Vector leptoquark resolution of R K and RD(⁎) puzzles

By S. Fajfer, Nejc Kovsnik. 2015

302 citations recorded by the source corpus.

Abstract We propose that three recent anomalies in B meson decays, R D ( ⁎ ) , R K , and P 5 ′ , might be explained by only one vector leptoquark weak triplet state. The constraints on the parameter space are obtained by considering t → b τ + ν data, lepton flavor universality tests in the kaon sector, bounds on the lepton flavor violating decay B → K μ τ , and b → c μ − ν ¯ decays. The presence of such vector leptoquark could be exposed in precise measurements of top semitauonic decays to b quark. The model predicts enhanced decay rate of B → K ν ¯ ν , approximate equality of lepton flavor universality ratios R K ⁎ , R K , and suppressed branching fraction of B s → μ + μ − .

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e95fcb04acc1d26b27b37d9c12fd6f093b25e9f6

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Citations in the corpus

Review of lepton universality tests in B decays (2018, background): “ector-like fermions [180,181], or in Z0models with a gauged horizontal symmetry [213]. Concerning leptoquarks, here a single representation (either R2 or U1) can generate a CNP 9 = C NP 10 solution [176,177,195, 196,198,214,215]. This pattern can also be obtained in models with loop contributions fr”
Revisiting the one leptoquark solution to the R(D(∗)) anomalies and its phenomenological implications (2016, background): “The above anomalies have been investigated extensively both within model-independent frameworks [14–35], as well as in some specific NP models where the b → cτ ν̄τ transition is mediated by leptoquarks [14, 15, 36–44], charged Higgses [14, 45–55], charged vector bosons [14, 56–58], and sparticles [5”