University of Hawaii System

output

19932026

researchers with a paper here

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

collaborating institutions

Showing hep-phShow all

361 papers · 1 filter

hep-ph2026

Massive right-handed neutrinos in $B ˉ \to D^{*} τ X ˉ$ decay

Nilakshi Das, Alakabha Datta, Tejhas Kapoor +2

We explore signatures of a massive right-handed neutrino (RHN) in angular distributions of $B ˉ \to D^{*} (\to D π) τ (\to π ν_{τ}) X ˉ$ decays, where $X$ is an invisible state. W…

hep-ph2026

Axion-like particles and sterile neutrinos solve the $B \to K ν ν ˉ$ and $B \to π K$ puzzles

Bhubanjyoti Bhattacharya, Alakabha Datta, Girish Kumar +1

The recent measurement of the branching ratio of $B^{+} \to K^{+} + inv$ (where ``inv'' denotes invisible states) by the Belle II collaboration is enhanced relative to the sta…

hep-ph2025★ 2 cited

Implications of the evidence for direct $CP$ violation in $D \to π^{+} π^{-}$ decays

Rahul Sinha, Thomas E. Browder, N. G. Deshpande +2

The observation of $C P$ violation in the difference of $C P$ asymmetries between $D \to K^{+} K^{-}$ and $D \to π^{+} π^{-}$ has raised a debate whether the observed asymmetries can be regarded…

hep-ph2025

Angular momentum of vacuum bubbles in a first-order phase transition

Jan Tristram Acuña, Danny Marfatia, Po-Yan Tseng

The formation of primordial black holes (PBHs) during a first-order phase transition (FOPT) in a dark sector has been of recent interest. A quantity that characterizes a black hole…

hep-ph2025★ 31 cited

Quantum Information meets High-Energy Physics: Input to the update of the European Strategy for Particle Physics

Yoav Afik, Federica Fabbri, Matthew Low +68

Some of the most astonishing and prominent properties of Quantum Mechanics, such as entanglement and Bell nonlocality, have only been studied extensively in dedicated low-energy la…

hep-ph2025

Neutrino Theory in the Precision Era

Asmaa Abada, Gabriela Barenboim, Toni Bertólez-Martínez +76

This document summarises discussions on future directions in theoretical neutrino physics, which are the outcome of a neutrino theory workshop held at CERN in February 2025. The st…

hep-ph2024

New physics searches via angular distributions of $B ˉ \to D^{*} (\to D π) τ (\to ℓ ν_{τ} ν ˉ_{ℓ}) ν ˉ_{τ}$ decays

Bhubanjyoti Bhattacharya, Thomas E. Browder, Alakabha Datta +3

The study of $B ˉ \to D^{*} τ ν ˉ_{τ}$ angular distribution can be used to obtain information about new physics (or beyond the Standard Model) couplings, which are motivated by…

hep-ph2024★ 4 cited

CYG $ν$ S: Detecting solar neutrinos with directional gas time projection chambers

Chiara Lisotti, Ciaran A. J. O'Hare, Elisabetta Baracchini +8

CYGNUS is a proposed global network of large-scale gas time projection chambers (TPCs) with the capability of directionally detecting nuclear and electron recoils at $≳$ keV e…

hep-ph2024★ 9 cited

New dark matter analysis of Milky Way dwarf satellite galaxies with MADHATv2

Kimberly K. Boddy, Zachary J. Carter, Jason Kumar +3

We obtain bounds on dark matter annihilation using 14 years of publicly available Fermi-LAT data from a set of 54 dwarf spheroidal galaxies, using spectral information from 16 ener…

hep-ph2023★ 3 cited

Are There Correlations in the HAWC and IceCube High Energy Skymaps Outside the Galactic Plane?

Jason Kumar, Carsten Rott, Pearl Sandick +1

We use publicly-available data to perform a search for correlations of high energy neutrino candidate events detected by IceCube and high-energy photons seen by the HAWC collaborat…

hep-ph2023

Opening windows with Isospin-Violating Dark Matter

Jason Kumar, Danny Marfatia, Ningqiang Song

We consider the effect of isospin-violating dark matter-nucleon interactions on direct detection constraints in the regime of small dark matter mass and large scattering cross sect…

hep-ph2023★ 37 cited

$B \to K ν ν ˉ$ , MiniBooNE and muon $g - 2$ anomalies from a dark sector

Alakabha Datta, Danny Marfatia, Lopamudra Mukherjee

Belle II has reported the first evidence for $B^{+} \to K^{+} ν ν ˉ$ with a branching ratio $2.7 σ$ higher than the standard model expectation. We explain this, and the MiniBooNE and m…

hep-ph2023★ 3 cited

Machine Learning Techniques for Intermediate Mass Gap Lepton Partner Searches at the Large Hadron Collider

