Abstract
Recent measurements of RD∗ have reduced tension with the Standard Model prediction. Taking all the present data into account, we obtain the values of the Wilson coefficients of each new physics four-fermion operator of a given Lorentz structure. We find that the combined data rule out most of the solutions based on scalar/pseudoscalar operators. By studying the inter-relations between different solutions, we find that there are only four allowed solutions, which are based on operators with (V − A), linear combination of (V − A) and (V + A), tensor and linear combination of scalar/pseudoscalar and tensor structure. We demonstrate that the need for new physics is driven by those measurement of RD and RD∗ where the τ lepton is not studied. Further, we show that new physics only in \( b\to c\ \mu \overline{\nu} \) is not compatible with the full set of observables in the decays \( B\to Dl\overline{\nu} \) and \( B\to {D}^{\ast }l\overline{\nu} \).
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
BaBar collaboration, J.P. Lees et al., Evidence for an excess of \( \overline{B}\to {D}^{\left(\ast \right)}\tau -{\overline{\nu}}_{\tau } \) decays, Phys. Rev. Lett. 109 (2012) 101802 [arXiv:1205.5442] [INSPIRE].
BaBar collaboration, J.P. Lees et al., Measurement of an Excess of \( \overline{B}\to {D}^{\left(\ast \right)}\tau -{\overline{\nu}}_{\tau } \) Decays and Implications for Charged Higgs Bosons, Phys. Rev. D 88 (2013) 072012 [arXiv:1303.0571] [INSPIRE].
Belle collaboration, M. Huschle et al., Measurement of the branching ratio of \( \overline{B}\to {D}^{\left(\ast \right)}\tau -{\overline{\nu}}_{\tau } \) relative to \( \overline{B}\to {D}^{\left(\ast \right)}\ell -{\overline{\nu}}_{\ell } \) decays with hadronic tagging at Belle, Phys. Rev. D 92 (2015) 072014 [arXiv:1507.03233] [INSPIRE].
Belle collaboration, Y. Sato et al., Measurement of the branching ratio of \( {\overline{B}}^0\to {D}^{\ast +}\tau -{\overline{\nu}}_{\tau } \) relative to \( {\overline{B}}^0\to {D}^{\ast +}\ell -{\overline{\nu}}_{\ell } \) decays with a semileptonic tagging method, Phys. Rev. D 94 (2016) 072007 [arXiv:1607.07923] [INSPIRE].
Belle collaboration, S. Hirose et al., Measurement of the τ lepton polarization and R(D ∗) in the decay \( \overline{B}\to {D}^{\ast \tau }-{\overline{\nu}}_{\tau } \), Phys. Rev. Lett. 118 (2017) 211801 [arXiv:1612.00529] [INSPIRE].
LHCb collaboration, Measurement of the ratio of branching fractions \( \mathrm{\mathcal{B}}\left({\overline{B}}^0\to {D}^{\ast +}{\tau}^{-}{\nu}_{\tau}\right)/\mathrm{\mathcal{B}}\left({\overline{B}}^0\to {D}^{\ast +}{\mu}^{-}{\nu}_{\mu}\right) \), Phys. Rev. Lett. 115 (2015) 111803 [Erratum ibid. 115 (2015) 159901] [arXiv:1506.08614] [INSPIRE].
LHCb collaboration, Measurement of the ratio of the B 0 → D ∗− τ + ν τ and B 0 → D ∗− μ + ν μ branching fractions using three-prong τ -lepton decays, Phys. Rev. Lett. 120 (2018) 171802 [arXiv:1708.08856] [INSPIRE].
LHCb collaboration, Test of Lepton Flavor Universality by the measurement of the B 0 → D ∗− τ + ν τ branching fraction using three-prong τ decays, Phys. Rev. D 97 (2018) 072013 [arXiv:1711.02505] [INSPIRE].
