A. Kusenko, Sterile neutrinos: the dark side of the light fermions, Phys. Rept. 481 (2009) 1 [arXiv:0906.2968] [INSPIRE].
K. Abazajian et al., Light sterile neutrinos: a white paper, arXiv:1204.5379 [INSPIRE].
J. Schechter and J. Valle, Neutrino masses in SU(2) × U(1) theories, Phys. Rev. D 22 (1980) 2227 [INSPIRE].
M. Gronau, C.N. Leung and J.L. Rosner, Extending limits on neutral heavy leptons, Phys. Rev. D 29 (1984) 2539 [INSPIRE].
R.E. Shrock, New tests for and bounds on, neutrino masses and lepton mixing, Phys. Lett. B 96 (1980) 159 [INSPIRE].
R.E. Shrock, General theory of weak leptonic and semileptonic decays. 1. Leptonic pseudoscalar meson decays, with associated tests for and bounds on, neutrino masses and lepton mixing, Phys. Rev. D 24 (1981) 1232 [INSPIRE].
E. Nardi, E. Roulet and D. Tommasini, Limits on neutrino mixing with new heavy particles, Phys. Lett. B 327 (1994) 319 [hep-ph/9402224] [INSPIRE].
A. Abada, D. Das, A. Teixeira, A. Vicente and C. Weiland, Tree-level lepton universality violation in the presence of sterile neutrinos: impact for Rk and RΠ, JHEP 02 (2013) 048 [arXiv:1211.3052] [INSPIRE].
A. Ilakovac and A. Pilaftsis, Flavor violating charged lepton decays in seesaw-type models, Nucl. Phys. B 437 (1995) 491 [hep-ph/9403398] [INSPIRE].
F. Deppisch and J. Valle, Enhanced lepton flavor violation in the supersymmetric inverse seesaw model, Phys. Rev. D 72 (2005) 036001 [hep-ph/0406040] [INSPIRE].
T. Asaka, S. Blanchet and M. Shaposhnikov, The ?MSM, dark matter and neutrino masses, Phys. Lett. B 631 (2005) 151 [hep-ph/0503065] [INSPIRE].
A. Ibarra, E. Molinaro and S. Petcov, TeV scale see-saw mechanisms of neutrino mass generation, the Majorana nature of the heavy singlet neutrinos and (β β)0v-decay, JHEP 09 (2010) 108 [arXiv:1007.2378] [INSPIRE].
R.N. Mohapatra and J.W.F. Valle, Neutrino mass and baryon number nonconservation in superstring models, Phys. Rev. D 34 (1986) 1642 [INSPIRE].
P. Minkowski,A μ → eυ at a rate of one out of 1-billion muon decays?, Phys. Lett. B 67 (1977) 421 [INSPIRE].
T. Yanagida, Horizontal symmetry and masses of neutrinos, in the proceedings of the Workshop on unified theory and baryon number in the universe, O. Sawada and A. Sugamoto eds., KEK, Tsukuba, Japan (1979).
M. Gell-Mann, P. Ramond, R. Slansky, Complex spinors and unified theories, in Supergravity, D.Z. Freedman and P.van Nieuwenhuizen eds., North Holland, Amsterdam, The Netherlands (1979).
R.N. Mohapatra and G. Senjanović, Neutrino mass and spontaneous parity violation, Phys. Rev. Lett. 44 (1980) 912 [INSPIRE].
D. Forero, M. Tortola and J.W.F. Valle, Global status of neutrino oscillation parameters after Neutrino-2012, Phys. Rev. D 86 (2012) 073012 [arXiv:1205.4018] [INSPIRE].
G.L. Fogli et al., Global analysis of neutrino masses, mixings and phases: entering the era of leptonic CP-violation searches, Phys. Rev. D 86 (2012) 013012 [arXiv:1205.5254] [INSPIRE].
M. Gonzalez-Garcia, M. Maltoni, J. Salvado and T. Schwetz, Global fit to three neutrino mixing: critical look at present precision, JHEP 12 (2012) 123 [arXiv:1209.3023] [INSPIRE].
