Potential Fermilab Muon Campus & Storage Ring Experiments

Jason Crnkovic (University of Mississippi), Sudeshna Ganguly (Fermilab), Diktys Stratakis (Fermi National Accelerator Laboratory)

This workshop provides a venue for exploring ideas to build short-, medium-, and long-term muon- and non-muon-based experiments that will have a small incremental cost on top of existing infrastructure investments. The goal of this workshop is to promote the development of proposals for the current Snowmass exercise.


The Snowmass timeline has been delayed due to the COVID pandemic and activities are paused until June.  Please see Snowmass Announcements for details.


Abstract submission deadline is Apr 26, 2021.

Registration deadline is May 10, 2021.

  • Aakaash Narayanan
  • Abel Lorente Campos
  • Adam Lyon
  • Adam Schreckenberger
  • Aida El-Khadra
  • Alex Keshavarzi
  • Alexey Petrov
  • Andre de Gouvea
  • Andrew Edmonds
  • Andrew Sutton
  • Anna Driutti
  • Anna Mazzacane
  • Antonio Gioiosa
  • Arnaldo Vargas
  • Atanu Nath
  • Becky Chislett
  • Bertrand Echenard
  • Bradley Roberts
  • Breese Quinn
  • Brendan Casey
  • Brendan Kiburg
  • Carol Johnstone
  • Charles Jenkins
  • Cole Kampa
  • Corrado Gatto
  • Cristina Ana Mantilla Suarez
  • Daniel Kaplan
  • Dave Pushka
  • David G. Hitlin
  • David Hertzog
  • David Koltick
  • David Tarazona
  • Diktys Stratakis
  • Dinko Pocanic
  • Dominik Stoeckinger
  • Eduard Pozdeyev
  • Emilio Royo
  • Eremey Valetov
  • Esra Barlas-Yucel
  • Faith Bergin
  • Frank Porter
  • Frederick Gray
  • Frederique Pellemoine
  • Gavin Hesketh
  • Gianantonio Pezzullo
  • Gordan Krnjaic
  • Graziano Venanzoni
  • Hoai Nam Tran
  • Hogan Nguyen
  • Iftah Galon
  • James Miller
  • James Morgan
  • Jason Crnkovic
  • Javier Duarte
  • Jayakar Thangaraj
  • Jessica Esquivel
  • Joe Price
  • Joel Butler
  • John Johnstone
  • Jordy de Vries
  • Julian Heeck
  • Karie Badgley
  • Katsuya Yonehara
  • Keith Gollwitzer
  • Kevin Labe
  • Kevin Lynch
  • Kevin Pitts
  • Kim-Siang Khaw
  • Leo Borrel
  • Luciano Elementi
  • Manolis Kargiantoulakis
  • marco incagli
  • Martin Fertl
  • Mary Convery
  • Massimo Passera
  • Matthew Reece
  • Meghna Bhattacharya
  • Mete Yucel
  • Michael Syphers
  • Nandhini Dhanaraj
  • Nandita Raha
  • Nhan Tran
  • Nikolai Mokhov
  • Nilay Bostan
  • Oleksandr Tomalak
  • On Kim
  • Patrick Fox
  • Paul Debevec
  • Pavel Snopok
  • Peter Cameron
  • Peter Kammel
  • Peter Winter
  • Priscilla Cushman
  • Riccardo Nunzio Pilato
  • Ritwika Chakraborty
  • Robert Bernstein
  • Robert Shrock
  • Robert Tschirhart
  • Robert Zwaska
  • Robyn Madrak
  • Samuel Grant
  • Samuel Homiller
  • Saskia Charity
  • Sergo Jindariani
  • Shihua Huang
  • Simon Corrodi
  • Simona Giovannella
  • Simone Donati
  • Sophie Middleton
  • Stefan E. Mueller
  • Stefano Miscetti
  • Steven Boi
  • Sudeshna Ganguly
  • Tim Gorringe
  • Vincenzo Cirigliano
  • Vladimir Shiltsev
  • William Morse
  • Yannis Semertzidis
  • Yiming Zhong
  • Yonatan Kahn
  • Yongbin Feng
  • Yun He
Sudeshna Ganguly
    • 1
      Welcome from Fermilab
      Speaker: Kevin Pitts (Fermilab/University of Illinois)
    • Muon g-2 Negative Muon Running & Dedicated EDM: Introduction

