Research

Below are my published papers and selected talks I have given. A full list of my papers, including conference proceedings and preprints, is available on Inspire-HEP. You can also find my work on Google Scholar and ORCID.

Publications

2026

• B. Bhattacharya, A. Datta, G. Kumar, and D. Marfatia, “Axionlike particles and sterile neutrinos solve the $B\to K\nu\bar\nu$ and $B\to \pi K$ puzzles,” Phys. Rev. D 114, 035046, arXiv:2605.24713.

2025

• G. Kumar, S. Muhammad, and A. A. Petrov, “Finite width effects in nonleptonic D-meson decays,” Phys. Rev. D 111, 054038, arXiv:2501.00117.

2024

• G. Kumar and A. A. Petrov, “Constraints on light dark sector particles from lifetime difference of heavy neutral mesons,” Phys. Rev. D 110, 055031, arXiv:2407.14673.
• W.-S. Hou, G. Kumar, and S. Teunissen, “Discovery prospects for electron and neutron electric dipole moments in the general two Higgs doublet model,” Phys. Rev. D 109, L011703, arXiv:2308.04841.
• W.-S. Hou, G. Kumar, and T. Modak, “Probing baryogenesis with radiative beauty decay and electron electric dipole moment,” Phys. Rev. D 109, L011701, arXiv:2302.08847.

2023

• G. Kumar, “Interplay of the charged Higgs boson effects in $R_{D^{(*)}}$, $b \rightarrow s \ell^{+}\ell^{-}$, and $W$ mass,” Phys. Rev. D 107, 075016, arXiv:2212.07233.
• D. Das, J. Das, G. Kumar, and N. Sahoo, “$\Lambda_b \rightarrow \Lambda(\to p \pi^-) \ell^+\ell^-$ as probe of CP-violating new physics,” Phys. Rev. D 108, 015001, arXiv:2211.09065.
• W.-S. Hou, G. Kumar, and S. Teunissen, “Enhanced $B_q \to \ell\ell^\prime$ and $B \to (K, \pi) \ell\ell^\prime$ in light of $(g-2)_\mu$,” Phys. Rev. D 107, 095017, arXiv:2209.02086.

2022

• W.-S. Hou and G. Kumar, “Strange processes in general two Higgs doublet model,” JHEP 10, 129, arXiv:2207.07030.
• W.-S. Hou, G. Kumar, and S. Teunissen, “Charged lepton EDM with extra Yukawa couplings,” JHEP 01, 092, arXiv:2109.08936.

2021

• W.-S. Hou and G. Kumar, “Charged lepton flavor violation in light of muon $g-2$,” Eur. Phys. J. C 81, 1132, arXiv:2107.14114.
• W.-S. Hou, R. Jain, C. Kao, G. Kumar, and T. Modak, “Collider Prospects for Muon $g-2$ in General Two Higgs Doublet Model,” Phys. Rev. D 104, 075036, arXiv:2105.11315.

2020

• W.-S. Hou and G. Kumar, “Muon Flavor Violation in Two Higgs Doublet Model with Extra Yukawa Couplings,” Phys. Rev. D 102, 115017, arXiv:2008.08469.
• W.-S. Hou and G. Kumar, “Coming decade of $h \to \tau\mu$ and $\tau \to \mu\gamma$ interplay in $\tau$ flavor violation search,” Phys. Rev. D 101, 095017, arXiv:2003.03827.

2019

• D. Das, B. Kindra, G. Kumar, and N. Mahajan, “$B\to K^\ast_2(1430)\ell^+\ell^-$ distributions at large recoil in the Standard Model and beyond,” Phys. Rev. D 99, 093012, arXiv:1812.11803.

2018

• C. Hati, G. Kumar, J. Orloff, and A. M. Teixeira, “Reconciling $B$-meson decay anomalies with neutrino masses, dark matter and constraints from flavour violation,” JHEP 11, 011, arXiv:1806.10146.

