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4 results for au:Bartoszek_L in:hep-ph
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Ricardo Alarcon, Jim Alexander, Vassilis Anastassopoulos, Takatoshi Aoki, Rick Baartman, Stefan Baeßler, Larry Bartoszek, Douglas H. Beck, Franco Bedeschi, Robert Berger, Martin Berz, Hendrick L. Bethlem, Tanmoy Bhattacharya, Michael Blaskiewicz, Thomas Blum, Themis Bowcock, Anastasia Borschevsky, Kevin Brown, Dmitry Budker, Sergey Burdin, et al (123) Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well beyond those reached directly at high energy colliders. Discrimination between different physics models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss the current status and prospects in the near future for a compelling suite of such experiments, along with developments needed in the encompassing theoretical framework.
The focus of this paper is on optimizing the electron-antineutrino source for the IsoDAR (Isotope Decay at Rest) experimental program. IsoDAR will perform sensitive short-baseline neutrino oscillation and electroweak measurements, among other Beyond Standard Model searches, in combination with KamLAND and/or other suitable detectors. IsoDAR will rely on the high-$Q$ $\beta^-$ decay of the $^{8}$Li isotope for producing electron-antineutrinos, created mainly via neutron capture in an isotopically enriched $^{7}$Li sleeve surrounding the Be target. In particular, this paper examines the performance, defined in terms of absolute $^{8}$Li (or, equivalently, electron-antineutrino) production rate, of various candidate sleeve materials, including a lithium-fluoride, beryllium-fluoride mixture ("FLiBe") sleeve and a homogeneous mixture of lithium and beryllium ("Li-Be"). These studies show that the $^{8}$Li yield can be increased substantially by employing a Li-Be sleeve and therefore motivate significant changes to the nominal IsoDAR design.
LBNE Collaboration, Corey Adams, David Adams, Tarek Akiri, Tyler Alion, Kris Anderson, Costas Andreopoulos, Mike Andrews, Ioana Anghel, João Carlos Costa dos Anjos, Maddalena Antonello, Enrique Arrieta-Diaz, Marina Artuso, Jonathan Asaadi, Xinhua Bai, Bagdat Baibussinov, Michael Baird, Baha Balantekin, Bruce Baller, Brian Baptista, et al (466) The preponderance of matter over antimatter in the early Universe, the dynamics of the supernova bursts that produced the heavy elements necessary for life and whether protons eventually decay --- these mysteries at the forefront of particle physics and astrophysics are key to understanding the early evolution of our Universe, its current state and its eventual fate. The Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed plan for a world-class experiment dedicated to addressing these questions. LBNE is conceived around three central components: (1) a new, high-intensity neutrino source generated from a megawatt-class proton accelerator at Fermi National Accelerator Laboratory, (2) a near neutrino detector just downstream of the source, and (3) a massive liquid argon time-projection chamber deployed as a far detector deep underground at the Sanford Underground Research Facility. This facility, located at the site of the former Homestake Mine in Lead, South Dakota, is approximately 1,300 km from the neutrino source at Fermilab -- a distance (baseline) that delivers optimal sensitivity to neutrino charge-parity symmetry violation and mass ordering effects. This ambitious yet cost-effective design incorporates scalability and flexibility and can accommodate a variety of upgrades and contributions. With its exceptional combination of experimental configuration, technical capabilities, and potential for transformative discoveries, LBNE promises to be a vital facility for the field of particle physics worldwide, providing physicists from around the globe with opportunities to collaborate in a twenty to thirty year program of exciting science. In this document we provide a comprehensive overview of LBNE's scientific objectives, its place in the landscape of neutrino physics worldwide, the technologies it will incorporate and the capabilities it will possess.
A. Bungau, A. Adelmann, J.R. Alonso, W. Barletta, R. Barlow, L. Bartoszek, L. Calabretta, A. Calanna, D. Campo, J.M. Conrad, Z. Djurcic, Y. Kamyshkov, M.H. Shaevitz, I. Shimizu, T. Smidt, J. Spitz, M. Wascko, L.A. Winslow, J.J. Yang This paper introduces a novel, high-intensity source of electron antineutrinos from the production and subsequent decay of 8Li. When paired with an existing ~1 kton scintillator-based detector, this <E_\nu>=6.4 MeV source opens a wide range of possible searches for beyond standard model physics via studies of the inverse beta decay interaction. In particular, the experimental design described here has unprecedented sensitivity to electron antineutrino disappearance at $\Delta m^2\sim$ 1 eV$^2$ and features the ability to distinguish between the existence of zero, one, and two sterile neutrinos.