X. Qian, C. Zhang, M. Diwan and P. Vogel, Unitarity tests of the neutrino mixing matrix, arXiv:1308.5700 [INSPIRE].
S. Antusch, J.P. Baumann and E. Fernandez-Martinez, Non-standard neutrino interactions with matter from physics beyond the standard model, Nucl. Phys. B 810 (2009) 369 [arXiv:0807.1003] [INSPIRE].
F. del Aguila, J. de Blas and M. Pérez-Victoria, Effects of new leptons in electroweak precision data, Phys. Rev. D 78 (2008) 013010 [arXiv:0803.4008] [INSPIRE].
E. Akhmedov, A. Kartavtsev, M. Lindner, L. Michaels and J. Smirnov, Improving electro-weak fits with TeV-scale sterile neutrinos, JHEP 05 (2013) 081 [arXiv:1302.1872] [INSPIRE].
L. Basso, O. Fischer and J.J. vander Bij, Precision tests of unitarity in leptonic mixing, arXiv:1310.2057 [INSPIRE].
Particle Data Group collaboration, J. Beringer et al., Review of particle physics, Phys. Rev. D 86 (2012) 010001 [INSPIRE].
A. Atre, T. Han, S. Pascoli and B. Zhang, The search for heavy Majorana neutrinos, JHEP 05 (2009) 030 [arXiv:0901.3589] [INSPIRE].
L. Lello and D. Boyanovsky, Searching for sterile neutrinos from π and K decays, Phys. Rev. D 87 (2013) 073017 [arXiv:1208.5559] [INSPIRE].
MEG collaboration, J. Adam et al., New constraint on the existence of the mu+ → e+υ decay, Phys. Rev. Lett. 110 (2013) 201801 [arXiv:1303.0754] [INSPIRE].
A. Ilakovac and A. Pilaftsis, Supersymmetric lepton flavour violation in low-scale seesaw models, Phys. Rev. D 80 (2009) 091902 [arXiv:0904.2381] [INSPIRE].
R. Alonso, M. Dhen, M. Gavela and T. Hambye, Muon conversion to electron in nuclei in type-I seesaw models, JHEP 01 (2013) 118 [arXiv:1209.2679] [INSPIRE].
A. Ilakovac, A. Pilaftsis and L. Popov, Charged lepton flavor violation in supersymmetric low-scale seesaw models, Phys. Rev. D 87 (2013) 053014 [arXiv:1212.5939] [INSPIRE].
A. Abada, D. Das, A. Vicente and C. Weiland, Enhancing lepton flavour violation in the supersymmetric inverse seesaw beyond the dipole contribution, JHEP 09 (2012) 015 [arXiv:1206.6497] [INSPIRE].
P. Bhupal Dev, R. Franceschini and R.N. Mohapatra, Bounds on TeV seesaw models from LHC Higgs data, Phys. Rev. D 86 (2012) 093010 [arXiv:1207.2756] [INSPIRE].
C.G. Cely, A. Ibarra, E. Molinaro and S. Petcov, Higgs decays in the low scale type I see-saw model, Phys. Lett. B 718 (2013) 957 [arXiv:1208.3654] [INSPIRE].
P. Bandyopadhyay, E.J. Chun, H. Okada and J.-C. Park, Higgs signatures in inverse seesaw model at the LHC, JHEP 01 (2013) 079 [arXiv:1209.4803] [INSPIRE].
F.F. Deppisch, M. Hirsch and H. Pas, Neutrinoless double beta decay and physics beyond the standard model, J. Phys. G 39 (2012) 124007 [arXiv:1208.0727] [INSPIRE].
GERDA collaboration, M. Agostini et al., Results on neutrinoless double beta decay of 76Ge from GERDA Phase I, Phys. Rev. Lett. 111 (2013) 122503 [arXiv:1307.4720] [INSPIRE].
J. Helo, M. Hirsch, S. Kovalenko and H. Pas, Neutrinoless double beta decay and lepton number violation at the LHC, Phys. Rev. D 88 (2013) 011901 [arXiv:1303.0899] [INSPIRE].
J. Helo, M. Hirsch, H. Päs and S. Kovalenko, Short-range mechanisms of neutrinoless double beta decay at the LHC, Phys. Rev. D 88 (2013) 073011 [arXiv:1307.4849] [INSPIRE].
