N. Rad

Evidence for Neutrino Emission from X-Ray-bright Active Galactic Nuclei with IceCube

R. Abbasi, M. Ackermann, J. Adams +429

Recently, IceCube reported neutrino emission from the Seyfert galaxy NGC 1068. Using 13.1 years of IceCube data, we present a follow-up search for neutrino sources in the northern…

Novel method for the identification of the production flavor of neutral charmed mesons

Belle II Collaboration, I. Adachi, L. Aggarwal +396

We propose a new algorithm for the identification of the production flavor of neutral $D$ mesons in the Belle II experiment. The algorithm exploits the correlation between the flav…

Measurement of branching fractions and direct $C P$ asymmetries for $B \to K I ¨ $ and $B \to I ¨ I ¨ $ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +435

We report measurements of the branching fractions and direct $CP$ asymmetries of the decays $B^{0} \to K^{+} I ¨ ^{-}$ , $B^{+} \to K^{+} I ¨ ^{0}$ , $B^{+} \to K^{0} I ¨ ^{+}$ , and $B^{0} \to K^{0} I ¨ ^{0}$ ,…

Reconstruction of $B \to I ¨ ℓ I^½_{ℓ}$ decays identified using hadronic decays of the recoil $B$ meson in 2019 -- 2021 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +580

We present results on the semileptonic decays $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ and $B^{+} \to I ¨ ^{0} ℓ^{+} I^½_{ℓ}$ in a sample corresponding to 189.9/fb of Belle II data at the SuperKEK…

High-energy neutrino emission from the Milky Way

R. Abbasi, M. Ackermann, J. Adams +440

The Milky Way hosts astrophysical objects that accelerate cosmic rays to energies beyond the reach of terrestrial particle accelerators. It remains a longstanding goal to locate th…

VERITAS and multiwavelength observations of the Blazar B3 2247+381 in response to an IceCube neutrino alert

Atreya Acharyya, Colin B. Adams, Priyadarshini Bangale +494

While the sources of the diffuse astrophysical neutrino flux detected by the IceCube Neutrino Observatory are still largely unknown, one of the promising methods used towards under…

Search for Extremely-High-Energy Neutrinos and First Constraints on the Ultrahigh-Energy Cosmic-Ray Proton Fraction with IceCube

IceCube Collaboration, R. Abbasi, M. Ackermann +423

We present a search for the diffuse extremely-high-energy neutrino flux using $12.6$ years of IceCube data. The nonobservation of neutrinos with energies well above $10 \, \mathrm{…

Precise measurement of the $D^{0}$ and $D^{+}$ lifetimes at Belle II

Belle II collaboration, F. AbudinÃ©n, I. Adachi +385

We report a measurement of the $D^{0}$ and $D^{+}$ lifetimes using $D^{0} \to K^{-} I ¨ ^{+}$ and $D^{+} \to K^{-} I ¨ ^{+} I ¨ ^{+}$ decays reconstructed in $e^{+} e^{-} \to c c ˉ$ data recorded by the Belle II…

Characterization of the Three-Flavor Composition of Cosmic Neutrinos with IceCube

R. Abbasi, M. Ackermann, J. Adams +429

Neutrinos oscillate over cosmic distances. Using 11.4 years of IceCube data, the flavor composition of the all-sky neutrino flux from 5\,TeV--10\,PeV is studied. We report the firs…

Study of $B \to D^{(*)} h$ decays using $62.8 fb^{- 1}$ of Belle II data

Belle II Collaboration, F. Abudinen, I. Adachi +549

We report measurements related to hadronic $B$ decays to final states that contain charm mesons. The analyses are performed on a $62.8 fb^{- 1}$ data set collected by the B…

Tests of light-lepton universality in angular asymmetries of $B^{0} \to D^{*-} ℓ I^½$ decays

Belle II Collaboration, I. Adachi, K. Adamczyk +416

We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^{0}$ -meson decays to charged spin-1 charmed mesons. We measure f…

Measurement of the $I ¨ $ -lepton mass with the Belle~II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +418

We present a measurement of the $I ¨ $ -lepton mass using a sample of about 175 million $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-}$ events collected with the Belle II detector at the SuperKEKB $e^{+} e^{-}$ col…

Determination of $∣ V_{u b} ∣$ from untagged $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ decays using 2019-2021 Belle II data

Belle II Collaboration, K. Adamczyk, L. Aggarwal +588

We present an analysis of the charmless semileptonic decay $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ , where $ℓ = e, I^¼$ , from 198.0 million pairs of $B B ˉ$ mesons recorded by the Belle…

