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Title: Experimental study of the A ( e , e ' π + ) reaction on H 1 , H 2 , C 12 , Al 27 , Cu 63 , and Au 197

Abstract

Cross sections for the p($$e,e'\pi^{+}$$)n process on $^1$H, $^2$H, $$^{12}$$C, $$^{27}$$Al, $$^{63}$$Cu and $$^{197}$$Au targets were measured at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) in order to extract the nuclear transparencies. Data were taken for four-momentum transfers ranging from $Q^2$=1.1 to 4.8 GeV$^2$ for a fixed center of mass energy of $W$=2.14 GeV. The ratio of $$\sigma_L$$ and $$\sigma_T$$ was extracted from the measured cross sections for $^1$H, $^2$H, $$^{12}$$C and $$^{63}$$Cu targets at $Q^2$ = 2.15 and 4.0 GeV$^2$ allowing for additional studies of the reaction mechanism. The experimental setup and the analysis of the data are described in detail including systematic studies needed to obtain the results. The results for the nuclear transparency and the differential cross sections as a function of the pion momentum at the different values of $Q^2$ are presented. Global features of the data are discussed and the data are compared with the results of model calculations for the p($$e,e'\pi^{+}$$)n reaction from nuclear targets.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
980898
Report Number(s):
JLAB-PHY-09-1048; DOE/OR/23177-0953
Journal ID: ISSN 0556-2813; PRVCAN; JLAB-EXP-01-107; TRN: US1003963
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 5; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 74 ATOMIC AND MOLECULAR PHYSICS; CEBAF ACCELERATOR; CROSS SECTIONS; DATA; DIFFERENTIAL CROSS SECTIONS; ENERGY; FOUR MOMENTUM TRANSFER; FUNCTIONS; MASS; OPACITY; ORDERS; PIONS; REACTION KINETICS; TARGETS