CMS collaboration, Search for heavy Majorana neutrinos in μ+μ + [μ-μ -] and e+e+ [e-e-] events in pp collisions at √s = 7 TeV, Phys. Lett. B 717 (2012) 109 [arXiv:1207.6079] [INSPIRE].
A.Y. Smirnov and R. Zukanovich Funchal, Sterile neutrinos: direct mixing effects versus induced mass matrix of active neutrinos, Phys. Rev. D 74 (2006) 013001 [hep-ph/0603009] [INSPIRE].
G. Gelmini, E. Osoba, S. Palomares-Ruiz and S. Pascoli, MeV sterile neutrinos in low reheating temperature cosmological scenarios, JCAP 10 (2008) 029 [arXiv:0803.2735] [INSPIRE].
B. Dasgupta and J. Kopp, A ménage a trois of eV-scale sterile neutrinos, cosmology and structure formation, Phys. Rev. Lett. 112 (2014) 031803 [arXiv:1310.6337] [INSPIRE].
B.A. Kniehl, F. Madricardo and M. Steinhauser, Gauge independent W boson partial decay widths, Phys. Rev. D 62 (2000) 073010 [hep-ph/0005060] [INSPIRE].
ALEPH, DELPHI, L3, OPAL, LEP Electroweak Working Group collaboration, J. Alcaraz et al., A combination of preliminary electroweak measurements and constraints on the standard model, hep-ex/0612034 [INSPIRE].
A. Filipuzzi, J. Portoles and M. Gonzalez-Alonso, U(2)5 flavor symmetry and lepton universality violation in W → t?t , Phys. Rev. D 85 (2012) 116010 [arXiv:1203.2092] [INSPIRE].
A. Pich, I. Boyko, D. Dedovich and I.I. Bigi, Tau decays, Int. J. Mod. Phys. A 241 (2009) 715 [INSPIRE].
BaBar collaboration, B. Aubert et al., Measurements of charged current lepton universality and V5 using tau lepton decays to to e -v̄evτ, μn̄nuμvτ, π-vτ and K-v, Phys. Rev. Lett. 105 (2010) 01602 [arXiv:0912.0242] [INSPIRE].
A. Ferroglia, C. Greub, A. Sirlin and Z. Zhang, Contributions of the W-boson propagator to muon and tau leptonic decay rates, Phys. Rev. D 88 (2013) 033012 [arXiv:1307.6900] [INSPIRE].
M. Fael, L. Mercolli and M. Passera, W-propagator corrections to muon and t leptonic decays, Phys. Rev. D 88 (2013) 093011 [arXiv:1310.1081] [INSPIRE].
V. Cirigliano and I. Rosell, Two-loop effective theory analysis of π(K) → enu/e[λ] branching ratios, Phys. Rev. Lett. 99 (2007) 231801 [arXiv:0707.3439] [INSPIRE].
M. Finkemeier, Radiative corrections to p(l2) and K(l2) decays, Phys. Lett. B 387 (1996) 391 [hep-ph/9505434] [INSPIRE].
NA48/2, NA62 collaboration, E. Goudzovski, Kaon programme at CERN: recent results, PoS(EPS-HEP2011)181 [arXiv:1111.2818] [INSPIRE].
NA62 collaboration, C. Lazzeroni et al., Precision measurement of the ratio of the charged kaon leptonic decay rates, Phys. Lett. B 719 (2013) 326 [arXiv:1212.4012] [INSPIRE].
G. Czapek et al., Branching ratio for the rare pion decay into positron and neutrino, Phys. Rev. Lett. 70 (1993) 17 [INSPIRE].
NA48/2, NA62 collaboration, E. Goudzovski, Kaon experiments at CERN: recent results and prospects, arXiv:1208.2885 [INSPIRE].
