002281612 001__ 2281612
002281612 005__ 20210503221759.0
002281612 0247_ $$2DOI$$a10.1103/PhysRevD.96.035026
002281612 0248_ $$aoai:cds.cern.ch:2281612$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002281612 035__ $$9arXiv$$aoai:arXiv.org:1704.05672
002281612 035__ $$9Inspire$$aoai:inspirehep.net:1592392$$d2020-12-15T05:46:58Z$$h2020-12-16T03:00:05Z$$mmarcxml$$ttrue$$uhttp://old.inspirehep.net/oai2d
002281612 037__ $$9arXiv$$aarXiv:1704.05672$$chep-ph
002281612 035__ $$9Inspire$$a1592392
002281612 037__ $$aLMU-ASC-25-17
002281612 037__ $$aIFIC-17-20
002281612 041__ $$aeng
002281612 100__ $$aCelis, Alejandro$$uMunich U.$$uMunich U., ASC$$vLudwig-Maximilians-Universität München , Fakultät für Physik, Arnold Sommerfeld Center for Theoretical Physics, 80333 München, Germany
002281612 245__ $$9APS$$aGauge-invariant implications of the LHCb measurements on lepton-flavor nonuniversality
002281612 246__ $$9arXiv$$aGauge-invariant implications of the LHCb measurements on Lepton-Flavour Non-Universality
002281612 260__ $$c2017-08-25
002281612 269__ $$c2017-04-19
002281612 300__ $$a8 p
002281612 500__ $$9arXiv$$a10 pages, 2 figures, 3 tables. v2: references added, typos corrected, improved discussion in Sec. V, corrected coefficient of C7 in formula for RKstar in the low-bin, new figure with global fit in terms of SMEFT coefficients. Conclusions unchanged. v3: minor addition, shorter version to be published in PRD
002281612 520__ $$9APS$$aWe study the implications of the recent measurements of RK and RK* by the LHCb Collaboration. We do that by adopting a model-independent approach based on the Standard Model effective field theory (SMEFT), with the dominant new physics (NP) effects encoded in the coefficients of dimension-6 operators respecting the full Standard Model (SM) gauge symmetry. After providing simplified expressions for RK and RK*, we determine the implications of the recent LHCb results for these observables on the coefficients of the SMEFT operators at low and high energies. We also take into account all b→sℓℓ data, which combined lead to effective NP scenarios with SM pulls in excess of 5σ. Thus, the operators discussed in this paper would be the first dimension-6 terms in the SM Lagrangian to be detected experimentally. Indirect constraints on these operators are also discussed. The results of this paper transcend the singularity of the present situation and set a standard for future analyses in b→s transitions when the NP is assumed to lie above the electroweak scale.
002281612 520__ $$9arXiv$$aWe study the implications of the recent measurements of $R_K$ and $R_{K^*}$ by the LHCb collaboration. We do that by adopting a model-independent approach based on the Standard Model Effective Field Theory (SMEFT), in which the dominant new physics effects are encoded in the coefficients of dimension-six operators respecting the full Standard Model (SM) gauge symmetry. After providing simplified expressions for $R_K$ and $R_{K^\ast}$, we determine the implications of the recent LHCb results for these observables on the coefficients of the SMEFT operators at low and high energies. We also take into account all $b\to s \ell\ell$ data, which combined lead to effective New Physics (NP) scenarios with SM pulls in excess of 5~$\sigma$. Thus the operators discussed in this paper would be the first dimension-six terms in the SM Lagrangian to be detected experimentally. Indirect constraints on these operators are also discussed. The results of this paper transcend the singularity of the present situation, and set a standard for future analyses in $b\to s$ transitions when the NP is assumed to lie above the electroweak scale.
002281612 540__ $$aarXiv nonexclusive-distrib. 1.0$$barXiv$$uhttp://arxiv.org/licenses/nonexclusive-distrib/1.0/
002281612 542__ $$3Publication$$dAmerican Physical Society$$g2017
002281612 65017 $$2arXiv$$ahep-ph
002281612 65017 $$2SzGeCERN$$aParticle Physics - Phenomenology
002281612 690C_ $$aCERN
002281612 690C_ $$aARTICLE
002281612 693__ $$aCERN LHC$$eLHCb
002281612 700__ $$aFuentes-Martin, Javier$$uValencia U., IFIC$$vInstituto de Física Corpuscular, Universitat de València—CSIC , E-46071 València, Spain
002281612 700__ $$aVicente, Avelino$$uValencia U., IFIC$$vInstituto de Física Corpuscular, Universitat de València—CSIC , E-46071 València, Spain
002281612 700__ $$aVirto, Javier$$uU. Bern, AEC$$vAlbert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern , CH-3012 Bern, Switzerland
002281612 773__ $$c035026$$n3$$pPhys. Rev. D$$v96$$y2017
002281612 8564_ $$82226174$$s4884$$uhttp://cds.cern.ch/record/2281612/files/figures_Clq1.png$$y00000 \small \sf Predictions for $R_K$ and $R_{K^*}$ as a function of the SMEFT Wilson coefficient $\C_{\ell q}^{(1)}$ with $\Lambda = 30$~TeV. The experimental ranges for $R_K$ and $R_{K^*}$ at $95\%$~CL are also shown for comparison.
002281612 8564_ $$82226175$$s65899$$uhttp://cds.cern.ch/record/2281612/files/figures_Clq1_Cld.png$$y00001 \small \sf Constraints on the SMEFT Wilson coefficients $\C_{\ell q}^{(1)}$ and $\C_{\ell d}$ with $\Lambda = 30$~TeV, assuming no NP in the electron modes. The individual constraints from $R_K$ and $R_{K^*}$ at the $3 \sigma$ level are represented by filled bands. The combined fit to $R_K$ and $R_{K^*}$ is shown in blue (1,2 and 3 $\sigma$ contours). The result of a global fit with all $b\to s\ell^+\ell^-$ data included in~\cite{Capdevila:2017bsm} is shown in a similar way as red dashed contours.
002281612 8564_ $$82226176$$s699948$$uhttp://cds.cern.ch/record/2281612/files/arXiv:1704.05672.pdf$$yPreprint
002281612 960__ $$a13
002281612 980__ $$aARTICLE