Past Workshops & Meetings

Monday, August 3, 2020 - 9:00am to Thursday, August 6, 2020 - 5:00pm

ACFI Online

We hope to collectively orient the theoretical and phenomenological communities via an invitational forum, focusing on strategy for the forthcoming Snowmass process and influencing the proceeding, highly developmental years within the field in order to better serve the experimental community interested in baryon number violation (BNV), and more specifically, BNV by two units (ΔB=2), a B-L violating possibility. This looks forward to the application of theoretical ideas to the interpretation of future measurements made by the ESS NNBar Collaboration, DUNE, PNPI Gatchina, and Hyper-Kamiokande in the realm of dinucleon decay and neutron-antineutron transformations (n→n ̅). These ideas can be applied to existing and future theoretical and experimental studies, bolstering the community’s fundamental understanding of the topic.

Joshua Barrow (University of Tennessee)
Leah Broussard (Oak Ridge National Laboratory)
Jordy de Vries (University of Massachusetts Amherst/Riken Brookhaven)
Michael Wagman (Fermi National Accelerator Laboratory)

Thursday, April 2, 2020 - 9:00am to Saturday, April 4, 2020 - 1:00pm


Proton decay experiments strongly constrain models in which baryon number is violated. Typical models must be associated to very high-energy scales to be viable, making them hard to probe with independent methods. An interesting class of models, which has gained significant attention in recent years, still violate baryon number but only by two units such that the proton remains stable. The last years have seen interesting developments in the associated particle, hadronic, and nuclear theory and the connection to outstanding cosmological problems such as the matter-antimatter asymmetry. In addition, future measurements made by the ESS NNBar Collaboration, DUNE, PNPI Gatchina, and Hyper-Kamiokande in the realm of dinucleon decay and neutron-antineutron transformations have real discovery potential.

In this focused workshop, we wish to bring together practitioners of the various communities, both theoretical and experimental, to discuss what are the challenges and prospects for the detection of baryon number violation in the near future, and what would be the implication of signals or lack thereof.

Joshua Barrow (Fermilab)
Leah Broussard (Oak Ridge National Lab)
Jordy de Vries (UMass Amherst)
Michael Wagman (MIT)

Monday, October 21, 2019 - 9:00am to Wednesday, October 23, 2019 - 5:00pm

LGRT 1033

The swampland program is an extremely rapidly growing topic in formal particle theory. The goal of the program is to identify universal features of quantum gravities, with the potential to generate experimentally testable predictions.

Ben Heidenreich (UMass Amherst)
Matteo Lotito (UMass Amherst)
Daniel Harlow (Massachusetts Institute of Technology)
Matthew Reece (Harvard University)
Irene Valenzuela (Harvard University)

Thursday, May 16, 2019 - 9:00am to Saturday, May 18, 2019 - 1:00pm


Tests of the unitarity constraint on the first row of the CKM matrix continue to provide powerful probe of physics beyond the Standard Model. The effectiveness of this probe relies on having sufficiently precise measurements and theoretical, Standard Model computations. This workshop will address the following questions: What is the status of the first-row CKM unitarity constraint? What is the status of radiative and nuclear/hadronic structure-dependent corrections that underly that test? A particular focus will be on arriving at a clear picture of the present level of theoretical uncertainty in extracting the value of V_ud from experiment and on strategies to reduce it. An additional emphasis will fall on obtaining a consensus for present determination of V_us. We will gather the world experts for providing a complete and in-depth review of all crucial theoretical and experimental ingredients.

Mikhail Gorshteyn (Mainz University)
John Hardy (Texas A&M University)
Michael Ramsey-Musolf (UMass Amherst & Tsung-Dao Lee Institute, Shanghai Jiao-Tong University)
Chien Yeah Seng (Bonn University)

Thursday, April 25, 2019 - 9:00am to Saturday, April 27, 2019 - 1:00pm


Neutrino-electron interactions at low energies can reveal interesting new physics in the neutrino sector. Electromagnetic neutrino properties have broad implications, casting light on the Majorana vs Dirac question and perhaps suggesting new particles or couplings. We are now entering an exciting era of increased experimental sensitivity to such couplings, as dark matter experiments at the keV scale become dominated by solar neutrinos, and as massive bolometric sensors achieve eV-scale thresholds. The goal of this workshop is to bring together a diverse cross section of interested researchers (theorists, experimentalists, and astrophysicists) to discuss motivations, implications, existing constraints, and future opportunities.

Shao-Feng Ge (Kavli IPMU & UC Berkeley)
Scott Hertel (UMass Amherst)
Andrea Pocar (UMass Amherst)