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Open Access Policy Deposits

This series is automatically populated with publications deposited by Berkeley Law researchers in accordance with the University of California’s open access policies. For more information see Open Access Policy Deposits and the UC Publication Management System.

Cover page of The Death Penalty’s Dirty Little Secret

The Death Penalty’s Dirty Little Secret

(2013)
Cover page of Editorial

Editorial

(2006)
Cover page of Courts and the Penal State: Lessons from California’s Decades of Prison Litigation and Expansion

Courts and the Penal State: Lessons from California’s Decades of Prison Litigation and Expansion

(2013)
Cover page of Theorizing Transnational Fiduciary Law

Theorizing Transnational Fiduciary Law

(2020)

This symposium Article theorizes and assesses transnational legal ordering of fiduciary law. Fiduciary law imposes legally enforceable duties on those entrusted with discretionary authority over the interests of others. The fiduciary law of a state may apply to fiduciary relationships having a transnational (or even global) scope. Fiduciary norms themselves are transnational to the extent that they settle as governing legal norms in ways that transcend and permeate state boundaries. Curiously, however, fiduciary legal theory and transnational legal theory have yet to meet. This symposium takes the first steps towards a comprehensive theory of transnational fiduciary law. To assess transnational legal ordering of fiduciary law, one must study the extent of normative settlement across state boundaries. This can be done in terms of a meta concept of fiduciary law involving a transnational body of law, or in terms of the processes that give rise to discrete domains of fiduciary law to address particular problems as understood by relevant actors. Comparative legal analysis is critical for assessing the extent of concordance and divergence in the development and practice of fiduciary law across states. This Article introduces symposium articles that assess transnational fiduciary law as a meta concept; transnational legal ordering of fiduciary law in discrete domains; and comparative fiduciary law. Together, these articles suggest that processes of transnational legal ordering can give rise to transnational fiduciary law and the potential development of discrete transnational legal orders that transcend and permeate nation-states.

Cover page of ERISA Preemption of State and Local Laws on Domestic Partnership and Sexual Orientation Discrimination in Employment

ERISA Preemption of State and Local Laws on Domestic Partnership and Sexual Orientation Discrimination in Employment

(1998)

[No abstract]

Search for heavy right-handed Majorana neutrinos in the decay of top quarks produced in proton-proton collisions at s=13  TeV with the ATLAS detector

(2024)

A search for heavy right-handed Majorana neutrinos is performed with the ATLAS detector at the CERN Large Hadron Collider, using the 140  fb−1 of proton–proton collision data at s=13  TeV collected during Run 2. This search targets tt¯ production, in which both top quarks decay into a bottom quark and a W boson, where one of the W bosons decays hadronically and the other decays into an electron or muon and a heavy neutral lepton. The heavy neutral lepton is identified through a decay into an electron or muon and another W boson, resulting in a pair of same-charge same-flavor leptons in the final state. This paper presents the first search for heavy neutral leptons in the mass range of 15–75 GeV using tt¯ events. No significant excess is observed over the background expectation, and upper limits are placed on the signal cross sections. Assuming a benchmark scenario of the phenomenological type-I seesaw model, these cross section limits are then translated into upper limits on the mixing parameters of the heavy Majorana neutrino with Standard Model neutrinos. © 2024 CERN, for the ATLAS Collaboration 2024 CERN

Software Performance of the ATLAS Track Reconstruction for LHC Run 3

(2024)

Charged particle reconstruction in the presence of many simultaneous proton–proton (pp) collisions in the LHC is a challenging task for the ATLAS experiment’s reconstruction software due to the combinatorial complexity. This paper describes the major changes made to adapt the software to reconstruct high-activity collisions with an average of 50 or more simultaneous pp interactions per bunch crossing (pile-up) promptly using the available computing resources. The performance of the key components of the track reconstruction chain and its dependence on pile-up are evaluated, and the improvement achieved compared to the previous software version is quantified. For events with an average of 60pp collisions per bunch crossing, the updated track reconstruction is twice as fast as the previous version, without significant reduction in reconstruction efficiency and while reducing the rate of combinatorial fake tracks by more than a factor two.

Cover page of Deep Generative Models for Fast Photon Shower Simulation in ATLAS

Deep Generative Models for Fast Photon Shower Simulation in ATLAS

(2024)

The need for large-scale production of highly accurate simulated event samples for the extensive physics programme of the ATLAS experiment at the Large Hadron Collider motivates the development of new simulation techniques. Building on the recent success of deep learning algorithms, variational autoencoders and generative adversarial networks are investigated for modelling the response of the central region of the ATLAS electromagnetic calorimeter to photons of various energies. The properties of synthesised showers are compared with showers from a full detector simulation using geant4. Both variational autoencoders and generative adversarial networks are capable of quickly simulating electromagnetic showers with correct total energies and stochasticity, though the modelling of some shower shape distributions requires more refinement. This feasibility study demonstrates the potential of using such algorithms for ATLAS fast calorimeter simulation in the future and shows a possible way to complement current simulation techniques.

Combination of searches for singly and doubly charged Higgs bosons produced via vector-boson fusion in proton–proton collisions at s = 13 TeV with the ATLAS detector

(2024)

Search for R-parity violating supersymmetric decays of the top squark to a b-jet and a lepton in s=13 TeV pp collisions with the ATLAS detector

(2024)

A search is presented for direct pair production of the stop, the supersymmetric partner of the top quark, in a decay through an R-parity violating coupling to a charged lepton and a b-quark. The dataset corresponds to an integrated luminosity of 140  fb−1 of proton-proton collisions at a center-of-mass energy of s=13  TeV collected between 2015 and 2018 by the ATLAS detector at the LHC. The final state has two charged leptons (electrons or muons) and two b-jets. The results of the search are interpreted in the context of a Minimal Supersymmetric Standard Model with an additional B−L gauge symmetry that is spontaneously broken. No significant excess is observed over the Standard Model background, and exclusion limits on stop pair production are set at 95% confidence level. The corresponding lower limits on the stop mass for 100% branching ratios to a b-quark and an electron, muon, or tau-lepton are 1.9 TeV, 1.8 TeV and 800 GeV, respectively, extending the reach of previous LHC searches. © 2024 CERN, for the ATLAS Collaboration 2024 CERN

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