S. Aoki et al., Review of lattice results concerning low-energy particle physics, Eur. Phys. J. C 77 (2017) 112 [arXiv:1607.00299] [INSPIRE].
S. Fajfer, J.F. Kamenik and I. Nisandzic, On the \( B\to {D}^{\ast}\tau {\overline{\nu}}_{\tau } \) Sensitivity to New Physics, Phys. Rev. D 85 (2012) 094025 [arXiv:1203.2654] [INSPIRE].
http://www.slac.stanford.edu/xorg/hfag/semi/fpcp17/RDRDs.html.
D. Bigi and P. Gambino, Revisiting B → Dℓν, Phys. Rev. D 94 (2016) 094008 [arXiv:1606.08030] [INSPIRE].
F.U. Bernlochner, Z. Ligeti, M. Papucci and D.J. Robinson, Combined analysis of semileptonic B decays to D and D ∗ : R(D (∗)), |V cb| and new physics, Phys. Rev. D 95 (2017) 115008 [Erratum ibid. D 97 (2018) 059902] [arXiv:1703.05330] [INSPIRE].
D. Bigi, P. Gambino and S. Schacht, R(D ∗), |V cb| and the Heavy Quark Symmetry relations between form factors, JHEP 11 (2017) 061 [arXiv:1707.09509] [INSPIRE].
S. Jaiswal, S. Nandi and S.K. Patra, Extraction of |V cb| from B → D (∗) ℓν ℓ and the Standard Model predictions of R(D (∗)), JHEP 12 (2017) 060 [arXiv:1707.09977] [INSPIRE].
S. de Boer, T. Kitahara and I. Nisandzic, Soft-Photon Corrections to \( \overline{B}\to D{\tau}^{-}{\overline{\nu}}_{\tau } \) Relative to \( B\to D{\mu}^{-}{\overline{\nu}}_{\mu } \), Phys. Rev. Lett. 120 (2018) 261804 [arXiv:1803.05881] [INSPIRE].
M. Tanaka and R. Watanabe, New physics in the weak interaction of \( \overline{B}\to {D}^{\left(\ast \right)}\tau \overline{\nu} \), Phys. Rev. D 87 (2013) 034028 [arXiv:1212.1878] [INSPIRE].
LHCb collaboration, Measurement of the ratio of branching fractions ℬ(B + c → J/ψτ + ν τ)/ℬ(B + c → J/ψμ + ν μ), LHCb-PAPER-2017-035 (2017).
R. Dutta and A. Bhol, B c → (J/ψ, η c)τ ν semileptonic decays within the standard model and beyond, Phys. Rev. D 96 (2017) 076001 [arXiv:1701.08598] [INSPIRE].
S. Fajfer, J.F. Kamenik, I. Nisandzic and J. Zupan, Implications of Lepton Flavor Universality Violations in B Decays, Phys. Rev. Lett. 109 (2012) 161801 [arXiv:1206.1872] [INSPIRE].
R. Alonso, B. Grinstein and J. Martin Camalich, Lepton universality violation and lepton flavor conservation in B-meson decays, JHEP 10 (2015) 184 [arXiv:1505.05164] [INSPIRE].
M.A. Ivanov, J.G. Körner and C.-T. Tran, Probing new physics in \( {B}^0\to {D}^{\left(\ast \right)}{\tau}^{-}{\overline{\nu}}_{\tau } \) using the longitudinal, transverse and normal polarization components of the tau lepton, Phys. Rev. D 95 (2017) 036021 [arXiv:1701.02937] [INSPIRE].
A. Datta, M. Duraisamy and D. Ghosh, Diagnosing New Physics in b → c τ ν τ decays in the light of the recent BaBar result, Phys. Rev. D 86 (2012) 034027 [arXiv:1206.3760] [INSPIRE].
P. Biancofiore, P. Colangelo and F. De Fazio, On the anomalous enhancement observed in \( B\to {D}^{\left(\ast \right)}\tau {\overline{\nu}}_{\tau } \) decays, Phys. Rev. D 87 (2013) 074010 [arXiv:1302.1042] [INSPIRE].
