Abstract
In \( {B}_c^{-} \) → J/ψ(→ μ+μ−)τ−\( {\overline{\nu}}_{\tau } \) decay, the three-momentum \( {\boldsymbol{p}}_{\tau^{-}} \) cannot be determined accurately due to the decay products of τ− inevitably include an undetected ντ. As a consequence, the angular distribution of this decay cannot be measured. In this work, we construct a measurable angular distribution by considering the subsequent decay τ− → π−ντ. The full cascade decay is \( {B}_c^{-} \) → J/ψ(→ μ+μ−)τ−(→ π−ντ)\( {\overline{\nu}}_{\tau } \), in which the three-momenta \( {\boldsymbol{p}}_{\mu^{+}},{\boldsymbol{p}}_{\mu^{-}} \), and \( {\boldsymbol{p}}_{\pi^{-}} \) can be measured. The five-fold differential angular distribution containing all Lorentz structures of the new physics (NP) effective operators can be written in terms of twelve angular observables ℐi(q2, Eπ). Integrating over the energy of pion Eπ, we construct twelve normalized angular observables \( {\hat{\mathrm{\mathcal{I}}}}_i \)(q2) and two lepton-flavor-universality ratios \( R\left({P}_{L,T}^{J/\psi}\right) \)(q2). Based on the Bc → J/ψ form factors calculated by the latest lattice QCD and sum rule, we predict the q2 distribution of all \( {\hat{\mathrm{\mathcal{I}}}}_i \) and \( R\left({P}_{L,T}^{J/\psi}\right) \) both within the Standard Model and in eight NP benchmark points. We find that the benchmark BP2 (corresponding to the hypothesis of tensor operator) has the greatest effect on all ℐi and \( R\left({P}_{L,T}^{J/\psi}\right) \), except \( {\hat{\mathrm{\mathcal{I}}}}_5 \). The ratios \( R\left({P}_{L,T}^{J/\psi}\right) \) are more sensitive to the NP with pseudo-scalar operators than the ℐi. Finally, we discuss the symmetries in the angular observables and present a model-independent method to determine the existence of tensor operators.
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References
ATLAS collaboration, Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC, Phys. Lett. B 716 (2012) 1 [arXiv:1207.7214] [INSPIRE].
CMS collaboration, Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE].
ATLAS and CMS collaborations, Combined measurement of the Higgs boson mass in pp collisions at \( \sqrt{s} \) = 7 and 8 TeV with the ATLAS and CMS experiments, Phys. Rev. Lett. 114 (2015) 191803 [arXiv:1503.07589] [INSPIRE].
BaBar collaboration, 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, 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].
LHCb collaboration, Measurement of the ratio of branching fractions \( \mathrm{\mathcal{B}}\left({\overline{B}}^0\to {D}^{\ast +}{\tau}^{-}{\overline{\nu}}_{\tau}\right)/\mathrm{\mathcal{B}}\left({\overline{B}}^0\to {D}^{\ast +}{\mu}^{-}{\overline{\nu}}_{\mu}\right) \), Phys. Rev. Lett. 115 (2015) 111803 [Erratum ibid. 115 (2015) 159901] [arXiv:1506.08614] [INSPIRE].
Belle collaboration, Measurement of the branching ratio of \( \overline{B}\to {D}^{\left(\ast \right)}{\tau}^{-}{\overline{\nu}}_{\tau } \) relative to \( \overline{B}\to {D}^{\left(\ast \right)}{\mathrm{\ell}}^{-}{\overline{\nu}}_{\mathrm{\ell}} \) decays with hadronic tagging at Belle, Phys. Rev. D 92 (2015) 072014 [arXiv:1507.03233] [INSPIRE].
Belle collaboration, 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 the B0 → D*−τ+ντ and B0 → D*−μ+νμ branching fractions using three-prong τ-lepton decays, Phys. Rev. Lett. 120 (2018) 171802 [arXiv:1708.08856] [INSPIRE].
Belle collaboration, Measurement of the τ lepton polarization and R(D*) in the decay \( \overline{B}\to {D}^{\ast }{\tau}^{-}{\overline{\nu}}_{\tau } \) with one-prong hadronic τ decays at Belle, Phys. Rev. D 97 (2018) 012004 [arXiv:1709.00129] [INSPIRE].
