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1. Detailed Report on the Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm

Author: Aguillard, D. P., Albahri, T., Allspach, D., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Bailey, L., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Barzi, E., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Braun, S., Bressler, M., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chapelain, A., Chappa, S., Charity, S., Chen, C., Cheng, M., Chislett, R., Chu, Z., Chupp, T. E., Claessens, C., Convery, M. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Sciascio, G., Donati, S., Drendel, B., Driutti, A., Duginov, V. N., Eads, M., Edmonds, A., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Foster, S. B., Friedsam, H., Froemming, N. S., Gabbanini, C., Gaines, I., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Goodenough, L., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Hertzog, D. W., Hesketh, G., Hess, E., Hibbert, A., Hodge, Z., Hong, K. W., Hong, R., Hu, T., Hu, Y., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D. S., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kinnaird, N., Kraegeloh, E., Krylov, V. A., Kuchinskiy, N. A., Labe, K. R., LaBounty, J., Lancaster, M., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Campos, A. Lorente, Lu, Z., Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., MacCoy, B., Madrak, R., Makino, K., Mastroianni, S., Miller, J. P., Miozzi, S., Mitra, B., Morgan, J. P., Morse, W. M., Mott, J., Nath, A., Ng, J. K., Nguyen, H., Oksuzian, Y., Omarov, Z., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Qureshi, M. U. H., Ramachandran, S., Ramberg, E., Reimann, R., Roberts, B. L., Rubin, D. L., Sakurai, M., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Sorbara, M., Stapleton, J., Still, D., Stöckinger, D., Stoughton, C., Stratakis, D., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Volnykh, V. P., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wu, Y., Yu, B., Yucel, M., Zeng, Y., and Zhang, C.
Subjects: High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Experiment
Abstract: We present details on a new measurement of the muon magnetic anomaly, $a_\mu = (g_\mu -2)/2$. The result is based on positive muon data taken at Fermilab's Muon Campus during the 2019 and 2020 accelerator runs. The measurement uses $3.1$ GeV$/c$ polarized muons stored in a $7.1$-m-radius storage ring with a $1.45$ T uniform magnetic field. The value of $ a_{\mu}$ is determined from the measured difference between the muon spin precession frequency and its cyclotron frequency. This difference is normalized to the strength of the magnetic field, measured using Nuclear Magnetic Resonance (NMR). The ratio is then corrected for small contributions from beam motion, beam dispersion, and transient magnetic fields. We measure $a_\mu = 116 592 057 (25) \times 10^{-11}$ (0.21 ppm). This is the world's most precise measurement of this quantity and represents a factor of $2.2$ improvement over our previous result based on the 2018 dataset. In combination, the two datasets yield $a_\mu(\text{FNAL}) = 116 592 055 (24) \times 10^{-11}$ (0.20 ppm). Combining this with the measurements from Brookhaven National Laboratory for both positive and negative muons, the new world average is $a_\mu$(exp) $ = 116 592 059 (22) \times 10^{-11}$ (0.19 ppm)., Comment: 48 pages, 29 figures; 4 pages of Supplement Material; version accepted for publication in Physical Review D
Published: 2024

2. Workshop on a future muon program at FNAL

Author: Corrodi, S., Oksuzian, Y., Edmonds, A., Miller, J., Tran, H. N., Bonventre, R., Brown, D. N., Meot, F., Singh, V., Kolomensky, Y., Tripathy, S., Borrel, L., Bub, M., Echenard, B., Hitlin, D. G., Jafree, H., Middleton, S., Plestid, R., Porter, F. C., Zhu, R. Y., Bottura, L., Pinsard, E., Teixeira, A. M., Carelli, C., Ambrose, D., Badgley, K., Bautista, G. D., Bernstein, R. H., Boi, S., Crnkovic, J., Eldred, J., Gaponenko, A., Johnstone, C., Kiburg, B., Kutschke, R., Lynch, K., Mukherjee, A., Neuffer, D., Pellemoine, F., Pronskikh, V., Rakness, G., Tang, J., Tschirhart, R., Yucel, M., Zettlemoyer, J., Simons, B., Redigolo, D., Diociaiuti, E., Giovannella, S., Miscetti, S., Sarra, I., Muller, S. E., Ootani, W., Yucel, E. B., Kaplan, D. M., Phillips, T. J., Pasternak, J., Palo, D., Davydov, Y., Brown, D., Banerjee, S., Kawall, D., Hartwig, Z., Davidson, S., Abrams, R., Kampa, C., Mackenzie, M., Schmitt, M., Piot, P., Lee, Y. J., Morozov, V., Sato, A., Di Falco, S., Gioiosa, A., Morescalchi, L., Papa, A., Hedges, M. T., Renga, F., Lagrange, J. -B., Rogers, C., Wilcox, D., Petrov, A., Zhao, S., Dukes, E. C., Erlich, R., Group, C., Heeck, J., Pezzullo, G., Nguyen, T., and Popp, J. L.
Subjects: High Energy Physics - Experiment, Physics - Accelerator Physics
Abstract: The Snowmass report on rare processes and precision measurements recommended Mu2e-II and a next generation muon facility at Fermilab (Advanced Muon Facility) as priorities for the frontier. The Workshop on a future muon program at FNAL was held in March 2023 to discuss design studies for Mu2e-II, organizing efforts for the next generation muon facility, and identify synergies with other efforts (e.g., muon collider). Topics included high-power targetry, status of R&D for Mu2e-II, development of compressor rings, FFA and concepts for muon experiments (conversion, decays, muonium and other opportunities) at AMF. This document summarizes the workshop discussions with a focus on future R&D tasks needed to realize these concepts., Comment: 68 pages, 36 figures
Published: 2023

3. Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm

Author: Aguillard, D. P., Albahri, T., Allspach, D., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Bailey, L., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Barzi, E., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Braun, S., Bressler, M., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chapelain, A., Chappa, S., Charity, S., Chen, C., Cheng, M., Chislett, R., Chu, Z., Chupp, T. E., Claessens, C., Convery, M. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Sciascio, G., Drendel, B., Driutti, A., Duginov, V. N., Eads, M., Edmonds, A., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Foster, S. B., Friedsam, H., Froemming, N. S., Gabbanini, C., Gaines, I., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Goodenough, L., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Hertzog, D. W., Hesketh, G., Hess, E., Hibbert, A., Hodge, Z., Hong, K. W., Hong, R., Hu, T., Hu, Y., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D. S., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kinnaird, N., Kraegeloh, E., Krylov, V. A., Kuchinskiy, N. A., Labe, K. R., LaBounty, J., Lancaster, M., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Campos, A. Lorente, Lu, Z., Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., MacCoy, B., Madrak, R., Makino, K., Mastroianni, S., Miller, J. P., Miozzi, S., Mitra, B., Morgan, J. P., Morse, W. M., Mott, J., Nath, A., Ng, J. K., Nguyen, H., Oksuzian, Y., Omarov, Z., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Qureshi, M. U. H., Ramachandran, S., Ramberg, E., Reimann, R., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Sorbara, M., Stapleton, J., Still, D., Stöckinger, D., Stoughton, C., Stratakis, D., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Volnykh, V. P., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wu, Y., Yu, B., Yucel, M., Zeng, Y., and Zhang, C.
Subjects: High Energy Physics - Experiment
Abstract: We present a new measurement of the positive muon magnetic anomaly, $a_\mu \equiv (g_\mu - 2)/2$, from the Fermilab Muon $g\!-\!2$ Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our previous result from 2018 data. The systematic error is reduced by more than a factor of 2 due to better running conditions, a more stable beam, and improved knowledge of the magnetic field weighted by the muon distribution, $\tilde{\omega}'^{}_p$, and of the anomalous precession frequency corrected for beam dynamics effects, $\omega_a$. From the ratio $\omega_a / \tilde{\omega}'^{}_p$, together with precisely determined external parameters, we determine $a_\mu = 116\,592\,057(25) \times 10^{-11}$ (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain $a_\mu\text{(FNAL)} = 116\,592\,055(24) \times 10^{-11}$ (0.20 ppm). The new experimental world average is $a_\mu (\text{Exp}) = 116\,592\,059(22)\times 10^{-11}$ (0.19 ppm), which represents a factor of 2 improvement in precision., Comment: 8 pages, 3 figures
Published: 2023
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4. Development of the Scintillating Fiber Timing Detector for the Mu3e Experiment

Author: Bravar, A., Buonaura, A., Corrodi, S., Damyanova, A., Demets, Y., Gerritzen, L., Grab, Ch., Perez, C. Martin, and Papa, A.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: We present and discuss the development and performance of a compact scintillating fiber (SciFi) detector for timing to be used in the Mu3e experiment at very high particle rates. The SciFi detector is read out with multichannel silicon photomuiltipliers (SiPM) arrays at both ends to achieve the best timing performance. Mu3e is a new experiment under preparation at the Paul Scherrer Institute to search for charged Lepton Flavor Violation in the rare neutrinoless muon decay mu->eee using the most intense continuous surface muon beam in the world. The Mu3e detector is based on thin high-voltage monolithic active silicon pixel sensors (HV-MAPS) for very precise tracking in conjunction with scintillating fibers and scintillating tiles coupled to SiPMs for accurate timing measurements and it is designed to operate at very high intensities. In order to reach a single event sensitivity of 10^-16 for this rare mu->eee muon decay, all backgrounds must be rejected well below this level. To suppress all forms of accidental background, a very thin SciFi detector (thickness < 0.2% of a radiation length X_0) with a time resolution of 250 ps, efficiency in excess of 96%, and spatial resolution of 100 micron has been developed. In this paper we report on the development, construction, and performance of this SciFi detector. Different scintillating fiber types have been evaluated and various assembly procedures have been tested to achieve the best performance. The compact size, fast response, good timing, high spatial resolution, insensitivity to magnetic fields, and adaptable geometry make SciFi detectors suitable for a variety of applications., Comment: To be submitted to Jurnal of Instrumentation
Published: 2022

