Experimental study of the A ( e , e'π+ ) reaction on H1 , H2 , C12 , Al27 , Cu63 , and Au197

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.

doi:10.1103/PhysRevC.81.055209

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

Journal Article · Sat May 01 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.81.055209· OSTI ID:980898

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. more »

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.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

DOE Contract Number:: AC05-06OR23177

OSTI ID:: 980898

Report Number(s):: JLAB-PHY-09-1048; DOE/OR/23177-0953; PRVCAN; JLAB-EXP-01-107; TRN: US1003963

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 81, Issue 5; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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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

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