Université de Montréal

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most citedNeural Machine Translation by Jointly Learning to Align and Translate

14.5k citations

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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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243 papers · 1 filter

hep-ph2025★ 1 cited

Isospin-based EWP-tree Relations

Bhubanjyoti Bhattacharya, Marianne Bouchard, Alexandre Jean +2

In 1998, it was shown that, if flavor SU(3) symmetry [SU(3) $_{F}$ ] is assumed in charmless $B \to P P$ decays ( $P$ is a light pseudoscalar meson), some reduced matrix elements involvi…

hep-ph2025★ 4 cited

Anomalies in Hadronic $B$ Decays: an Update

Bhubanjyoti Bhattacharya, Marianne Bouchard, Luke Hudy +3

Recently, $B \to P P$ decays ( $B = {B^{0}, B^{+}, B_{s}^{0}}$ , $P = {π, K}$ ) were analyzed under the assumption of flavor SU(3) symmetry (SU(3) $_{F}$ ). Although the individual fits to $Δ…

hep-ph2025

Investigating non-local contributions in $B_{s} \to ϕ ℓ ˉ ℓ$ including higher-twist effects

M. S. A. Alam Khan, Rusa Mandal, Praveen S Patil +1

We analyze the impact of higher-twist three-particle $B_{s}$ -meson light-cone distribution amplitudes (LCDAs) on the non-local form factors for the $B_{s} \to ϕ ℓ ˉ ℓ$ transiti…

hep-ph2023★ 17 cited

Anomalies in Hadronic $B$ Decays

Raphaël Berthiaume, Bhubanjyoti Bhattacharya, Rida Boumris +3

In this paper, we perform fits to $B \to P P$ decays, where $B = {B^{0}, B^{+}, B_{s}^{0}}$ and the pseudoscalar $P = {π, K}$ , under the assumption of flavor SU(3) symmetry [SU(3) $_{F}$ ].…

hep-ph2023

Charmless $B \to P P P$ Decays: the Fully-Antisymmetric Final State

Bhubanjyoti Bhattacharya, Mirjam Fines-Neuschild, Andrea Houck +3

Under flavor $S U (3)$ symmetry (SU(3) $_{F}$ ), the final-state particles in $B \to P P P$ decays ( $P$ is a pseudoscalar meson) are treated as identical, and the $P P P$ must be in a fully-s…

hep-ph2022★ 19 cited

A U-spin Puzzle in $B$ Decays

Bhubanjyoti Bhattacharya, Suman Kumbhakar, David London +1

We impose U spin symmetry ( $S U (2)_{Uspin}$ ) on the Hamiltonian for $B$ decays. As expected, we find the equality of amplitudes related by the exchange $d \leftrightarrow s$ . We…

hep-ph2022★ 3 cited

Lepton Flavor Violating $B \to K_{2}^{*} (1430) μ^{\pm} τ^{\mp}$ Decays

Suman Kumbhakar, Ria Sain, Juhi Vardani

A number of measurements in decays induced by the semileptonic $b \to s$ and $b \to c$ transitions hint towards a possible role of new physics in both sectors. Motivated by these ano…

hep-ph2022★ 15 cited

Dimension-8 SMEFT Matching Conditions for the Low-Energy Effective Field Theory

Serge Hamoudou, Jacky Kumar, David London

In particle physics, the modern view is to categorize things in terms of effective field theories (EFTs). Above the weak scale, we have the SMEFT, formed when the heavy new physics…

hep-ph2022★ 12 cited

Hazma Meets HERWIG4DM: Precision Gamma-Ray, Neutrino, and Positron Spectra for Light Dark Matter

Adam Coogan, Logan Morrison, Tilman Plehn +2

We present a new open-source package, Hazma 2, that computes accurate spectra relevant for indirect dark matter searches for photon, neutrino, and positron production from vector-m…

hep-ph2022★ 1 cited

The $B$ Anomalies, the $U_{1}$ Leptoquark and Dark Matter

Geneviève Bélanger, Jacky Kumar, David London +1

The present-day $B$ -anomalies involving $b \to s μ^{+} μ^{-}$ or $b \to c τ^{-} ν ˉ$ transitions can all be explained with the addition of a vector $U_{1}$ leptoquark with a mass of $M…

hep-ph2022★ 4 cited

Inverse Primakoff Scattering for Axionlike Particle Coupling

C. -P. Wu, C. -P. Liu, Greeshma C. +5

Axionlike particles (ALPs) can be produced in the Sun, and are considered viable candidates for the cosmological dark matter (DM). It can decay into two photons or interact with ma…

hep-ph2022★ 6 cited

Invariant Representation Driven Neural Classifier for Anti-QCD Jet Tagging

Taoli Cheng, Aaron Courville

We leverage representation learning and the inductive bias in neural-net-based Standard Model jet classification tasks, to detect non-QCD signal jets. In establishing the framework…