5. Mu2e-II: Muon to electron conversion with PIP-II

Author: Byrum, K., Corrodi, S., Oksuzian, Y., Winter, P., Xia, L., Edmonds, A. W. J., Miller, J. P., Mott, J., Marciano, W. J., Szafron, R., Bonventre, R., Brown, D. N., Kolomensky, Yu. G., Ning, O., Singh, V., Prebys, E., Borrel, L., Echenard, B., Hitlin, D. G., Hu, C., Lin, D. X., Middleton, S., Porter, F. C., Zhang, L., Zhu, R. -Y., Ambrose, D., Badgley, K., Bernstein, R. H., Boi, S., Casey, B. C. K., Culbertson, R., Gaponenko, A., Glass, H. D., Glenzinski, D., Goodenough, L., Hocker, A., Kargiantoulakis, M., Kashikhin, V., Kiburg, B., Kutschke, R. K., Murat, P. A., Neuffer, D., Pronskikh, V. S., Pushka, D., Rakness, G., Strauss, T., Yucel, M., Bloise, C., Diociaiuti, E., Giovannella, S., Happacher, F., Miscetti, S., Sarra, I., Martini, M., Ferrari, A., Müller, S. E., Rachamin, R., Barlas-Yucel, E., Artikov, A., Atanov, N., Davydov, Yu. I., Glagolev, V., Vasilyev, I. I., Uesaka, Y., Denisov, S. P., Evdokimov, V., Kozelov, A. V., Popov, A. V., Vasilyev, I. A., Tassielli, G., Teubner, T., Chislett, R. T., Hesketh, G. G., Lancaster, M., Campbell, M., Ciampa, K., Heller, K., Messerly, B., Cummings, M. A. C., Calibbi, L., Blazey, G. C., Syphers, M. J., Zutshi, V., Kampa, C., MacKenzie, M., Di Falco, S., Donati, S., Gioiosa, A., Giusti, V., Morescalchi, L., Pasciuto, D., Pedreschi, E., Spinella, F., Hedges, M. T., Jones, M., You, Z. Y., Zanetti, A. M., Valetov, E. V., Dukes, E. C., Ehrlich, R., Group, R. C., Heeck, J., Hung, P. Q., Demers, S. M., Pezzullo, G., Lynch, K. R., and Popp, J. L.
Subjects: High Energy Physics - Experiment
Abstract: An observation of Charged Lepton Flavor Violation (CLFV) would be unambiguous evidence for physics beyond the Standard Model. The Mu2e and COMET experiments, under construction, are designed to push the sensitivity to CLFV in the mu to e conversion process to unprecedented levels. Whether conversion is observed or not, there is a strong case to be made for further improving sensitivity, or for examining the process on additional target materials. Mu2e-II is a proposed upgrade to Mu2e, with at least an additional order of magnitude in sensitivity to the conversion rate over Mu2e. The approach and challenges for this proposal are summarized. Mu2e-II may be regarded as the next logical step in a continued high-intensity muon program at FNAL., Comment: Contribution to Snowmass 2021 46 pages 43 figures 7 tables
Published: 2022

6. Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment

Author: PIONEER Collaboration, Altmannshofer, W., Binney, H., Blucher, E., Bryman, D., Caminada, L., Chen, S., Cirigliano, V., Corrodi, S., Crivellin, A., Cuen-Rochin, S., Di Canto, A., Doria, L., Gaponenko, A., Garcia, A., Gibbons, L., Glaser, C., Godoy, M. Escobar, Göldi, D., Gori, S., Gorringe, T., Hertzog, D., Hodge, Z., Hoferichter, M., Ito, S., Iwamoto, T., Kammel, P., Kiburg, B., Labe, K., LaBounty, J., Langenegger, U., Malbrunot, C., Mazza, S. M., Mihara, S., Mischke, R., Mori, T., Mott, J., Numao, T., Ootani, W., Ott, J., Pachal, K., Polly, C., Počanić, D., Qian, X., Ries, D., Roehnelt, R., Schumm, B., Schwendimann, P., Seiden, A., Sher, A., Shrock, R., Soter, A., Sullivan, T., Tarka, M., Tischenko, V., Tricoli, A., Velghe, B., Wong, V., Worcester, E., Worcester, M., and Zhang, C.
Subjects: High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract: The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and approved at Paul Scherrer Institut, aims at measuring the charged-pion branching ratio to electrons vs.\ muons, $R_{e/\mu}$, 15 times more precisely than the current experimental result, reaching the precision of the Standard Model (SM) prediction at 1 part in $10^4$. Considering several inconsistencies between the SM predictions and data pointing towards the potential violation of lepton flavor universality, the PIONEER experiment will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles up to the PeV mass scale. The later phases of the PIONEER experiment aim at improving the experimental precision of the branching ratio of pion beta decay (BRPB), $\pi^+\to \pi^0 e^+ \nu (\gamma)$, currently at $1.036(6)\times10^{-8}$, by a factor of three (Phase II) and an order of magnitude (Phase III). Such precise measurements of BRPB will allow for tests of CKM unitarity in light of the Cabibbo Angle Anomaly and the theoretically cleanest extraction of $|V_{ud}|$ at the 0.02\% level, comparable to the deduction from superallowed beta decays., Comment: contribution to Snowmass 2021 based on the PIONEER proposal (arXiv:2203.01981)
Published: 2022

7. PIONEER: Studies of Rare Pion Decays

Author: PIONEER Collaboration, Altmannshofer, W., Binney, H., Blucher, E., Bryman, D., Caminada, L., Chen, S., Cirigliano, V., Corrodi, S., Crivellin, A., Cuen-Rochin, S., DiCanto, A., Doria, L., Gaponenko, A., Garcia, A., Gibbons, L., Glaser, C., Godoy, M. Escobar, Göldi, D., Gori, S., Gorringe, T., Hertzog, D., Hodge, Z., Hoferichter, M., Ito, S., Iwamoto, T., Kammel, P., Kiburg, B., Labe, K., LaBounty, J., Langenegger, U., Malbrunot, C., Mazza, S. M., Mihara, S., Mischke, R., Mori, T., Mott, J., Numao, T., Ootani, W., Ott, J., Pachal, K., Polly, C., Počanić, D., Qian, X., Ries, D., Roehnelt, R., Schumm, B., Schwendimann, P., Seiden, A., Sher, A., Shrock, R., Soter, A., Sullivan, T., Tarka, M., Tischenko, V., Tricoli, A., Velghe, B., Wong, V., Worcester, E., Worcester, M., and Zhang, C.
Subjects: High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract: A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/\mu}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\mu}$ is known to 1 part in $10^4$, which is 15 times more precise than the current experimental result. An experiment reaching the theoretical accuracy will test lepton flavor universality at an unprecedented level, probing mass scales up to the PeV range. Measurement of pion beta decay, $\pi^+\to \pi^0 e^+ \nu (\gamma)$, with 3 to 10-fold improvement in sensitivity, will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity, which is very important in light of the recently emerged tensions. In addition, various exotic rare decays involving sterile neutrinos and axions will be searched for with unprecedented sensitivity. The experiment design benefits from experience with the recent PIENU and PEN experiments at TRIUMF and the Paul Scherrer Institut (PSI). Excellent energy and time resolutions, greatly increased calorimeter depth, high-speed detector and electronics response, large solid angle coverage, and complete event reconstruction are all critical aspects of the approach. The PIONEER experiment design includes a 3$\pi$ sr 25 radiation length calorimeter, a segmented low gain avalanche detector stopping target, a positron tracker, and other detectors. Using intense pion beams, and state-of-the-art instrumentation and computational resources, the experiments can be performed at the PSI ring cyclotron.
Published: 2022

8. High-Accuracy Absolute Magnetometry with Application to the Fermilab Muon $g-2$ Experiment

Author: Flay, D., Kawall, D., Chupp, T., Corrodi, S., Farooq, M., Fertl, M., George, J., Grange, J., Hong, R., Osofsky, R., Ramachandran, S., Swanson, E., and Winter, P.
Subjects: Physics - Instrumentation and Detectors
Abstract: We present details of a high-accuracy absolute scalar magnetometer based on pulsed proton NMR. The $B$-field magnitude is determined from the precession frequency of proton spins in a cylindrical sample of water after accounting for field perturbations from probe materials, sample shape, and other corrections. Features of the design, testing procedures, and corrections necessary for qualification as an absolute scalar magnetometer are described. The device was tested at $B = 1.45$\,T but can be modified for a range exceeding 1--3\,T. The magnetometer was used to calibrate other NMR magnetometers and measure absolute magnetic field magnitudes to an accuracy of 19 parts per billion as part of a measurement of the muon magnetic moment anomaly at Fermilab.
Published: 2021
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9. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g-2 experiment

Author: Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Frlež, E., Froemming, N. S., Fry, J., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Kraegeloh, E., Kuchibhotla, A., Kuchinskiy, N. A., Labe, K. R., LaBounty, J., Lancaster, M., Lee, M. J., Lee, S., Leo, S., Li, B., Li, D., Li, L., Logashenko, I., Campos, A. Lorente, Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., MacCoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Smith, M. W., Sorbara, M., Stöckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.
Subjects: High Energy Physics - Experiment, Nuclear Experiment
Abstract: The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $\omega_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment's muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of $a_{\mu}({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis and fitting of the data to measure the precession frequency. It also presents the averaging of the results from the eleven separate determinations of \omega_a, and the systematic uncertainties on the result., Comment: 29 pages, 19 figures. Published in Physical Review D
Published: 2021
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10. Magnetic Field Measurement and Analysis for the Muon g-2 Experiment at Fermilab

Author: Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Froemming, N. S., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Kraegeloh, E., Kuchinskiy, N. A., Labe, K. R., LaBounty, J., Lancaster, M., Lee, M. J., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Campos, A. Lorente, Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., MacCoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Smith, M. W., Sorbara, M., Stöckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.
Subjects: High Energy Physics - Experiment, Nuclear Experiment
Abstract: The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of the muon to a combined precision of 0.46 parts per million with data collected during its first physics run in 2018. This paper documents the measurement of the magnetic field in the muon storage ring. The magnetic field is monitored by nuclear magnetic resonance systems and calibrated in terms of the equivalent proton spin precession frequency in a spherical water sample at 34.7$^\circ$C. The measured field is weighted by the muon distribution resulting in $\tilde{\omega}'^{}_p$, the denominator in the ratio $\omega^{}_a$/$\tilde{\omega}'^{}_p$ that together with known fundamental constants yields $a^{}_\mu$. The reported uncertainty on $\tilde{\omega}'^{}_p$ for the Run-1 data set is 114 ppb consisting of uncertainty contributions from frequency extraction, calibration, mapping, tracking, and averaging of 56 ppb, and contributions from fast transient fields of 99 ppb., Comment: Added one citation and corrected missing normalization in Eqs (35) and (36)
Published: 2021
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11. Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm

