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1. The PanEDM Neutron Electric Dipole Moment Experiment at the ILL

Author

Wurm, David, Beck, Douglas H., Chupp, Tim, Degenkolb, Skyler, Fierlinger, Katharina, Fierlinger, Peter, Filter, Hanno, Ivanov, Sergey, Klau, Christopher, Kreuz, Michael, Lelièvre-Berna, Eddy, Lins, Tobias, Meichelböck, Joachim, Neulinger, Thomas, Paddock, Robert, Röhrer, Florian, Rosner, Martin, Serebrov, Anatolii P., Singh, Jaideep Taggart, Stoepler, Rainer, Stuiber, Stefan, Sturm, Michael, Taubenheim, Bernd, Tonon, Xavier, Tucker, Mark, van der Grinten, Maurits, and Zimmer, Oliver

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The neutron's permanent electric dipole moment $d_n$ is constrained to below $3\times10^{-26} e~\text{cm}$ (90% C.L.) [ arXiv:hep-ex/0602020, arXiv:1509.04411 ], by experiments using ultracold neutrons (UCN). We plan to improve this limit by an order of magnitude or more with PanEDM, the first experiment exploiting the ILL's new UCN source SuperSUN. SuperSUN is expected to provide a high density of UCN with energies below 80 neV, implying extended statistical reach with respect to existing sources, for experiments that rely on long storage or spin-precession times. Systematic errors in PanEDM are strongly suppressed by passive magnetic shielding, with magnetic field and gradient drifts at the single fT level. A holding-field homogeneity on the order of $10^{-4}$ is achieved in low residual fields, via a high static damping factor and built-in coil system. No comagnetometer is needed for the first order-of-magnitude improvement in $d_n$, thanks to high magnetic stability and an assortment of sensors outside the UCN storage volumes. PanEDM will be commissioned and upgraded in parallel with SuperSUN, to take full advantage of the source's output in each phase. Commissioning is ongoing in 2019, and a new limit in the mid $10^{-27} e~\text{cm}$ range should be possible with two full reactor cycles of data in the commissioned apparatus., Comment: 8 pages, 4 figures; submitted to the Proceedings of the International Workshop on Particle Physics at Neutron Sources PPNS 2018, Grenoble, France, May 24-26, 2018

Published
2019
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2. Study of neutron beta decay with the Nab experiment.

Author

Baeßler, Stefan, Acharya, Himal, Alarcon, Ricardo, Broussard, Leah J., Bowler, Michael, Bowman, David, Choi, Jin Ha, Christie, Love, Chupp, Tim, Clymer, Skylar, Crawford, Christopher, Dodson, George, Fomin, Nadia, Fry, Jason, Gericke, Michael, Godri, Rebecca, Gonzalez, Francisco M., Greene, Geoff, Hagemeier, Andrew, and Hamblen, Josh

Subjects
NEUTRONS, BETA decay, PHYSICS experiments, STANDARD model (Nuclear physics), ELECTRON configuration
Abstract

The current three sigma tension in the unitarity test of the Cabbibo-Kobayashi-Maskawa (CKM) matrix is a notable problem with the Standard Model of elementary particle physics. A long-standing goal of the study of free neutron beta decay is to better determine the CKM element Vud through measurements of the neutron lifetime and a decay correlation parameter. The Nab collaboration intends to measure a, the neutrino-electron correlation, with accuracy sufficient for a competitive evaluation of Vud based on neutron decay data alone. This paper gives a status report and an outlook. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Project X: Physics Opportunities

Author

Kronfeld, Andreas S., Tschirhart, Robert S., Al-Binni, Usama, Altmannshofer, Wolfgang, Ankenbrandt, Charles, Babu, Kaladi, Banerjee, Sunanda, Bass, Matthew, Batell, Brian, Baxter, David V., Berezhiani, Zurab, Bergevin, Marc, Bernstein, Robert, Bhattacharya, Sudeb, Bishai, Mary, Blum, Thomas, Bogacz, S. Alex, Brice, Stephen J., Brod, Joachim, Bross, Alan, Buchoff, Michael, Burgess, Thomas W., Carena, Marcela, Castellanos, Luis A., Chattopadhyay, Subhasis, Chen, Mu-Chun, Cherdack, Daniel, Christ, Norman H., Chupp, Tim, Cirigliano, Vincenzo, Coloma, Pilar, Coppola, Christopher E., Cowsik, Ramanath, Crabtree, J. Allen, de Gouvêa, André, Delahaye, Jean-Pierre, Denisov, Dmitri, deNiverville, Patrick, Dharmapalan, Ranjan, Diefenthaler, Markus, Dolgov, Alexander, Dvali, Georgi, Eichten, Estia, Engelfried, Jürgen, Ferguson, Phillip D., Gabriel, Tony, Gal, Avraham, Gallmeier, Franz, Ganezer, Kenneth S., Gardner, Susan, Glenzinski, Douglas, Godfrey, Stephen, Golubeva, Elena S., Gori, Stefania, Graves, Van B., Greene, Geoffrey, Griffard, Cory L., Haisch, Ulrich, Handler, Thomas, Hartfiel, Brandon, Hatzikoutelis, Athanasios, Hawari, Ayman, Heilbronn, Lawrence, Hill, James E., Huber, Patrick, Jaffe, David E., Jiang, Xiaodong, Johnson, Christian, Kamyshkov, Yuri, Kaplan, Daniel M., Kerbikov, Boris, Kiburg, Brendan, Kirk, Harold G., Klein, Andreas, Knoepfel, Kyle, Kopeliovich, Boris, Kopeliovich, Vladimir, Kopp, Joachim, Korsch, Wolfgang, Kribs, Graham, Lipton, Ronald, Liu, Chen-Yu, Lorenzon, Wolfgang, Lu, Zheng-Tian, Makins, Naomi C. R., McKeen, David, Mills, Geoffrey, Mocko, Michael, Mohapatra, Rabindra, Mokhov, Nikolai V., Muhrer, Guenter, Mumm, Pieter, Neuffer, David, Okun, Lev, Palmer, Mark A., Palmer, Robert, Pattie Jr., Robert W., Phillips II, David G., Pitts, Kevin, Pospelov, Maxim, Pronskikh, Vitaly S., Quigg, Chris, Ramberg, Erik, Ray, Amlan, Reimer, Paul E., Richards, David G., Ritz, Adam, Roy, Amit, Ruggles, Arthur, Ryne, Robert, Sarkar, Utpal, Saunders, Andy, Semertzidis, Yannis K., Serebrov, Anatoly, Shimizu, Hirohiko, Shrock, Robert, Sikdar, Arindam K., Snopok, Pavel V., Snow, William M., Soha, Aria, Spanier, Stefan, Striganov, Sergei, Tang, Zhaowen, Townsend, Lawrence, Urheim, Jon, Vainshtein, Arkady, Van de Water, Richard, Van de Water, Ruth S., Van Kooten, Richard J., Wehring, Bernard, Wester III, William C., Whitehead, Lisa, Wilson, Robert J., Worcester, Elizabeth, Young, Albert R., and Zeller, Geralyn