Time-Integrated Southern-Sky Neutrino Source Searches with 10 Years of IceCube Starting-Track Events at Energies Down to 1 TeV

R. Abbasi, M. Ackermann, J. Adams +423

In the IceCube Neutrino Observatory, a signal of astrophysical neutrinos is obscured by backgrounds from atmospheric neutrinos and muons produced in cosmic-ray interactions. IceCub…

Measurement of the branching fraction of the $B^{0} \to K_{S}^{0} I ¨ ^{0} I^^{3}$ decay using 190 fb $^{- 1}$ of Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +590

We report the measurement of the branching fraction of the $B^{0} \to K_{S}^{0} I ¨ ^{0} I^^{3}$ decay in $e^{+} e^{-} \to I^¥ (4 S) \to B B$ data recorded by the Belle II experiment at the…

Identification and Denoising of Radio Signals from Cosmic-Ray Air Showers using Convolutional Neural Networks

R. Abbasi, M. Ackermann, J. Adams +426

Radio pulses generated by cosmic-ray air showers can be used to reconstruct key properties like the energy and depth of the electromagnetic component of cosmic-ray air showers. Rad…

A calibration of the Belle II hadronic tag-side reconstruction algorithm with $B \to X ℓ I^½$ decays

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +540

Tag-side reconstruction is an important method for reconstructing $B$ meson decays with missing energy. The Belle II tag-side reconstruction algorithm, Full Event Interpretation, r…

High-Energy Neutrino Tomography of the Earth's Interior with IceCube

The IceCube Collaboration, R. Abbasi, M. Ackermann +417

The Earth's interior reflects its geological evolution, from accretion to present-day dynamics. Its structure drives the geodynamo in the outer core, generating the magnetic field…

Angular analysis of $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ decays reconstructed in 2019-2020 Belle II data

Belle II collaboration, F. AbudinÃ©n, I. Adachi +549

We report on the first Belle II measurement of the branching fraction ( $B$ ) and longitudinal polarization fraction ( $f_{L}$ ) of $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ decays. We reconstruct $B^…

Measurement of the $B^{0} \to D^{*-} ℓ^{+} I^½_{ℓ}$ branching ratio and $∣ V_{c b} ∣$ with a fully reconstructed accompanying $B$ meson in 2019-2021 Belle II data

F. AbudinÃ©n, I. Adachi, K. Adamczyk +581

We present a measurement of the $B^{0} \to D^{*-} ℓ^{+} I^½_{ℓ}$ ( $ℓ = e, I^¼$ ) branching ratio and of the CKM parameter $∣ V_{c b} ∣$ using signal decays accompanied by a…

Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data

Belle II collaboration, F. AbudinÃ©n, I. Adachi +549

We report on measurements of branching fractions ( $B$ ) and CP-violating charge asymmetries ( $A_{CP}$ ) of multibody charmless $B$ decays reconstructed by the…

IceCube Second Track Data Release IceTracks-DR2: Data from 2008-2022 for Neutrino Source Searches

R. Abbasi, M. Ackermann, J. Adams +412

We present IceCube's latest release of muon track data for neutrino point-source searches, extending the previously published 10-year dataset to cover 14 years of observations (Apr…

First decay-time-dependent analysis of $B^{0} \to K_{S}^{0} I ¨ ^{0}$ at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +590

We report measurements of the branching fraction ( $B$ ) and direct $C P$ -violating asymmetry ( $A_{C P}$ ) of the charmless decay $B^{0} \to K^{0} I ¨ ^{0}$ at Belle II. A sample of…

Search for neutrino doublets and triplets using 11.4 years of IceCube data

R. Abbasi, M. Ackermann, J. Adams +423

We report a search for high-energy astrophysical neutrino multiplets, detections of multiple neutrino clusters in the same direction within 30 days, based on an analysis of 11.4 ye…

Measurement of branching-fraction ratios and $C P$ asymmetries in $B^{\pm} \to D_{C P \pm} K^{\pm}$ decays at Belle and Belle II

The Belle, Belle II Collaborations, : +427

We report results from a study of $B^{\pm} \to D K^{\pm}$ decays followed by $D$ decaying to $C P$ ~eigenstates, where $D$ indicates a $D^{0}$ or $D ˉ^{0}$ meson. These decays a…

Exclusive $B \to X_{u} ℓ I^½_{ℓ}$ Decays with Hadronic Full-event-interpretation Tagging in 62.8 fb $^{- 1}$ of Belle II Data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +565

