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2022-05-25, 9:15 a.m.
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Petr Navratil (TRIUMF)2022-05-25, 9:30 a.m.
I will present an overview of experiments at TRIUMF ARIEL and ISAC facilities covering both the current and the future envisioned programs. I will also briefly review theory program at TRIUMF that relates to the ARIEL experimental program. I will highlight several recent experimental results from the nuclear astrophysics, nuclear structure, fundamental symmetries, and the sterile neutrino...
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Thomas Planche (TRIUMF)2022-05-25, 10:00 a.m.
I will present a brief overview of TRIUMF's accelerator complex, focusing particularly on the ARIEL facility and its high-power electron accelerator: the e-linac. I will detail its design parameters, review the current performance of the machine, and show how the DarkLight experiment could be integrated into our beamlines.
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Achille Stocchi2022-05-25, 10:30 a.m.
The development of ERLs has been recognized as one of the five main pillars of accelerators R&D in support of the European Strategy for Particle Physics (ESPP). The ERL Roadmap Panel recognized PERLE project as “a central part of the roadmap for the development of energy-recovery linacs”, with milestones to be achieved by the next ESPP in 2026.
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PERLE at Orsay is a project aiming at the... -
Toshimi Suda2022-05-25, 11:15 a.m.
I will introduce low-energy electron scattering facilities for nuclear physics that we have constructed in Japan.
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1) SCRIT facility at RIKEN RI Beam Factory
(SCRIT : Self-Confining Radioactive-isotope Ions Target)
the world’s first electron scattering facility dedicated to short-lived exotic nuclei. Ee = 150 - 300 MeV, q = 80 - 300 MeV/c.
Luminosity ~ 1027 /cm2/s with NRI ~ 108/s.
ISOL... -
Steve Benson2022-05-25, 11:45 a.m.
Operation of an Energy Recovery Linac with an Internal Target
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Stephen V. Benson1 and David R. Douglas2
1Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
2David R. Douglas Consulting, Yorktown VA 23690, USA
felman@jlab.org
Because an Energy Recovery Linac (ERL) decelerates and dumps the beam on each pass, beam degradation in the interaction region orders of... -
7. Status for beam and perspectives for applications at the SRF photoinjector of the Sealab facilityThorsten Kamps2022-05-25, 2:00 p.m.
In the first part the talk rationalizes the SRF photoinjector design of the bERLinPRo/SEALab facility at HZB. A brief history ending at the current status of the experiments is given. The talk concludes then with scientific opportunities currently under consideration for beam applications.
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Florian Hug2022-05-25, 2:30 p.m.
MESA is a recirculating superconducting accelerator under construction at Johannes Gutenberg-Universität Mainz. It can be operated in either external beam or ERL mode and will be used for high precision particle and nuclear physics experiments and will be a fully instrumented ERL user facility with three major experiments after completion. The operating cw beam current and energy in EB mode is...
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2022-05-25, 3:15 p.m.
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Attila Krasnahorkay2022-05-26, 9:30 a.m.
A few years ago we observed anomalous electron-positron angular correlations for the 18.15~MeV M1 transition of 8Be [1]. This was interpreted as the creation and decay of an intermediate bosonic particle with a mass of m0c2=16.70(35)(stat)(50)(sys) MeV, which is now called X17. The possible relation of the X17 boson to the dark matter problem triggered an enormous interest in the wider...
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Georges Azuelos2022-05-26, 10:00 a.m.
At the Montreal Tandem accelerator, an experiment is being setup to measure internal pair creation in 8Be, using a Daphne experiment MWPC and the scintillator bars surrounding it, covering nearly 4-pi. The preamps and data acquisition hardware have been designed and tested. The target, mounted on an Al foil and water-cooled is in a section of the beamline made of C fiber. The experiment will...
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Michele Viviani (INFN-Pisa)2022-05-26, 10:30 a.m.
A rather puzzling anomaly has been recently observed in the emission of electron-positron pairs in the 7Li(p,e+e-)8Be and 3H(p,e+e-)4He reactions [1,2]. This anomaly has been interpreted as the signature of a particle not foreseen in the standard model of particle physics (hereafter X17 boson) with mass M=16.8 MeV. The X17 boson could be a mediator of a fifth force, characterized by a strong...
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Rodolfo Capdevilla2022-05-26, 11:15 a.m.
We study new physics scenarios that resolve the muon (g − 2)μ anomaly with only Standard Model singlet particles coupled to muons. Since such models are only viable in the MeV – TeV mass range and require sizable muon couplings, they predict abundant accelerator production through the same interaction that resolves the anomaly. We show that B-factories and high energy colliders can...
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Christopher Hearty (U. British Columbia/IPP)2022-05-26, 11:45 a.m.
