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   Newton, William G.; Preston, Rebecca; Balliet, Lauren; Ross, Michael (November 2022, Physics Letters B)
2. The neutron electric dipole moment experiment at the Spallation Neutron Source

   https://doi.org/10.1051/epjconf/201921902005  

   Leung, K.K.H.; Ahmed, M.; Alarcon, R.; Aleksandrova, A.; Baeßler, S.; Barrón-Palos, L.; Bartoszek, L.; Beck, D.H.; Behzadipour, M.; Bessuille, J.; et al (January 2019, EPJ Web of Conferences)

   Novel experimental techniques are required to make the next big leap in neutron electric dipole moment experimental sensitivity, both in terms of statistics and systematic error control. The nEDM experiment at the Spallation Neutron Source (nEDM@SNS) will implement the scheme of Golub & Lamoreaux [Phys. Rep., 237, 1 (1994)]. The unique properties of combining polarized ultracold neutrons, polarized 3 He, and superfluid 4 He will be exploited to provide a sensitivity to ∼ 10 −28   e  · cm. Our cryogenic apparatus will deploy two small (3 L) measurement cells with a high density of ultracold neutrons produced and spin analyzed in situ. The electric field strength, precession time, magnetic shielding, and detected UCN number will all be enhanced compared to previous room temperature Ramsey measurements. Our 3 He co-magnetometer offers unique control of systematic effects, in particular the Bloch-Siegert induced false EDM. Furthermore, there will be two distinct measurement modes: free precession and dressed spin. This will provide an important self-check of our results. Following five years of “critical component demonstration,” our collaboration transitioned to a “large scale integration” phase in 2018. An overview of our measurement techniques, experimental design, and brief updates are described in these proceedings. 

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3. Neutron–Mirror-Neutron Oscillation and Neutron Star Cooling

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4. Neutron detection efficiency of the Neutron dEtector with Xn Tracking (NEXT)

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5. The photon content of the neutron

   https://doi.org/10.1007/JHEP04(2024)022  

   Xie, Keping; Zhou, Bei; Hobbs, T J (April 2024, Journal of High Energy Physics)

   In this work, we complete our CT18qed study with the neutron’s photon parton distribution function (PDF), which is essential for the nucleus scattering phenomenology. Two methods, CT18lux and CT18qed, based on the LUXqed formalism and the DGLAP evolution, respectively, to determine the neutron’s photon PDF have been presented. Various low-Q²non-perturbative variations have been carefully examined, which are treated as additional uncertainties on top of those induced by quark and gluon PDFs. The impacts of the momentum sum rule as well as isospin symmetry violation have been explored and turned out to be negligible. A detailed comparison with other neutron’s photon PDF sets has been performed, which shows a great improvement in the precision and a reasonable uncertainty estimation. Finally, two phenomenological implications are demonstrated with photon-initiated processes: neutrino-nucleusW-boson production, which is important for the near-future TeV–PeV neutrino observations, and the axion-like particle production at a high-energy muon beam-dump experiment. 

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