M. Duraisamy and A. Datta, The Full B → D ∗ τ − ν¯ τ Angular Distribution and CP-violating Triple Products, JHEP 09 (2013) 059 [arXiv:1302.7031] [INSPIRE].
M. Duraisamy, P. Sharma and A. Datta, Azimuthal B → D ∗ τ − ν¯τ angular distribution with tensor operators, Phys. Rev. D 90 (2014) 074013 [arXiv:1405.3719] [INSPIRE].
Y. Sakaki, M. Tanaka, A. Tayduganov and R. Watanabe, Probing New Physics with q 2 distributions in \( \overline{B}\to {D}^{\left(\ast \right)}\tau \overline{\nu} \), Phys. Rev. D 91 (2015) 114028 [arXiv:1412.3761] [INSPIRE].
M. Freytsis, Z. Ligeti and J.T. Ruderman, Flavor models for \( \overline{B}\to {D}^{\left(\ast \right)}\tau \overline{\nu} \), Phys. Rev. D 92 (2015) 054018 [arXiv:1506.08896] [INSPIRE].
D. Becirevic, S. Fajfer, I. Nisandzic and A. Tayduganov, Angular distributions of \( \overline{B}\to {D}^{\left(\ast \right)}\ell {\overline{\nu}}_{\ell } \) decays and search of New Physics, arXiv:1602.03030 [INSPIRE].
R. Alonso, A. Kobach and J. Martin Camalich, New physics in the kinematic distributions of \( \overline{B}\to {D}^{\left(\ast \right)}{\tau}^{-}\left(\to \ell -{\overline{\nu}}_{\ell }{\nu}_{\tau}\right){\overline{\nu}}_{\tau } \), Phys. Rev. D 94 (2016) 094021 [arXiv:1602.07671] [INSPIRE].
A.K. Alok, D. Kumar, S. Kumbhakar and S.U. Sankar, D ∗ polarization as a probe to discriminate new physics in \( \overline{B}\to {D}^{\ast}\tau \overline{\nu} \), Phys. Rev. D 95 (2017) 115038 [arXiv:1606.03164] [INSPIRE].
M.A. Ivanov, J.G. Körner and C.-T. Tran, Analyzing new physics in the decays \( {\overline{B}}^0\to {D}^{\left(\ast \right)}\tau -{\overline{\nu}}_{\tau } \) with form factors obtained from the covariant quark model, Phys. Rev. D 94 (2016) 094028 [arXiv:1607.02932] [INSPIRE].
Z. Ligeti, M. Papucci and D.J. Robinson, New Physics in the Visible Final States of B→D (∗) τν, JHEP 01 (2017) 083 [arXiv:1610.02045] [INSPIRE].
D. Bardhan, P. Byakti and D. Ghosh, A closer look at the R D and R D∗ anomalies, JHEP 01 (2017) 125 [arXiv:1610.03038] [INSPIRE].
C.S. Kim, G. Lopez-Castro, S.L. Tostado and A. Vicente, Remarks on the Standard Model predictions for R(D) and R(D ∗), Phys. Rev. D 95 (2017) 013003 [arXiv:1610.04190] [INSPIRE].
R. Dutta and A. Bhol, b → (c, , u), τ ν leptonic and semileptonic decays within an effective field theory approach, Phys. Rev. D 96 (2017) 036012 [arXiv:1611.00231] [INSPIRE].
S. Bhattacharya, S. Nandi and S.K. Patra, Looking for possible new physics in B → D (∗) τ ν τ in light of recent data, Phys. Rev. D 95 (2017) 075012 [arXiv:1611.04605] [INSPIRE].