LHCb collaboration, Test of lepton flavor universality by the measurement of the B0 → D*−τ+ντ branching fraction using three-prong τ decays, Phys. Rev. D 97 (2018) 072013 [arXiv:1711.02505] [INSPIRE].
Belle collaboration, Measurement of \( \mathrm{\mathcal{R}} \)(D) and \( \mathrm{\mathcal{R}} \)(D*) with a semileptonic tagging method, Phys. Rev. Lett. 124 (2020) 161803 [arXiv:1910.05864] [INSPIRE].
HFLAV collaboration, Averages of b-hadron, c-hadron, and τ-lepton properties as of 2018, Eur. Phys. J. C 81 (2021) 226 [arXiv:1909.12524] [INSPIRE].
HFLAV collaboration, Online update for averages of RD and \( {R}_{D^{\ast }} \) for Spring 2019, https://hflav-eos.web.cern.ch/hflav-eos/semi/spring19/html/RDsDsstar/RDRDs.html.
M. Bordone, M. Jung and D. van Dyk, Theory determination of \( \overline{B}\to {D}^{\left(\ast \right)}{\mathrm{\ell}}^{-}\overline{\nu} \) form factors at \( \mathcal{O}\left(1/{m}_c^2\right) \), Eur. Phys. J. C 80 (2020) 74 [arXiv:1908.09398] [INSPIRE].
F.U. Bernlochner, M.F. Sevilla, D.J. Robinson and G. Wormser, Semitauonic b-hadron decays: a lepton flavor universality laboratory, arXiv:2101.08326 [INSPIRE].
A.K. Alok, D. Kumar, J. Kumar, S. Kumbhakar and S.U. Sankar, New physics solutions for RD and \( {R}_{D^{\ast }} \), JHEP 09 (2018) 152 [arXiv:1710.04127] [INSPIRE].
Q.-Y. Hu, X.-Q. Li and Y.-D. Yang, b → cτν transitions in the Standard Model effective field theory, Eur. Phys. J. C 79 (2019) 264 [arXiv:1810.04939] [INSPIRE].
A.K. Alok, D. Kumar, S. Kumbhakar and S. Uma Sankar, Solutions to RD-\( {R}_{D^{\ast }} \) in light of Belle 2019 data, Nucl. Phys. B 953 (2020) 114957 [arXiv:1903.10486] [INSPIRE].
C. Murgui, A. Peñuelas, M. Jung and A. Pich, Global fit to b → cτν transitions, JHEP 09 (2019) 103 [arXiv:1904.09311] [INSPIRE].
M. Blanke et al., Impact of polarization observables and Bc → τν on new physics explanations of the b → cτν anomaly, Phys. Rev. D 99 (2019) 075006 [arXiv:1811.09603] [INSPIRE].
M. Blanke, A. Crivellin, T. Kitahara, M. Moscati, U. Nierste and I. Nišandžić, Addendum to “impact of polarization observables and Bc → τν on new physics explanations of the b → cτν anomaly”, Phys. Rev. D 100 (2019) 035035 [arXiv:1905.08253] [INSPIRE].
R.-X. Shi, L.-S. Geng, B. Grinstein, S. Jäger and J. Martin Camalich, Revisiting the new-physics interpretation of the b → cτν data, JHEP 12 (2019) 065 [arXiv:1905.08498] [INSPIRE].
K. Cheung, Z.-R. Huang, H.-D. Li, C.-D. Lü, Y.-N. Mao and R.-Y. Tang, Revisit to the b → cτν transition: in and beyond the SM, Nucl. Phys. B 965 (2021) 115354 [arXiv:2002.07272] [INSPIRE].
S. Kumbhakar, Signatures of complex new physics in b → \( c\tau \overline{\nu} \) transitions, Nucl. Phys. B 963 (2021) 115297 [arXiv:2007.08132] [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].
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].
M. Bauer and M. Neubert, Minimal leptoquark explanation for the \( {R}_{D^{\left(\ast \right)}} \), RK, and (g − 2)μ anomalies, Phys. Rev. Lett. 116 (2016) 141802 [arXiv:1511.01900] [INSPIRE].