      Session Chairs: Saskia Charity (Fermilab) and Breese Quinn (University of Mississippi)

      Conveners: Breese Quinn (University of Mississippi), Saskia Charity
    • 2
      Muon g-2 & EDM theory motivation
      Speaker: Dominik Stoeckinger (TU Dresden)
    • 3
      Lorentz Invariance & CPT symmetry theory motivation

      The prospects for testing Lorentz and CPT symmetry in muon g-2 experiments are presented. Using muons for testing Lorentz and CPT symmetry is essential as existing constraints on muon Lorentz- and CPT-violating operators comprise only a small fraction of the available limits. Possible signals for Lorentz and CPT violation in g-2 experiments include annual and sidereal variations of the spin-precession frequency. The advantages of performing negative muon measurements are considered. Fermilab and J-PARC experiments are sensitive to slightly different combinations of Standard-Model Extension (SME) coefficients. A discussion about the relative advantages of both experiments is included.

      Speaker: Arnaldo Vargas (Loyola University New Orleans)
    • 4
      AP0 target station capabilities & status/Muon Campus Operations for negative muon & dedicated EDM measurements
      Speaker: James Morgan (FNAL)
    • 5
      Estimating target performance for negative muon production
      Speaker: Eremey Valetov (SJTU / MSU)
    • 6
      A Dedicated Muon EDM Experiment in the Muon `g-2’ Ring

      With the recent first results of Fermilab Muon g-2 experiment, the discrepancy from theory of the measured magnetic dipole moment (MDM) of the muon looks even more persistent, and there is much motivation to search for new physics in spin precession experiments. We present initial studies into the possibility of using a modified version of the Muon g-2 storage ring to search for a non-zero muon EDM. Using both electric and magnetic fields to produce a "frozen spin" condition for the MDM, while enhancing precession due to an EDM, the storage ring would operate at a lower central muon momentum than for the g-2 measurement, which can be obtained using high intensity beam from the PIP-II linear accelerator. Preliminary calculations and simulation results of beam production at 800 MeV, plus the determination of the closed orbit inside the hybrid ring configuration muon beam are presented. The possible operational range in momentum and energy of muons and their respective window of electric and magnetic field values shall be presented. Challenges in the pursuance of this technique and systematic errors inherent in this approach are discussed.

      Speaker: Aakaash Narayanan
    • 9:54 AM
      Coffee Break
    • 7
      Panel discussion on Muon g-2 Negative Muon Running

      Moderators: Saskia Charity (Fermilab), Breese Quinn (University of Mississippi)
      Panelists: Jim Morgan (Fermilab), Hogan Nguyen (Fermilab), Brendan Kiburg (Fermilab), Dave Hertzog (University of Washington)

      Speakers: Breese Quinn (University of Mississippi), Brendan Kiburg (Fermilab), David Hertzog (University of Washington), Hogan Nguyen (Fermilab), James Morgan (FNAL)
    • 8
      Panel Discussion on dedicated EDM measurement

      Moderators: Saskia Charity (Fermilab), Breese Quinn (University of Mississippi)
      Panelists: Brendan Casey (Fermilab), Peter Winter (Argonnr National Laboratory), Joe Price (University of Liverpool), Becky Chislett (University College London)

      Speakers: Brendan Casey (FNAL), Joe Price (Univ. of Liverpool), Peter Winter (Argonne National Laboratory), Rebecca Chislett
    • Muon g-2 Negative Muon Running & Dedicated EDM: Open Discussion

      Session Chairs: Saskia Charity (Fermilab) and Breese Quinn (University of Mississippi)

      Conveners: Breese Quinn (University of Mississippi), Saskia Charity
    • Storage Ring Experiments: Introduction

      Session Chairs: Esra Barlas Yucel (University of Illinois at Urbana-Champaign) and Andre Luiz De Gouvea (Northwestern University)

      Conveners: Andre de Gouvea (Northwestern University), Esra Barlas-Yucel (University of Illinois at Urbana-Champaign)
    • 9
      Panel discussion on charged pion lifetime, radiative muon decay, muon neutrino mass, and Proton/Deuteron EDM theory motivation

