학술논문
Photoproduction of the $f_2(1270)$ meson using the CLAS detector
Document Type
Working Paper
Author
Carver, M.; Celentano, A.; Hicks, K.; Marsicano, L.; Mathieu, V.; Pilloni, A.; Adhikari, K. P.; Adhikari, S.; Amaryan, M. J.; Angelini, Giovanni; Atac, H.; Baltzell, N. A.; Barion, L.; Battaglieri, M.; Bedlinskiy, I.; Benmokhtar, Fatiha; Bianconi, A.; Biselli, A. S.; Bondi, M.; Bossù, F.; Boiarinov, S.; Briscoe, W. J.; Brooks, W. K.; Bulumulla, D.; Burkert, V. D.; Carman, D. S.; Carvajal, J. C.; Chatagnon, P.; Chetry, T.; Ciullo, G.; Clark, L.; Clary, B. A.; Cole, P. L.; Contalbrigo, M.; Crede, V.; D'Angelo, A.; Dashyan, N.; De~Vita, R.; Defurne, M.; Deur, A.; Diehl, S.; Djalali, C.; Dugger, M.; Dupre, R.; Egiyan, H.; Ehrhart, M.; El~Alaoui, A.; El~Fassi, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Filippi, A.; Gavalian, G.; Gevorgyan, N.; Gilfoyle, G. P.; Girod, F. X.; Gothe, R. W.; Griffioen, K. A.; Hafidi, K.; Hakobyan, H.; Hattawy, M.; Hayward, T. B.; Heddle, D.; Holtrop, M.; Huang, Q.; Hyde, C. E.; Ilieva, Y.; Ireland, D. G.; Isupov, E. L.; Jenkins, D.; Jo, H. S.; Joo, K.; Joosten, S. ~; Keller, D.; Khanal, A.; Khandaker, M.; Kim, A.; Kim, C. W.; Klein, F. J.; Kripko, A.; Kubarovsky, V.; Lanza, L.; Leali, M.; Lenisa, P.; Livingston, K.; MacGregor, I. J. D.; Marchand, D.; Mascagna, V.; McCracken, M. E.; McKinnon, B.; Meziani, Z. E.; Mokeev, V.; A~Movsisyan; Munevar, E.; Munoz~Camacho, C.; Nadel-Turonski, P.; Neupane, K.; Niccolai, S.; Niculescu, G.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Pappalardo, L. L.; Paremuzyan, R.; Pasyuk, E.; Phelps, W.; Pogorelko, O.; Prok, Y.; Protopopescu, D.; Ripani, M.; Ritchie, B. G.; Ritman, J.; Rizzo, A.; Rosner, G.; Rowley, J.; Sabatié, F.; Salgado, C.; Schmidt, A.; Schumacher, R. A.; Sharabian, Y. G.; Shrestha, U.; Sokhan, D.; Soto, O.; Sparveris, N.; Stepanyan, S.; Strakovsky, I. I.; Strauch, S.; Tyler, N.; Tyson, R.; Ungaro, M.; Venturelli, L.; Voskanyan, H.; Voutier, E.; Watts, D. P.; Wei, K.; Wei, X.; Yale, B.; Zachariou, N.; Zhang, J.; Zhao, Z. W.
Source
Phys. Rev. Lett. 126, 082002 (2021)
Subject
Language
Abstract
The quark structure of the $f_2(1270)$ meson has, for many years, been assumed to be a pure quark-antiquark ($q\bar{q}$) resonance with quantum numbers $J^{PC} = 2^{++}$. Recently, it was proposed that the $f_2(1270)$ is a molecular state made from the attractive interaction of two $\rho$-mesons. Such a state would be expected to decay strongly to final states with charged pions, due to the dominant decay $\rho \to \pi^+ \pi^-$, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction $\gamma p \to \pi^0 \pi^0 p$, using the CLAS detector at Jefferson Lab for incident beam energies between 3.6-5.4~GeV. Differential cross sections, $d\sigma / dt$, for $f_2(1270)$ photoproduction are extracted with good precision, due to low backgrounds, and are compared with theoretical calculations.
Comment: 5 pages, 4 figures
Comment: 5 pages, 4 figures