hep-ph2021★ 1 cited

Searching for light new physics at the LHC via lepton-number violation

Wafia Bensalem, David London, Daniel Stolarski +1

We study the collider phenomenology of a simplified model containing a right-handed $W$ in which the $W_{R}$ couples predominantly to the third generation in the quark sector. The mo…

hep-ph2021★ 83 cited

$B$ Flavour Anomalies: 2021 Theoretical Status Report

David London, Joaquim Matias

At the present time, there are discrepancies with the predictions of the SM in several observables involving $b \to s ℓ^{+} ℓ^{-}$ and $b \to c ℓ^{-} ν ˉ_{ℓ}$ decays. These…

hep-ph2021★ 13 cited

Neutrino Backgrounds in Future Liquid Noble Element Dark Matter Direct Detection Experiments

Andrea Gaspert, Pietro Giampa, David E. Morrissey

Experiments that use liquid noble gasses as target materials, such as argon and xenon, play a significant role in direct detection searches for WIMP(-like) dark matter. As these ex…

hep-ph2021★ 11 cited

Spin-dependent dark matter-electron interactions

C. -P. Liu, Chih-Pan Wu, Jiunn-Wei Chen +4

Detectors with low thresholds for electron recoil open a new window to direct searches of sub-GeV dark matter (DM) candidates. In the past decade, many strong limits on DM-electron…

hep-ph2020★ 1 cited

Testing the $R_{D^{(*)}}$ Anomaly at the LHeC

Georges Azuelos, Oliver Fischer, Sudip Jana

B-Physics anomalies have recently raised renewed interest in leptoquarks (LQ), predicted in several theoretical frameworks. Under simplifying but conservative assumptions, we show…

hep-ph2020★ 12 cited

CP Violation in Rare Lepton-Number-Violating $W$ Decays at the LHC

Fatemeh Najafi, Jacky Kumar, David London

Some models of leptogenesis involve a quasi-degenerate pair of heavy neutrinos $N_{1, 2}$ whose masses can be small, $O (GeV)$ . Such neutrinos can contribute to the rare lepton…

hep-ph2020★ 2 cited

PAAI in the sky : towards a particulate mechanism for Dark Energy and concordant Dark Matter

R. B. MacKenzie, M. B. Paranjape, U. A. Yajnik

We propose the origins of Dark Energy in a hidden sector with a pair of very light fermions, oppositely charged under an abelian gauge force $U (1)_{X}$ but of unequal mass. The syste…

hep-ph2020★ 29 cited

Anomalous dimensions from gauge couplings in SMEFT with right-handed neutrinos

Alakabha Datta, Jacky Kumar, Hongkai Liu +1

Standard Model Neutrino Effective Field Theory (SMNEFT) is an effective theory with Standard Model (SM) gauge-invariant operators constructed only from SM and right-handed neutrino…

hep-ph2020★ 13 cited

The role of non-universal $Z$ couplings in explaining the $V_{u s}$ anomaly

Ashutosh Kumar Alok, Amol Dighe, Shireen Gangal +1

The tension among measurements of $V_{u s}$ from different channels, the so-called Cabibbo Angle Anomaly, can be interpreted as a signal of lepton flavor universality (LFU) violatio…

hep-ph2020★ 16 cited

SMEFT ATLAS of $Δ F = 2$ Transitions

Jason Aebischer, Christoph Bobeth, Andrzej J. Buras +1

We present a model-independent anatomy of the $Δ F = 2$ transitions $K^{0} - K ˉ^{0}$ , $B_{s, d} - B ˉ_{s, d}$ and $D^{0} - D ˉ^{0}$ in the context of the Standard Model Effective Field Theo…

hep-ph2020★ 48 cited

Model-independent determination of the Migdal effect via photoabsorption

C. -P. Liu, Chih-Pan Wu, Hsin-Chang Chi +1

The Migdal effect in a dark-matter-nucleus scattering extends the direct search experiments to the sub-GeV mass region through electron ionization with sub-keV detection thresholds…

hep-ph2020★ 17 cited

LHC Constraints on Scalar Diquarks

Bruna Pascual-Dias, Pratishruti Saha, David London

A number of years ago, low-energy constraints on scalar diquarks, particles that couple to two quarks, were examined. It was found that the two most weakly-constrained diquarks are…

Isospin-based EWP-tree Relations

Anomalies in Hadronic B Decays: an Update

Investigating non-local contributions in Bs​→ϕℓˉℓ including higher-twist effects

Anomalies in Hadronic B Decays

Charmless B→PPP Decays: the Fully-Antisymmetric Final State

A U-spin Puzzle in B Decays

Lepton Flavor Violating B→K2∗​(1430)μ±τ∓ Decays