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Constraints on Vector Leptoquark Masses from Data on the\(K_{L}^{0} \to l_{i}^{ + }l_{j}^{ - }\) and\({{B}^{0}},B_{s}^{0} \to l_{i}^{ + }l_{j}^{ - }\) Decays

  • PHYSICS OF ELEMENTARY PARTICLES AND ATOMIC NUCLEI. THEORY
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Abstract

Vector-leptoquark contributions to the \(K_{L}^{0} \to l_{i}^{ + }l_{j}^{ - },\)\({{B}^{0}} \to l_{i}^{ + }l_{j}^{ - },\) and \(B_{s}^{0} \to l_{i}^{ + }l_{j}^{ - }\) decay widths are derived in the framework of a minimal model with four-color symmetry. Constraints on the gauge vector leptoquark mass are imposed using the experimental data on the \({{B}^{0}} \to l_{i}^{ + }l_{j}^{ - }\) and \(B_{s}^{0} \to l_{i}^{ + }l_{j}^{ - }\) decays. We find that the lower limit on the vector-leptoquark mass is reduced from 2200 down to 91 TeV if fermion mixing is considered.

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REFERENCES

  1. J. C. Pati and A. Salam, “Lepton number as the fourth color,” Phys. Rev. D: Part. Fields 10, 275 (1974).

    Article  ADS  Google Scholar 

  2. A. D. Smirnov, “The minimal quark-lepton symmetry model and the limit on Z-prime mass,” Phys. Lett. B 346, 297–302 (1995); arXiv:9503239 [hep-ph].

  3. A. D. Smirnov, “Minimal four color model with quark—lepton symmetry and constraints on the Z‑prime boson mass,” Phys. At. Nucl. 58, 2137–2143 (1995).

    Google Scholar 

  4. A. V. Kuznetsov and N. V. Mikheev, “Vector leptoquarks could be rather light?,” Phys. Lett. B 329, 295–299 (1994); arXiv:9406347 [hep-ph].

  5. A. V. Kuznetsov and N. V. Mikheev, “New type of mixing in the minimal quark - lepton symmetry and a lower bound on the vector leptoquark mass,” Phys. At. Nucl. 58, 2113–2119 (1995).

    Google Scholar 

  6. G. Valencia and S. Willenbrock, “Quark - lepton unification and rare meson decays,” Phys. Rev. D: Part. Fields 50, 6843–6848 (1994).

    Article  ADS  Google Scholar 

  7. A. V. Kuznetsov, N. V. Mikheev, and A. V. Serghienko, “The third type of fermion mixing in the lepton and quark interactions with leptoquarks,” Int. J. Mod. Phys. A 27, 1250062-1–1250062-19 (2012); arXiv:1203.0196 [hep-ph].

  8. A. V. Povarov, “The parameters of the fermion-mixing and search restriction on a mass leptoquark,” EPJ Web Conf. 158, 02007 (2017). https://doi.org/10.1051/epjconf/201715802007

  9. A. D. Smirnov, “On mass limits for vector leptoquarks from \(K_{0}^{L},{{B}_{0}},{{B}_{s}} \to l_{i}^{ + }l_{j}^{ - }\) decays with account of fermion mixing,” EPJ Web Conf. 158, 02004 (2017). https://doi.org/10.1051/epjconf/201715802004

  10. A. D. Smirnov, “Vector leptoquark mass limits and branching ratios of \(K_{0}^{L},{{B}_{0}},{{B}_{s}} \to l_{i}^{ + }l_{j}^{ - }\) decays with account of fermion mixing in leptoquark currents,” Mod. Phys. Lett. A 71, 1850019 (2018); arXiv:1801.02895 [hep-ph].

  11. A. D. Smirnov, “Contributions of gauge and scalar leptoquarks to \(K_{0}^{L} \to l_{i}^{ + }l_{j}^{ - }\) and \({{B}_{0}} \to l_{i}^{ + }l_{j}^{ - }\) decay and constraints on leptoquark masses from the decays \(K_{0}^{L}\)→ e ±μ± and B 0→ e ±τ±,” Phys. At. Nucl. 71, 1470–1480 (2008).

    Article  Google Scholar 

  12. C. Patrighani et al. (Particle Data Group), “2016 review of particle physics,” Chin. Phys. C 40, 100001 (2016).

    Article  ADS  Google Scholar 

  13. R. Aaij et al. (LHCb Collab.), “Measurement of the \(B_{s}^{0} \to {{\mu }^{ + }}{{\mu }^{ - }}\) branching fraction and effective lifetime and search for \({{B}^{0}} \to {{\mu }^{ + }}{{\mu }^{ - }}\) decays,” Phys. Rev. Lett. 118, 191801 (2017); arXiv:1703.05747 [hep-ex].

  14. R. Aaij et al. (LHCb Collab.), “Search for the decays \(B_{s}^{0} \to {{\tau }^{ + }}{{\tau }^{ - }}\) and \({{B}^{0}} \to {{\tau }^{ + }}{{\tau }^{ - }}\),” Phys. Rev. Lett. 118, 251802 (2017); arXiv:1703.02508 [hep-ex].

  15. R. Aaij, et al., “LHCb collaboration. search for the lepton-flavour violating decays \(B_{s}^{0}\) → e±μ±,” J. High Energy Phys. 1803, 078 (2018); arXiv:1710:04111 [hep-ex].

  16. R. Aaij et al. (LHCb Collab.), “Search for the lepton-flavor-violating decays \(B_{s}^{0}\) → e±μ± and B 0 → e±μ±,” Phys. Rev. Lett. 11, 141801 (2013); arXiv:1307.4889 [hep-ex].

    Article  ADS  Google Scholar 

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  1. Yaroslavl Higher Military Institute of the Air Defense, 150001, Yaroslavl’, Russia

    A. V. Povarov

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  1. A. V. Povarov
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Correspondence to A. V. Povarov.

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Translated by A. Asratyan

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Povarov, A.V. Constraints on Vector Leptoquark Masses from Data on the\(K_{L}^{0} \to l_{i}^{ + }l_{j}^{ - }\) and\({{B}^{0}},B_{s}^{0} \to l_{i}^{ + }l_{j}^{ - }\) Decays. Phys. Part. Nuclei Lett. 16, 1–5 (2019). https://doi.org/10.1134/S1547477119010102

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