Subjects
High Energy Physics - Experiment, High Energy Physics - Lattice, High Energy Physics - Phenomenology, Nuclear Experiment, Nuclear Theory, Physics - Accelerator Physics
Abstract

Part 2 of "Project X: Accelerator Reference Design, Physics Opportunities, Broader Impacts". In this Part, we outline the particle-physics program that can be achieved with Project X, a staged superconducting linac for intensity-frontier particle physics. Topics include neutrino physics, kaon physics, muon physics, electric dipole moments, neutron-antineutron oscillations, new light particles, hadron structure, hadron spectroscopy, and lattice-QCD calculations. Part 1 is available as arXiv:1306.5022 [physics.acc-ph] and Part 3 is available as arXiv:1306.5024 [physics.acc-ph]., Comment: 209 pp. with many figures; prepared in part for the DPF Community Summer Study; v2 corrects typos (including one author surname), adds an author, and conforms with the version being printed; v3 includes two more chapter authors in full list at the top

Published
2013

4. The PanEDM neutron electric dipole moment experiment at the ILL

Author

Wurm, David, primary, Beck, Douglas H., additional, Chupp, Tim, additional, Degenkolb, Skyler, additional, Fierlinger, Katharina, additional, Fierlinger, Peter, additional, Filter, Hanno, additional, Ivanov, Sergey, additional, Klau, Christopher, additional, Kreuz, Michael, additional, Lelièvre-Berna, Eddy, additional, Lins, Tobias, additional, Meichelböck, Joachim, additional, Neulinger, Thomas, additional, Paddock, Robert, additional, Röhrer, Florian, additional, Rosner, Martin, additional, Serebrov, Anatolii P., additional, Singh, Jaideep Taggart, additional, Stoepler, Rainer, additional, Stuiber, Stefan, additional, Sturm, Michael, additional, Taubenheim, Bernd, additional, Tonon, Xavier, additional, Tucker, Mark, additional, Grinten, Maurits van der, additional, and Zimmer, Oliver, additional

Published
2019
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5. The PanEDM neutron electric dipole moment experiment at the ILL.

Author

Jenke, T., Degenkolb, S., Jentschel, M., Nesvizhevsky, V.V., Rebreyend, D., Roccia, S., Soldner, T., Stutz, A., Zimmer, O., Wurm, David, Beck, Douglas H., Chupp, Tim, Degenkolb, Skyler, Fierlinger, Katharina, Fierlinger, Peter, Filter, Hanno, Ivanov, Sergey, Klau, Christopher, Kreuz, Michael, and Lelièvre-Berna, Eddy

Subjects
ELECTRIC dipole moments, NEUTRONS, MAGNETIC fields, DAMPING (Mechanics), DETECTORS
Abstract

The neutron's permanent electric dipole moment dn is constrained to below 3 × 10−26e cm (90% C.L.) [1, 2], by experiments using ultracold neutrons (UCN). We plan to improve this limit by an order of magnitude or more with PanEDM, the first experiment exploiting the ILL's new UCN source SuperSUN. SuperSUN is expected to provide a high density of UCN with energies below 80 neV, implying extended statistical reach with respect to existing sources, for experiments that rely on long storage or spin-precession times. Systematic errors in PanEDM are strongly suppressed by passive magnetic shielding, with magnetic field and gradient drifts at the single fT level. A holding-field homogeneity on the order of 10−4 is achieved in low residual fields, via a high static damping factor and built-in coil system. No comagnetometer is needed for the first order-of-magnitude improvement in dn, thanks to high magnetic stability and an assortment of sensors outside the UCN storage volumes. PanEDM will be commissioned and upgraded in parallel with SuperSUN, to take full advantage of the source's output in each phase. Commissioning is ongoing in 2019, and a new limit in the mid 10−27e cm range should be possible with two full reactor cycles of data in the commissioned apparatus. [ABSTRACT FROM AUTHOR]

Published
2019
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