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. 2012 Apr 6;108(14):142001.
doi: 10.1103/PhysRevLett.108.142001. Epub 2012 Apr 6.

Measurement of the neutron F2 structure function via spectator tagging with CLAS

N Baillie  1 , S Tkachenko, J Zhang, P Bosted, S Bültmann, M E Christy, H Fenker, K A Griffioen, C E Keppel, S E Kuhn, W Melnitchouk, V Tvaskis, K P Adhikari, D Adikaram, M Aghasyan, M J Amaryan, M Anghinolfi, J Arrington, H Avakian, H Baghdasaryan, M Battaglieri, A S Biselli, D Branford, W J Briscoe, W K Brooks, V D Burkert, D S Carman, A Celentano, S Chandavar, G Charles, P L Cole, M Contalbrigo, V Crede, A D'Angelo, A Daniel, N Dashyan, R De Vita, E De Sanctis, A Deur, B Dey, C Djalali, G Dodge, J Domingo, D Doughty, R Dupre, D Dutta, R Ent, H Egiyan, A El Alaoui, L El Fassi, L Elouadrhiri, P Eugenio, G Fedotov, S Fegan, A Fradi, M Y Gabrielyan, N Gevorgyan, G P Gilfoyle, K L Giovanetti, F X Girod, W Gohn, E Golovatch, R W Gothe, L Graham, B Guegan, M Guidal, N Guler, L Guo, K Hafidi, D Heddle, K Hicks, M Holtrop, E Hungerford, C E Hyde, Y Ilieva, D G Ireland, M Ispiryan, E L Isupov, S S Jawalkar, H S Jo, N Kalantarians, M Khandaker, P Khetarpal, A Kim, W Kim, P M King, A Klein, F J Klein, A Klimenko, V Kubarovsky, S V Kuleshov, N D Kvaltine, K Livingston, H Y Lu, I J D MacGregor, Y Mao, N Markov, B McKinnon, T Mineeva, B Morrison, H Moutarde, E Munevar, P Nadel-Turonski, A Ni, S Niccolai, I Niculescu, G Niculescu, M Osipenko, A I Ostrovidov, L Pappalardo, K Park, S Park, E Pasyuk, S Anefalos Pereira, S Pisano, S Pozdniakov, J W Price, S Procureur, Y Prok, D Protopopescu, B A Raue, G Ricco, D Rimal, M Ripani, G Rosner, P Rossi, F Sabatié, M S Saini, C Salgado, D Schott, R A Schumacher, E Seder, Y G Sharabian, D I Sober, D Sokhan, S Stepanyan, S S Stepanyan, P Stoler, S Strauch, M Taiuti, W Tang, M Ungaro, M F Vineyard, E Voutier, D P Watts, L B Weinstein, D P Weygand, M H Wood, L Zana, B Zhao; CLAS Collaboration
Affiliations

Measurement of the neutron F2 structure function via spectator tagging with CLAS

N Baillie et al. Phys Rev Lett. .

Erratum in

  • Phys Rev Lett. 2012 May 11;108(19):199902

Abstract

We report on the first measurement of the F(2) structure function of the neutron from the semi-inclusive scattering of electrons from deuterium, with low-momentum protons detected in the backward hemisphere. Restricting the momentum of the spectator protons to ≲100 MeV/c and their angles to ≳100° relative to the momentum transfer allows an interpretation of the process in terms of scattering from nearly on-shell neutrons. The F(2)(n) data collected cover the nucleon-resonance and deep-inelastic regions over a wide range of Bjorken x for 0.65<Q(2)<4.52 GeV(2), with uncertainties from nuclear corrections estimated to be less than a few percent. These measurements provide the first determination of the neutron to proton structure function ratio F(2)(n)/F(2)(p) at 0.2≲x≲0.8 with little uncertainty due to nuclear effects.

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