Measurement of transparency ratios for protons from short-range correlated pairs

Hen, O. et al. (2013) Measurement of transparency ratios for protons from short-range correlated pairs. Physics Letters B, 722(1-3), pp. 63-68. (doi: 10.1016/j.physletb.2013.04.011)

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Nuclear transparency, Tp(A), is a measure of the average probability for a struck proton to escape the nucleus without significant re-interaction. Previously, nuclear transparencies were extracted for quasi-elasticA(e,e′p) knockout of protons with momentum below the Fermi momentum, where the spectral functions are well known. In this Letter we extract a novel observable, the transparency ratio, Tp(A)/Tp(<sup>12</sup>C), for knockout of high-missing-momentum protons from the breakup of short-range correlated pairs (2N-SRC) in Al, Fe and Pb nuclei relative to C. The ratios were measured at momentum transfer andxB⩾1.2 where the reaction is expected to be dominated by electron scattering from 2N-SRC. The transparency ratios of the knocked-out protons coming from 2N-SRC breakup are 20–30% lower than those of previous results for low missing momentum. They agree with Glauber calculations and agree with renormalization of the previously published transparencies as proposed by recent theoretical investigations. The new transparencies scale as A<sup>−1/3</sup>, which is consistent with dominance of scattering from nucleons at the nuclear surface.

Item Type:Articles (Letter)
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria and Fegan, Mr Stuart and Protopopescu, Dr Dan and Smith, Mr Gary and MacGregor, Professor Douglas and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Montgomery, Dr Rachel and Ireland, Professor David and Rosner, Professor Guenther
Authors: Hen, O., Hakobyan, H., Shneor, R., Piasetzky, E., Weinstein, L.B., Brooks, W.K., Beck, S. M.-T., Gilad, S., Korover, I., Beck, A., Adhikari, K.P., Aghasyan, M., Amaryan, M.J., Pereira, S. A., Arrington, J.R., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Bono, J., Boiarinov, S., Briscoe, W.J., Burkert, V.D., Carman, D.S., Celentano, A., Chandavar, S., Cole, P.L., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dodge, G.E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Fleming, J.A., Gabrielyan, M.Y., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.S., Goetz, J.T., Gohn, W., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guo, L., Hafidi, K., Harrison, N., Heddle, D., Hicks, K., Holtrop, M., Hyde, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jo, H.S., Joo, K., Keller, D., Khandaker, M.., Khetarpal, P., Kim, A., Klein, F.J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuhn, S.E.E., Livingston, K., Lu, H.Y., MacGregor, I.J.D., Martinez, D., Mayer, M., McKinnon, B., Mineeva, T., Mokeev, V., Montgomery, R.A., Moutarde, H., Munevar, E., Munoz Camacho, C., Mustapha, B., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Pappalardo, L.L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Phelps, E.., Phillips, J.J., Pisano, S., Pivnyuk, N., Pogorelko, O., Pozdniakov, S., Price, J.W., Procureur, S., Protopopescu, D., Puckett, A.J.R., Raue, B.A., Rimal, D., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Sabatie, F., Saini, M.S., Schott, D., Schumacher, R.A., Seraydaryan, H., Sharabian, Y.G., Smith, G.D., Sober, D.I., Sokhan, D., Stepanyan, S.S., Stepanyan, S., Strauch, S., Taiuti, M., Tang, W., Taylor, C.E., Tian, Y., Tkachenko, S., Ungaro, M., Vernarsky, B., Vlassov, A., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Wood, M.H.., Zachariou, N., Zana, L., Zhang, J., Zheng, X., and Zonta, I.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:CLAS
Journal Name:Physics Letters B
Journal Abbr.:Phys. Lett. B
Publisher:Elsevier BV
ISSN (Online):1873-2445
Copyright Holders:Elsevier BV

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
570711Nuclear Physics GroupDavid IrelandScience & Technologies Facilities Council (STFC)ST/J000175/1P&A - PHYSICS & ASTRONOMY