A multidimensional study of the structure function ratio σLT′/σ0 from hard exclusive π+ electro-production off protons in the GPD regime

Diehl, S.; Kim, A.; Joo, K.; Achenbach, P.; Akbar, Z.; Amaryan, M.J.; Atac, H.; Avagyan, H.; Ayerbe Gayoso, C.; Baashen, L.; Barion, L.; Bashkanov, M.; Battaglieri, M.; Bedlinskiy, I.; Benkel, B.; Benmokhtar, F.; Bianconi, A.; Biselli, A.S.; Bondi, M.; Booth, W.A.; Bossù, F.; Boiarinov, S.; Brinkmann, K.-Th.; Briscoe, W.J.; Bueltmann, S.; Bulumulla, D.; Burkert, V.D.; Carman, D.S.; Celentano, A.; Chatagnon, P.; Chesnokov, V.; Chetry, T.; Ciullo, G.; Clash, G.; Cole, P.L.; Contalbrigo, M.; Costantini, G.; D'Angelo, A.; Dashyan, N.; De Vita, R.; Defurne, M.; Deur, A.; Djalali, C.; Dupre, R.; Egiyan, H.; Ehrhart, M.; El Alaoui, A.; El Fassi, L.; Elouadrhiri, L.; Fegan, S.; Filippi, A.; Gavalian, G.; Ghandilyan, Y.; Gilfoyle, G.P.; Glazier, D.I.; Golubenko, A.A.; Gosta, G.; Gothe, R.W.; Gotra, Y.; Griffioen, K.A.; Guidal, M.; Hafidi, K.; Hakobyan, H.; Hattawy, M.; Hayward, T.B.; Heddle, D.; Hobart, A.; Holtrop, M.; Ilieva, Y.; Ireland, D.G.; Isupov, E.L.; Jo, H.S.; Khachatryan, M.; Khanal, A.; Kim, W.; Kripko, A.; Kubarovsky, V.; Lagerquist, V.; Laget, J.-M.; Lanza, L.; Leali, M.; Lee, S.; Lenisa, P.; Li, X.; Livingston, K.; .J .D. MacGregor, I.; Marchand, D.; Mascagna, V.; McKinnon, B.; Meziani, Z.E.; Migliorati, S.; Mineeva, T.; Mirazita, M.; Mokeev, V.; Molina, E.; Montgomery, R.A.; Munoz Camacho, C.; Nadel-Turonski, P.; Naidoo, P.; Neupane, K.; Niccolai, S.; Nicol, M.; Niculescu, G.; Osipenko, M.; Ouillon, M.; Pandey, P.; Paolone, M.; Pappalardo, L.L.; Paremuzyan, R.; Pasyuk, E.; Paul, S.J.; Phelps, W.; Pilleux, N.; Pokhrel, M.; Poudel, J.; Price, J.W.; Prok, Y.; Reed, T.; Richards, J.; Ripani, M.; Ritman, J.; Rossi, P.; Sabatié, F.; Salgado, C.; Schadmand, S.; Schmidt, A.; Sharabian, Y.; Shirokov, E.V.; Shrestha, U.; Simmerling, P.; Sokhan, D.; Sparveris, N.; Spreafico, M.; Stepanyan, S.; Strakovsky, I.I.; Strauch, S.; Tan, J.A.; Trotta, N.; Turisini, M.; Tyson, R.; Ungaro, M.; Vallarino, S.; Venturelli, L.; Voskanyan, H.; Voutier, E.; Watts, D.P.; Wei, X.; Williams, R.; Wishart, R.; Wood, M.H.; Zachariou, N.; Zhang, J.; Zhao, Z.W.; Zurek, M.

doi:10.1016/j.physletb.2023.137761

We report measurements of the absolute energies of the hyperfine components of the $$12s \ ^2S_{1/2}$$ and $$13s \ ^2S_{1/2}$$ levels of atomic cesium, $$^{133}$$Cs. Using the frequency difference between these components, we determine the hyperfine coupling constants for these states, and report these values with a relative uncertainty of $$\sim$$0.06\%. We also examine the hyperfine structure of the $$11d \ ^2D_{J}$$ ($J=3/2, 5/2$) states, and resolve the sign ambiguity of the hyperfine coupling constants from previous measurements of these states. We also derive new, high precision values for the state energies of the $$12s \ ^2S_{1/2}$$, $$13s \ ^2S_{1/2}$$ and $$11d \ ^2D_{J}$$ states of cesium.

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