S. Fajfer and N. Košnik, Vector leptoquark resolution of RK and \( {R}_{D^{\left(\ast \right)}} \) puzzles, Phys. Lett. B 755 (2016) 270 [arXiv:1511.06024] [INSPIRE].
X.-Q. Li, Y.-D. Yang and X. Zhang, Revisiting the one leptoquark solution to the R(D(*)) anomalies and its phenomenological implications, JHEP 08 (2016) 054 [arXiv:1605.09308] [INSPIRE].
A. Crivellin, D. Müller and T. Ota, Simultaneous explanation of R(D(*)) and b → sμ+μ−: the last scalar leptoquarks standing, JHEP 09 (2017) 040 [arXiv:1703.09226] [INSPIRE].
D. Bečirević, I. Doršner, S. Fajfer, N. Košnik, D.A. Faroughy and O. Sumensari, Scalar leptoquarks from grand unified theories to accommodate the B-physics anomalies, Phys. Rev. D 98 (2018) 055003 [arXiv:1806.05689] [INSPIRE].
A. Angelescu, D. Bečirević, D.A. Faroughy and O. Sumensari, Closing the window on single leptoquark solutions to the B-physics anomalies, JHEP 10 (2018) 183 [arXiv:1808.08179] [INSPIRE].
S. Bansal, R.M. Capdevilla and C. Kolda, Constraining the minimal flavor violating leptoquark explanation of the \( {R}_{D^{\left(\ast \right)}} \) anomaly, Phys. Rev. D 99 (2019) 035047 [arXiv:1810.11588] [INSPIRE].
S. Iguro, T. Kitahara, Y. Omura, R. Watanabe and K. Yamamoto, D* polarization vs. \( {R}_{D^{\left(\ast \right)}} \) anomalies in the leptoquark models, JHEP 02 (2019) 194 [arXiv:1811.08899] [INSPIRE].
A. Crivellin, D. Müller and F. Saturnino, Flavor phenomenology of the leptoquark singlet-triplet model, JHEP 06 (2020) 020 [arXiv:1912.04224] [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].
W. Altmannshofer, P.S. 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].
Q.-Y. Hu, X.-Q. Li, Y. Muramatsu and Y.-D. Yang, R-parity violating solutions to the \( {R}_{D^{\left(\ast \right)}} \) anomaly and their GUT-scale unifications, Phys. Rev. D 99 (2019) 015008 [arXiv:1808.01419] [INSPIRE].
Q.-Y. Hu, Y.-D. Yang and M.-D. Zheng, Revisiting the B-physics anomalies in R-parity violating MSSM, Eur. Phys. J. C 80 (2020) 365 [arXiv:2002.09875] [INSPIRE].
W. Altmannshofer, P.S.B. Dev, A. Soni and Y. Sui, Addressing \( {R}_{D^{\left(\ast \right)}} \), \( {R}_{K^{\left(\ast \right)}} \), muon g − 2 and ANITA anomalies in a minimal R-parity violating supersymmetric framework, Phys. Rev. D 102 (2020) 015031 [arXiv:2002.12910] [INSPIRE].
A. Crivellin, C. Greub and A. Kokulu, Explaining B → Dτν, B → D*τν and B → τν 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(*)τντ and B → τντ decays, JHEP 01 (2013) 054 [arXiv:1210.8443] [INSPIRE].
P. Ko, Y. Omura and C. Yu, B → D(*)τν and B → τν in chiral U(1)′ models with flavored multi Higgs doublets, JHEP 03 (2013) 151 [arXiv:1212.4607] [INSPIRE].
A. Celis, M. Jung, X.-Q. Li and A. Pich, Scalar contributions to b → c(u)τν transitions, Phys. Lett. B 771 (2017) 168 [arXiv:1612.07757] [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].
S. Iguro and Y. Omura, Status of the semileptonic B decays and muon g − 2 in general 2HDMs with right-handed neutrinos, JHEP 05 (2018) 173 [arXiv:1802.01732] [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].
A. Greljo, D.J. Robinson, B. Shakya and J. Zupan, R(D(*)) from W′ and right-handed neutrinos, JHEP 09 (2018) 169 [arXiv:1804.04642] [INSPIRE].
