Results 1 to 10 of about 1,105,380 (358)

Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays [PDF]

open access: yesJournal of High Energy Physics, 2017
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B 0 → K *0 μ + μ − and B 0 → K *0 e + e − decays, $$ {R}_{K^{*0}} $$ , is presented.
Gerhard Raven
exaly   +2 more sources

Two Universality Classes for the Many-Body Localization Transition [PDF]

open access: yesPhysical Review Letters, 2017
We provide a systematic comparison of the many-body localization (MBL) transition in spin chains with nonrandom quasiperiodic versus random fields. We find evidence suggesting that these belong to two separate universality classes: the first dominated by
Vedika Khemani, D N Sheng
exaly   +2 more sources

Test of lepton universality in beauty-quark decays [PDF]

open access: yesNature Physics, 2021
The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction ...
L. C. R. Aaij   +499 more
semanticscholar   +1 more source

A Toy Model of Universality: Reverse Engineering How Networks Learn Group Operations [PDF]

open access: yesInternational Conference on Machine Learning, 2023
Universality is a key hypothesis in mechanistic interpretability -- that different models learn similar features and circuits when trained on similar tasks.
Bilal Chughtai   +2 more
semanticscholar   +1 more source

Test of Lepton Universality in b→sℓ^{+}ℓ^{-} Decays. [PDF]

open access: yesPhysical Review Letters, 2022
The first simultaneous test of muon-electron universality using B^{+}→K^{+}ℓ^{+}ℓ^{-} and B^{0}→K^{*0}ℓ^{+}ℓ^{-} decays is performed, in two ranges of the dilepton invariant-mass squared, q^{2}.
R. Aaij   +499 more
semanticscholar   +1 more source

Enhancing the Self-Universality for Transferable Targeted Attacks [PDF]

open access: yesComputer Vision and Pattern Recognition, 2022
In this paper, we propose a novel transfer-based targeted attack method that optimizes the adversarial perturbations without any extra training efforts for auxiliary networks on training data.
Zhipeng Wei   +3 more
semanticscholar   +1 more source

Kardar–Parisi–Zhang universality in a one-dimensional polariton condensate [PDF]

open access: yesNature, 2021
Revealing universal behaviours is a hallmark of statistical physics. Phenomena such as the stochastic growth of crystalline surfaces1 and of interfaces in bacterial colonies2, and spin transport in quantum magnets3–6 all belong to the same universality ...
Q. Fontaine   +16 more
semanticscholar   +1 more source

Universal inference [PDF]

open access: yesProceedings of the National Academy of Sciences, 2020
Significance Most statistical methods rely on certain mathematical conditions, known as regularity assumptions, to ensure their validity. Without these conditions, statistical quantities like P values and confidence intervals might not be valid.
Larry Wasserman   +2 more
openaire   +4 more sources

Universality Laws for High-Dimensional Learning With Random Features [PDF]

open access: yesIEEE Transactions on Information Theory, 2020
We prove a universality theorem for learning with random features. Our result shows that, in terms of training and generalization errors, a random feature model with a nonlinear activation function is asymptotically equivalent to a surrogate linear ...
Hong Hu, Yue M. Lu
semanticscholar   +1 more source

Perceptions of and barriers to ethical promotion of pharmaceuticals in Pakistan: perspectives of medical representatives and doctors

open access: yesBMC Medical Ethics, 2021
Background In Pakistan, drug promotion practices, ethical or unethical, have rarely been in the spotlight. We aimed to assess the perception and barriers of medical representatives (MRs) and doctors (MDs) regarding ethical promotion of pharmaceuticals in
Rehan Gul   +8 more
doaj   +1 more source

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