We present a reconstruction in early data of the semileptonic decay $B^{+} \to I ¨ ^{0} ℓ^{+} I^½_{ℓ}$ , and first results of a reconstruction of the decays $B^{+} \to I ¨ ^{0} ℓ^{+} I^½_{ℓ}$ …

Search for Axion-Like Particles produced in $e^{+} e^{-}$ collisions at Belle II

Belle II collaboration, F. Abudinen, I. Adachi +334

We present a search for the direct production of a light pseudoscalar $a$ decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process…

Deep Search for Joint Sources of Gravitational Waves and High-Energy Neutrinos with IceCube During the Third Observing Run of LIGO and Virgo

The IceCube Collaboration, R. Abbasi, M. Ackermann +2209

The discovery of joint sources of high-energy neutrinos and gravitational waves has been a primary target for the LIGO, Virgo, KAGRA, and IceCube observatories. The joint detection…

Measurement of the $I^c ◯_{c}^{0}$ lifetime at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +353

We report on a measurement of the $I^c ◯_{c}^{0}$ lifetime using $I^c ◯_{c}^{0} \to I^c ◯^{-} I ¨ ^{+}$ decays reconstructed in $e^{+} e^{-} \to c c ˉ$ data collected by the Belle II experiment and correspon…

Measurement of the branching fraction for $B^{0} \to I ¨ ^{0} I ¨ ^{0}$ decays reconstructed in 2019-2020 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +551

We report the first reconstruction of the $B^{0} \to I ¨ ^{0} I ¨ ^{0}$ decay mode at Belle II using samples of 2019 and 2020 data that correspond to 62.8 fb $^{- 1}$ of integrated lumin…

$I ¨ $ lepton mass measurement at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +539

The reconstruction of tau-pair production, $e^{+} e^{-} \to I ¨ ^{+} I ¨ ^{-}$ , from the subsequent 3-prong ( $I ¨ ^{+} \to I ¨ ^{+} I ¨ ^{-} I ¨ ^{+} I^ˉ ½_{I ¨} $ ) and 1-prong ($Ï^{-} \to…

Measurement of the energy dependence of the $e^{+} e^{-} \to B B ˉ$ , $B B ˉ^{}$ , and $B^{} B ˉ^{*}$ cross sections at Belle~II

Belle II Collaboration, I. Adachi, L. Aggarwal +466

We report measurements of the $e^{+} e^{-} \to B B ˉ$ , $B B ˉ^{*}$ , and $B^{*} B ˉ^{*}$ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected b…

Measurement of the $B^{0}$ lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019-2021 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +393

We measure the $B^{0}$ lifetime and flavor-oscillation frequency using $B^{0} \to D^{(*) -} I ¨ ^{+}$ decays collected by the Belle II experiment in asymmetric-energy $e^{+} e^{-}$ collisions prod…

All-sky neutrino point-source search with IceCube combined track and cascade data

R. Abbasi, M. Ackermann, J. Adams +424

Despite extensive efforts, discovery of high-energy astrophysical neutrino sources remains elusive. We present an event-level simultaneous maximum likelihood analysis of tracks and…

Determination of $∣ V_{c b} ∣$ using $B^{0} \to D^{*+} ℓ^{-} I^ˉ ½_{ℓ}$ decays with Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +416

We determine the CKM matrix-element magnitude $∣ V_{c b} ∣$ using $B^{0} \to D^{*+} ℓ^{-} I^ˉ ½_{ℓ}$ decays reconstructed in $189 fb^{- 1}$ of collision data colle…

The IceCube-Gen2 Collaboration -- Contributions to the 39th International Cosmic Ray Conference (ICRC2025)

R. Abbasi, M. Ackermann, J. Adams +465

IceCube-Gen2 is a planned next-generation neutrino observatory at the South Pole that builds upon the successful design of IceCube. Integrating two complementary detection technolo…

Observation of $e^{+} e^{-} \to I ¨ I ¨ _{b J} (1 P)$ and search for $X_{b} \to I ¨ I^¥ (1 S)$ at $s$ near 10.75 GeV

Belle II collaboration, I. Adachi, L. Aggarwal +348

We study the processes $e^{+} e^{-} \to I ¨ I ¨ _{b J} (1 P)$ ( $J$ = 0, 1, or 2) using samples at center-of-mass energies $s$ = 10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8,…