K.S. Babu, B. Dutta and R.N. Mohapatra, A theory of R(D*, D) anomaly with right-handed currents, JHEP 01 (2019) 168 [arXiv:1811.04496] [INSPIRE].
M. Blanke and A. Crivellin, B meson anomalies in a Pati-Salam model within the Randall-Sundrum background, Phys. Rev. Lett. 121 (2018) 011801 [arXiv:1801.07256] [INSPIRE].
S. Iguro, J. Kawamura, S. Okawa and Y. Omura, TeV-scale vector leptoquark from Pati-Salam unification with vectorlike families, arXiv:2103.11889 [INSPIRE].
LHCb collaboration, Measurement of the ratio of branching fractions \( \mathrm{\mathcal{B}}\left({B}_c^{+}\to J/{\psi \tau}^{+}{\nu}_{\tau}\right)/\mathrm{\mathcal{B}}\left({B}_c^{+}\to J/{\psi \mu}^{+}{\nu}_{\mu}\right) \), Phys. Rev. Lett. 120 (2018) 121801 [arXiv:1711.05623] [INSPIRE].
LATTICE-HPQCD collaboration, R(J/ψ) and \( {B}_c^{-}\to J/\psi {\mathrm{\ell}}^{-}{\overline{\nu}}_{\mathrm{\ell}} \) lepton flavor universality violating observables from lattice QCD, Phys. Rev. Lett. 125 (2020) 222003 [arXiv:2007.06956] [INSPIRE].
HPQCD collaboration, Bc → J/ψ form factors for the full q2 range from lattice QCD, Phys. Rev. D 102 (2020) 094518 [arXiv:2007.06957] [INSPIRE].
R. Watanabe, New physics effect on Bc → \( J/\psi \tau \overline{\nu} \) in relation to the \( {R}_{D^{\left(\ast \right)}} \) anomaly, Phys. Lett. B 776 (2018) 5 [arXiv:1709.08644] [INSPIRE].
J. Zhu, B. Wei, J.-H. Sheng, R.-M. Wang, Y. Gao and G.-R. Lu, Probing the R-parity violating supersymmetric effects in \( {B}_c\to J/\psi {\mathrm{\ell}}^{-}{\overline{\nu}}_{\mathrm{\ell}},\eta c{\mathrm{\ell}}^{-}{\overline{\nu}}_{\mathrm{\ell}} \) and \( {\Lambda}_b\to {\Lambda}_c{\mathrm{\ell}}^{-}{\overline{\nu}}_{\mathrm{\ell}} \) decays, Nucl. Phys. B 934 (2018) 380 [arXiv:1801.00917] [INSPIRE].
C.-T. Tran, M.A. Ivanov, J.G. Körner and P. Santorelli, Implications of new physics in the decays Bc → (J/ψ, ηc)τν, Phys. Rev. D 97 (2018) 054014 [arXiv:1801.06927] [INSPIRE].
A. Issadykov and M.A. Ivanov, The decays Bc → J/ψ + \( \overline{\mathrm{\ell}}{\nu}_{\mathrm{\ell}} \) and Bc → J/ψ + π(K) in covariant confined quark model, Phys. Lett. B 783 (2018) 178 [arXiv:1804.00472] [INSPIRE].
T.D. Cohen, H. Lamm and R.F. Lebed, Tests of the standard model in B → Dℓνℓ, B → D∗ℓνℓ and Bc → J/ψℓνℓ, Phys. Rev. D 98 (2018) 034022 [arXiv:1807.00256] [INSPIRE].
T.D. Cohen, H. Lamm and R.F. Lebed, Model-independent bounds on R(J/ψ), JHEP 09 (2018) 168 [arXiv:1807.02730] [INSPIRE].
Z.-R. Huang, Y. Li, C.-D. Lu, M.A. Paracha and C. Wang, Footprints of new physics in b → cτν transitions, Phys. Rev. D 98 (2018) 095018 [arXiv:1808.03565] [INSPIRE].
W. Wang and R. Zhu, Model independent investigation of the \( {R}_{J/\psi, {\eta}_c} \) and ratios of decay widths of semileptonic Bc decays into a P-wave charmonium, Int. J. Mod. Phys. A 34 (2019) 1950195 [arXiv:1808.10830] [INSPIRE].