2017

• D. Das, C. Hati, G. Kumar, and N. Mahajan, “Scrutinizing $R$-parity violating interactions in light of $R_{K^{(\ast)}}$ data,” Phys. Rev. D 96, 095033, arXiv:1705.09188.

2016

• D. Das, C. Hati, G. Kumar, and N. Mahajan, “Towards a unified explanation of $R_{D^{(\ast)}}$, $R_{K}$ and $(g-2)_{\mu}$ anomalies in a left-right model with leptoquarks,” Phys. Rev. D 94, 055034, arXiv:1605.06313.
• G. Kumar, “Constraints on a scalar leptoquark from the kaon sector,” Phys. Rev. D 94, 014022, arXiv:1603.00346.
• C. Hati, G. Kumar, and N. Mahajan, “$\bar{B}\rightarrow D^{(\ast)}\tau \bar{\nu}$ excesses in ALRSM constrained from $B$, $D$ decays and $D^{0}-\bar{D}^{0}$ mixing,” JHEP 01, 117, arXiv:1511.03290.
• G. Kumar and N. Mahajan, “$B\rightarrow K^{*}l^+ l^-$: Zeroes of angular observables as test of standard model,” Phys. Rev. D 93, 054041, arXiv:1412.2955.

Selected Talks

• “Light ALPs and Lepton Flavor Violation in Muonic Atoms,” Phenomenology 2026 Symposium (PHENO), University of Pittsburgh, Pennsylvania, USA, May 2026.
• “Light dark matter contribution to lifetime difference of heavy neutral mesons,” XV International Conference on Beauty, Charm, Hyperons in Hadronic Interactions (BEACH 2024), Charleston, South Carolina, USA, June 2024.
• “Minimal charged Higgs interpretation of B-physics anomalies and W-mass shift,” Invited talk at National Tsing Hua University, Hsinchu, Taiwan, December 2022.
• “Strange processes in general 2HDM,” International Conference on Kaon Physics (KAON2022), Osaka University, Osaka, Japan, September 2022.
• “Charged lepton flavor violation in the general two Higgs doublet model,” XIV International Conference on Interconnections between Particle Physics and Cosmology (PPC 2021), Norman, Oklahoma, USA (online), May 2021.
• “Minimal new physics explanation of anomalies in hadronic tau decays,” Intensity Frontier in Particle Physics: Flavor, CP Violation and Dark Physics, National Taiwan University, Taipei, and National Center for Theoretical Sciences, Hsinchu, Taiwan. Also presented at ANOMALIES 2019 (INDO-US workshop), July 2019, Indian Institute of Technology Hyderabad, India, October 2019.
• “Connecting $B$ decay anomalies with neutrino mass, dark matter, and flavor violation,” 16th Conference on Flavor Physics and CP Violation (FPCP), IIT Hyderabad and University of Hyderabad, Hyderabad, India, July 2018.
• “Resolution of $R_K$ and $R_{K^\ast}$ via R-parity violating interactions,” Mass 2018: Origin of Mass at the High Energy and Intensity Frontier, Centre for Cosmology and Particle Physics Phenomenology (CP$^3$-Origins), Odense, Denmark, May 2018.
• “Explanation of $b\to s\mu^+\mu^-$ anomalies in RPV framework,” Blueprints Beyond the Standard Model, Tata Institute of Fundamental Research, Mumbai, India, January 2018.
• “Role of kaon physics in search of new physics,” Overview talk at Workshop on High Energy Physics and Phenomenology (WHEPP XV), Indian Institute of Science Education and Research, Bhopal, India, December 2017.
• “Resolving $R_K$ and $R_{K^\ast}$ anomalies via R-parity violating interactions,” 25th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY17), Tata Institute of Fundamental Research, Mumbai, India, December 2017.
• “Explaining $R_{D^{(\ast)}}$, $R_K$, and $(g-2)_\mu$ anomalies in a left-right model with leptoquarks,” XXII DAE-BRNS High Energy Physics Symposium, University of Delhi, India, December 2016.