Measurement of the inclusive electron-neutrino charged-current cross section on ${}^{127}$I with the COHERENT NaI$\nu$E detector

P. An, C. Awe, P. S. Barbeau, B. Becker, V. Belov, I. Bernardi, C. Bock, A. Bolozdynya, R. Bouabid, A. Brown, J. Browning, B. Cabrera-Palmer, M. Cervantes, E. Conley, J. Daughhetee, J. Detwiler, K. Ding, M. R. Durand, Y. Efremenko, S. R. Elliott, L. Fabris, M. Febbraro, A. Gallo Rosso, A. Galindo-Uribarri, A. C. Germer, M. P. Green, J. Hakenmueller, M. R. Heath, S. Hedges, M. Hughes, B. A. Johnson, T. Johnson, A. Khromov, A. Konovalov, E. Kozlova, A. Kumpan, O. Kyzylova, L. Li, J. M. Link, J. Liu, M. Mahoney, A. Major, K. Mann, D. M. Markoff, J. Mastroberti, J. Mattingly, P. E. Mueller, J. Newby, D. S. Parno, S. I. Penttila, D. Pershey, C. G. Prior, R. Rapp, H. Ray, J. Raybern, O. Razuvaeva, D. Reyna, G. C. Rich, J. Ross, D. Rudik, J. Runge, D. J. Salvat, J. Sander, K. Scholberg, A. Shakirov, G. Simakov, G. Sinev, C. Skuse, W. M. Snow, V. Sosnovtsev, T. Subedi, B. Suh, R. Tayloe, K. Tellez-Giron-Flores, Y. -T. Tsai, E. Ujah, J. Vanderwerp, E. E. van Nieuwenhuizen, R. L. Varner, C. J. Virtue, G. Visser, K. Walkup, E. M. Ward, T. Wongjirad, J. Yoo, C. -H. Yu, A. Zawada, J. Zettlemoyer, A. Zderic
Nuclear Experiment, Nuclear Experiment (nucl-ex), High Energy Physics - Experiment (hep-ex)
2023-05-30 16:00:00
Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ${}^{127}$I with neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the heaviest targets for which low-energy ($\leq 50$ MeV) inelastic neutrino-nucleus processes have been measured, and this is the first measurement of its inclusive cross section. After a five-year detector exposure, COHERENT reports a flux-averaged cross section for electron neutrinos produced at a pion decay-at-rest source of $9.2^{+2.1}_{-1.8}\times10^{-40}$ cm$^2$. This corresponds to a value that is $\sim$41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. In addition, the observed visible spectrum from charged-current scattering on ${}^{127}$I has been measured between 10 and 55 MeV, and the exclusive zero-neutron and one-or-more-neutron emission cross sections are measured to be $5.12_{-3.1}^{+3.4} \times 10^{-40}\mbox{ cm}^2$ and $2.2_{-0.5}^{+0.4} \times 10^{-40}\mbox{ cm}^2$, respectively.
PDF: Measurement of the inclusive electron-neutrino charged-current cross section on ${}^{127}$I with the COHERENT NaI$\nu$E detector.pdf
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