      Moderators: Esra Barlas Yucel (University of Illinois at Urbana-Champaign), Andre Luiz De Gouvea (Northwestern University)

      Panelists: Jordy de Vries (University of Massachusetts Amherst), Vincenzo Cirigliano (Los Alamos National Laboratory), Robert Shrock (Stony brook university), Massimo Passera (INFN)

      Speakers: Jordy de Vries (UMass), Massimo Passera (INFN Padova), Robert Shrock (C. N. Institute for Theoretical Physics, Stony Brook University), Vincenzo Cirigliano (Los Alamos National Laboratory)
    • 10
      Muon neutrino mass measurement
      Speaker: Priscilla Cushman (University of Minnesota)
    • 11
      Pion lifetime measurement
      Speaker: Tim Gorringe (Univ of Kentucky)
    • 9:40 AM
      Coffee Break
    • 12
      Radiative muon decay measurement
      Speaker: Prof. Kim-Siang Khaw (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)
    • 13
      Physics options with negative muons, polarized proton and deuteron beams in the muon g-2 ring

      Running with negative muons presents a special challenge due to the very strict vacuum requirements operating the electrostatic quadrupoles. We revisit the option of using magnetic focusing with the added benefit of an RF system, first proposed by Yuri Orlov in the sixties, to reduce the momentum dispersion effect to the required level. In that case, we could also include polarized proton beams to map the magnetic field of the storage region directly.
      Finally, we will explore the options of launching frozen-spin proton and deuteron EDM experiments using this ring. Interestingly, the muon g-2 ring offers a unique geometry for reduced systematic error levels, enough to make them highly competitive to the neutron EDM experiments under current consideration.

      Speaker: Yannis Semertzidis (Physics Department, KAIST)
    • 14
      Proton EDM
      Speaker: William Morse (BNL)
    • 15
      Muon Campus operations for pion
      Speaker: James Morgan (FNAL)
    • Storage Ring Experiments: Open Discussion

      Session Chairs: Esra Barlas Yucel (University of Illinois at Urbana-Champaign) and Andre Luiz De Gouvea (Northwestern University)

      Conveners: Andre de Gouvea (Northwestern University), Esra Barlas-Yucel (University of Illinois at Urbana-Champaign)
    • Muon Campus Experiments: Introduction

      Session Chairs: David Tarazona (University of Liverpool) and Mary Convery (Fermilab)

      Conveners: David Tarazona (University of Liverpool), Mary Convery (Fermilab)
    • 16
      Particle Beams for the REDTOP Experiment

      The existing and possible future facilities available at the Fermilab accelerator complex allow for new experiments aimed at studying rare meson decays with high statistics. The existing Delivery Ring could be modified in order to provide a CW beam with variable energy for producing light mesons in large quantities. PIP-II (at 920 MeV) or a possible new booster synchrotron would enable beams suitable for, respectively, a tagged-𝜂 and a tagged-𝜂' factory. Various possible options will be discussed during the presentation.

      Speaker: Mike Syphers (Northern Illinois University / Fermilab)
    • 17
      800 MeV Resonant Extraction from the Delivery Ring
      Speaker: John Johnstone (Fermilab)
    • 18
      The Physics of REDTOP

      The 𝜂 and 𝜂′ mesons are almost unique in the particle universe since they are Goldstone boson and the dynamics of their decay are strongly constrained. The integrated eta meson samples collected in earlier experiments have been about ~109 events, dominated by the WASA at Cosy experiment, limiting considerably the search for such rare decays. A new experiment, REDTOP, is being proposed, with the intent
      of collecting more than 1013 eta/year (1011 eta'/year) for studying of rare 𝜂 decays.
      Such statistics are sufficient for investigating several symmetry violations, and for searches of new particles beyond the Standard Model.
      With tagged-eta experiment the fully constrained kinematic of the process will allow for searches of light dark matter with a "Missing 4-momentum technique" which, at present, cannot be exploited by any other existing or proposed experiment.
      The physics program and the detector for REDTOP will be discussed during the presentation.