Bhaskar Dutta, Tathagata Ghosh, Alyssa Horne +6

We consider machine learning techniques associated with the application of a Boosted Decision Tree (BDT) to searches at the Large Hadron Collider (LHC) for pair-produced lepton par…

hep-ph2023★ 6 cited

Constraining $p$ -wave Dark Matter Annihilation with Gamma-ray Observations of M87

Katharena Christy, Jason Kumar, Pearl Sandick

We consider constraints on $p$ -wave dark matter in a dark matter spike surrounding the supermassive black hole at the center of M87. Owing to the large mass of the black hole, and…

hep-ph2022★ 4 cited

The Velocity-Dependent $J$ -factor of the Milky Way Halo: Does What Happens in the Galactic Bulge Stay in the Galactic Bulge?

Kenny Kiriu, Jason Kumar, Jack Runburg

We consider the angular distribution of the photon signal which could arise from velocity-dependent dark matter annihilation within the Galactic bulge. We find that, for the case o…

hep-ph2022★ 4 cited

Low-Mass dark matter (in)direct detection with inelastic scattering

Nicole F. Bell, James B. Dent, Bhaskar Dutta +2

We revisit the detection of luminous dark matter in direct detection experiments. In this scenario, dark matter scatters endothermically to produce an excited state, which decays t…

hep-ph2022★ 9 cited

Implications for the $Δ A_{F B}$ anomaly in $B ˉ^{0} \to D^{*+} ℓ^{-} ν ˉ$ using a new Monte Carlo Event Generator

Bhubanjyoti Bhattacharya, Thomas E. Browder, Quinn Campagna +4

Recent experimental results in $B$ physics from Belle, BaBar and LHCb suggest new physics (NP) in the weak $b \to c$ charged-current and the $b \to s$ neutral-current processes. Here…

hep-ph2022★ 3 cited

Indirect Detection of Low-mass Dark Matter Through the $π^{0}$ and $η$ Windows

J. G. Christy, Jason Kumar, Arvind Rajaraman

We consider the search for gamma-rays produced by the annihilation or decay of low-mass dark matter which couples to quarks. In this scenario, most of the photons are produced from…

hep-ph2022★ 18 cited

Sensitivity to Dark Sector Scales from Gravitational Wave Signatures

James B. Dent, Bhaskar Dutta, Sumit Ghosh +2

We consider gravitational wave signals produced by a first-order phase transition in a theory with a generic renormalizable thermal effective potential of power law form. We find t…

hep-ph2022★ 49 cited

Snowmass2021 Cosmic Frontier White Paper: Ultraheavy particle dark matter

Daniel Carney, Nirmal Raj, Yang Bai +25

We outline the unique opportunities and challenges in the search for "ultraheavy" dark matter candidates with masses between roughly $10 TeV$ and the Planck scale $m_{\rm pl}…

hep-ph2022

Axion Instability Supernovae

Jeremy Sakstein, Djuna Croon, Samuel D. McDermott

New particles coupled to the Standard Model can equilibrate in stellar cores if they are sufficiently heavy and strongly coupled. In this work, we investigate the astrophysical con…

hep-ph2022★ 54 cited

Tau Neutrinos in the Next Decade: from GeV to EeV

Roshan Mammen Abraham, Jaime Alvarez-Muñiz, Carlos A. Argüelles +63

Tau neutrinos are the least studied particle in the Standard Model. This whitepaper discusses the current and expected upcoming status of tau neutrino physics with attention to the…

hep-ph2022★ 6 cited

Probing an MeV-Scale Scalar Boson in Association with a TeV-Scale Top-Quark Partner at the LHC

Bhaskar Dutta, Sumit Ghosh, Alfredo Gurrola +3

Searches for new low-mass matter and mediator particles have actively been pursued at fixed target experiments and at $e^{+} e^{-}$ colliders. It is challenging at the CERN LHC, but the…

hep-ph2021★ 12 cited

$J$ -factors for Velocity-dependent Dark Matter

Bradly Boucher, Jason Kumar, Van B. Le +1

If dark matter annihilates with a velocity-dependent cross section within a subhalo, then the magnitude and angular distribution of the resulting photon signal will change. These e…

Massive right-handed neutrinos in Bˉ→D∗τXˉ decay

Axion-like particles and sterile neutrinos solve the B→Kννˉ and B→πK puzzles

Implications of the evidence for direct CP violation in D→π+π− decays