Neural posterior estimation of the neutrino direction in IceCube using transformer-encoded normalizing flows on the sphere

R. Abbasi, M. Ackermann, J. Adams +411

IceCube is a cubic-kilometer-scale neutrino detector located at the geographic South Pole. A precise directional reconstruction of IceCube neutrinos is vital for associations with…

Search for Heavy Neutral Leptons with IceCube DeepCore

R. Abbasi, M. Ackermann, J. Adams +421

The observation of neutrino oscillations has established that neutrinos have non-zero masses. This phenomenon is not explained by the Standard Model of particle physics, but one vi…

Measurement of $C P$ asymmetries and branching-fraction ratios for $B^{\pm} \to D K^{\pm}$ and $D I ¨ ^{\pm}$ with $D \to K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ using Belle and Belle II data

Belle, Belle II Collaboration, : +408

We measure $C P$ asymmetries and branching-fraction ratios for $B^{\pm} \to D K^{\pm}$ and $D I ¨ ^{\pm}$ decays with $D \to K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ , where $D$ is a superposition of $D^{0}$ a…

Measurement of $C P$ asymmetries in $B^{0} \to K_{S}^{0} K_{S}^{0} K_{S}^{0}$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +450

We report a measurement of decay-time dependent charge-parity ( $C P$ ) asymmetries in $B^{0} \to K_{S}^{0} K_{S}^{0} K_{S}^{0}$ decays. We use $387 \times 1 0^{6} B B ˉ$ pairs collected at…

Search for Lepton-Flavor-Violating $I ¨ $ Decays to a Lepton and an Invisible Boson at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +398

We search for lepton-flavor-violating $I ¨ ^{-} \to e^{-} I^\pm$ and $I ¨ ^{-} \to I^¼^{-} I^\pm$ decays, where $I^\pm$ is an invisible spin-0 boson. The search uses electron-positron collisions at $10.58$ G…

Measurement of the branching fraction and $CP$ asymmetry of $B^{0} \to I ¨ ^{0} I ¨ ^{0}$ decays using $198 \times 1 0^{6}$ $B B$ pairs in Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +425

We report measurements of the branching fraction and $CP$ asymmetry in $B^{0} \to I ¨ ^{0} I ¨ ^{0}$ decays reconstructed at Belle II in an electron-positron collision sample conta…

A Search for Millimeter-Bright Blazars as Astrophysical Neutrino Sources

R. Abbasi, M. Ackermann, J. Adams +424

The powerful jets of blazars have been historically considered as likely sites of high-energy cosmic-ray acceleration. However, particulars of the launched jet and the locations of…

Exclusive $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ Decays with Hadronic Full Event Interpretation Tagging in 34.6 fb $^{- 1}$ of Belle II Data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +541

We present the results of the re-discovery of the decay $B^{0} \to I ¨ ^{-} ℓ^{+} I^½_{ℓ}$ in 34.6 fb $^{- 1}$ of Belle II data using hadronic $B$ -tagging via the Full Event Interpretatio…

Rediscovery of $B \to I ¨ K^{()}$ decays and measurement of the longitudinal polarization fraction $f_{L}$ in $B \to I ¨ K^{}$ decays using the Summer 2020 Belle II dataset

F. AbudinÃ©n, I. Adachi, R. Adak +538

We utilize a sample of 34.6 fb $^{- 1}$ , collected by the Belle II experiment at the SuperKEKB asymmetric energy $e^{+} e^{-}$ collider, to search for the $B^{+} \to I ¨ K^{+}$ , $B^+ \to ÏK^{*…

Prompt Searches for Very-High-Energy Î³-Ray Counterparts to IceCube Astrophysical Neutrino Alerts

J. Abhir, A. Biland, K. Brand +817

The search for sources of high-energy astrophysical neutrinos can be significantly advanced through a multi-messenger approach, which seeks to detect the gamma rays that accompany…

Observation of Cosmic-Ray Anisotropy in the Southern Hemisphere with 12 yr of Data Collected by the IceCube Neutrino Observatory

R. Abbasi, M. Ackermann, J. Adams +434

We analyzed the 7.92 $\times 1 0^{11}$ cosmic-ray-induced muon events collected by the IceCube Neutrino Observatory from May 13, 2011, when the fully constructed experiment started t…

Measurement of the $I^_{c}^{+}$ lifetime

Belle II Collaboration, F. AbudinÃ©n, L. Aggarwal +360

An absolute measurement of the $I^_{c}^{+}$ lifetime is reported using $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decays in events reconstructed from data collected by the Belle II experiment at t…