S. Strauch, Searches for new physics with the TREK detector, PoS(KAON13)014.
D. Pocanicet al., New studies of allowed pion and muon decays, arXiv:1210.5025 [INSPIRE].
C. Malbrunot et al., Measurement of the pion branching ratio at TRIUMF, AIP Conf. Proc. 1441 (2012) 564 [INSPIRE].
T. Spadaro, private communication.
H. -B. Li, Proceedings of 4th International Workshop on Charm Physics (CHARM 2010): Beijing, China, October 21-24, 2010, Int. J. Mod. Phys. Conf. Ser. 02 (2011).
CLEO collaboration, P. Naik et al., Measurement of the pseudoscalar decay constant f(Ds) using D+s → τ+v, τ+ → +n-u decays, Phys. Rev. D 80 (2009) 112004 [arXiv:0910.3602] [INSPIRE].
D. Becirevic, B. Blossier, A. Gerardin, A. Le Yaouanc and F. Sanfilippo, On the significance of B-decays to radially excited D, Nucl. Phys. B 872 (2013) 313 [arXiv:1301.7336] [INSPIRE].
S. Aoki et al., Review of lattice results concerning low energy particle physics, arXiv:1310.8555 [INSPIRE].
M. Antonelli et al., Flavor physics in the quark sector, Phys. Rept. 494 (2010) 197 [arXiv:0907.5386] [INSPIRE].
J. Charles et al., Predictions of selected flavour observables within the standard model, Phys. Rev. D 84 (2011) 033005 [arXiv:1106.4041] [INSPIRE].
UTfit collaboration, M. Bona et al., An improved standard model prediction of BR(B → t?) and its implications for new physics, Phys. Lett. B 687 (2010) 61 [arXiv:0908.3470] [INSPIRE].
HPQCD collaboration, R. Dowdall, C. Davies, R. Horgan, C. Monahan and J. Shigemitsu, B-meson decay constants from improved lattice nonrelativistic QCD with physical u, d, s and c quarks, Phys. Rev. Lett. 110 (2013) 222003 [arXiv:1302.2644] [INSPIRE].
Fermilab Lattice Collaboration, MILC collaboration, A. Bazavov et al., B- and D-meson decay constants from three-flavor lattice QCD, Phys. Rev. D 85 (2012) 114506 [arXiv:1112.3051] [INSPIRE].
B. Blossier, Lattice renormalisation of O(a) improved heavy-light operators: an addendum, Phys. Rev. D 84 (2011) 097501 [arXiv:1106.2132] [INSPIRE].
Belle collaboration, I. Adachi et al., Measurement of B- → Τ--vΤ with a hadronic tagging method using the full data sample of Belle, Phys. Rev. Lett. 110 (2013) 131801 [arXiv:1208.4678] [INSPIRE].
BaBar collaboration, B. Aubert et al., A search for B+ → t+? with hadronic B tags, Phys. Rev. D 77 (2008) 011107 [arXiv:0708.2260] [INSPIRE].
BaBar collaboration, J. Lees et al., Evidence for an excess of B -B → D (*)τ-decays, Phys. Rev. Lett. 109 (2012) 101802 [arXiv:1205.5442] [INSPIRE].
D. Becirevic, N. Kosnik and A. Tayduganov, B- → Dτ V-τ vs B- → D μv-μ, Phys. Lett. B 716 (2012) 208 [arXiv:1206.4977] [INSPIRE].
S. Fajfer, J.F. Kamenik and I. Nisandzic, On the B → D*τv-τ Sensitivity to New Physics, Phys. Rev. D 85 (2012) 094025 [arXiv:1203.2654] [INSPIRE].
V.G. Luth, Semileptonic B Decays, in the proceedings of the 10th conference on flavor physics and CP violation (FPCP 2012), May 21-25, Hefei, Anhui, China (2012), arXiv:1209.4674 [INSPIRE].
A. Celis, M. Jung, X.-Q. Li and A. Pich, Sensitivity to charged scalars in B → D(*)τvτ and B → τvτ decays, JHEP 01 (2013) 054 [arXiv:1210.8443] [INSPIRE].
C. Schwanda, Recent results from heavy flavour experiments, talk given at Portoro?z 2013: probing the Standard Model and New Physics at Low and High Energies, April 14-18, Portoro?z, Slovenia (2013).
