publication . Article . Preprint . 2016

Palatable leptoquark scenarios for lepton flavor violation in exclusive b → sℓ 1 ℓ 2 modes

D. Bečirević; N. Košnik; O. Sumensari; R. Zukanovich Funchal;
Open Access English
  • Published: 01 Jan 2016
  • Publisher: HAL CCSD
  • Country: France
Abstract
We examine various scenarios that involve a light ${\cal O}(1 TeV)$ leptoquark state and select those which are compatible with the current experimental values for $\mathcal{B}(B_s\to \mu\mu)$, $\mathcal{B}(B\to K\mu\mu)_{\mathrm{large}-q^2}$, $R_K=\mathcal{B^\prime}(B\to K\mu\mu)/\mathcal{B^\prime}(B\to Kee)$, and which lead to predictions consistent with other experimental data. We show that two such scenarios are phenomenologically plausible, namely the one with a doublet of scalar leptoquarks of hypercharge $1/6$, and the one with a triplet of vector leptoquarks of hypercharge $2/3$. We also argue that a model with a singlet scalar leptoquark of hypercharge ...
Subjects
arXiv: High Energy Physics::PhenomenologyHigh Energy Physics::Experiment
free text keywords: Beyond Standard Model, B/s0 --> muon tau, B --> K muon tau, B --> K*(892) muon tau, B --> K electron positron, B --> K muon+ muon-, B/s0 --> muon+ muon-, B: branching ratio: ratio, B: semileptonic decay, B/s0: branching ratio, B/s0: rare decay, strangeness: production, B/s0: leptonic decay, lepton: pair production, bottom: semileptonic decay, lepton: flavor: violation, leptoquark: scalar, new physics, Effective field theories, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat], [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], [ PHYS.HLAT ] Physics [physics]/High Energy Physics - Lattice [hep-lat], Nuclear and High Energy Physics, High Energy Physics - Phenomenology, High Energy Physics - Experiment, High Energy Physics - Lattice, Flavor, Particle physics, Lepton, Leptoquark, Physics beyond the Standard Model, Physics, Strangeness production
Funded by
EC| ELUSIVES
Project
ELUSIVES
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN

[5] A. Abada, D. Becirevic, M. Lucente and O. Sumensari, Lepton vector quarkonia and of the Z boson, Phys. Rev. D 91 (2015) 113013 [arXiv:1503.04159] [6] V. De Romeri, M.J. Herrero, X. Marcano and F. Scarcella, Lepton [24] D. Becirevic, N. Kosnik and A. Tayduganov, B ! D [25] R. Alonso, B. Grinstein and J. Martin Camalich, SU(2) shape of new physics in rare B decays, Phys. Rev. Lett. 113 (2014) 241802 [26] G. Hiller and M. Schmaltz, Diagnosing lepton-nonuniversality in b ! s``, JHEP 02 (2015) [27] D. Ghosh, M. Nardecchia and S.A. Renner, Hint of lepton [43] D. Becirevic, S. Fajfer and N. Kosnik, Lepton [44] S. Fajfer and N. Kosnik, Vector leptoquark resolution of RK and RD( ) puzzles, Phys. Lett. B [45] M. Bauer and M. Neubert, Minimal leptoquark explanation for the RD( ) , RK and (g anomalies, Phys. Rev. Lett. 116 (2016) 141802 [arXiv:1511.01900] [INSPIRE].

[46] A. Greljo, G. Isidori and D. Marzocca, On the breaking of lepton avor universality in B [47] W. Altmannshofer, A.J. Buras, D.M. Straub and M. Wick, New strategies for new physics [49] W. Altmannshofer, P. Ball, A. Bharucha, A.J. Buras, D.M. Straub and M. Wick, [52] B. Schrempp and F. Schrempp, Light leptoquarks, Phys. Lett. B 153 (1985) 101 [INSPIRE].

[53] W. Buchmuller, R. Ruckl and D. Wyler, Leptoquarks in lepton-quark collisions, Phys. Lett. [65] S. Descotes-Genon, L. Hofer, J. Matias and J. Virto, Global analysis of b ! s`` anomalies, [68] HPQCD collaboration, C. Bouchard, G.P. Lepage, C. Monahan, H. Na and J. Shigemitsu, [83] L. Lavoura, General formulae for f (1) ! f (2) , Eur. Phys. J. C 29 (2003) 191 [84] R.J. Dowdall, C.T.H. Davies, G.P. Lepage and C. McNeile, Vus from [85] N. Carrasco et al., Leptonic decay constants fK , fD, and fDs with Nf = 2 + 1 + 1 twisted-mass lattice QCD, Phys. Rev. D 91 (2015) 054507 [arXiv:1411.7908] [INSPIRE].

[86] Fermilab Lattice, MILC collaboration, A. Bazavov et al., Charmed and light [87] P. Ball and R. Zwicky, New results on B ! [88] P. Ball and R. Zwicky, Bd;s ! ; !; K ; decay form-factors from light-cone sum rules revisited, Phys. Rev. D 71 (2005) 014029 [hep-ph/0412079] [INSPIRE].

