Photoproduction of the f_{2}(1270) Meson Using the CLAS Detector.
作者信息
Carver M, Celentano A, Hicks K, Marsicano L, Mathieu V, Pilloni A, Adhikari K P, Adhikari S, Amaryan M J, Angelini G, Atac H, Baltzell N A, Barion L, Battaglieri M, Bedlinskiy I, Benmokhtar F, 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, Alaoui A El, Fassi L El, 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, Movsisyan A, Munevar E, Camacho C Munoz, 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
机构信息
Ohio University, Athens, Ohio 45701, USA.
INFN, Sezione di Genova, 16146 Genova, Italy.
出版信息
Phys Rev Lett. 2021 Feb 26;126(8):082002. doi: 10.1103/PhysRevLett.126.082002.
The quark structure of the f_{2}(1270) meson has, for many years, been assumed to be a pure quark-antiquark (qq[over ¯]) 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 ρ mesons. Such a state would be expected to decay strongly to final states with charged pions due to the dominant decay ρ→π^{+}π^{-}, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction γp→π^{0}π^{0}p, using the CEBAF Large Acceptance Spectrometer detector at Jefferson Lab for incident beam energies between 3.6 and 5.4 GeV. Differential cross sections, dσ/dt, for f_{2}(1270) photoproduction are extracted with good precision due to low backgrounds and are compared to theoretical calculations.
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