Coherent photoproduction of π+ [pi superscript +] from 3He [superscript 3 He]

Nasseripour, R.; Berman, B.L.; Adhikari, K.P.; Adikaram, D.; Anghinolfi, M.; Ball, J.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A.S.; Branford, D.; Briscoe, W.J.; Brooks, W.K.; Burkert, V.D.; Carman, D.S.; Casey, L.; Cole, P.L.; Collins, P.; Crede, V.; D’Angelo, A.; Daniel, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Deur, A.; Dey, B.; Dickson, R.; Djalali, C.; Doughty, D.; Dupre, R.; Egiyan, H.; El Alaoui, A.; El Fassi, L.; Fegan, S.; Fradi, A.; Gabrielyan, M.Y.; Gilfoyle, G.P.; Giovanetti, K.L.; Girod, F.X.; Goetz, J.T.; Gohn, W.; Gothe, R.W.; Graham, L.; Griffioen, K.A.; Guegan, B.; Hafidi, K.; Hakobyan, H.; Hanretty, C.; Heddle, D.; Holtrop, M.; Hyde, C.E.; Ilieva, Y.; Ireland, D.G.; Isupov, E.L.; Keller, D.; Khandaker, M.; Khetarpal, P.; Kim, A.; Kim, W.; Klein, A.; Klein, F.J.; Konczykowski, P.; Kubarovsky, V.; Kuhn, S.E.; Kuleshov, S.V.; Kuznetsov, V.; Kvaltine, N.D.; Livingston, K.; Lu, H.Y.; MacGregor, I.J.D.; Mayer, M.; McAndrew, J.; McKinnon, B.; Micherdzinska, A.M.; Mirazita, M.; Moriya, K.; Moreno, B.; Morrison, B.; Moutarde, H.; Munevar, E.; Nadel-Turonski, P.; Ni, A.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Osipenko, M.; Ostrovidov, A.I.; Paolone, M.; Paremuzyan, R.; Park, K.; Park, S.; Pasyuk, E.; Pereira, S.; Perrin, Y.; Pisano, S.; Pozdniakov, S.; Price, J.W.; Procureur, S.; Protopopescu, D.; Ripani, M.; Ritchie, B.G.; Rosner, G.; Rossi, P.; Sabatié, F.; Saini, M.S.; Salgado, C.; Schott, D.; Schumacher, R.A.; Seraydaryan, H.; Sharabian, Y.G.; Smith, E.S.; Smith, G.D.; Sober, D.I.; Sokhan, D.; Stepanyan, S.S.; Stepanyan, S.; Stoler, P.; Strauch, S.; Suleiman, R.; Taiuti, M.; Tang, W.; Taylor, C.E.; Tedeschi, D.J.; Tkachenko, S.; Ungaro, M.; Vernarsky, B.; Vineyard, M.F.; Voutier, E.; Watts, D.P.; Weinstein, L.B.; Weygand, D.P.; Wood, M.H.; Zhao, B.; Zhao, Z.W.

Author(s)

Suleiman, R.

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Abstract

We have measured the differential cross section for the γ3He→π+t [y superscript 3 He → pi superscript + t] reaction. This reaction was studied using the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons produced with the Hall-B bremsstrahlung tagging system in the energy range from 0.50 to 1.55 GeV were incident on a cryogenic liquid 3He [superscript 3 He] target. The differential cross sections for the γ3He→π+t [y superscript 3 He → pi superscript + t] reaction were measured as a function of photon-beam energy and pion-scattering angle. Theoretical predictions to date cannot explain the large cross sections except at backward angles, showing that additional components must be added to the model.

Date issued

2011-03

URI

http://hdl.handle.net/1721.1/65902

Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

Physical review C

Publisher

American Physical Society

Citation

Version: Final published version

ISSN

0556-2813

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