Estimating the sensitivity of the IceCube Upgrade to probe the interior of the Earth using atmospheric neutrino oscillations

The IceCube Collaboration, R. Abbasi, M. Ackermann +421

The IceCube Upgrade is a densely instrumented central region of the IceCube Neutrino Observatory, deployed during the 2025-26 polar season. It will reduce the detector's energy thr…

Probing the PeV Region in the Astrophysical Neutrino Spectrum using $I^½_{I^} ¼$ from the Southern Sky

R. Abbasi, M. Ackermann, J. Adams +425

IceCube has observed a diffuse astrophysical neutrino flux over the energy region from a few TeV to a few PeV. At PeV energies, the spectral shape is not yet well measured due to t…

Measurement of decay-time dependent $C P$ violation in $B^{0} \to K_{S}^{0} K_{S}^{0} K_{S}^{0}$ using 2019--2021 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +590

We report a measurement of decay-time dependent $C P$ -violating parameters in $B^{0} \to K_{S}^{0} K_{S}^{0} K_{S}^{0}$ decays. We use $(198.0 \pm 3.0) \times 1 0^{6} B B$ pairs c…

Measurement of the branching fraction for the decay $B \to K^{*} (892) ℓ^{+} ℓ^{-}$ at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +590

We report a measurement of the branching fraction of $B \to K^{*} (892) ℓ^{+} ℓ^{-}$ decays, where $ℓ^{+} ℓ^{-} = I^¼^{+} I^¼^{-}$ or $e^{+} e^{-}$ , using electron-positron collisions recor…

Measurement of the mean number of muons with energies above 500 GeV in air showers detected with the IceCube Neutrino Observatory

R. Abbasi, M. Ackermann, J. Adams +413

We present a measurement of the mean number of muons with energies larger than 500 GeV in near-vertical extensive air showers initiated by cosmic rays with primary energies between…

Constraints on the Correlation of IceCube Neutrinos with Tracers of Large-Scale Structure

R. Abbasi, M. Ackermann, J. Adams +430

The IceCube Neutrino Observatory has observed extragalactic astrophysical neutrinos with an apparently isotropic distribution. Only a small fraction of the observed astrophysical n…

Measurement of Branching Fraction and Longitudinal Polarization in $B^{0} \to I ¨ ^{+} I ¨ ^{-}$ Decays at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +584

We present a measurement of the branching fraction and longitudinal polarization of $B^{0} \to I ¨ ^{+} I ¨ ^{-}$ decays. SuperKEKB electron-positron collision data corresponding to 189~fb$^…

Measurement of the time-integrated mixing probability $I ¨ _{d}$ with a semileptonic double-tagging strategy and $34.6 fb^{- 1}$ of Belle II collision data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +550

We present the first measurement of the time-integrated mixing probability $I ¨ _{d}$ using Belle II data collected at a center-of-mass (CM) energy of 10.58 GeV, corresponding to the m…

Measurement of Hadronic Mass Moments $⟨ M_{X}^{n} ⟩$ in $B \to X_{c} ℓ I^½$ Decays at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +540

We present measurements of the first six hadronic mass moments in semileptonic $B \to X_{c} ℓ I^½$ decays. The hadronic mass moments, together with other observables of inc…

Evidence for $B^{+} \to K^{+} I^½ I^ˉ ½$ decays

Belle II Collaboration, I. Adachi, K. Adamczyk +452

We search for the rare decay $B^{+} \to K^{+} I^½ I^ˉ ½$ in a $362 fb^{- 1}$ sample of electron-positron collisions at the $I^¥ (4 S)$ resonance collected with the Belle II…

Improved measurements of the TeV-PeV extragalactic neutrino spectrum from joint analyses of IceCube tracks and cascades

R. Abbasi, M. Ackermann, J. Adams +424

The IceCube South Pole Neutrino Observatory has discovered the presence of a diffuse astrophysical neutrino flux at energies of TeV and beyond using neutrino induced muon tracks an…

Evidence for a Spectral Break or Curvature in the Spectrum of Astrophysical Neutrinos from 5 TeV--10 PeV

R. Abbasi, M. Ackermann, J. Adams +424

We report improved measurements of the all flavor astrophysical neutrino spectrum with IceCube by combining complementary neutrino samples in two independent analyses. Both analyse…

