Ajit Kumar Mehta

Publications

INSPIRE-HEP Google Scholar

Refereed publications

  1. Searching for intermediate mass ratio binary black hole mergers in the third observing run of LIGO-Virgo-KAGRA

    M. H. Cheung, D. Wadekar, A. K. Mehta, T. Islam, J. Roulet, E. Berti, T. Venumadhav, B. Zackay, M. Zaldarriaga

    Phys. Rev. D 113, 023003 (2025)

  2. Improving gravitational wave search sensitivity with TIER: Trigger Inference using Extended strain Representation

    D. Wadekar, A. Pimpalkar, M. H.-Y. Cheung, B. Wandelt, E. Berti, A. K. Mehta, T. Venumadhav, J. Roulet, T. Islam, B. Zackay, J. Mushkin, M. Zaldarriaga

    arXiv:2507.08318 (2025) Accepted by PRD

  3. Binary black hole population inference combining confident and marginal events from the IAS-HM search pipeline

    A. K. Mehta, D. Wadekar, I. Anantpurkar, J. Roulet, T. Venumadhav, T. Islam, J. Mushkin, B. Zackay, M. Zaldarriaga

    Phys. Rev. D 112, 124023 (2025)

  4. Sampler-free gravitational wave inference using matrix multiplication

    Jonathan Mushkin et al. [with A. K. Mehta]

    Phys.Rev.D 112 10, 104025 (2025)

  5. Data-driven extraction, phenomenology and modeling of eccentric harmonics in binary black hole merger waveforms

    T. Islam, T. Venumadhav, A. K. Mehta, I. Anantpurkar, D. Wadekar, J. Roulet, J. Mushkin, B. Zackay, M. Zaldarriaga

    Phys. Rev. D 112, 044070 (2025)

  6. New binary black hole mergers in the LIGO–Virgo O3b data

    A. K. Mehta, S. Olsen, D. Wadekar, J. Roulet, T. Venumadhav, J. Mushkin, B. Zackay, M. Zaldarriaga

    Phys. Rev. D 111, 024049 (2025)

  7. A new approach to template banks of gravitational waves with higher harmonics: reducing matched-filtering cost by over an order of magnitude

    D. Wadekar, T. Venumadhav, A. K. Mehta, J. Roulet, S. Olsen, J. Mushkin, B. Zackay, M. Zaldarriaga

    Phys. Rev. D 110, 084035 (2024)

  8. New search pipeline for gravitational waves with higher-order modes using mode-by-mode filtering

    D. Wadekar, T. Venumadhav, J. Roulet, A. K. Mehta, B. Zackay, J. Mushkin, M. Zaldarriaga

    Phys. Rev. D 110, 044063 (2024)

  9. Laying the foundation of the effective-one-body waveform models SEOBNRv5: improved accuracy and efficiency for spinning non-precessing binary black holes

    Lorenzo Pompili et al. [with A. K. Mehta]

    Phys. Rev. D 108, 124035 (2023)

  10. Tests of General Relativity with Gravitational-Wave Observations using a Flexible–Theory-Independent Method

    A. K. Mehta, A. Buonanno, A. Ghosh, N. Sennett, J. Steinhoff

    Phys. Rev. D 107, 044020 (2023)

  11. Detection and parameter estimation challenges of Type-II lensed binary black hole signals

    A. Vijayakumar, A. K. Mehta, A. Ganguly

    Phys. Rev. D 108, 043036 (2023)

  12. Constraints on compact dark matter from gravitational wave microlensing

    S. Basak, A. Ganguly, K. Haris, S. Kapadia, A. K. Mehta, P. Ajith

    The Astrophysical Journal Letters (ApJL), 926, L28 (2022)

  13. Observing intermediate-mass black holes and the upper–stellar-mass gap with LIGO and Virgo

    A. K. Mehta, A. Buonanno, J. Gair, M. C. Miller, E. Farag, R. J. deBoer, M. Wiescher, F.X. Timmes

    The Astrophysical Journal (ApJ), 924(1) (2022)