Author: Abi, B., Albahri, T., Al-Kilani, S., Allspach, D., Alonzi, L. P., Anastasi, A., Anisenkov, A., Azfar, F., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Barzi, E., Basti, A., Bedeschi, F., Behnke, A., Berz, M., Bhattacharya, M., Binney, H. P., Bjorkquist, R., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Boyden, D., Cantatore, G., Carey, R. M., Carroll, J., Casey, B. C. K., Cauz, D., Ceravolo, S., Chakraborty, R., Chang, S. P., Chapelain, A., Chappa, S., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Convery, M. E., Conway, A., Corradi, G., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., De Lurgio, P. M., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Drendel, B., Driutti, A., Duginov, V. N., Eads, M., Eggert, N., Epps, A., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fiedler, A., Fienberg, A. T., Fioretti, A., Flay, D., Foster, S. B., Friedsam, H., Frlež, E., Froemming, N. S., Fry, J., Fu, C., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., Gastler, D. E., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Hahn, D., Halewood-Leagas, T., Hampai, D., Han, F., Hazen, E., Hempstead, J., Henry, S., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Johnstone, C., Johnstone, J. A., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, S. C., Kim, Y. I., King, B., Kinnaird, N., Korostelev, M., Kourbanis, I., Kraegeloh, E., Krylov, V. A., Kuchibhotla, A., Kuchinskiy, N. A., Labe, K. R., LaBounty, J., Lancaster, M., Lee, M. J., Lee, S., Leo, S., Li, B., Li, D., Li, L., Logashenko, I., Campos, A. Lorente, Lucà, A., Lukicov, G., Luo, G., Lusiani, A., Lyon, A. L., MacCoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Maxfield, S., McEvoy, M., Merritt, W., Mikhailichenko, A. A., Miller, J. P., Miozzi, S., Morgan, J. P., Morse, W. M., Mott, J., Motuk, E., Nath, A., Newton, D., Nguyen, H., Oberling, M., Osofsky, R., Ostiguy, J. -F., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Popovic, M., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Rider, N. T., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Sathyan, D., Schellman, H., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shatunov, Y. M., Shemyakin, D., Shenk, M., Sim, D., Smith, M. W., Smith, A., Soha, A. K., Sorbara, M., Stöckinger, D., Stapleton, J., Still, D., Stoughton, C., Stratakis, D., Strohman, C., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Volnykh, V. P., Walton, T., Warren, M., Weisskopf, A., Welty-Rieger, L., Whitley, M., Winter, P., Wolski, A., Wormald, M., Wu, W., and Yoshikawa, C.
Subjects: High Energy Physics - Experiment, Nuclear Experiment
Abstract: We present the first results of the Fermilab Muon g-2 Experiment for the positive muon magnetic anomaly $a_\mu \equiv (g_\mu-2)/2$. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency $\omega_a$ between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ${\tilde{\omega}'^{}_p}$ in a spherical water sample at 34.7$^{\circ}$C. The ratio $\omega_a / {\tilde{\omega}'^{}_p}$, together with known fundamental constants, determines $a_\mu({\rm FNAL}) = 116\,592\,040(54)\times 10^{-11}$ (0.46\,ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both $\mu^+$ and $\mu^-$, the new experimental average of $a_\mu({\rm Exp}) = 116\,592\,061(41)\times 10^{-11}$ (0.35\,ppm) increases the tension between experiment and theory to 4.2 standard deviations, Comment: 10 pages; 4 figures
Published: 2021
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12. Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab

Author: Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fiedler, A., Fienberg, A. T., Fioretti, A., Flay, D., Frlež, E., Froemming, N. S., Fry, J., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Korostelev, M., Kraegeloh, E., Kuchinskiy, N. A., Labe, K. R., LaBounty, J., Lancaster, M., Lee, M. J., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Campos, A. Lorente, Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., MacCoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Newton, D., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Sathyan, D., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Smith, M. W., Sorbara, M., Stöckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.
Subjects: Physics - Accelerator Physics, High Energy Physics - Experiment
Abstract: This paper presents the beam dynamics systematic corrections and their uncertainties for the Run-1 data set of the Fermilab Muon g-2 Experiment. Two corrections to the measured muon precession frequency $\omega_a^m$ are associated with well-known effects owing to the use of electrostatic quadrupole (ESQ) vertical focusing in the storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through the radial electric field components created by the ESQ system. The correction depends on the stored momentum distribution and the tunes of the ring, which has relatively weak vertical focusing. Vertical betatron motions imply that the muons do not orbit the ring in a plane exactly orthogonal to the vertical magnetic field direction. A correction is necessary to account for an average pitch angle associated with their trajectories. A third small correction is necessary because muons that escape the ring during the storage time are slightly biased in initial spin phase compared to the parent distribution. Finally, because two high-voltage resistors in the ESQ network had longer than designed RC time constants, the vertical and horizontal centroids and envelopes of the stored muon beam drifted slightly, but coherently, during each storage ring fill. This led to the discovery of an important phase-acceptance relationship that requires a correction. The sum of the corrections to $\omega_a^m$ is 0.50 $\pm$ 0.09 ppm; the uncertainty is small compared to the 0.43 ppm statistical precision of $\omega_a^m$., Comment: 35 pages, 29 figures. Accepted by Phys. Rev. Accel. Beams
Published: 2021
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13. Development of the scintillating fiber timing detector for the Mu3e experiment

Author: Bravar, A., Buonaura, A., Corrodi, S., Damyanova, A., Demets, Y., Gerritzen, L., Grab, C., Perez, C. Martin, and Papa, A.
Published: 2024
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14. Technical design of the phase I Mu3e experiment

Author: Arndt, K., Augustin, H., Baesso, P., Berger, N., Berg, F., Betancourt, C., Bortoletto, D., Bravar, A., Briggl, K., Bruch, D. vom, Buonaura, A., Cadoux, F., Barajas, C. Chavez, Chen, H., Clark, K., Cooke, P., Corrodi, S., Damyanova, A., Demets, Y., Dittmeier, S., Eckert, P., Ehrler, F., Fahrni, D., Gagneur, S., Gerritzen, L., Goldstein, J., Gottschalk, D., Grab, C., Gredig, R., Groves, A., Hammerich, J., Hartenstein, U., Hartmann, U., Hayward, H., Herkert, A., Hesketh, G., Hetzel, S., Hildebrandt, M., Hodge, Z., Hofer, A., Huang, Q. H., Hughes, S., Huth, L., Immig, D. M., Jones, T., Jones, M., Kästli, H. -C., Köppel, M., Kettle, P. -R., Kiehn, M., Kilani, S., Klingenmeyer, H., Knecht, A., Knight, A., Kotlinski, B., Kozlinskiy, A., Leys, R., Lockwood, G., Loreti, A., La Marra, D., Müller, M., Meier, B., Aeschbacher, F. Meier, Meneses, A., Metodiev, K., Mtchedlishvili, A., Muley, S., Munwes, Y., Noehte, L. O. S., Owen, P., Papa, A., Paraskevas, I., Períc, I., Perrevoort, A. -K., Plackett, R., Pohl, M., Ritt, S., Robmann, P., Rompotis, N., Rudzki, T., Rutar, G., Schöning, A., Schimassek, R., Schultz-Coulon, H. -C., Serra, N., Shen, W., Shipsey, I., Shrestha, S., Steinkamp, O., Stoykov, A., Straumann, U., Streuli, S., Stumpf, K., Tata, N., Velthuis, J., Vigani, L., Vilella-Figueras, E., Vossebeld, J., Wallny, R., Wasili, A., Wauters, F., Weber, A., Wiedner, D., Windelband, B., and Zhong, T.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: The Mu3e experiment aims to find or exclude the lepton flavour violating decay $\mu \rightarrow eee$ at branching fractions above $10^{-16}$. A first phase of the experiment using an existing beamline at the Paul Scherrer Institute (PSI) is designed to reach a single event sensitivity of $2\cdot 10^{-15}$. We present an overview of all aspects of the technical design and expected performance of the phase~I Mu3e detector. The high rate of up to $10^{8}$ muon decays per second and the low momenta of the decay electrons and positrons pose a unique set of challenges, which we tackle using an ultra thin tracking detector based on high-voltage monolithic active pixel sensors combined with scintillating fibres and tiles for precise timing measurements., Comment: 117 pages. Minor corrections to the author list. Replaced with published version. Editor: Frank Meier Aeschbacher
Published: 2020
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15. Design and performance of an in-vacuum, magnetic field mapping system for the Muon g-2 experiment

Author: Corrodi, S., De Lurgio, P., Flay, D., Grange, J., Hong, R., Kawall, D., Oberling, M., Ramachandran, S., and Winter, P.
Subjects: Physics - Instrumentation and Detectors
Abstract: The E989 Muon $g-2$ experiment at Fermilab aims to measure the anomalous magnetic moment, $a^{}_\mu$, of the muon with a precision of 140 parts-per-billion. This requires a precise measurement of both the anomalous spin precession frequency, $\omega^{}_a$, and the average magnetic field in terms of the shielded proton Larmor frequency, $\omega'^{}_p$. The measurement of $\omega'^{}_p$ with a total systematic uncertainty of 70 parts-per-billion involves a combination of various NMR probes. There are 378 probes in fixed locations constantly monitoring field drifts. A water-based probe provides the calibration. A crucial element for the multi-step measurement of $\omega'^{}_p$ is the regular mapping of the magnetic field over the muon storage region. The former E821 experiment at Brookhaven employed an in-vacuum field mapping system equipped with 17 NMR probes, which was developed by the University of Heidelberg. We have refurbished and upgraded this system with new probes and electronics. The upgrades include a new communication scheme incorporating time-division multiplexing to separate the important NMR reference clock from the data communication. The addition digitization of the NMR signals replaced the hardware-implemented zero-crossing counting of the E821 system. The digitized signals offer new capabilities in the NMR frequency analysis and its related systematic uncertainties. While the mechanical systems that move the field mapper around the ring have been mostly refurbished, the motion control system was completely replaced with a custom-built electronics centered around a commercial Galil motion controller. Both the field mapping NMR system and its motion control were successfully commissioned at Fermilab and have been in reliable operation during the first data taking periods. This article provides details of the upgrades of the field mapper and its performance.
Published: 2020
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16. The Mu3e scintillating fiber detector R&D