D. Leljak, B. Melic and M. Patra, On lepton flavour universality in semileptonic Bc → ηc, J/ψ decays, JHEP 05 (2019) 094 [arXiv:1901.08368] [INSPIRE].
X.-Q. Hu, S.-P. Jin and Z.-J. Xiao, Semileptonic decays Bc → (ηc, J/ψ)\( l{\overline{\nu}}_l \) in the “PQCD + lattice” approach, Chin. Phys. C 44 (2020) 023104 [arXiv:1904.07530] [INSPIRE].
K. Azizi, Y. Sarac and H. Sundu, Lepton flavor universality violation in semileptonic tree level weak transitions, Phys. Rev. D 99 (2019) 113004 [arXiv:1904.08267] [INSPIRE].
N. Penalva, E. Hernández and J. Nieves, \( {\overline{B}}_c \) → ηc, \( \overline{B} \) → J/ψ and \( \overline{B} \) → D(*) semileptonic decays including new physics, Phys. Rev. D 102 (2020) 096016 [arXiv:2007.12590] [INSPIRE].
A. Berns and H. Lamm, Model-independent prediction of R(ηc), JHEP 12 (2018) 114 [arXiv:1808.07360] [INSPIRE].
C.W. Murphy and A. Soni, Model-independent determination of \( {B}_c^{+} \) → ηcℓ+ν form factors, Phys. Rev. D 98 (2018) 094026 [arXiv:1808.05932] [INSPIRE].
R. Dutta, Λb → (Λc, p)τ ν decays within Standard Model and beyond, Phys. Rev. D 93 (2016) 054003 [arXiv:1512.04034] [INSPIRE].
X.-Q. Li, Y.-D. Yang and X. Zhang, Λb → \( {\Lambda}_c\tau {\overline{\nu}}_{\tau } \) decay in scalar and vector leptoquark scenarios, JHEP 02 (2017) 068 [arXiv:1611.01635] [INSPIRE].
E. Di Salvo, F. Fontanelli and Z.J. Ajaltouni, Detailed study of the decay Λb → \( {\Lambda}_c\tau {\overline{\nu}}_{\tau } \), Int. J. Mod. Phys. A 33 (2018) 1850169 [arXiv:1804.05592] [INSPIRE].
A. Ray, S. Sahoo and R. Mohanta, Probing new physics in semileptonic Λb decays, Phys. Rev. D 99 (2019) 015015 [arXiv:1812.08314] [INSPIRE].
N. Penalva, E. Hernández and J. Nieves, Further tests of lepton flavour universality from the charged lepton energy distribution in b → c semileptonic decays: the case of Λb → \( {\Lambda}_c\mathrm{\ell}{\overline{\nu}}_{\mathrm{\ell}} \), Phys. Rev. D 100 (2019) 113007 [arXiv:1908.02328] [INSPIRE].
X.-L. Mu, Y. Li, Z.-T. Zou and B. Zhu, Investigation of effects of new physics in Λb → \( {\Lambda}_c\tau {\overline{\nu}}_{\tau } \) decay, Phys. Rev. D 100 (2019) 113004 [arXiv:1909.10769] [INSPIRE].
T. Gutsche, M.A. Ivanov, J.G. Körner, V.E. Lyubovitskij, P. Santorelli and N. Habyl, Semileptonic decay Λb → Λc + τ− + \( {\overline{\nu}}_{\tau } \) in the covariant confined quark model, Phys. Rev. D 91 (2015) 074001 [Erratum ibid. 91 (2015) 119907] [arXiv:1502.04864] [INSPIRE].
S. Shivashankara, W. Wu and A. Datta, Λb → \( {\Lambda}_c\tau {\overline{\nu}}_{\tau } \) decay in the Standard Model and with new physics, Phys. Rev. D 91 (2015) 115003 [arXiv:1502.07230] [INSPIRE].
P. Böer, A. Kokulu, J.-N. Toelstede and D. van Dyk, Angular analysis of Λb → Λc (→ Λπ)\( \mathrm{\ell}\overline{\nu } \), JHEP 12 (2019) 082 [arXiv:1907.12554] [INSPIRE].
