Measurement of the neutron F2 structure function via spectator tagging with CLAS
Abstract
We report on the first measurement of the F2 structure function of the neutron from 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 and their angles to < 100 degrees relative to the momentum transfer allows an interpretation of the process in terms of scattering from nearly on-shell neutrons. The F2n data collected cover the nucleon resonance and deep-inelastic regions over a wide range of Bjorken x for 0.65 < Q2 < 4.52 GeV2, 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 F2n/F2p at 0.2 < x < 0.8 with little uncertainty due to nuclear effects.
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Cite
@article{arxiv.1110.2770,
title = {Measurement of the neutron F2 structure function via spectator tagging with CLAS},
author = {N. Baillie and S. Tkachenko and J. Zhang and P. Bosted and S. Bultmann and M. E. Christy and H. Fenker and K. A. Griffioen and C. E. Keppel and S. E. Kuhn and W. Melnitchouk and V. Tvaskis and K. P. Adhikari and D. Adikaram and M. Aghasyan and M. J. Amaryan and M. Anghinolfini and J. Arrington and H. Avakian and H. Baghdasaryan and M. Battaglieri and A. S. Biselli and 5 D. Branford and W. J. Briscoe and W. K. Brooks and V. D. Burkert and D. S. Carman and A. Celentano and S. Chandavar and G. Charles and P. L. Cole and M. Contalbrigo and V. Crede and A. D'Angelo and A. Daniel and N. Dashyan and R. De Vita and E. De Sanctis and A. Deur and B. Dey and C. Djalali and G. Dodge and J. Domingo and D. Doughty and R. Dupre and D. Dutta and R. Ent and H. Egiyan and A. El Alaoui and L. El Fassi and L. Elouadrhiri and P. Eugenio and G. Fedotov and S. Fegan and A. Fradi and M. Y. Gabrielyan and N. Gevorgyan and G. P. Gilfoyle and K. L. Giovanetti and F. X. Girod and W. Gohn and E. Golovatch and R. W. Gothe and L. Graham and B. Guegan and M. Guidal and N. Guler and L. Guo and K. Hafidi and D. Heddle and K. Hicks and M. Holtrop and E. Hungerford and C. E. Hyde and Y. Ilieva and D. G. Ireland and M. Ispiryan and E. L. Isupov and S. S. Jawalkar and H. S. Jo and N. Kalantarians and M. Khandaker and P. Khetarpal and A. Kim and W. Kim and P. M. King and A. Klein and F. J. Klein and A. Klimenko and V. Kubarovsky and S. V. Kuleshov and N. D. Kvaltine and K. Livingston and H. Y. Lu and I . J . D. MacGregor and Y. Mao and N. Markov and B. McKinnon and T. Mineeva and B. Morrison and H. Moutarde and E. Munevar and P. Nadel-Turonski and A. Ni and S. Niccolai and I. Niculescu and G. Niculescu and M. Osipenko and A. I. Ostrovidov and L. Pappalardo and K. Park and S. Park and E. Pasyuk and S. Anefalos Pereira and S. Pisano and S. Pozdniakov and J. W. Price and S. Procureur and Y. Prok and D. Protopopescu and B. A. Raue and G. Ricco and D. Rimal and M. Ripani and G. Rosner and P. Rossi and F. Sabatie and M. S. Saini and C. Salgado and D. Schott and R. A. Schumacher and E. Seder and Y. G. Sharabian and D. I. Sober and D. Sokhan and S. Stepanyan and S. S. Stepanyan and P. Stoler and S. Strauch and M. Taiuti and W. Tang and M. Ungaro and M. F. Vineyard and E. Voutier and D. P. Watts and L. B. Weinstein and D. P. Weygand and M. H. Wood and L. Zana and B. Zhao},
journal= {arXiv preprint arXiv:1110.2770},
year = {2012}
}
Comments
6 pages, 3 pages