Measurements of branching fractions and direct CP asymmetries in $B^{0} \to K^{+} I ¨ ^{-}$ , $B^{+} \to K_{S}^{0} I ¨ ^{+}$ and $B^{0} \to I ¨ ^{+} I ¨ ^{-}$ using 2019 and 2020 data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +549

We report updated measurements of branching fractions ( $B$ ) and CP-violating charge asymmetries ( $A_{CP}$ ) for charmless $B$ decays at Belle II, which opera…

Sensitivity Projections for Low-Mass Dark Matter Annihilation with the IceCube Upgrade

R. Abbasi, M. Ackermann, J. Adams +412

The IceCube Upgrade, an extension designed to enhance the IceCube Neutrino Observatory's detection of neutrinos with energies between 1 GeV and 500 GeV, will markedly improve IceCu…

Measurement of the branching fractions and $C P$ asymmetries of $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ and $B^{+} \to K^{+} I ¨ ^{0}$ decays in 2019-2021 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +582

We determine the branching fractions $B$ and $C P$ asymmetries $A_{CP}$ of the decays $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ and $B^{+} \to K^{+} I ¨ ^{0}$ . The res…

Evidence for neutrino emission from X-ray Bright Seyfert Galaxies in the Southern Hemisphere using Enhanced Starting Track Events with IceCube

R. Abbasi, M. Ackermann, J. Adams +428

IceCube recently reported the observation of TeV neutrinos from the nearby Seyfert galaxy NGC~1068, and the corresponding neutrino flux is significantly higher than the upper limit…

First flavor tagging calibration using 2019 Belle II data

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +540

We report on the first calibration of the standard Belle II $B$ -flavor tagger using the full data set collected at the $I^¥ (4 S)$ resonance in 2019 with the Belle II detector a…

physics.ins-det2026

WavePID: Low-energy flavor identification using single-PMT time series in IceCube

R. Abbasi, M. Ackermann, J. Adams +416

The IceCube Neutrino Observatory, a cubic-kilometer detector at the South Pole, identifies neutrino flavor through event morphology. Sparse photon detection makes this classificati…

A test of light-lepton universality in the rates of inclusive semileptonic $B$ -meson decays at Belle II

Belle II Collaboration, L. Aggarwal, H. Ahmed +349

We present the first measurement of the ratio of branching fractions of inclusive semileptonic $B$ -meson decays, $R(X_{e/Î¼}) = \mathcal{B}(B\to X \, e \, Î½) / \mathcal{B}(B\to X…

Search for an invisible $Z^{'}$ in a final state with two muons and missing energy at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +385

The $L_{I^} ¼ - L_{I ¨} $ extension of the standard model predicts the existence of a lepton-flavor-universality-violating $Z^{'}$ boson that couples only to the heavier lepton families…

Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J / I ¨ K$ decays at Belle II

Belle II Collaboration, F. AbudinÃ©n, I. Adachi +591

We report a study of $B \to J / I ¨ (ℓ^{+} ℓ^{-}) K$ decays, where $ℓ$ represents an electron or a muon, using $e^{+} e^{-}$ collisions at the $I^¥ (4 S)$ resonance. The data were c…

Search for a long-lived spin-0 mediator in $b \to s$ transitions at the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +411

Additional spin-0 particles appear in many extensions of the standard model. We search for long-lived spin-0 particles $S$ in $B$ -meson decays mediated by a $b \to s$ quark transiti…

The IceCube Collaboration -- Contributions to the 39th International Cosmic Ray Conference (ICRC2025)

R. Abbasi, M. Ackermann, J. Adams +426

The IceCube Observatory at the South Pole has been operating in its full configuration since May 2011 with a duty cycle of about 99%. Its main component consists of a cubic-kilomet…

Determination of $∣ V_{c b} ∣$ from $B \to D ℓ I^½$ decays using 2019-2021 Belle II data

We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $V_{c b}$ using $B \to D ℓ I^½$ decays. The result is based on $e^{+} e^{-} \to I^¥ (4 S)$ dat…

Measurement of $C P$ asymmetries in $B^{0} \to I ¨ K_{S}^{0}$ decays with Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +432

We present a measurement of time-dependent rate asymmetries in $B^{0} \to I ¨ K_{S}^{0}$ decays to search for non-standard-model physics in $b \to q q s$ transitions. The data samp…

Search for a dark photon and an invisible dark Higgs boson in $I^¼^{+} I^¼^{-}$ and missing energy final states with the Belle II experiment

The dark photon $A^{'}$ and the dark Higgs boson $h^{'}$ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of $A^\pri…