M. Ferrillo, A. Mathad, P. Owen and N. Serra, Probing effects of new physics in \( {\Lambda}_b^0\to {\Lambda}_c^{+}{\mu}^{-}{\overline{\nu}}_{\mu } \) decays, JHEP 12 (2019) 148 [arXiv:1909.04608] [INSPIRE].
Q.-Y. Hu, X.-Q. Li, Y.-D. Yang and D.-H. Zheng, The measurable angular distribution of \( {\Lambda}_b^0\to {\Lambda}_c^{+}\left(\to {\Lambda}^0{\pi}^{+}\right){\tau}^{-}\left(\to {\pi}^{-}{\upsilon}_{\tau}\right){\overline{\upsilon}}_{\tau } \) decay, JHEP 02 (2021) 183 [arXiv:2011.05912] [INSPIRE].
R. Dutta, Phenomenology of Ξb → Ξc τ ν decays, Phys. Rev. D 97 (2018) 073004 [arXiv:1801.02007] [INSPIRE].
R.N. Faustov and V.O. Galkin, Relativistic description of the Ξb baryon semileptonic decays, Phys. Rev. D 98 (2018) 093006 [arXiv:1810.03388] [INSPIRE].
J. Zhang, J. Su and Q. Zeng, Contributions of vector leptoquark to Ξb → \( {\Xi}_c\tau {\overline{\nu}}_{\tau } \) decay, Nucl. Phys. B 938 (2019) 131 [INSPIRE].
J. Zhang, X. An, R. Sun and J. Su, Probing new physics in semileptonic Ξb → Λ(Ξc)\( {\tau}^{-}{\overline{\nu}}_{\tau } \) decays, Eur. Phys. J. C 79 (2019) 863 [INSPIRE].
N. Rajeev, R. Dutta and S. Kumbhakar, Implication of \( {R}_{D^{\left(\ast \right)}} \) anomalies on semileptonic decays of Σb and Ωb baryons, Phys. Rev. D 100 (2019) 035015 [arXiv:1905.13468] [INSPIRE].
J.-H. Sheng, J. Zhu, X.-N. Li, Q.-Y. Hu and R.-M. Wang, Probing new physics in semileptonic Σb and Ωb decays, Phys. Rev. D 102 (2020) 055023 [arXiv:2009.09594] [INSPIRE].
V.V. Kiselev, A.K. Likhoded and A.I. Onishchenko, Semileptonic Bc meson decays in sum rules of QCD and NRQCD, Nucl. Phys. B 569 (2000) 473 [hep-ph/9905359] [INSPIRE].
M.A. Ivanov, J.G. Korner and P. Santorelli, The semileptonic decays of the Bc meson, Phys. Rev. D 63 (2001) 074010 [hep-ph/0007169] [INSPIRE].
D. Ebert, R.N. Faustov and V.O. Galkin, Weak decays of the Bc meson to charmonium and D mesons in the relativistic quark model, Phys. Rev. D 68 (2003) 094020 [hep-ph/0306306] [INSPIRE].
E. Hernandez, J. Nieves and J.M. Verde-Velasco, Study of exclusive semileptonic and non-leptonic decays of \( {B}_{\overline{c}} \) in a nonrelativistic quark model, Phys. Rev. D 74 (2006) 074008 [hep-ph/0607150] [INSPIRE].
M.A. Ivanov, J.G. Körner and P. Santorelli, Exclusive semileptonic and nonleptonic decays of the Bc meson, Phys. Rev. D 73 (2006) 054024 [hep-ph/0602050] [INSPIRE].
W. Wang, Y.-L. Shen and C.-D. Lu, Covariant light-front approach for Bc transition form factors, Phys. Rev. D 79 (2009) 054012 [arXiv:0811.3748] [INSPIRE].
C.-F. Qiao and R.-L. Zhu, Estimation of semileptonic decays of Bc meson to S-wave charmonia with nonrelativistic QCD, Phys. Rev. D 87 (2013) 014009 [arXiv:1208.5916] [INSPIRE].