Author: Papa, A., Rutar, G., Barchetti, S., Bravar, S., Briggl, K., Buonaura, A., Corrodi, S., Damyanova, A., Demets, Y., Gerritzen, L., Grab, C., Hildebrandt, M., and Perez, C. Martin
Published: 2023
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17. Technical design of the phase I Mu3e experiment

Author: Arndt, K., Augustin, H., Baesso, P., Berger, N., Berg, F., Betancourt, C., Bortoletto, D., Bravar, A., Briggl, K., vom Bruch, D., Buonaura, A., Cadoux, F., Chavez Barajas, C., Chen, H., Clark, K., Cooke, P., Corrodi, S., Damyanova, A., Demets, Y., Dittmeier, S., Eckert, P., Ehrler, F., Fahrni, D., Gagneur, S., Gerritzen, L., Goldstein, J., Gottschalk, D., Grab, C., Gredig, R., Groves, A., Hammerich, J., Hartenstein, U., Hartmann, U., Hayward, H., Herkert, A., Hesketh, G., Hetzel, S., Hildebrandt, M., Hodge, Z., Hofer, A., Huang, Q.H., Hughes, S., Huth, L., Immig, D.M., Jones, T., Jones, M., Kästli, H.-C., Köppel, M., Kettle, P.-R., Kiehn, M., Kilani, S., Klingenmeyer, H., Knecht, A., Knight, A., Kotlinski, B., Kozlinskiy, A., Leys, R., Lockwood, G., Loreti, A., La Marra, D., Müller, M., Meier, B., Meier Aeschbacher, F., Meneses, A., Metodiev, K., Mtchedlishvili, A., Muley, S., Munwes, Y., Noehte, L.O.S., Owen, P., Papa, A., Paraskevas, I., Perić, I., Perrevoort, A.-K., Plackett, R., Pohl, M., Ritt, S., Robmann, P., Rompotis, N., Rudzki, T., Rutar, G., Schöning, A., Schimassek, R., Schultz-Coulon, H.-C., Serra, N., Shen, W., Shipsey, I., Shrestha, S., Steinkamp, O., Stoykov, A., Straumann, U., Streuli, S., Stumpf, K., Tata, N., Velthuis, J., Vigani, L., Vilella-Figueras, E., Vossebeld, J., Wallny, R., Wasili, A., Wauters, F., Weber, A., Wiedner, D., Windelband, B., and Zhong, T.
Published: 2021
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18. The Mu3e scintillating fiber timing detector

Author: Bravar, A., Briggl, K., Corrodi, S., Damyanova, A., Gerritzen, L., Grab, C., Hildebrandt, M., Papa, A., and Rutar, G.
Published: 2020
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19. Development of the scintillating fiber timing detector for the Mu3e experiment

Author: Bravar, A., primary, Buonaura, A., additional, Corrodi, S., additional, Damyanova, A., additional, Demets, Y., additional, Gerritzen, L., additional, Grab, C., additional, Perez, C. Martin, additional, and Papa, A., additional
Published: 2023
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20. PIONEER: Studies of Rare Pion Decays

Author: Altmannshofer, W., Gori, S., Godoy, M., Grillo, A., Mazza, S., Ott, J., Schumm, B., Seiden, A., Tarka, M., Binney, H., Garcia, A., Hertzog, D., Hodge, Z., Kammel, P., LaBounty, J., Roehnelt, R., Blucher, E., Bryman, D., Chen, S., Cirigliano, V., Corrodi, S., Hernandez, C. Ortega, Cuen-Rochin, S., Czarnecki, A., DiCanto, A., Jaffe, D., Kettel, S., Tischenko, V., Tricoli, A., Worcester, E., Doria, L., Gorchtein, M., Ries, D., Gaponenko, A., Kiburg, B., Mott, J., Polly, C., Gibbons, L., Labe, K., Glaser, C., Počanić, D., Gorringe, T., Hoferichter, M., Ito, S., Mihara, S., Iwamoto, T., Mori, T., Ootani, W., Wataru, T., Langenegger, U., Schwendimann, P., Malbrunot, C., Mischke, R., Numao, T., Pachal, K., Sher, A., Velghe, B., Wong, V., Soter, A., Shrock, R., and Sullivan, T.
Subjects: Physics - Instrumentation and Detectors, hep-ex, FOS: Physical sciences, hep-ph, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Experiment, Detectors and Experimental Techniques, physics.ins-det, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract: A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/\mu}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\mu}$ is known to 1 part in $10^4$, which is 15 times more precise than the current experimental result. An experiment reaching the theoretical accuracy will test lepton flavor universality at an unprecedented level, probing mass scales up to the PeV range. Measurement of pion beta decay, $\pi^+\to \pi^0 e^+ \nu (\gamma)$, with 3 to 10-fold improvement in sensitivity, will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity, which is very important in light of the recently emerged tensions. In addition, various exotic rare decays involving sterile neutrinos and axions will be searched for with unprecedented sensitivity. The experiment design benefits from experience with the recent PIENU and PEN experiments at TRIUMF and the Paul Scherrer Institut (PSI). Excellent energy and time resolutions, greatly increased calorimeter depth, high-speed detector and electronics response, large solid angle coverage, and complete event reconstruction are all critical aspects of the approach. The PIONEER experiment design includes a 3$\pi$ sr 25 radiation length calorimeter, a segmented low gain avalanche detector stopping target, a positron tracker, and other detectors. Using intense pion beams, and state-of-the-art instrumentation and computational resources, the experiments can be performed at the PSI ring cyclotron.
Published: 2022

21. High-accuracy absolute magnetometry with application to the Fermilab Muon g-2 experiment

Author: Flay, D., primary, Kawall, D., additional, Chupp, T., additional, Corrodi, S., additional, Farooq, M., additional, Fertl, M., additional, George, J., additional, Grange, J., additional, Hong, R., additional, Osofsky, R., additional, Ramachandran, S., additional, Swanson, E., additional, and Winter, P., additional
Published: 2021
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22. Technical design of the phase I Mu3e experiment

Author: Betancourt, C, Straumann, Ulrich, Gredig, Roman, Owen, P, Robmann, Peter, Steinkamp, Olaf, Cadoux, F, Chavez Barajas, C, Chen, H, Clark, K, Cooke, P, Corrodi, S, Damyanova, A, Demets, Y, Dittmeier, S, Eckert, P, Ehrler, F, Fahrni, D, Gagneur, S, Gerritzen, L, Goldstein, J, Gottschalk, D, Grab, C, Gredig, R, Groves, A, and University of Zurich
Subjects: Nuclear and High Energy Physics, 530 Physics, 3105 Instrumentation, 10192 Physics Institute, 3106 Nuclear and High Energy Physics, Instrumentation
Published: 2021

23. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g-2 Experiment

Author: Albahri, T, Anastasi, A, Badgley, K, Baessler, S, Bailey, I, Baranov, VA, Barlas-Yucel, E, Barrett, T, Bedeschi, F, Berz, M, Bhattacharya, M, Binney, HP, Bloom, P, Bono, J, Bottalico, E, Bowcock, T, Cantatore, G, Carey, RM, Casey, BCK, Cauz, D, Chakraborty, R, Chang, SP, Chapelain, A, Charity, S, Chislett, R, Choi, J, Chu, Z, Chupp, TE, Conway, A, Corrodi, S, Cotrozzi, L, Crnkovic, JD, Dabagov, S, Debevec, PT, Di Falco, S, Di Meo, P, Di Sciascio, G, Di Stefano, R, Driutti, A, Duginov, VN, Eads, M, Esquivel, J, Farooq, M, Fatemi, R, Ferrari, C, Fertl, M, Fienberg, AT, Fioretti, A, Flay, D, Froemming, NS, Gabbanini, C, Galati, MD, Ganguly, S, Garcia, A, George, J, Gibbons, LK, Gioiosa, A, Giovanetti, KL, Girotti, P, Gohn, W, Gorringe, T, Grange, J, Grant, S, Gray, F, Haciomeroglu, S, Halewood-Leagas, T, Hampai, D, Han, F, Hempstead, J, Herrod, AT, Hertzog, DW, Hesketh, G, Hibbert, A, Hodge, Z, Holzbauer, JL, Hong, KW, Hong, R, Iacovacci, M, Incagli, M, Kammel, P, Kargiantoulakis, M, Karuza, M, Kaspar, J, Kawall, D, Kelton, L, Keshavarzi, A, Kessler, D, Khaw, KS, Khechadoorian, Z, Khomutov, NV, Kiburg, B, Kiburg, M, Kim, O, Kim, YI, King, B, Kinnaird, N, Kraegeloh, E, Kuchinskiy, NA, Labe, KR, LaBounty, J, Lancaster, M, Lee, MJ, Lee, S, Li, B, Li, D, Li, L, Logashenko, I, Campos, AL, Luca, A, Lukicov, G, Lusiani, A, Lyon, AL, MacCoy, B, Madrak, R, Makino, K, Marignetti, F, Mastroianni, S, Miller, JP, Miozzi, S, Morse, WM, Mott, J, Nath, A, Nguyen, H, Osofsky, R, Park, S, Pauletta, G, Piacentino, GM, Pilato, RN, Pitts, KT, Plaster, B, Pocani, CD, Pohlman, N, Polly, CC, Price, J, Quinn, B, Raha, N, Ramachandran, S, Ramberg, E, Ritchie, JL, Roberts, BL, Rubin, DL, Santi, L, Schlesier, C, Schreckenberger, A, Semertzidis, YK, Shemyakin, D, Smith, MW, Sorbara, M, Stockinger, D, Stapleton, J, Stoughton, C, Stratakis, D, Stuttard, T, Swanson, HE, Sweetmore, G, Sweigart, DA, Syphers, MJ, Teubner, T, Tewsley-Booth, AE, Thomson, K, Tishchenko, V, Tran, NH, Turner, W, Valetov, E, Vasilkova, D, Venanzoni, G, Walton, T, Weisskopf, A, Welty-Rieger, L, Winter, P, Wolski, A, and Wu, W
Subjects: VACUUM POLARIZATION CONTRIBUTIONSMAGNETIC-MOMENT
Abstract: The Muon g - 2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency omega(m)(a) to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment's muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of a(mu) (FNAL) = 116 592 040(54) x 10(-11) (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis, and fitting of the data to measure the precession frequency. It also presents the averaging of the results from the 11 separate determinations of omega(m)(a), and the systematic uncertainties on the result.
Published: 2021