Search for GeV-scale Dark Matter from the Galactic Center with IceCube-DeepCore

The IceCube Collaboration, R. Abbasi, M. Ackermann +431

Models describing dark matter as a novel particle often predict that its annihilation or decay into Standard Model particles could produce a detectable neutrino flux in regions of…

Measurement of the semileptonic $B ˉ^{0} \to D^{*+} ℓ^{-} I^½_{ℓ}$ branching fraction with fully reconstructed $B$ meson decays and 34.6 fb $^{- 1}$ of Belle II data

Belle II Collaboration, F. Abudinen, I. Adachi +540

We present a first measurement of the $B^{0} ˉ \to D^{*+} ℓ^{-} I^½_{ℓ}$ branching fraction using fully reconstructed $B$ meson decays employing the Full Event Int…

Probing neutrino emission at GeV energies from compact binary mergers with the IceCube Neutrino Observatory

IceCube Collaboration, R. Abbasi, M. Ackermann +415

The advent of multi-messenger astronomy has allowed for new types of source searches by neutrino detectors. We present the results of the search for 0.5-100 GeV astrophysical neutr…

Observation of $B \to D^{(*)} K^{-} K_{S}^{0}$ decays using the 2019-2022 Belle II data sample

We present a measurement of the branching fractions of four $B^{0, -} \to D^{(*) +, 0} K^{-} K_{S}^{0}$ decay modes. The measurement is based on data from SuperKEKB electron-positron colli…

Search for $B^{+} \to K^{+} I^½ I^ˉ ½$ decays using an inclusive tagging method at Belle II

A search for the flavor-changing neutral-current decay $B^{+} \to K^{+} I^½ I^ˉ ½$ is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collide…

Measurement of the photon-energy spectrum in inclusive $B \to X_{s} I^^{3}$ decays identified using hadronic decays of the recoil $B$ meson in 2019-2021 Belle II data

We measure the photon-energy spectrum in radiative bottom-meson ( $B$ ) decays into inclusive final states involving a strange hadron and a photon. We use SuperKEKB electron-positron…

Measurements of the branching fractions for $B \to K^{*} I^^{3}$ decays at Belle II

This paper reports a study of $B \to K^{*} I^^{3}$ decays using $62.8 \pm 0.6$ fb $^{- 1}$ of data collected during 2019--2020 by the Belle II experiment at the SuperKEKB $e^{+} e^{-}$ asym…

astro-ph.IM2025

The LED calibration systems for the mDOM and D-Egg sensor modules of the IceCube Upgrade

R. Abbasi, M. Ackermann, J. Adams +432

The IceCube Neutrino Observatory, instrumenting about 1 km $^{3}$ of deep, glacial ice at the geographic South Pole, is due to be enhanced with the IceCube Upgrade. The IceCube Upgrad…

Rediscovery of $B^{0} \to J / I ¨ K_{L}^{0}$ at Belle II

We present preliminary results on the reconstruction of the $B^{0} \to J / I ¨ K_{L}^{0}$ decay, where $J / I ¨ \to I^¼^{+} I^¼^{-}$ or $…

Measurement of decay-time-dependent $CP$ violation in $B^{0} \to J / I ¨ K_{S}^{0}$ decays using 2019-2021 Belle II data

Belle II Collaboration, I. Adachi, L. Aggarwal +392

We report a measurement of the mixing-induced and direct $CP$ violation parameters $S_{CP}$ and $A_{CP}$ from $B^{0} \to J / I ¨ K_{S}^{0}$ decays reconstructed by the…

Angular analysis of $B^{+} \to I ¨ ^{+} I ¨ ^{0}$ decays reconstructed in 2019, 2020, and 2021 Belle II data

We report on a Belle II measurement of the branching fraction ( $B$ ), longitudinal polarization fraction ( $f_{L}$ ), and CP asymmetry ( $A_{C P}$ ) of $B^+\to Ï^+Ï^0…

First search for direct $C P$ -violating asymmetry in $B^{0} \to K^{0} I ¨ ^{0}$ decays at Belle II

We report on the first measurement of the direct $C P$ -violating asymmetry ( $A$ ) in the charmless decay $B^{0} \to K^{0} I ¨ ^{0}$ at Belle II and an updated measurement of its bra…

Limits on GeV-scale WIMP Annihilation in Dwarf Spheroidals with IceCube DeepCore

R. Abbasi, M. Ackermann, J. Adams +428

Dark matter is approximately five times more abundant than baryonic matter in the universe, but its physical nature continues to elude physicists. One potential candidate for dark…