[89] HPQCD collaboration, G.C. Donald et al., Vcs from Ds !

Abstract
We examine various scenarios that involve a light ${\cal O}(1 TeV)$ leptoquark state and select those which are compatible with the current experimental values for $\mathcal{B}(B_s\to \mu\mu)$, $\mathcal{B}(B\to K\mu\mu)_{\mathrm{large}-q^2}$, $R_K=\mathcal{B^\prime}(B\to K\mu\mu)/\mathcal{B^\prime}(B\to Kee)$, and which lead to predictions consistent with other experimental data. We show that two such scenarios are phenomenologically plausible, namely the one with a doublet of scalar leptoquarks of hypercharge $1/6$, and the one with a triplet of vector leptoquarks of hypercharge $2/3$. We also argue that a model with a singlet scalar leptoquark of hypercharge ...
Subjects
arXiv: High Energy Physics::PhenomenologyHigh Energy Physics::Experiment
free text keywords: Beyond Standard Model, B/s0 --> muon tau, B --> K muon tau, B --> K*(892) muon tau, B --> K electron positron, B --> K muon+ muon-, B/s0 --> muon+ muon-, B: branching ratio: ratio, B: semileptonic decay, B/s0: branching ratio, B/s0: rare decay, strangeness: production, B/s0: leptonic decay, lepton: pair production, bottom: semileptonic decay, lepton: flavor: violation, leptoquark: scalar, new physics, Effective field theories, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat], [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], [ PHYS.HLAT ] Physics [physics]/High Energy Physics - Lattice [hep-lat], Nuclear and High Energy Physics, High Energy Physics - Phenomenology, High Energy Physics - Experiment, High Energy Physics - Lattice, Flavor, Particle physics, Lepton, Leptoquark, Physics beyond the Standard Model, Physics, Strangeness production
Funded by
EC| ELUSIVES
Project
ELUSIVES
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN

[5] A. Abada, D. Becirevic, M. Lucente and O. Sumensari, Lepton vector quarkonia and of the Z boson, Phys. Rev. D 91 (2015) 113013 [arXiv:1503.04159] [6] V. De Romeri, M.J. Herrero, X. Marcano and F. Scarcella, Lepton [24] D. Becirevic, N. Kosnik and A. Tayduganov, B ! D [25] R. Alonso, B. Grinstein and J. Martin Camalich, SU(2) shape of new physics in rare B decays, Phys. Rev. Lett. 113 (2014) 241802 [26] G. Hiller and M. Schmaltz, Diagnosing lepton-nonuniversality in b ! s``, JHEP 02 (2015) [27] D. Ghosh, M. Nardecchia and S.A. Renner, Hint of lepton [43] D. Becirevic, S. Fajfer and N. Kosnik, Lepton [44] S. Fajfer and N. Kosnik, Vector leptoquark resolution of RK and RD( ) puzzles, Phys. Lett. B [45] M. Bauer and M. Neubert, Minimal leptoquark explanation for the RD( ) , RK and (g anomalies, Phys. Rev. Lett. 116 (2016) 141802 [arXiv:1511.01900] [INSPIRE].

[46] A. Greljo, G. Isidori and D. Marzocca, On the breaking of lepton avor universality in B [47] W. Altmannshofer, A.J. Buras, D.M. Straub and M. Wick, New strategies for new physics [49] W. Altmannshofer, P. Ball, A. Bharucha, A.J. Buras, D.M. Straub and M. Wick, [52] B. Schrempp and F. Schrempp, Light leptoquarks, Phys. Lett. B 153 (1985) 101 [INSPIRE].

[53] W. Buchmuller, R. Ruckl and D. Wyler, Leptoquarks in lepton-quark collisions, Phys. Lett. [65] S. Descotes-Genon, L. Hofer, J. Matias and J. Virto, Global analysis of b ! s`` anomalies, [68] HPQCD collaboration, C. Bouchard, G.P. Lepage, C. Monahan, H. Na and J. Shigemitsu, [83] L. Lavoura, General formulae for f (1) ! f (2) , Eur. Phys. J. C 29 (2003) 191 [84] R.J. Dowdall, C.T.H. Davies, G.P. Lepage and C. McNeile, Vus from [85] N. Carrasco et al., Leptonic decay constants fK , fD, and fDs with Nf = 2 + 1 + 1 twisted-mass lattice QCD, Phys. Rev. D 91 (2015) 054507 [arXiv:1411.7908] [INSPIRE].

[86] Fermilab Lattice, MILC collaboration, A. Bazavov et al., Charmed and light [87] P. Ball and R. Zwicky, New results on B ! [88] P. Ball and R. Zwicky, Bd;s ! ; !; K ; decay form-factors from light-cone sum rules revisited, Phys. Rev. D 71 (2005) 014029 [hep-ph/0412079] [INSPIRE].

[89] HPQCD collaboration, G.C. Donald et al., Vcs from Ds !

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