R. Alonso, B. Grinstein and J. Martin Camalich, Lifetime of B − c Constrains Explanations for Anomalies in B → D (∗) τ ν, Phys. Rev. Lett. 118 (2017) 081802 [arXiv:1611.06676] [INSPIRE].
R. Alonso, J. Martin Camalich and S. Westhoff, Tau properties in B → Dτ ν from visible final-state kinematics, Phys. Rev. D 95 (2017) 093006 [arXiv:1702.02773] [INSPIRE].
M. Jung and D.M. Straub, Constraining new physics in b → cℓν transitions, arXiv:1801.01112 [INSPIRE].
P. Colangelo and F. De Fazio, Scrutinizing \( \overline{B}\to {D}^{\ast}\left(D\pi \right){\ell}^{-}{\overline{\nu}}_{\ell } \) and \( \overline{B}\to {D}^{\ast}\left(D\gamma \right){\ell}^{-}{\overline{\nu}}_{\ell } \) in search of new physics footprints, JHEP 06 (2018) 082 [arXiv:1801.10468] [INSPIRE].
Y. Sakaki, M. Tanaka, A. Tayduganov and R. Watanabe, Testing leptoquark models in \( \overline{B}\to {D}^{\left(\ast \right)}\tau \overline{\nu} \), Phys. Rev. D 88 (2013) 094012 [arXiv:1309.0301] [INSPIRE].
S. Fajfer and N. Košnik, Vector leptoquark resolution of R K and \( {R}_{D^{\left(\ast \right)}} \) puzzles, Phys. Lett. B 755 (2016) 270 [arXiv:1511.06024] [INSPIRE].
M. Bauer and M. Neubert, Minimal Leptoquark Explanation for the \( {R}_{D^{\left(\ast \right)}} \) , R K and (g − 2)g Anomalies, Phys. Rev. Lett. 116 (2016) 141802 [arXiv:1511.01900] [INSPIRE].
R. Barbieri, G. Isidori, A. Pattori and F. Senia, Anomalies in B-decays and U(2) flavour symmetry, Eur. Phys. J. C 76 (2016) 67 [arXiv:1512.01560] [INSPIRE].
I. Doršner, S. Fajfer, A. Greljo, J.F. Kamenik and N. Košnik, Physics of leptoquarks in precision experiments and at particle colliders, Phys. Rept. 641 (2016) 1 [arXiv:1603.04993] [INSPIRE].
X.-Q. Li, Y.-D. Yang and X. Zhang, Revisiting the one leptoquark solution to the \( {R}_{D^{\left(\ast \right)}} \) anomalies and its phenomenological implications, JHEP 08 (2016) 054 [arXiv:1605.09308] [INSPIRE].
S. Sahoo, R. Mohanta and A.K. Giri, Explaining the R K and \( {R}_{D^{\left(\ast \right)}} \) anomalies with vector leptoquarks, Phys. Rev. D 95 (2017) 035027 [arXiv:1609.04367] [INSPIRE].
B. Bhattacharya, A. Datta, J.-P. Guévin, D. London and R. Watanabe, Simultaneous Explanation of the R K and \( {R}_{D^{\left(\ast \right)}} \) Puzzles: a Model Analysis, JHEP 01 (2017) 015 [arXiv:1609.09078] [INSPIRE].
R. Barbieri, C.W. Murphy and F. Senia, B-decay Anomalies in a Composite Leptoquark Model, Eur. Phys. J. C 77 (2017) 8 [arXiv:1611.04930] [INSPIRE].
C.-H. Chen, T. Nomura and H. Okada, Excesses of muon g − 2, \( {R}_{D^{\left(\ast \right)}} \) and R K in a leptoquark model, Phys. Lett. B 774 (2017) 456 [arXiv:1703.03251] [INSPIRE].
A. Crivellin, D. Müller and T. Ota, Simultaneous explanation of \( {R}_{D^{\left(\ast \right)}} \) and b → sμ + μ − : the last scalar leptoquarks standing, JHEP 09 (2017) 040 [arXiv:1703.09226] [INSPIRE].
