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From Commissioning to Precision Data-Taking: Resolving Operational Challenges in the Nab Detector Systems

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Broussard, L. J., Acharya, H., Alarcon, R., Baeßler, S., Benoit, M., Borah, K., Britton, C. L., Brown, E., Choi, J., Clymer, S., Crawford, C., Ericson, N., Fabris, L., Fomin, N., Fry, J., Godri, R., Gonzalez, F. M., Hagemeier, A., Hamblen, J., Hollander, S., Jezghani, A., Leung, K., Macsai, N., Makela, M., Mathews, D., McGaughey, P. L., Mendelsohn, A., Mirabal, J., Mueller, P. E., Nelsen, A., Penttilä, S. I., Počanić, D., Ramsey, J. C., Reed, K., Richburg, L., Saunders, A., Schreyer, W., Shelby, A., Young, A. R.
Formato:	Preprint
Publicado:	2025
Materias:	Instrumentation and Detectors Nuclear Experiment
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866915629275021312
author	Broussard, L. J. Acharya, H. Alarcon, R. Baeßler, S. Benoit, M. Borah, K. Britton, C. L. Brown, E. Choi, J. Clymer, S. Crawford, C. Ericson, N. Fabris, L. Fomin, N. Fry, J. Godri, R. Gonzalez, F. M. Hagemeier, A. Hamblen, J. Hollander, S. Jezghani, A. Leung, K. Macsai, N. Makela, M. Mathews, D. McGaughey, P. L. Mendelsohn, A. Mirabal, J. Mueller, P. E. Nelsen, A. Penttilä, S. I. Počanić, D. Ramsey, J. C. Reed, K. Richburg, L. Saunders, A. Schreyer, W. Shelby, A. Young, A. R.
author_facet	Broussard, L. J. Acharya, H. Alarcon, R. Baeßler, S. Benoit, M. Borah, K. Britton, C. L. Brown, E. Choi, J. Clymer, S. Crawford, C. Ericson, N. Fabris, L. Fomin, N. Fry, J. Godri, R. Gonzalez, F. M. Hagemeier, A. Hamblen, J. Hollander, S. Jezghani, A. Leung, K. Macsai, N. Makela, M. Mathews, D. McGaughey, P. L. Mendelsohn, A. Mirabal, J. Mueller, P. E. Nelsen, A. Penttilä, S. I. Počanić, D. Ramsey, J. C. Reed, K. Richburg, L. Saunders, A. Schreyer, W. Shelby, A. Young, A. R.
contents	Our understanding of the weak mixing of quarks, described by the Cabibbo Kobayashi Maskawa (CKM) matrix, currently presents an anomaly. Thanks to major strides in both theory and experiment, improved precision in determinations of the first row of matrix elements has revealed disagreement with the expectation of unitarity. The Nab experiment at the Spallation Neutron Source is designed to precisely extract the first matrix element $V_{ud}$ and shed light on experimental tensions within the neutron beta decay dataset. Nab's asymmetric spectrometer allows coincident reconstruction of the decay proton and electron energies, which will be used to determine the electron-neutrino correlation coefficient, and thus (with the neutron lifetime) determine $V_{ud}$. This unique approach has provided a more comprehensive view of neutron beta decay, including a first observation of the full momentum phase space of the decay above detector thresholds and limits on exotic neutron states. Recent upgrades to the Nab detector system have improved the robustness and stability of the detector performance in terms of proton detection efficiency, noise performance, and detector segment availability, setting the stage for high precision physics data-taking.
format	Preprint
id	arxiv_https___arxiv_org_abs_2511_16678
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	From Commissioning to Precision Data-Taking: Resolving Operational Challenges in the Nab Detector Systems Broussard, L. J. Acharya, H. Alarcon, R. Baeßler, S. Benoit, M. Borah, K. Britton, C. L. Brown, E. Choi, J. Clymer, S. Crawford, C. Ericson, N. Fabris, L. Fomin, N. Fry, J. Godri, R. Gonzalez, F. M. Hagemeier, A. Hamblen, J. Hollander, S. Jezghani, A. Leung, K. Macsai, N. Makela, M. Mathews, D. McGaughey, P. L. Mendelsohn, A. Mirabal, J. Mueller, P. E. Nelsen, A. Penttilä, S. I. Počanić, D. Ramsey, J. C. Reed, K. Richburg, L. Saunders, A. Schreyer, W. Shelby, A. Young, A. R. Instrumentation and Detectors Nuclear Experiment Our understanding of the weak mixing of quarks, described by the Cabibbo Kobayashi Maskawa (CKM) matrix, currently presents an anomaly. Thanks to major strides in both theory and experiment, improved precision in determinations of the first row of matrix elements has revealed disagreement with the expectation of unitarity. The Nab experiment at the Spallation Neutron Source is designed to precisely extract the first matrix element $V_{ud}$ and shed light on experimental tensions within the neutron beta decay dataset. Nab's asymmetric spectrometer allows coincident reconstruction of the decay proton and electron energies, which will be used to determine the electron-neutrino correlation coefficient, and thus (with the neutron lifetime) determine $V_{ud}$. This unique approach has provided a more comprehensive view of neutron beta decay, including a first observation of the full momentum phase space of the decay above detector thresholds and limits on exotic neutron states. Recent upgrades to the Nab detector system have improved the robustness and stability of the detector performance in terms of proton detection efficiency, noise performance, and detector segment availability, setting the stage for high precision physics data-taking.
title	From Commissioning to Precision Data-Taking: Resolving Operational Challenges in the Nab Detector Systems
topic	Instrumentation and Detectors Nuclear Experiment
url	https://arxiv.org/abs/2511.16678