The dark photon could mediate interactions between dark matter particles, and, through its kinetic mixing with the standard model photon, interact with standard model particles. I will review recent results on accelerator-based searches for dark photons decaying visibly to standard model particles, or invisibly to dark matter. I will also briefly discuss projected sensitivities from current...
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Michael Kohl (Hampton University)2022-05-26, 1:15 p.m.
Lepton universality (LU) typically refers to the lepton coupling,
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which is considered to be the same for e and mu if the interaction is
electroweak according to the Standard Model, and it is hence a compelling
probe for New Physics.
The same principle of universal electroweak lepton interaction leads
to the expectation that lepton scattering yields are equal for e and mu
under the same... -
18. New opportunities for the study of baryon-number violation with low-energy electron acceleratorsSusan Gardner2022-05-26, 1:45 p.m.
The severity of the experimental limits on proton decay does not preclude the appearance of processes that break baryon number by two units at an appreciable rate, and their experimental signatures in low-energy experiments are so striking as to be ``background free.'' I will consider the connections between various such processes and their implications, noting, e.g., that the observation of...
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Adam Ritz2022-05-26, 2:15 p.m.
Over the past decade, a growing effort using accelerators and direct detection has explored the parameter space of light thermal relic dark matter models in the MeV-GeV range and their associated dark force mediators. I will briefly review the current status, focussing on the lower end of this mass window, and discuss theoretical scenarios, astrophysical and cosmological constraints, and...
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Douglas Bryman (UBC/TRIUMF)2022-05-26, 3:00 p.m.
An overview of searches for violation of lepton flavor universality will be presented with focus on low energy precision probes using pions, kaons, tau leptons, and beta decays related through unitarity tests of the CKM quark mixing matrix. The current status and future prospects including the new PIONEER rare pion decay experiment will be discussed.
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Ulrich Jentschura2022-05-26, 3:30 p.m.
The proton radius puzzle is known as the discrepancy of the proton radius, obtained from muonic hydrogen spectroscopy (about 0.84fm), and the proton radius obtained from (ordinary) hydrogen spectroscopy by the Paris group, who measured a number of transitions in atomic hydrogen, involving highly excited states (which led to a radius of 0.88fm). Recently, a number of measurements of hydrogen...
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Bishoy Dongwi2022-05-26, 4:00 p.m.
The Standard Model (SM) represents our best description of the sub- atomic world and has been very successful in explaining how elementary particles interact under the influence of the fundamental forces. Despite its far reaching success in describing the building blocks of matter, the SM is still incomplete; falling short to explain dark matter, baryogenesis, neutrino masses and much more....
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Jeffery Martin (The University of Winnipeg), Jeffery Martin (The University of Winnipeg)2022-05-26, 4:30 p.m.
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Luca Doria2022-05-27, 9:30 a.m.
The Mainz Energy recovery superconducting accelerator MESA will allow precise
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measurements in hadron and nuclear physics, as well as exciting opportunities
in dark matter searches. Three experiments will be built around this new and unique
facility: MAGIX, P2, and DarkMESA. In this talk, the MESA science program will be presented,
with focus on dark matter and new physics searches. -
Norbert Pietralla2022-05-27, 10:00 a.m.
The Superconducting-Darmstadt linear accelerator (S-DALINAC) is operational at the Technische Universität Darmstadt and represents the major research instrument at its institute for nuclear physics.
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Its research program focuses an precision studies of photonuclear reactions with real and virtual photons at low momentum transfers and impacts on various fields ranging from nuclear structure... -
Ethan Cline2022-05-27, 10:30 a.m.
The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched for such a particle, but so far it has proven elusive. In recent years the concept of a low mass dark photon has gained popularity in the physics community. Of particular recent interest is the ^8Be and ^4He anomaly,...
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Wolfgang Mittig2022-05-27, 11:15 a.m.
Four types of recent and ongoing experiments will be described: Resonances near threshold in the 10Be+proton system, search for dark decay in 11B and 6He (ongoing), the
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pair creation in the 7Li+p and the X17 boson (ongoing), and multi-particle decay near threshold. -
Ivica Friščić (University of Zagreb, PMF-FO)2022-05-27, 11:45 a.m.
After more than five decades of experimental effort the rate of 𝛼 on 12C radiative capture at astrophysical energies (𝐸𝑐𝑚 ~ 0.3 MeV above threshold) is not determined with desired precision and it is a cause of the largest uncertainty contribution in modeling of evolution of massive stars and underlying nucleosynthesis. By using the windowless gas jet target and modern energy-recovery linear...
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2022-05-27, 12:15 p.m.
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Ethan Cline (Stony Brook University)
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