A.K. Alok, D. Kumar, J. Kumar and R. Sharma, Lepton flavor non-universality in the B-sector: a global analyses of various new physics models, arXiv:1704.07347 [INSPIRE].
L. Calibbi, A. Crivellin and T. Li, A model of vector leptoquarks in view of the B-physics anomalies, arXiv:1709.00692 [INSPIRE].
A. Crivellin, C. Greub and A. Kokulu, Explaining B → Dτ ν, B → D ∗ τ ν and B → τ ν in a 2HDM of type-III, Phys. Rev. D 86 (2012) 054014 [arXiv:1206.2634] [INSPIRE].
A. Celis, M. Jung, X.-Q. Li and A. Pich, Sensitivity to charged scalars in B → D (∗) τ ν τ and B→τν τ decays, JHEP 01 (2013) 054 [arXiv:1210.8443] [INSPIRE].
A. Crivellin, J. Heeck and P. Stoffer, A perturbed lepton-specific two-Higgs-doublet model facing experimental hints for physics beyond the Standard Model, Phys. Rev. Lett. 116 (2016) 081801 [arXiv:1507.07567] [INSPIRE].
L. Wang, J.M. Yang and Y. Zhang, Probing a pseudoscalar at the LHC in light of \( {R}_{D^{\left(\ast \right)}} \) and muon g-2 excesses, Nucl. Phys. B 924 (2017) 47 [arXiv:1610.05681] [INSPIRE].
A. Celis, M. Jung, X.-Q. Li and A. Pich, Scalar contributions to b → c(u)τ ν transitions, Phys. Lett. B 771 (2017) 168 [arXiv:1612.07757] [INSPIRE].
P. Ko, Y. Omura, Y. Shigekami and C. Yu, LHCb anomaly and B physics in flavored Z’ models with flavored Higgs doublets, Phys. Rev. D 95 (2017) 115040 [arXiv:1702.08666] [INSPIRE].
S. Iguro and K. Tobe, R(D (∗)) in a general two Higgs doublet model, Nucl. Phys. B 925 (2017) 560 [arXiv:1708.06176] [INSPIRE].
A. Biswas, D.K. Ghosh, A. Shaw and S.K. Patra, b → cℓν anomalies in light of extended scalar sectors, arXiv:1801.03375 [INSPIRE].
R. Martinez, C.F. Sierra and G. Valencia, Beyond ℛ(D (∗)) with the general 2HDM-III for b→cτν, arXiv:1805.04098[INSPIRE].
A. Greljo, G. Isidori and D. Marzocca, On the breaking of Lepton Flavor Universality in B decays, JHEP 07 (2015) 142 [arXiv:1506.01705] [INSPIRE].
S.M. Boucenna, A. Celis, J. Fuentes-Martin, A. Vicente and J. Virto, Non-abelian gauge extensions for B-decay anomalies, Phys. Lett. B 760 (2016) 214 [arXiv:1604.03088] [INSPIRE].
S. Matsuzaki, K. Nishiwaki and R. Watanabe, Phenomenology of flavorful composite vector bosons in light of B anomalies, JHEP 08 (2017) 145 [arXiv:1706.01463] [INSPIRE].
P. Asadi, M.R. Buckley and D. Shih, It’s all right(-handed neutrinos): a new W ′ model for the \( {R}_{D^{\left(\ast \right)}} \) anomaly, JHEP 09 (2018) 010 [arXiv:1804.04135] [INSPIRE].
D. Das, C. Hati, G. Kumar and N. Mahajan, Towards a unified explanation of \( {R}_{D^{\left(\ast \right)}} \) , R K and (g − 2)μ anomalies in a left-right model with leptoquarks, Phys. Rev. D 94 (2016) 055034 [arXiv:1605.06313] [INSPIRE].