Citation Formats

Qian, X., Horn, T., Clasie, B., Arrington, J., Asaturyan, R., Benmokhtar, F., Boeglin, W., Bosted, P., Bruell, A., Christy, M. E., Chudakov, E., Dalton, M. M., Daniel, A., Day, D., Dutta, D., El Fassi, L., Ent, R., Fenker, H. C., Ferrer, J., Fomin, N., Gao, H., Garrow, K., Gaskell, D., Gray, C., Huber, G. M., Jones, M. K., Kalantarians, N., Keppel, C. E., Kramer, K., Li, Y., Liang, Y., Lung, A. F., Malace, S., Markowitz, P., Matsumura, A., Meekins, D. G., Mertens, T., Miyoshi, T., Mkrtchyan, H., Monson, R., Navasardyan, T., Niculescu, G., Niculescu, I., Okayasu, Y., Opper, A. K., Perdrisat, C., Punjabi, V., Rauf, A. W., Rodriquez, V. M., Rohe, D., Seely, J., Segbefia, E., Smith, G. R., Sumihama, M., Tadevosyan, V., Tang, L., Villano, A., Vulcan, W. F., Wesselmann, F. R., Wood, S. A., Yuan, L., and Zheng, X. Experimental study of the A ( e , e'π+ ) reaction on H1 , H2 , C12 , Al27 , Cu63 , and Au197. United States: N. p., 2010. Web. doi:10.1103/PhysRevC.81.055209.
Qian, X., Horn, T., Clasie, B., Arrington, J., Asaturyan, R., Benmokhtar, F., Boeglin, W., Bosted, P., Bruell, A., Christy, M. E., Chudakov, E., Dalton, M. M., Daniel, A., Day, D., Dutta, D., El Fassi, L., Ent, R., Fenker, H. C., Ferrer, J., Fomin, N., Gao, H., Garrow, K., Gaskell, D., Gray, C., Huber, G. M., Jones, M. K., Kalantarians, N., Keppel, C. E., Kramer, K., Li, Y., Liang, Y., Lung, A. F., Malace, S., Markowitz, P., Matsumura, A., Meekins, D. G., Mertens, T., Miyoshi, T., Mkrtchyan, H., Monson, R., Navasardyan, T., Niculescu, G., Niculescu, I., Okayasu, Y., Opper, A. K., Perdrisat, C., Punjabi, V., Rauf, A. W., Rodriquez, V. M., Rohe, D., Seely, J., Segbefia, E., Smith, G. R., Sumihama, M., Tadevosyan, V., Tang, L., Villano, A., Vulcan, W. F., Wesselmann, F. R., Wood, S. A., Yuan, L., & Zheng, X. Experimental study of the A ( e , e'π+ ) reaction on H1 , H2 , C12 , Al27 , Cu63 , and Au197. United States. doi:10.1103/PhysRevC.81.055209.
Qian, X., Horn, T., Clasie, B., Arrington, J., Asaturyan, R., Benmokhtar, F., Boeglin, W., Bosted, P., Bruell, A., Christy, M. E., Chudakov, E., Dalton, M. M., Daniel, A., Day, D., Dutta, D., El Fassi, L., Ent, R., Fenker, H. C., Ferrer, J., Fomin, N., Gao, H., Garrow, K., Gaskell, D., Gray, C., Huber, G. M., Jones, M. K., Kalantarians, N., Keppel, C. E., Kramer, K., Li, Y., Liang, Y., Lung, A. F., Malace, S., Markowitz, P., Matsumura, A., Meekins, D. G., Mertens, T., Miyoshi, T., Mkrtchyan, H., Monson, R., Navasardyan, T., Niculescu, G., Niculescu, I., Okayasu, Y., Opper, A. K., Perdrisat, C., Punjabi, V., Rauf, A. W., Rodriquez, V. M., Rohe, D., Seely, J., Segbefia, E., Smith, G. R., Sumihama, M., Tadevosyan, V., Tang, L., Villano, A., Vulcan, W. F., Wesselmann, F. R., Wood, S. A., Yuan, L., and Zheng, X. Sat . "Experimental study of the A ( e , e'π+ ) reaction on H1 , H2 , C12 , Al27 , Cu63 , and Au197". United States. doi:10.1103/PhysRevC.81.055209. https://www.osti.gov/servlets/purl/980898.
@article{osti_980898,
title = {Experimental study of the A ( e , e'π+ ) reaction on H1 , H2 , C12 , Al27 , Cu63 , and Au197},
author = {Qian, X. and Horn, T. and Clasie, B. and Arrington, J. and Asaturyan, R. and Benmokhtar, F. and Boeglin, W. and Bosted, P. and Bruell, A. and Christy, M. E. and Chudakov, E. and Dalton, M. M. and Daniel, A. and Day, D. and Dutta, D. and El Fassi, L. and Ent, R. and Fenker, H. C. and Ferrer, J. and Fomin, N. and Gao, H. and Garrow, K. and Gaskell, D. and Gray, C. and Huber, G. M. and Jones, M. K. and Kalantarians, N. and Keppel, C. E. and Kramer, K. and Li, Y. and Liang, Y. and Lung, A. F. and Malace, S. and Markowitz, P. and Matsumura, A. and Meekins, D. G. and Mertens, T. and Miyoshi, T. and Mkrtchyan, H. and Monson, R. and Navasardyan, T. and Niculescu, G. and Niculescu, I. and Okayasu, Y. and Opper, A. K. and Perdrisat, C. and Punjabi, V. and Rauf, A. W. and Rodriquez, V. M. and Rohe, D. and Seely, J. and Segbefia, E. and Smith, G. R. and Sumihama, M. and Tadevosyan, V. and Tang, L. and Villano, A. and Vulcan, W. F. and Wesselmann, F. R. and Wood, S. A. and Yuan, L. and Zheng, X.},
abstractNote = {Cross sections for the p($e,e'\pi^{+}$)n process on $^1$H, $^2$H, $^{12}$C, $^{27}$Al, $^{63}$Cu and $^{197}$Au targets were measured at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) in order to extract the nuclear transparencies. Data were taken for four-momentum transfers ranging from $Q^2$=1.1 to 4.8 GeV$^2$ for a fixed center of mass energy of $W$=2.14 GeV. The ratio of $\sigma_L$ and $\sigma_T$ was extracted from the measured cross sections for $^1$H, $^2$H, $^{12}$C and $^{63}$Cu targets at $Q^2$ = 2.15 and 4.0 GeV$^2$ allowing for additional studies of the reaction mechanism. The experimental setup and the analysis of the data are described in detail including systematic studies needed to obtain the results. The results for the nuclear transparency and the differential cross sections as a function of the pion momentum at the different values of $Q^2$ are presented. Global features of the data are discussed and the data are compared with the results of model calculations for the p($e,e'\pi^{+}$)n reaction from nuclear targets.},
doi = {10.1103/PhysRevC.81.055209},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 81,
place = {United States},
year = {2010},
month = {5}
}

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