Measurement of the branching fractions of $B \to I^\cdot^{'} K$ decays using 2019/2020 Belle II data

This note describes the rediscovery of $B \to I^\cdot^{'} K$ decays in Belle II data, both in the charged and neutral final state: $B_{0} \to I^\cdot^{'} K_{S}$ and $B^{\pm} \to I^\cdot^{'} K^{\pm}$ . The $I^\cdot^{'}$ is searc…

Studies of the semileptonic $B ˉ^{0} \to D^{*+} ℓ^{-} I^ˉ ½_{ℓ}$ and $B^{-} \to D^{0} ℓ^{-} I^ˉ ½_{ℓ}$ decay processes with 34.6 fb $^{- 1}$ of Belle II data

We report measurements of the $B ˉ^{0} \to D^{*+} ℓ^{-} I^ˉ ½_{l}$ and $B^{-} \to D^{0} ℓ^{-} I^ˉ ½_{l}$ processes using 34.6 fb $^{- 1}$ of collision events recorded by the Bell…

Seasonal Variations of the Atmospheric Muon Neutrino Spectrum measured with IceCube

R. Abbasi, M. Ackermann, J. Adams +425

This study presents an energy-dependent analysis of seasonal variations in the atmospheric muon neutrino spectrum, using 11.3 years of data from the IceCube Neutrino Observatory. B…

Measurements of branching fractions and direct $CP$ -violating asymmetries in $B^+ \to K^+ Ï^0~\mbox{and}~Ï^+ Ï^0$ decays using 2019 and 2020 Belle II data

We report measurements of branching fractions ( $B$ ) and direct $CP$ -violating asymmetries ( $A_{CP}$ ) for the decays $B^{+} \to K^{+} I ¨ ^{0}$ and $B^+ \to Ï^+Ï…

Study of Exclusive $B \to I ¨ e^{+} I^½_{e}$ Decays with Hadronic Full-event-interpretation Tagging in 189.3 fb $^{- 1}$ of Belle II Data

We present a reconstruction of the semileptonic decays $B^{0} \to I ¨ ^{-} e^{+} I^½_{e}$ and $B^{+} \to I ¨ ^{0} e^{+} I^½_{e}$ in a sample corresponding to 189.3 fb $^{- 1}$ of Belle II data, using even…

Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data

We report on first measurements of branching fractions~( $B$ ) and CP-violating charge asymmetries~( $A$ ) in charmless $B$ decays at Belle~II. We use a sample of e…

Limiting the Parameter Space for Unstable eV-scale Neutrinos Using IceCube Data

R. Abbasi, M. Ackermann, J. Adams +422

This Letter extends a recent IceCube sterile neutrino search to include unstable sterile neutrinos within the context of a model termed 3+1+Decay, which expands upon the 3+1 model…

Search for a $I ¨ ^{+} I ¨ ^{-}$ resonance in $e^{+} e^{-} \to I^¼^{+} I^¼^{-} I ¨ ^{+} I ¨ ^{-}$ events with the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +464

We report the first search for a non-standard-model resonance decaying into $I ¨ $ pairs in $e^{+} e^{-} \to I^¼^{+} I^¼^{-} I ¨ ^{+} I ¨ ^{-}$ events in the 3.6-10 GeV/ $c^{2}$ mass range.…

Constraining the Prompt Atmospheric Neutrino Flux Combining IceCube's Cascade and Track Samples

R. Abbasi, M. Ackermann, J. Adams +428

The IceCube Neutrino Observatory has observed a diffuse flux of high-energy astrophysical neutrinos for more than a decade. A relevant background to the astrophysical flux is promp…

Measurement of the inelasticity distribution of neutrino-nucleon interactions for $80 GeV < E_{I^} ½ < 560 GeV$ with IceCube DeepCore

IceCube Collaboration, R. Abbasi, M. Ackermann +425

We report a study of the inelasticity distribution in the scattering of neutrinos of energy $80 - 560$ GeV off nucleons. Using atmospheric muon neutrinos detected in IceCube's sub-ar…

Search for lepton-flavor-violating $I ¨ ^{-} \to ℓ^{-} I ¨ $ decays in 2019-2021 Belle II data

We report a search for lepton-flavor-violating decays $I ¨ ^{-} \to ℓ^{-} I ¨ $ ( $ℓ^{-} = e^{-}, I^¼^{-}$ ) at the Belle II experiment, using a sample of electron-positron data produced at the…