N.G. Deshpande and X.-G. He, Consequences of R-parity violating interactions for anomalies in \( \overline{B}\to {D}^{\left(\ast \right)}\tau \overline{\nu} \) and b → sμ+μ−, Eur. Phys. J. C 77 (2017) 134 [arXiv:1608.04817] [INSPIRE].
G. Cvetič, F. Halzen, C.S. Kim and S. Oh, Anomalies in (semi)-leptonic B decays B ± → τ ± ν, B ± → Dτ ± ν and B ± → D ∗ τ ± ν and possible resolution with sterile neutrino, Chin. Phys. C 41 (2017) 113102 [arXiv:1702.04335] [INSPIRE].
D. Aloni, A. Efrati, Y. Grossman and Y. Nir, ϒ and ψ leptonic decays as probes of solutions to the \( {R}_{{}^D}^{\left(\ast \right)} \) puzzle, JHEP 06 (2017) 019 [arXiv:1702.07356] [INSPIRE].
E. Megias, M. Quirós and L. Salas, Lepton-flavor universality violation in R K and \( {R}_{D^{\left(\ast \right)}} \) from warped space, JHEP 07 (2017) 102 [arXiv:1703.06019] [INSPIRE].
W. Altmannshofer, P. Bhupal Dev and A. Soni, \( {R}_{D^{\left(\ast \right)}} \) anomaly: A possible hint for natural supersymmetry with R-parity violation, Phys. Rev. D 96 (2017) 095010 [arXiv:1704.06659] [INSPIRE].
F. Feruglio, P. Paradisi and A. Pattori, On the Importance of Electroweak Corrections for B Anomalies, JHEP 09 (2017) 061 [arXiv:1705.00929] [INSPIRE].
D. Choudhury, A. Kundu, R. Mandal and R. Sinha, Minimal unified resolution to \( {R}_{K^{\left(\ast \right)}} \) and R(D (∗)) anomalies with lepton mixing, Phys. Rev. Lett. 119 (2017) 151801 [arXiv:1706.08437] [INSPIRE].
J.M. Cline and J. Martin Camalich, B decay anomalies from nonabelian local horizontal symmetry, Phys. Rev. D 96 (2017) 055036 [arXiv:1706.08510] [INSPIRE].
R. Watanabe, New Physics effect on \( {B}_c\to J/\psi \tau \overline{\nu} \) in relation to the \( {R}_{D^{\left(\ast \right)}} \) anomaly, Phys. Lett. B 776 (2018) 5 [arXiv:1709.08644] [INSPIRE].
B. Chauhan and B. Kindra, Invoking Chiral Vector Leptoquark to explain LFU violation in B Decays, arXiv:1709.09989 [INSPIRE].
R. Dutta, Exploring R D , R D∗ and R J/Ψ anomalies, arXiv:1710.00351 [INSPIRE].
C.-T. Tran, M.A. Ivanov, J.G. Körner and P. Santorelli, Implications of new physics in the decays B c → (J/ψ, η c)τ ν, Phys. Rev. D 97 (2018) 054014 [arXiv:1801.06927] [INSPIRE].
J. Zhu, B. Wei, J.-H. Sheng, R.-M. Wang, Y. Gao and G.-R. Lu, Probing the R-parity violating supersymmetric effects in \( {B}_c\to J/\psi {\ell}^{-}{\nu}_{\ell },\ {\eta}_c{\ell}^{-}{\overline{\nu}}_{\ell } \) and \( {\varLambda}_b\to {\varLambda}_c{\ell}^{-}{\overline{\nu}}_{\ell } \) decays, Nucl. Phys. B 934 (2018) 380 [arXiv:1801.00917] [INSPIRE].
Z. Rui, J. Zhang and L.-L. Zhang, Semileptonic decays of B c meson to P -wave charmonium states, Phys. Rev. D 98 (2018) 033007 [arXiv:1806.00796] [INSPIRE].