  14. A detailed analysis of GW190521 with phenomenological waveform models

    H. Estellés et al. [with A. K. Mehta]

    The Astrophysical Journal, 924(2) (2022)

  15. Testing the nature of gravitational-wave polarizations using strongly lensed signals

    S. Goyal, K. Haris, A. K. Mehta, P. Ajith

    Phys. Rev. D 103, 024038 (2021)

  16. Testing the “no-hair” nature of binary black holes using the consistency of multipolar gravitational radiation

    T. Islam, A. K. Mehta, A. Ghosh, V. Varma, P. Ajith, B. S. Sathyaprakash

    Phys. Rev. D 101, 024032 (2020)

  17. Search for gravitational lensing signatures in LIGO and Virgo events

    O. Hannuksela, K. Haris, K. Ng, S. Kumar, A. K. Mehta, D. Keitel, T. F. Li, P. Ajith

    Astrophysical Journal Letters (ApJL), 874(1) (2019)

  18. Including mode mixing in a higher-multipole model for gravitational waveforms from nonspinning black-hole binaries

    A. K. Mehta, P. Tiwari, N. K. Johnson-McDaniel, C. K. Mishra, V. Varma, P. Ajith

    Phys. Rev. D 100, 024032 (2019)

  19. A “no-hair” test for binary black holes

    S. Dhanpal, A. Ghosh, A. K. Mehta, P. Ajith, B. S. Sathyaprakash

    Phys. Rev. D 99, 104056 (2019)

  20. Accurate inspiral–merger–ringdown gravitational waveforms for non-spinning black-hole binaries including the effect of subdominant modes

    A. K. Mehta, C. K. Mishra, V. Varma, P. Ajith

    Phys. Rev. D 96, 124010 (2017)

Preprints on arXiv

  1. Significant increase in sensitive volume of a gravitational wave search upon including higher harmonics

    A. K. Mehta, D. Wadekar, J. Roulet, I. Anantpurkar, T. Venumadhav, J. Mushkin, B. Zackay, M. Zaldarriaga, T. Islam

    arXiv:2501.17939 (2025) Submitted to PRL

  2. gwharmone: first data-driven surrogate for eccentric harmonics in binary black hole merger waveforms

    T. Islam, T. Venumadhav, A. K. Mehta, I. Anantpurkar, D. Wadekar, J. Roulet, J. Mushkin, B. Zackay, M. Zaldarriaga

    arXiv:2504.12420 (2025) Submitted to PRL

  3. New black hole mergers in the LIGO-Virgo O3 data from a gravitational wave search including higher-order harmonics

    D. Wadekar, J. Roulet, T. Venumadhav, A. K. Mehta, S. Olsen, B. Zackay, J. Mushkin, M. Zaldarriaga

    arXiv:2312.06631 (2023) Submitted to PRD

  4. Identifying strongly lensed gravitational wave signals from binary black hole mergers

    K. Haris, A. K. Mehta, S. Kumar, T. Venumadhav, P. Ajith

    arXiv:1807.07062 (2018) Accepted by PRD

LIGO Scientific Collaboration papers with significant contribution

  1. Tests of General Relativity with Binary Black Holes from the second LIGO-Virgo Gravitational-Wave Transient Catalog

    R. Abbott et al. [with A. K. Mehta]

    Phys. Rev. D 103, 122002 (2021)

  2. Search for lensing signatures in the gravitational-wave observations from the first half of LIGO-Virgo's third observing run

    R. Abbott et al. [with A. K. Mehta]

    The Astrophysical Journal (ApJ), 923(1) (2021)

  3. Tests of General Relativity with GWTC-3

    R. Abbott et al. [with A. K. Mehta]

    Phys. Rev. D 112, 084080 (2021)