BaBar collaboration, J. Lees et al., Measurement of an excess of B → D (*)τv decays and implications for charged Higgs bosons, Phys. Rev. D 88 (2013) 072012 [arXiv:1303.0571] [INSPIRE].
BaBar collaboration, B. Aubert et al., Measurement of |Vcb| and the form-factor slope in B- → Dl-v- decays in events tagged by a fully reconstructed B meson, Phys. Rev. Lett. 104 (2010) 011802 [arXiv:0904.4063] [INSPIRE].
G. de Divitiis, E. Molinaro, R. Petronzio and N. Tantalo, Quenched lattice calculation of the B → Dl? decay rate, Phys. Lett. B 655 (2007) 45 [arXiv:0707.0582] [INSPIRE].
S. Faller, A. Khodjamirian, C. Klein and T. Mannel, B → D(*) form factors from QCD light-cone sum rules, Eur. Phys. J. C 60 (2009) 603 [arXiv:0809.0222] [INSPIRE].
K. Azizi, QCD Sum Rules Study of the Semileptonic Bs(B ±)( B0) → Ds[1968](D0)(D±)lv Decays, Nucl. Phys. B 801 (2008) 70 [arXiv:0805.2802] [INSPIRE].
M.C. Gonzalez-Garcia and J.W.F. Valle, Fast decaying neutrinos and observable flavor violation in a new class of Majoron models, Phys. Lett. B 216 (1989) 360 [INSPIRE].
J. Casas and A. Ibarra, Oscillating neutrinos and muon → e, ?, Nucl. Phys. B 618 (2001) 171 [hep-ph/0103065] [INSPIRE].
D. Forero, S. Morisi, M. Tortola and J. Valle, Lepton flavor violation and non-unitary lepton mixing in low-scale type-I seesaw, JHEP 09 (2011) 142 [arXiv:1107.6009] [INSPIRE].
M. Malinsky, T. Ohlsson and H. Zhang, Non-unitarity effects in a realistic low-scale seesaw model, Phys. Rev. D 79 (2009) 073009 [arXiv:0903.1961] [INSPIRE].
P.S.B. Dev and R.N. Mohapatra, TeV scale inverse seesaw in SO(10) and leptonic non-unitarity effects, Phys. Rev. D 81 (2010) 013001 [arXiv:0910.3924] [INSPIRE].
V. Cirigliano, S. Gardner and B. Holstein, Beta decays and non-standard interactions in the LHC era, Prog. Part. Nucl. Phys. 71 (2013) 93 [arXiv:1303.6953] [INSPIRE].
A. Masiero, P. Paradisi and R. Petronzio, Probing new physics through μ-e universality in K → l?, Phys. Rev. D 74 (2006) 011701 [hep-ph/0511289] [INSPIRE].
M.J. Ramsey-Musolf, S. Su and S. Tulin, Pion leptonic decays and supersymmetry, Phys. Rev. D 76 (2007) 095017 [arXiv:0705.0028] [INSPIRE].
A. Masiero, P. Paradisi and R. Petronzio, Anatomy and phenomenology of the lepton flavor universality in SUSY theories, JHEP 11 (2008) 042 [arXiv:0807.4721] [INSPIRE].
J. Ellis, S. Lola and M. Raidal, Supersymmetric grand unification and lepton universality in K → l? decays, Nucl. Phys. B 812 (2009) 128 [arXiv:0809.5211] [INSPIRE].
J. Girrbach and U. Nierste, (K → Ee)(K → ev) in the Minimal Supersymmetric Standard Model, arXiv:1202.4906 [INSPIRE].
R. Fonseca, J. Romao and A. Teixeira, Revisiting the Revisiting the (K → ev)(K → μv) ratio in supersymmetric unified models, Eur. Phys. J. C 72 (2012) 2228 [arXiv:1205.1411] [INSPIRE].
B. Wang et al., Testing lepton flavor universality in terms of BESIII and charm-tau factory data, Chin. Phys. C 37 (2013) 073101 [INSPIRE].
M. Atoui, B. Blossier, V. Morénas, O. Pène and K. Petrov, Semileptonic B → D-decays in Lattice QCD : a feasibility study and first results, arXiv:1312.2914 [INSPIRE].