24. Design and performance of an in-vacuum, magnetic field mapping system for the Muon g-2 experiment

Author: Corrodi, S., primary, Lurgio, P. De, additional, Flay, D., additional, Grange, J., additional, Hong, R., additional, Kawall, D., additional, Oberling, M., additional, Ramachandran, S., additional, and Winter, P., additional
Published: 2020
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25. Scintillating fibre detector for the Mu3e experiment

Author: Bravar, S., primary, Corrodi, S., additional, Damyanova, A., additional, Grab, C., additional, Gredig, R., additional, Papa, A., additional, and Rutar, G., additional
Published: 2017
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26. Studies of the high rate coincidence timing response of the STiC and TOFPET ASICs for the SAFIR PET scanner

Author: Becker, R., primary, Casella, C., additional, Corrodi, S., additional, Dissertori, G., additional, Fischer, J., additional, Howard, A., additional, Ito, M., additional, and Lustermann, W., additional
Published: 2016
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27. The MuPix high voltage monolithic active pixel sensor for the Mu3e experiment

Author: Augustin, H., primary, Berger, N., additional, Bravar, S., additional, Corrodi, S., additional, Damyanova, A., additional, Förster, F., additional, Gredig, R., additional, Herkert, A., additional, Huang, Q., additional, Huth, L., additional, Kiehn, M., additional, Kozlinskiy, A., additional, Maldaner, S., additional, Perić, I., additional, Philipp, R., additional, Robmann, P., additional, Schöning, A., additional, Shrestha, S., additional, Bruch, D. vom, additional, Weber, T., additional, and Wiedner, D., additional
Published: 2015
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28. Mu2e Run I Sensitivity Projections for the Neutrinoless $\mu^- \to e^-$ Conversion Search in Aluminum

Author: Abdi, F., Abrams, R., Adentunji, J., Ahmed, W., Alber, R., Alexander, D., Allen, D., Allspach, D., Alvarez-Garcia, C., Ambrose, D., Ambrosio, G., Amirkhanov, A., Andreev, N., Ankenbrandt, C. M., Appleby, R., Arnold, D., Artikov, A., Atanov, N., Badgley, K., Ball, M., Baranov, V., Barker, J., Barnes, E., Barton, B., Bartoszek, L., Bellettini, G., Bernstein, R. H., Bersani, A., Bianchi, I., Biery, K., Bini, S., Blazey, G., Bloise, C., Boedigheimer, K., Boi, S., Bolton, T., Bono, J., Bonventre, R., Borghi, S., Borrel, L., Bossert, R., Bowcock, T., Bowden, M., Brandt, J., Breach, M., Brown, D., Brown, D. N., Brown, G., Brown, H., Budagov, I., Buelher, M., Bulugean, G. -M, Byrum, K., Campbell, M., Cao, H., Carey, R. M., Caron, J. F., Casey, B., Casler, H., Cervelli, F., Cheban, S., Chen, J., Chen, M., Cheng, C. -H, Chislett, R., Chitirasreemadam, N., Chokheli, D., Ciampa, K., Ciolini, R., Coghill, J., Colao, F., Coleman, R. N., Corrodi, S., Crescimbeni, L., Crowley, C., Culbertson, R., Cummings, M. A. C., Daniel, A., Davydov, Y., Demers, S., Deshpande, A., Devilbiss, M., Dey, J., Felice, G., Gouvea, A., Dhanraj, J., Ding, D., Dinnon, M., Diociaiuti, E., Dixon, S., Di Falco, S., Djilkibaev, R., Donati, S., Drake, G., Drendel, B., Duerling, G., Dukes, E. C., Dychkant, A., Echenard, B., Eddy, N., Edmonds, A., Ehrlich, R., Ekka, U., Evans, R., Evbota, D., Fabbricatore, P., Fagan, J., Farinon, S., Farrell, W., Farris, P., Feher, S., Fellenz, B., Fernandez, E., Ferrari, A., Ferrari, C., Finley, J., Flood, K., Flumerfelt, E., Fontana, F., Francis, K., Frand, M., Frank, M., Friedsam, H., Gallo, G., Gandrajula, R. P., Gaponenko, A., Gardner, M., Gargiulo, R., Gaugel, S., Genser, K. L., Gersabeck, M., Ginther, G., Gioiosa, A., Giovannella, S., Giusti, V., Glagolev, V., Glass, H., Glenzinski, D. A., Goadhouse, S., Goodenough, L., Grancagnolo, F., Gray, P., Group, C., Hahn, A., Hampai, D., Hansen, S., Happacher, F., Harkness-Brennan, L., Harrig, K., Hartsell, B., Hays, S., Hedges, M., Hedin, D., Heller, K., Herman, A., Hirsh, S., Hitlin, D. G., Hocker, A., Hooper, R., Horton-Smith, G., Huang, S., Huedem, E., Huffman, D., Hung, P. Q., Hungerford, E., Ibrahim, A., Israel, S., Jenkins, M., Johnstone, C., Jones, M., Jorjadze, V., Judson, D., Kampa, C., Kargiantoulakis, M., Kashikhin, V., Kasper, P., Keshavarzi, A., Khalatian, V., Kim, J. -H, Kiper, T., Knapp, D., Knodel, O., Knoepfel, K., Kokosa, L., Kolomensky, Yu G., Koltick, D., Kozlovsky, M., Kozminski, J., Kracczyk, G., Kramp, M., Krave, S., Krempetz, K., Kutschke, R. K., Kwarciany, R., Lackowski, T., Lamm, M. J., Lancaster, M., Larwill, M., Leavell, F., Lee, M. J., Leeb, D., Lema-Sinchi, J., Leveling, T., Lewis, R., Ley, A., Li, B., Li, Y., Lin, D., Lincoln, D., Logashenko, I., Lombardo, V., Lopes, M. L., Luca, A., Lynch, K. R., Mackenzie, M., Makulski, A., Manolis, J., Maravin, Yu, Marciano, W. J., Marini, A., Martin, E., Martinez, A., Martini, M., Mcarthur, D., Mcconologue, F., Mesmer, N., Messerly, B., Michelotti, L., Middleton, S., Miles, C., Miller, J. P., Nguyen, T. M., Miscetti, S., Mitchell, D., Miyashita, T., Mokhov, N., Molenaar, D., Molzon, W., Moore, J., Morescalchi, L., Morgan, J., Mott, J., Motuk, E., Mueller, S., Mukherjee, A., Murat, P., Musenich, R., Nagaslaev, V., Narayanan, A., Neely, R., Neuffer, D. V., Nguyen, M. T., Nicol, T., Niehoff, J., Nogiec, J., Norman, A., Northrup, K., O, V., Oh, S., Oksuzian, Yu, Olderr, P., Olson, M., Orris, D., Oshinowo, B., Ostojic, R., Oyang, J., Paesani, D., Pagan, S., Page, T., Palladino, A., Park, C., Pasciuto, D., Pedreschi, E., Peterson, T., Pezzullo, G., Pilipenko, R., Pla-Dalmau, A., Plesniak, P., Pohlman, N., Pollack, B., Poloubotko, V., Popovic, M., Popp, J. L., Frank C. Porter, Prebys, E. J., Price, J., Prieto, P., Pronskikh, V., Pushka, D., Quirk, J., Rabehl, R., Rachamin, R., Raffaelli, F., Ragheb, A., Rakness, G., Ray, R. E., Rechenmacher, R., Rivera, R., Rizzo, G., Roberts, B. L., Roberts, S., Roberts, T. J., Robotham, W., Roehrken, M., Rubinov, P., Rucinski, R., Rusu, V. L., Samavat, M. F., Sanzani, E., Saputi, A., Sarra, I., Sarychev, M., Scarpine, V., Schappert, W., Schmitt, M., Schmitter, P., Schoo, D., Schumacher, K., Shi, X., Singh, V., Sobering, T., Soleti, R., Solt, M., Song, H., Song, E., Spinella, F., Srivastav, M., Stefanik, A., Stetzler, S., Still, D., Stortini, M., Stratakis, D., Strauss, T., Sun, Y., Suslov, I., Syphers, M. J., Szemraj, L., Ta, J., Taffara, A., Tang, Z., Tanovic, N., Tartaglia, M., Tassielli, G., Taylor, R., Tecchio, M., Tickle, S., Tinsley, D., Tope, T., Torkelson, A., Tran, N., Trevor, J., Tschirhart, R. S., Turnberg, S., Uzunyan, S., Varier, D., Velasco, M., Vinas, L., Vitali, B., Vogel, G., Wagner, R., Wands, R., Wang, Y., Wang, C., Wang, M., Wardlaw, I., Warren, M., Werkema, S., White, Jr H. B., 11, J., Whitmore, J., Wielgos, R., Wildberger, R., Wills, L., Winter, P., Woods, R., Worel, C., Wu, Y., Xia, L., You, Z., Yucel, M., Zadeh, P., Zanetti, A. M., Zhadan, D., Zhu, R. -Y, Zifko, R., and Zutshi, V.

29. Mu2e-II: Muon to electron conversion with PIP-II

Author: Byrum, K., Corrodi, S., Oksuzian, Y., Winter, P., Xia, L., Edmonds, A. W. J., Miller, J. P., Mott, J., Marciano, W. J., Szafron, R., Bonventre, R., Brown, D. N., Kolomensky, Yu G., Ning, O., Singh, V., Prebys, E., Léo Borrel, Echenard, B., Hitlin, D. G., Hu, C., Lin, D. X., Middleton, S., Porter, F. C., Zhang, L., Zhu, R. -Y, Ambrose, D., Badgley, K., Bernstein, R. H., Boi, S., Casey, B. C. K., Culbertson, R., Gaponenko, A., Glass, H. D., Glenzinski, D., Goodenough, L., Hocker, A., Kargiantoulakis, M., Kashikhin, V., Kiburg, B., Kutschke, R. K., Murat, P. A., Neuffer, D., Pronskikh, V. S., Pushka, D., Rakness, G., Strauss, T., Yucel, M., Bloise, C., Diociaiuti, E., Giovannella, S., Happacher, F., Miscetti, S., Sarra, I., Martini, M., Ferrari, A., Müller, S. E., Rachamin, R., Barlas-Yucel, E., Artikov, A., Atanov, N., Davydov, Yu I., Glagolev, V., Vasilyev, I. I., Uesaka, Y., Denisov, S. P., Evdokimov, V., Kozelov, A. V., Popov, A. V., Vasilyev, I. A., Tassielli, G., Teubner, T., Chislett, R. T., Hesketh, G. G., Lancaster, M., Campbell, M., Ciampa, K., Heller, K., Messerly, B., Cummings, M. A. C., Calibbi, L., Blazey, G. C., Syphers, M. J., Zutshi, V., Kampa, C., Mackenzie, M., Di Falco, S., Donati, S., Gioiosa, A., Giusti, V., Morescalchi, L., Pasciuto, D., Pedreschi, E., Spinella, F., Hedges, M. T., Jones, M., You, Z. Y., Zanetti, A. M., Valetov, E. V., Dukes, E. C., Ehrlich, R., Group, R. C., Heeck, J., Hung, P. Q., Demers, S. M., Pezzullo, G., Lynch, K. R., and Popp, J. L.

30. Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment

Author: PIONEER Collaboration, Altmannshofer, W., Binney, H., Blucher, E., Bryman, D., Caminada, L., Chen, S., Cirigliano, V., Corrodi, S., Crivellin, A., Cuen-Rochin, S., Di Canto, A., Doria, L., Gaponenko, A., Garcia, A., Gibbons, L., Glaser, C., Godoy, M. Escobar, G��ldi, D., Gori, S., Gorringe, T., Hertzog, D., Hodge, Z., Hoferichter, M., Ito, S., Iwamoto, T., Kammel, P., Kiburg, B., Labe, K., LaBounty, J., Langenegger, U., Malbrunot, C., Mazza, S. M., Mihara, S., Mischke, R., Mori, T., Mott, J., Numao, T., Ootani, W., Ott, J., Pachal, K., Polly, C., Po��ani��, D., Qian, X., Ries, D., Roehnelt, R., Schumm, B., Schwendimann, P., Seiden, A., Sher, A., Shrock, R., Soter, A., Sullivan, T., Tarka, M., Tischenko, V., Tricoli, A., Velghe, B., Wong, V., Worcester, E., Worcester, M., and Zhang, C.
Subjects: Physics - Instrumentation and Detectors, hep-ex, High Energy Physics::Phenomenology, FOS: Physical sciences, hep-ph, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Experiment, Detectors and Experimental Techniques, physics.ins-det, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract: The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are described. Phase I of the PIONEER experiment, which was proposed and approved at Paul Scherrer Institut, aims at measuring the charged-pion branching ratio to electrons vs.\ muons, $R_{e/\mu}$, 15 times more precisely than the current experimental result, reaching the precision of the Standard Model (SM) prediction at 1 part in $10^4$. Considering several inconsistencies between the SM predictions and data pointing towards the potential violation of lepton flavor universality, the PIONEER experiment will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles up to the PeV mass scale. The later phases of the PIONEER experiment aim at improving the experimental precision of the branching ratio of pion beta decay (BRPB), $\pi^+\to \pi^0 e^+ \nu (\gamma)$, currently at $1.036(6)\times10^{-8}$, by a factor of three (Phase II) and an order of magnitude (Phase III). Such precise measurements of BRPB will allow for tests of CKM unitarity in light of the Cabibbo Angle Anomaly and the theoretically cleanest extraction of $|V_{ud}|$ at the 0.02\% level, comparable to the deduction from superallowed beta decays., Comment: contribution to Snowmass 2021 based on the PIONEER proposal (arXiv:2203.01981)

31. Technical design of the phase I Mu3e experiment

Author: Arndt, K., Augustin, H., Baesso, P., Berger, N., Berg, F., Betancourt, C., Bortoletto, D., Bravar, A., Briggl, K., Vom Bruch, D., Buonaura, A., Cadoux, F., Chavez Barajas, C., Chen, H., Clark, K., Cooke, P., Corrodi, S., Damyanova, A., Demets, Y., Dittmeier, S., Eckert, P., Ehrler, F., Fahrni, D., Gagneur, S., Gerritzen, L., Goldstein, J., Gottschalk, D., Grab, C., Gredig, R., Groves, A., Hammerich, J., Hartenstein, U., Hartmann, U., Hayward, H., Herkert, A., Hesketh, G., Hetzel, S., Hildebrandt, M., Hodge, Z., Hofer, A., Huang, Q.H., Hughes, S., Huth, L., Immig, D.M., Jones, T., Jones, M., K��stli, H.-C., K��ppel, M., Kettle, P.-R., Kiehn, M., Kilani, S., Klingenmeyer, H., Knecht, A., Knight, A., Kotlinski, B., Kozlinskiy, A., Leys, R., Lockwood, G., Loreti, A., La Marra, D., M��ller, M., Meier, B., Meier Aeschbacher, F., Meneses, A., Metodiev, K., Mtchedlishvili, A., Muley, S., Munwes, Y., Noehte, L.O.S., Owen, P., Papa, A., Paraskevas, I., Peri��, I., Perrevoort, A.-K., Plackett, R., Pohl, M., Ritt, S., Robmann, P., Rompotis, N., Rudzki, T., Rutar, G., Sch��ning, A., Schimassek, R., Schultz-Coulon, H.-C., Serra, N., Shen, W., Shipsey, I., Shrestha, S., Steinkamp, O., Stoykov, A., Straumann, U., Streuli, S., Stumpf, K., Tata, N., Velthuis, J., Vigani, L., Vilella-Figueras, E., Vossebeld, J., Wallny, R., Wasili, A., Wauters, F., Weber, A., Wiedner, D., Windelband, B., and Zhong, T.
Subjects: Physics::Instrumentation and Detectors, High Energy Physics::Experiment, 7. Clean energy
Abstract: The Mu3e experiment aims to find or exclude the lepton flavour violating decay ��eee at branching fractions above 10��16. A first phase of the experiment using an existing beamline at the Paul Scherrer Institute (PSI) is designed to reach a single event sensitivity of 2��10��15. We present an overview of all aspects of the technical design and expected performance of the phase I Mu3e detector. The high rate of up to 108 muon decays per second and the low momenta of the decay electrons and positrons pose a unique set of challenges, which we tackle using an ultra thin tracking detector based on high-voltage monolithic active pixel sensors combined with scintillating fibres and tiles for precise timing measurements.

32. Magnetic-field measurement and analysis for the Muon g-2 Experiment at Fermilab

Author: Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., and Debevec, P. T.

33. Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab

Author: Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., and Di Falco, S.

34. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g-2 Experiment

Author: Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., and Dabagov, S.

35. Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab

Author: Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., and Di Falco, S.

36. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon g-2 Experiment

Author: Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., and Dabagov, S.

37. Magnetic-field measurement and analysis for the Muon g-2 Experiment at Fermilab

Author: Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Albahri, T., Anastasi, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C.K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., and Debevec, P. T.

38. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon <math><mi>g</mi><mo>−</mo><mn>2</mn></math> Experiment

Author: P. Bloom, P. Kammel, Timothy Chupp, C. Schlesier, P. Girotti, M. J. Lee, A. Nath, Frederick Gray, C. Gabbanini, D. Shemyakin, C. C. Polly, L. Cotrozzi, V. N. Duginov, G. Venanzoni, T. Stuttard, G. Lukicov, M. Iacovacci, H. E. Swanson, T. P. Gorringe, B. C.K. Casey, J. Grange, N. H. Tran, K. W. Hong, K. T. Pitts, R. T. Chislett, Fabrizio Marignetti, A. Lucà, Martin Fertl, E. Barlas-Yucel, J. George, A. Kuchibhotla, Dariush Hampai, T. Walton, D. Cauz, G. Sweetmore, J. Bono, I. R. Bailey, Dinko Pocanic, J. L. Holzbauer, Gavin Grant Hesketh, J. L. Ritchie, Alexander Keshavarzi, H. P. Binney, A. García, Manolis Kargiantoulakis, A. Basti, Barry King, B. MacCoy, M. Kiburg, David Rubin, Alexey Anisenkov, V. Tishchenko, Marin Karuza, H. Nguyen, P. Di Meo, Claudio Ferrari, N. Kinnaird, Liang Li, L. K. Gibbons, N. Raha, R. Chakraborty, D. Flay, R. N. Pilato, M. Incagli, M. Lancaster, Michael Syphers, S. Baeßler, T. J. V. Bowcock, J. LaBounty, G. M. Piacentino, D. Vasilkova, S. Park, A. Lusiani, T. Albahri, R. Madrak, Z. Hodge, Dominik Stöckinger, A. Chapelain, Brad Plaster, R. M. Carey, Dongdong Li, J. D. Crnkovic, D. W. Hertzog, Selcuk Haciomeroglu, J. P. Miller, Andrzej Wolski, Tabitha Halewood-leagas, Franco Bedeschi, B. L. Roberts, S. Grant, J. Fry, Kyoko Makino, J.B. Hempstead, S. Di Falco, K. S. Khaw, W. Turner, Z. Chu, A. T. Herrod, J. D. Price, T. Barrett, N. V. Khomutov, M. Farooq, P. Winter, J. Stapleton, R. Fatemi, D. Kawall, S. Charity, L. Santi, A. Schreckenberger, E. Valetov, B. Quinn, Yannis K. Semertzidis, B. Li, K. L. Giovanetti, A. E. Tewsley-Booth, S. Lee, Ran Hong, S. Leo, M. D. Galati, A.T. Fienberg, Sultan B. Dabagov, S. P. Chang, L. Kelton, G. Pauletta, Rachel Osofsky, G. Di Sciascio, S. Ganguly, D.A. Sweigart, Meghna Bhattacharya, Thomas Teubner, A. Gioiosa, S. Miozzi, B. Kiburg, J. Esquivel, A. Lorente Campos, David Kessler, E. Bottalico, M. Sorbara, Christopher Stoughton, J. Mott, Kayleigh Anne Thomson, Giovanni Cantatore, A. Fioretti, A. Anastasi, Wanwei Wu, Karie Badgley, S. Mastroianni, O. Kim, William Morse, L. Welty-Rieger, A. L. Lyon, A. Hibbert, A. Weisskopf, P. T. Debevec, W. Gohn, E. J. Ramberg, R. Di Stefano, E. Kraegeloh, Martin Berz, Z. Khechadoorian, S. Ramachandran, D. Stratakis, S. Corrodi, D. A. Tarazona, V. A. Baranov, J. Choi, F. Han, Nicholas A. Pohlman, M. Eads, I. Logashenko, N. A. Kuchinskiy, M. W. Smith, Y. I. Kim, A. Driutti, J. Kaspar, K. R. Labe, N. S. Froemming, E. Frlež, Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Frlež, E., Froemming, N. S., Fry, J., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Kraegeloh, E., Kuchibhotla, A., Kuchinskiy, N. A., Labe, K. R., Labounty, J., Lancaster, M., Lee, M. J., Lee, S., Leo, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Smith, M. W., Sorbara, M., Stöckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.
Subjects: Physics::Instrumentation and Detectors, Measure (physics), FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Omega, High Energy Physics - Experiment, Nuclear physics, Nuclear Experiment, High Energy Physics - Experiment (hep-ex), muon, 0103 physical sciences, Fermilab, Nuclear Experiment (nucl-ex), 010306 general physics, Larmor precession, Physics, Muon, 010308 nuclear & particles physics, Settore FIS/01 - Fisica Sperimentale, anomalous magnetic moment, 3. Good health, Magnetic field, Physics::Accelerator Physics, High Energy Physics::Experiment, Storage ring, Fermi Gamma-ray Space Telescope
Abstract: The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $\omega_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment's muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of $a_{\mu}({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis and fitting of the data to measure the precession frequency. It also presents the averaging of the results from the eleven separate determinations of \omega_a, and the systematic uncertainties on the result., Comment: 29 pages, 19 figures. Published in Physical Review D
Published: 2021

39. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon Experiment

Author: T. Albahri, A. Anastasi, A. Anisenkov, K. Badgley, S. Bae??ler, I. Bailey, V. ???A. Baranov, E. Barlas-Yucel, T. Barrett, A. Basti, F. Bedeschi, M. Berz, M. Bhattacharya, H. ???P. Binney, P. Bloom, J. Bono, E. Bottalico, T. Bowcock, G. Cantatore, R. ???M. Carey, B. ???C. ???K. Casey, D. Cauz, R. Chakraborty, S. ???P. Chang, A. Chapelain, S. Charity, R. Chislett, J. Choi, Z. Chu, T. ???E. Chupp, S. Corrodi, L. Cotrozzi, J. ???D. Crnkovic, S. Dabagov, P. ???T. Debevec, S. Di Falco, P. Di Meo, G. Di Sciascio, R. Di Stefano, A. Driutti, V. ???N. Duginov, M. Eads, J. Esquivel, M. Farooq, R. Fatemi, C. Ferrari, M. Fertl, A. ???T. Fienberg, A. Fioretti, D. Flay, E. Frle??, N. ???S. Froemming, J. Fry, C. Gabbanini, M. ???D. Galati, S. Ganguly, A. Garcia, J. George, L. ???K. Gibbons, A. Gioiosa, K. ???L. Giovanetti, P. Girotti, W. Gohn, T. Gorringe, J. Grange, S. Grant, F. Gray, S. Haciomeroglu, T. Halewood-Leagas, D. Hampai, F. Han, J. Hempstead, A. ???T. Herrod, D. ???W. Hertzog, G. Hesketh, A. Hibbert, Z. Hodge, J. ???L. Holzbauer, K. ???W. Hong, R. Hong, M. Iacovacci, M. Incagli, P. Kammel, M. Kargiantoulakis, M. Karuza, J. Kaspar, D. Kawall, L. Kelton, A. Keshavarzi, D. Kessler, K. ???S. Khaw, Z. Khechadoorian, N. ???V. Khomutov, B. Kiburg, M. Kiburg, O. Kim, Y. ???I. Kim, B. King, N. Kinnaird, E. Kraegeloh, A. Kuchibhotla, N. ???A. Kuchinskiy, K. ???R. Labe, J. LaBounty, M. Lancaster, M. ???J. Lee, S. Lee, S. Leo, B. Li, D. Li, L. Li, I. Logashenko, A. Lorente Campos, A. Luc??, G. Lukicov, A. Lusiani, A. ???L. Lyon, B. MacCoy, R. Madrak, K. Makino, F. Marignetti, S. Mastroianni, J. ???P. Miller, S. Miozzi, W. ???M. Morse, J. Mott, A. Nath, H. Nguyen, R. Osofsky, S. Park, G. Pauletta, G. ???M. Piacentino, R. ???N. Pilato, K. ???T. Pitts, B. Plaster, D. Po??ani??, N. Pohlman, C. ???C. Polly, J. Price, B. Quinn, N. Raha, S. Ramachandran, E. Ramberg, J. ???L. Ritchie, B. ???L. Roberts, D. ???L. Rubin, L. Santi, C. Schlesier, A. Schreckenberger, Y. ???K. Semertzidis, D. Shemyakin, M. ???W. Smith, M. Sorbara, D. St??ckinger, J. Stapleton, C. Stoughton, D. Stratakis, T. Stuttard, H. ???E. Swanson, G. Sweetmore, D. ???A. Sweigart, M. ???J. Syphers, D. ???A. Tarazona, T. Teubner, A. ???E. Tewsley-Booth, K. Thomson, V. Tishchenko, N. ???H. Tran, W. Turner, E. Valetov, D. Vasilkova, G. Venanzoni, T. Walton, A. Weisskopf, L. Welty-Rieger, P. Winter, A. Wolski, W. Wu, Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Bae??ler, S., Bailey, I., Baranov, V. ???A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. ???P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. ???M., Casey, B. ???C. ???K., Cauz, D., Chakraborty, R., Chang, S. ???P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. ???E., Corrodi, S., Cotrozzi, L., Crnkovic, J. ???D., Dabagov, S., Debevec, P. ???T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. ???N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. ???T., Fioretti, A., Flay, D., Frle??, E., Froemming, N. ???S., Fry, J., Gabbanini, C., Galati, M. ???D., Ganguly, S., Garcia, A., George, J., Gibbons, L. ???K., Gioiosa, A., Giovanetti, K. ???L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. ???T., Hertzog, D. ???W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. ???L., Hong, K. ???W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. ???S., Khechadoorian, Z., Khomutov, N. ???V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. ???I., King, B., Kinnaird, N., Kraegeloh, E., Kuchibhotla, A., Kuchinskiy, N. ???A., Labe, K. ???R., Labounty, J., Lancaster, M., Lee, M. ???J., Lee, S., Leo, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Luc??, A., Lukicov, G., Lusiani, A., Lyon, A. ???L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. ???P., Miozzi, S., Morse, W. ???M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. ???M., Pilato, R. ???N., Pitts, K. ???T., Plaster, B., Po??ani??, D., Pohlman, N., Polly, C. ???C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. ???L., Roberts, B. ???L., Rubin, D. ???L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. ???K., Shemyakin, D., Smith, M. ???W., Sorbara, M., St??ckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. ???E., Sweetmore, G., Sweigart, D. ???A., Syphers, M. ???J., Tarazona, D. ???A., Teubner, T., Tewsley-Booth, A. ???E., Thomson, K., Tishchenko, V., Tran, N. ???H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.
Abstract: The Muon g−2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency ωma to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment’s muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of aμ(FNAL)=116592040(54)×10−11 (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis, and fitting of the data to measure the precession frequency. It also presents the averaging of the results from the 11 separate determinations of ωma, and the systematic uncertainties on the result.
Published: 2021

40. Magnetic Field Measurement and Analysis for the Muon g-2 Experiment at Fermilab

Author: Z. Chu, M. Eads, M. Lancaster, T. Halewood-Leagas, D. Flay, I. Logashenko, N. A. Kuchinskiy, M. W. Smith, Y. I. Kim, S.B. Dabagov, B. MacCoy, N. H. Tran, K. W. Hong, Liang Li, L. Santi, A. Chapelain, K. S. Khaw, K. T. Pitts, R. Fatemi, I. R. Bailey, E. Bottalico, Andrzej Wolski, R. N. Pilato, P. Bloom, M. Iacovacci, G. Pauletta, M. Incagli, R. Di Stefano, Timothy Chupp, E. Barlas-Yucel, G. Di Sciascio, G. Sweetmore, D. Cauz, P. Girotti, H. Nguyen, Thomas Teubner, D.A. Sweigart, A. E. Tewsley-Booth, G. Piacentino, D. Stöckinger, Karie Badgley, L. Kelton, P. Winter, Brad Plaster, J. L. Holzbauer, R. Chislett, B. Quinn, R. M. Carey, A. Conway, Kyoko Makino, A. Hibbert, B. C. K. Casey, A. Driutti, J. George, A. Lorente Campos, W. Turner, A. Lucà, S. Ramachandran, W. Wu, G. Hesketh, E. Valetov, E. Kraegeloh, Franco Bedeschi, A. Gioiosa, P. T. Debevec, L. Cotrozzi, V. N. Duginov, S. Corrodi, S. Miozzi, Yannis K. Semertzidis, M. J. Lee, S. Mastroianni, P. Di Meo, Martin Berz, K. L. Giovanetti, D. Stratakis, G. Lukicov, C. Gabbanini, J.B. Hempstead, A. Weisskopf, V. Tishchenko, B. Kiburg, H. E. Swanson, O. Kim, Michael Syphers, R. Osofsky, T. Stuttard, J. Esquivel, Dariush Hampai, T. J. V. Bowcock, Adam L. Lyon, Z. Khechadoorian, Meghna Bhattacharya, T. Barrett, Martin Fertl, D. Shemyakin, V. A. Baranov, Manolis Kargiantoulakis, R. Madrak, Marin Karuza, D. Vasilkova, S. Park, N. Kinnaird, A. Lusiani, T. Albahri, E. Ramberg, Nicholas A. Pohlman, D. Kawall, A. Schreckenberger, J. L. Ritchie, A. T. Herrod, Selcuk Haciomeroglu, L. K. Gibbons, J. Stapleton, Fabrizio Marignetti, K. Thomson, J. LaBounty, W. Gohn, G. Venanzoni, B. Li, Claudio Ferrari, Dinko Pocanic, S. P. Chang, S. Charity, T. Walton, T. P. Gorringe, Benjamin T. King, A. Fioretti, A. Anastasi, Sudeshna Ganguly, S. Lee, Ran Hong, M. D. Galati, A.T. Fienberg, William Morse, L. Welty-Rieger, Alejandro Garcia, J. Grange, J. Choi, Dongdong Li, D. W. Hertzog, A. Keshavarzi, M. Sorbara, F. Han, J. Bono, J. Mott, P. Kammel, C. Schlesier, Giovanni Cantatore, S. Di Falco, R. Chakraborty, C. C. Polly, J. P. Miller, M. Kiburg, J. Kaspar, David Rubin, S. Baeßler, K. R. Labe, N. S. Froemming, H. P. Binney, B. L. Roberts, S. Grant, J. Price, N. Raha, Z. Hodge, N. V. Khomutov, M. Farooq, Jason Crnkovic, D. A. Tarazona, C. Stoughton, A. Nath, Frederick Gray, David Kessler, Albahri, T., Anastasi, A., Badgley, K., Baessler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Froemming, N. S., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Kraegeloh, E., Kuchinskiy, N. A., Labe, K. R., Labounty, J., Lancaster, M., Lee, M. J., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Luca, A., Lukicov, G., Lusiani, A., Lyon, A. L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Pocanic, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Smith, M. W., Sorbara, M., Stockinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., Wu, W., Baeßler, S., Lucà, A., Počanić, D., and Stöckinger, D.
Subjects: Field (physics), Physics::Instrumentation and Detectors, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Omega, High Energy Physics - Experiment, 010305 fluids & plasmas, Nuclear physics, High Energy Physics - Experiment (hep-ex), muon, 0103 physical sciences, Proton spin crisis, Fermilab, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Larmor precession, Physics, Muon, Settore FIS/01 - Fisica Sperimentale, VACUUM POLARIZATION CONTRIBUTIONSTEMPERATURE-DEPENDENCEPROTON NMRMOMENTSUSCEPTIBILITYTERMS, anomalous magnetic moment, Muon g-2 Experiment, anomalous precession frequency, Magnetic field, anomalous precession frequency, Muon g-2 Experiment, Fermi Gamma-ray Space Telescope
Abstract: The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of the muon to a combined precision of 0.46 parts per million with data collected during its first physics run in 2018. This paper documents the measurement of the magnetic field in the muon storage ring. The magnetic field is monitored by nuclear magnetic resonance systems and calibrated in terms of the equivalent proton spin precession frequency in a spherical water sample at 34.7$^\circ$C. The measured field is weighted by the muon distribution resulting in $\tilde{\omega}'^{}_p$, the denominator in the ratio $\omega^{}_a$/$\tilde{\omega}'^{}_p$ that together with known fundamental constants yields $a^{}_\mu$. The reported uncertainty on $\tilde{\omega}'^{}_p$ for the Run-1 data set is 114 ppb consisting of uncertainty contributions from frequency extraction, calibration, mapping, tracking, and averaging of 56 ppb, and contributions from fast transient fields of 99 ppb., Comment: Added one citation and corrected missing normalization in Eqs (35) and (36)
Published: 2021
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41. Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab

