de forme et les corrections d'ordre sup érieur nouvellement impl ément és dans le programme public "SuperIso" montrent alors leur importance

Flavour Physics Phenomenology with SuperIso

International audienceWe present an overview of SuperIso v4.1 which is a public program for the calculation of flavour physics observables. We give examples of using SuperIso to constrain new physics scenarios with kaon physics and present the implications of rare B-decays

Recent B-decay implications beyond the standard model

Des progrès expérimentaux importants sont en cours dans l étude des désintégrations rares de mésons contenant un quark beau et impliquant un quark étrange et une paire de leptons. Le travail présent mesure la portée indirecte de ces progrés sur des extensions supersymétriques du modèle standard. Même dans des modèles contraints, les limites indirectes ainsi obtenues peuvent dans certains cas être plus fortes que celles provenant de la recherche directe de particules supersymétriques. La précision gagnée par les facteurs de forme et les corrections d ordre supérieur nouvellement implémentés dans le programme public SuperIso montrent alors leur importance.There are fast progresses in the experimental study of rare decay sof mesons containing a b-quark, and involving a pair of leptons and an s-quark. The present work measures the indirect implications of these progresses on the supersymmetric extensions of the Standard Model. Even within constrained models, the indirect limits obtained in this way can in some cases be stronger than those coming from direct searches of supersymmetric particles. The accuracy gained by the form factors and higher order corrections newly implemented in the public code SuperIso are then fully relevant.CLERMONT FD-Bib.électronique (631139902) / SudocSudocFranceF

Implications of flavour anomalies for new physics

International audienceWe discuss the observed deviations in $b \to s \ell^+ \ell^-$ processes from the Standard Model predictions and present global fits for both hadronic effects and the New Physics description of these anomalies. We investigate whether the different anomalies can be described by a consistent New Physics effect. We consider all the possible relevant new physics contributions to the semileptonic $b \to s$ transitions. Moreover, we study the prospects of future LHCb upgrade for establishing New Physics with the theoretically clean observables

Present Status of b→sℓ+ℓ−b \to s \ell^+ \ell^− Anomalies

International audienceWe discuss the observed deviations in b→sℓ+ℓ− processes from the Standard Model predictions and present global fits for the New Physics description of these anomalies. We further investigate the stability of the global fits under different theoretical assumptions and suggest strategies and a number of observables to clear up the source of the anomalies

BSM fits for rare B decays

International audienceThe LHCb experiment has made several measurements in $b \to s$ transitions which indicate tensions with the Standard Model predictions.We examine how the significance of the tensions in $B \to K^* \mu^+\mu^-$ observables depend on the various theory implementations of the long-distance effects.We also consider a general parameterisation, consistent with the analyticity structure of the amplitudes and make a statistical comparison to find whether the most favoured explanation of the anomalies is new physics or underestimated hadronic effects.Furthermore, assuming the source of the anomalies to be new physics, to get a fair view of how significantly favoured it is, we perform a global fit to all the Wilson coefficients which can effectively receive beyond the Standard Model contributions

New global fits to b→sb \to s data with all relevant parameters

International audienceThe LHCb experiment has made several measurements in b→s transitions which indicate tensions with the Standard Model predictions. Assuming the source of these tensions to be new physics, we present new global fits to all Wilson coefficients which can effectively receive beyond the Standard Model contributions. While the theoretically clean ratios RK(⁎) which are sensitive to lepton flavour non-universality may unambiguously establish lepton non-universal new physics in the near future, most of the other tensions with the SM in the b→s data, in particular in the angular observables of the B→K⁎μμ decays and in the branching ratios of the Bs→ϕμμ decays, depend on the estimates of non-factorisable power corrections. Therefore, we also analyze the dependence of the new global fit on these corrections

Model independent analysis for B anomalies

International audienceWe discuss the implications of b → sℓ+ℓ− measurements and their deviations with respect to the Standard Model predictions in a model-independent framework. We highlight in particular the impact of the recent updated measurements including the updated Bs → ϕµ+µ− branching ratios and angular observables, the recent CMS measurement of the branching ratio of Bs → µ+µ−, and the LHCb measured lepton flavour universality violating ratios and RK∗+. In addition, we check the compatibility of the new physics effect for the theoretically clean observables with the rest of the neutral B decays observables

New Physics Implications and prospects of LHCb flavour anomalies

International audienceWe analyse the new physics implications of theoretically clean $b \to s$ observables in a model-independent approach and compare their coherence with the implications of other rare $B$-decays. A statistical comparison is done between the New Physics explanation and hadronic contributions as the source of the anomalies in angular observables of the $B \to K^* \mu \mu$ decay. We make projections for future measurements that indicate that LHCb will be in the position to discover lepton non-universality via a single observable using the Run 3 data. The global fit of rare $B$-decays is given within a multidimensional fit involving all the 20 relevant Wilson coefficients