W.-F. Wang, Y.-Y. Fan and Z.-J. Xiao, Semileptonic decays Bc → (ηc, J/Ψ)lν in the perturbative QCD approach, Chin. Phys. C 37 (2013) 093102 [arXiv:1212.5903] [INSPIRE].
Z. Rui, H. Li, G.-X. Wang and Y. Xiao, Semileptonic decays of Bc meson to S-wave charmonium states in the perturbative QCD approach, Eur. Phys. J. C 76 (2016) 564 [arXiv:1602.08918] [INSPIRE].
R. Dutta and A. Bhol, Bc → (J/ψ, ηc)τν semileptonic decays within the Standard Model and beyond, Phys. Rev. D 96 (2017) 076001 [arXiv:1701.08598] [INSPIRE].
HPQCD collaboration, Bc decays from highly improved staggered quarks and NRQCD, PoS LATTICE2016 (2016) 281 [arXiv:1611.01987] [INSPIRE].
A. Lytle, B. Colquhoun, C. Davies, J. Koponen and C. McNeile, Semileptonic Bc decays from full lattice QCD, PoS BEAUTY2016 (2016) 069 [arXiv:1605.05645] [INSPIRE].
U. Nierste, S. Trine and S. Westhoff, Charged-Higgs effects in a new B → Dτν differential decay distribution, Phys. Rev. D 78 (2008) 015006 [arXiv:0801.4938] [INSPIRE].
M. Tanaka and R. Watanabe, Tau longitudinal polarization in B → Dτν and its role in the search for charged Higgs boson, Phys. Rev. D 82 (2010) 034027 [arXiv:1005.4306] [INSPIRE].
K. Hagiwara, M.M. Nojiri and Y. Sakaki, CP violation in B → Dτντ using multipion tau decays, Phys. Rev. D 89 (2014) 094009 [arXiv:1403.5892] [INSPIRE].
M. Bordone, G. Isidori and D. van Dyk, Impact of leptonic τ decays on the distribution of B → \( P\mu \overline{\nu} \) decays, Eur. Phys. J. C 76 (2016) 360 [arXiv:1602.06143] [INSPIRE].
R. Alonso, A. Kobach and J. Martin Camalich, New physics in the kinematic distributions of \( \overline{B}\to {D}^{\left(\ast \right)}{\tau}^{-}\left(\to {\mathrm{\ell}}^{-}{\overline{\nu}}_{\mathrm{\ell}}{\nu}_{\tau}\right){\overline{\nu}}_{\tau } \), Phys. Rev. D 94 (2016) 094021 [arXiv:1602.07671] [INSPIRE].
R. Alonso, J. Martin Camalich and S. Westhoff, Tau properties in B → Dτν from visible final-state kinematics, Phys. Rev. D 95 (2017) 093006 [arXiv:1702.02773] [INSPIRE].
P. Asadi, M.R. Buckley and D. Shih, Asymmetry observables and the origin of \( {R}_{D^{\left(\ast \right)}} \) anomalies, Phys. Rev. D 99 (2019) 035015 [arXiv:1810.06597] [INSPIRE].
R. Alonso, J. Martin Camalich and S. Westhoff, Tau polarimetry in B meson decays, SciPost Phys. Proc. 1 (2019) 012 [arXiv:1811.05664] [INSPIRE].
B. Bhattacharya, A. Datta, S. Kamali and D. London, A measurable angular distribution for \( \overline{B}\to {D}^{\ast }{\tau}^{-}{\overline{\upsilon}}_{\tau } \) decays, JHEP 07 (2020) 194 [arXiv:2005.03032] [INSPIRE].
P. Asadi, A. Hallin, J. Martin Camalich, D. Shih and S. Westhoff, Complete framework for tau polarimetry in B → D(*)τν decays, Phys. Rev. D 102 (2020) 095028 [arXiv:2006.16416] [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].
R. Dutta, A. Bhol and A.K. Giri, Effective theory approach to new physics in b → u and b → c leptonic and semileptonic decays, Phys. Rev. D 88 (2013) 114023 [arXiv:1307.6653] [INSPIRE].
R. Mandal, C. Murgui, A. Peñuelas and A. Pich, The role of right-handed neutrinos in b → \( c\tau \overline{\nu} \) anomalies, JHEP 08 (2020) 022 [arXiv:2004.06726] [INSPIRE].