Author: K. S. Khaw, C. Schlesier, Diktys Stratakis, R. Fatemi, S. Corrodi, D. Newton, K. T. Pitts, R. T. Chislett, L. K. Gibbons, Kyoko Makino, E. Bottalico, A. Gioiosa, J. LaBounty, J. Bono, I. R. Bailey, P. Kammel, D. Kawall, T. J. V. Bowcock, H. P. Binney, W. Turner, A. T. Herrod, S. Miozzi, A. Schreckenberger, E. Valetov, N. H. Tran, K. W. Hong, J. Esquivel, M. Sorbara, Christopher Stoughton, Fabrizio Marignetti, A. Lucà, L. Kelton, M. Eads, D. Stöckinger, T. Barrett, G. Piacentino, J. Mott, S. Baeßler, Bck Casey, Kayleigh Anne Thomson, Giovanni Cantatore, Rachel Osofsky, M. Kiburg, E. Barlas-Yucel, Michael Syphers, C. C. Polly, J. Choi, R. Chakraborty, D. Flay, David Rubin, J. Grange, N. A. Kuchinskiy, M. W. Smith, G. Lukicov, M. Iacovacci, G. Pauletta, J. L. Ritchie, B. MacCoy, L. Cotrozzi, V. N. Duginov, A. Lorente Campos, S. Lee, Ran Hong, G. Sweetmore, D.A. Sweigart, M. Korostelev, Dongdong Li, D. W. Hertzog, Alexander Keshavarzi, G. Di Sciascio, Alejandro L. Garcia, Liang Li, F. Han, D. Sathyan, A.T. Fienberg, Sultan B. Dabagov, M. J. Lee, S. P. Chang, Benjamin T. King, Marin Karuza, R. N. Pilato, M. Incagli, J.B. Hempstead, B. Quinn, L. Santi, N. Kinnaird, F. Gray, P. Winter, L. Welty-Rieger, Meghna Bhattacharya, H. Nguyen, P. Di Meo, T. Stuttard, A. L. Lyon, David Kessler, A. Chapelain, J. Kaspar, B. Li, Galati, Sudeshna Ganguly, Andrzej Wolski, A. Driutti, D. A. Tarazona, Brad Plaster, R. M. Carey, D. Cauz, G. Venanzoni, J. Fry, B. Kiburg, J. P. Miller, W. Gohn, B. L. Roberts, S. Grant, V. A. Baranov, Nicholas A. Pohlman, N. V. Khomutov, M. Farooq, Jason Crnkovic, A. Hibbert, K. R. Labe, P. T. Debevec, Thomas Teubner, S. Di Falco, J. D. Price, Yi Kim, I.B. Logashenko, Yannis K. Semertzidis, K. L. Giovanetti, A. E. Tewsley-Booth, E. Frlež, Martin Berz, S. Charity, T. Walton, Z. Khechadoorian, S. Ramachandran, A. Fiedler, T. P. Gorringe, William Morse, A. Fioretti, A. Anastasi, O. Kim, A. Weisskopf, Wanwei Wu, Karie Badgley, S. Mastroianni, J. L. Holzbauer, Manolis Kargiantoulakis, S. Park, A. Lusiani, T. Albahri, R. Madrak, Selcuk Haciomeroglu, Z. Chu, Dariush Hampai, Gavin Grant Hesketh, J. George, Tishchenko, D. Vasilkova, Franco Bedeschi, P. Bloom, Timothy Chupp, P. Girotti, Nathan Froemming, J. Stapleton, Dinko Pocanic, M. Lancaster, C. Gabbanini, N. Raha, H. E. Swanson, Martin Fertl, Z. Hodge, Tabitha Halewood-leagas, E. J. Ramberg, A. Nath, R. Di Stefano, E. Kraegeloh, Claudio Ferrari, Albahri, T., Anastasi, A., Badgley, K., Baessler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fiedler, A., Fienberg, A. T., Fioretti, A., Flay, D., Frlez, E., Froemming, N. S., Fry, J., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Korostelev, M., Kraegeloh, E., Kuchinskiy, N. A., Labe, K. R., Labounty, J., Lancaster, M., Lee, M. J., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Luca, A., Lukicov, G., Lusiani, A., Lyon, A. L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Newton, D., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Pocanic, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Sathyan, D., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Smith, M. W., Sorbara, M., Stockinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.
Subjects: Larmor precession, Physics, Accelerator Physics (physics.acc-ph), Nuclear and High Energy Physics, Muon, Physics and Astronomy (miscellaneous), Anomalous magnetic dipole moment, 010308 nuclear & particles physics, FOS: Physical sciences, Surfaces and Interfaces, 01 natural sciences, High Energy Physics - Experiment, Magnetic field, Nuclear physics, High Energy Physics - Experiment (hep-ex), muon magnetic anomaly, 0103 physical sciences, Physics - Accelerator Physics, Fermilab, Pitch angle, 010306 general physics, G-2 EXPERIMENTFREQUENCY, Storage ring, Beam (structure)
Abstract: This paper presents the beam dynamics systematic corrections and their uncertainties for the Run-1 data set of the Fermilab Muon g-2 Experiment. Two corrections to the measured muon precession frequency $\omega_a^m$ are associated with well-known effects owing to the use of electrostatic quadrupole (ESQ) vertical focusing in the storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through the radial electric field components created by the ESQ system. The correction depends on the stored momentum distribution and the tunes of the ring, which has relatively weak vertical focusing. Vertical betatron motions imply that the muons do not orbit the ring in a plane exactly orthogonal to the vertical magnetic field direction. A correction is necessary to account for an average pitch angle associated with their trajectories. A third small correction is necessary because muons that escape the ring during the storage time are slightly biased in initial spin phase compared to the parent distribution. Finally, because two high-voltage resistors in the ESQ network had longer than designed RC time constants, the vertical and horizontal centroids and envelopes of the stored muon beam drifted slightly, but coherently, during each storage ring fill. This led to the discovery of an important phase-acceptance relationship that requires a correction. The sum of the corrections to $\omega_a^m$ is 0.50 $\pm$ 0.09 ppm; the uncertainty is small compared to the 0.43 ppm statistical precision of $\omega_a^m$., Comment: 35 pages, 29 figures. Accepted by Phys. Rev. Accel. Beams
Published: 2021
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42. Systematic and statistical uncertainties of the hilbert-transform based high-precision FID frequency extraction method.

Author: Hong R, Corrodi S, Charity S, Baeßler S, Bono J, Chupp T, Fertl M, Flay D, García A, George J, Giovanetti KL, Gorringe T, Grange J, Hong KW, Kawall D, Kiburg B, Li B, Li L, Osofsky R, Počanić D, Ramachandran S, Smith M, Swanson HE, Tewsley-Booth A, Winter P, Yang T, and Zheng K
Abstract: Pulsed nuclear magnetic resonance (NMR) is widely used in high-precision magnetic field measurements. The absolute value of the magnetic field is determined from the precession frequency of nuclear magnetic moments. The Hilbert transform is one of the methods that have been used to extract the phase function from the observed free induction decay (FID) signal and then its frequency. In this paper, a detailed implementation of a Hilbert-transform based FID frequency extraction method is described, and it is briefly compared with other commonly used frequency extraction methods. How artifacts and noise level in the FID signal affect the extracted phase function are derived analytically. A method of mitigating the artifacts in the extracted phase function of an FID is discussed. Correlations between noises of the phase function samples are studied for different noise spectra. We discovered that the error covariance matrix for the extracted phase function is nearly singular and improper for constructing the χ 2 used in the fitting routine. A down-sampling method for fixing the singular covariance matrix has been developed, so that the minimum χ 2 -fit yields properly the statistical uncertainty of the extracted frequency. Other practical methods of obtaining the statistical uncertainty are also discussed., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier Inc. All rights reserved.)
Published: 2021
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