      Speaker: Anna Mazzacane (Fermilab)
    • 19
      The REDTOP Experiment
      Speaker: Corrado Gatto (INFN and Northern Illinois University)
    • 20
      Speaker: Sophie Middleton (Caltech)
    • 21
      Muχe: A Familon Search Experiment Using HPGe Detectors
      Speaker: David Koltick (Purdue University)
    • 9:30 AM
      Coffee Break
    • 22
      Planned Mu2e target test at AP0
      Speaker: Dave Pushka (Fermilab)
    • 23
      PIP-II upgrades
      Speaker: Eduard Pozdeyev
    • 24
      M^3 "Muon Missing Momentum
      Speaker: Yonatan Kahn (University of Illinois at Urbana-Champaign)
    • 25
      Muon Beam Experiments to Probe the Dark Sector

      A persistence of several anomalies in muon physics, such as the muon anomalous magnetic moment and the muonic hydrogen Lamb shift, hints at new light particles beyond the Standard Model. We address a subset of these models that have a new light scalar state with sizable couplings to muons and suppressed couplings to electrons. A novel way to search for such particles would be through muon beam-dump experiments by (1) missing momentum searches; (2) searches for decays with displaced vertices. The muon beams available at CERN and Fermilab present attractive opportunities for exploring the new scalar with a mass below the di-muon threshold, and potentially covering a range of relevant candidate models. For the models considered in this paper, both types of signals, muon missing momentum and anomalous energy deposition at a distance, can probe a substantial fraction of the unexplored parameter space of the new light scalar, including a region that can explain the muon anomalous magnetic moment discrepancy.

      Speaker: Yiming Zhong (Boston University)
    • Muon Campus Experiments: Open Discussion

      Session Chairs: David Tarazona (University of Liverpool) and Mary Convery (Fermilab)

      Conveners: David Tarazona (University of Liverpool), Mary Convery (Fermilab)
    • Potential Experiments: Introduction

      Session Chairs: Adam Schreckenberger (University of Illinois at Urbana-Champaign) and Alexey Petrov (Wayne State University)

      Conveners: Adam Schreckenberger (The Unversity of Texas at Austin), Alexey Petrov (Wayne State University)
    • 26
      Speaker: Riccardo Pilato
    • 27
      A New Charge Lepton Flavor Violation Program at Fermilab

      The search for charged lepton flavor violation (CLFV) has been underway since the discovery of the muon. PIP-II and the Booster Upgrade at Fermilab offer a chance to improve the limits by two orders-of-magnitude and study discoveries. We outline a program based on a new muon facility that can provide both a high-intensity nearly continuous stopped muon beam to study CLFV in muon decay, and a pulsed muon beam using a small muon storage ring to supply a muon-to-electron conversion experiment. The complex would begin using the beam from PIP-II but be designed to increase by a further order-of-magnitude sensitivity with the Booster Upgrade. The combination would provide the world's leading facility to explore the conservation of charged lepton family number.

      Speaker: Bertrand Echenard (Caltech)
    • 28
      Status & future Fermilab computing plans for intensity frontier experiments
      Speaker: Dr Adam Lyon (Fermilab)
    • 29
      Possibilities for target testing at AP0
      Speaker: Frederique Pellemoine (Fermilab -AD - TSD - TRD)
    • 9:35 AM
    • 30
      Decays and oscillations of muonium

      I will discuss muonium decays and muonium-antimuonium oscillations in the framework of effective field theory. I emphasize the complimentary role of muonium studies in searches for New Physics.

      Speaker: Alexey Petrov (Wayne State University)
    • 31
      DIMUS, possibility of such collider at NML
      Speaker: Vladimir Shiltsev (FNAL)
    • 32
      Physics opportunities at DIMUS
      Speaker: Patrick Fox (Fermilab)
    • 33
      DIMUS detector challenges and options
      Speaker: Sergo Jindariani (FNAL)
    • 34
      Snowmass process & white papers
      Speaker: Alexey Petrov (Wayne State University)
    • 35
      Closeout Comments
      Speaker: Jason Crnkovic (University of Mississippi)
    • Potential Experiments: Open Discussion time

      Session Chairs: Adam Schreckenberger (University of Illinois at Urbana-Champaign) and Alexey Petrov (Wayne State University)

      Conveners: Adam Schreckenberger (The Unversity of Texas at Austin), Alexey Petrov (Wayne State University)