A. Greljo, D.J. Robinson, B. Shakya and J. Zupan, R(D (∗)) from W ′ and right-handed neutrinos, arXiv:1804.04642 [INSPIRE].
D. Robinson, B. Shakya and J. Zupan, Right-handed Neutrinos and R(D (∗)), arXiv:1807.04753 [INSPIRE].
S. Davidson, D.C. Bailey and B.A. Campbell, Model independent constraints on leptoquarks from rare processes, Z. Phys. C 61 (1994) 613 [hep-ph/9309310] [INSPIRE].
S. Davidson and S. Descotes-Genon, Minimal Flavour Violation for Leptoquarks, JHEP 11 (2010) 073 [arXiv:1009.1998] [INSPIRE].
I. Caprini, L. Lellouch and M. Neubert, Dispersive bounds on the shape of \( \overline{B}\to {D}^{\left(\ast \right)} \) lepton anti-neutrino form-factors, Nucl. Phys. B 530 (1998) 153 [hep-ph/9712417] [INSPIRE].
Fermilab Lattice and MILC collaborations, J.A. Bailey et al., Update of |V cb| from the \( \overline{B}\to {D}^{\ast}\ell \overline{\nu} \) form factor at zero recoil with three-flavor lattice QCD, Phys. Rev. D 89 (2014) 114504 [arXiv:1403.0635] [INSPIRE].
HFLAV collaboration, Y. Amhis et al., Averages of b-hadron, c-hadron and τ -lepton properties as of summer 2016, Eur. Phys. J. C 77 (2017) 895 [arXiv:1612.07233] [INSPIRE].
F. James and M. Roos, Minuit: A System for Function Minimization and Analysis of the Parameter Errors and Correlations, Comput. Phys. Commun. 10 (1975) 343 [INSPIRE].
F. James, MINUIT Function Minimization and Error Analysis: Reference Manual Version 94.1, CERN-D-506 [INSPIRE]
W.-F. Wang, Y.-Y. Fan and Z.-J. Xiao, Semileptonic decays B c → (η c , J/Ψ)lν in the perturbative QCD approach, Chin. Phys. C 37 (2013) 093102 [arXiv:1212.5903] [INSPIRE].
HPQCD collaboration, B. Colquhoun et al., B-meson decay constants: a more complete picture from full lattice QCD, Phys. Rev. D 91 (2015) 114509 [arXiv:1503.05762] [INSPIRE].
Particle Data Group collaboration, C. Patrignani et al., Review of Particle Physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
A.G. Akeroyd and C.-H. Chen, Constraint on the branching ratio of \( {B}_c\to \tau \overline{\nu} \) from LEP1 and consequences for R(D (∗)) anomaly, Phys. Rev. D 96 (2017) 075011 [arXiv:1708.04072] [INSPIRE].
Belle collaboration, R. Glattauer et al., Measurement of the decay B → Dℓν ℓ in fully reconstructed events and determination of the Cabibbo-Kobayashi-Maskawa matrix element |V cb|, Phys. Rev. D 93 (2016) 032006 [arXiv:1510.03657] [INSPIRE].
Belle collaboration, A. Abdesselam et al., Precise determination of the CKM matrix element |V cb| with \( {\overline{B}}^0\to {D}^{\ast +}{\ell}^{-}{\overline{\nu}}_{\ell } \) decays with hadronic tagging at Belle, arXiv:1702.01521 [INSPIRE].
A.K. Alok, D. Kumar, S. Kumbhakar and S. Uma Sankar, Resolution of R D /R D∗ puzzle, Phys. Lett. B 784 (2018) 16 [arXiv:1804.08078] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1710.04127
Rights and permissions
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.
The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.
About this article
Cite this article
Alok, A.K., Kumar, D., Kumar, J. et al. New physics solutions for RD and RD∗. J. High Energ. Phys. 2018, 152 (2018). https://doi.org/10.1007/JHEP09(2018)152
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP09(2018)152