M. Beneke and T. Feldmann, Symmetry breaking corrections to heavy to light B meson form-factors at large recoil, Nucl. Phys. B 592 (2001) 3 [hep-ph/0008255] [INSPIRE].
K. Kiers and A. Soni, Improving constraints on tan β/mH using B → Dτ anti-neutrino, Phys. Rev. D 56 (1997) 5786 [hep-ph/9706337] [INSPIRE].
Y. Sakaki and H. Tanaka, Constraints on the charged scalar effects using the forward-backward asymmetry on B → \( {D}^{\left(\ast \right)}\tau {\overline{\nu}}_{\tau } \), Phys. Rev. D 87 (2013) 054002 [arXiv:1205.4908] [INSPIRE].
M.A. Ivanov, J.G. Körner and C.-T. Tran, Probing new physics in \( {\overline{B}}^0\to {D}^{\left(\ast \right)}{\tau}^{-}{\overline{\nu}}_{\tau } \) using the longitudinal, transverse, and normal polarization components of the tau lepton, Phys. Rev. D 95 (2017) 036021 [arXiv:1701.02937] [INSPIRE].
R. Alonso, B. Grinstein and J. Martin Camalich, Lifetime of \( {B}_c^{-} \) constrains explanations for anomalies in B → D(*)τν, Phys. Rev. Lett. 118 (2017) 081802 [arXiv:1611.06676] [INSPIRE].
D. Bečirević, M. Fedele, I. Nišandžić and A. Tayduganov, Lepton flavor universality tests through angular observables of \( \overline{B}\to {D}^{\left(\ast \right)}\mathrm{\ell}\overline{\nu } \) decay modes, arXiv:1907.02257 [INSPIRE].
M. Algueró, S. Descotes-Genon, J. Matias and M. Novoa-Brunet, Symmetries in B → D*ℓν angular observables, JHEP 06 (2020) 156 [arXiv:2003.02533] [INSPIRE].
U. Egede, T. Hurth, J. Matias, M. Ramon and W. Reece, New physics reach of the decay mode \( \overline{B}\to {\overline{K}}^{\ast 0}{\mathrm{\ell}}^{+}{\mathrm{\ell}}^{-} \), JHEP 10 (2010) 056 [arXiv:1005.0571] [INSPIRE].
J. Matias, F. Mescia, M. Ramon and J. Virto, Complete anatomy of \( {\overline{B}}_d\to {\overline{K}}^{\ast 0}\left(\to K\pi \right){\mathrm{\ell}}^{+}{\mathrm{\ell}}^{-} \) and its angular distribution, JHEP 04 (2012) 104 [arXiv:1202.4266] [INSPIRE].
L. Hofer and J. Matias, Exploiting the symmetries of P and S wave for B → K*μ+μ−, JHEP 09 (2015) 104 [arXiv:1502.00920] [INSPIRE].
LHCb collaboration, First measurement of the differential branching fraction and CP asymmetry of the B± → π±μ+μ− decay, JHEP 10 (2015) 034 [arXiv:1509.00414] [INSPIRE].
P.R. Auvil and J.J. Brehm, Wave functions for particles of higher spin, Phys. Rev. 145 (1966) 1152 [INSPIRE].
H.E. Haber, Spin formalism and applications to new physics searches, in 21st annual SLAC summer institute on particle physics: spin structure in high-energy processes (school: 26 Jul–3 Aug, topical conference: 4–6 Aug) (SSI 93), (1994) [hep-ph/9405376] [INSPIRE].
M. Jacob and G.C. Wick, On the general theory of collisions for particles with spin, Annals Phys. 7 (1959) 404 [INSPIRE].
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Hu, QY., Li, XQ., Mu, XL. et al. New physics in the angular distribution of \( {B}_c^{-} \) → J/ψ(→ μ+μ−)τ−(→ π−ντ)\( {\overline{\nu}}_{\tau } \) decay. J. High Energ. Phys. 2021, 75 (2021). https://doi.org/10.1007/JHEP06(2021)075
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DOI: https://doi.org/10.1007/JHEP06(2021)075