Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au]
Cross sections for the 1H(e,e′π+)n [superscript 1 H (e, e prime pi superscript +) n] process on 1H [superscript 1 H], 2H [superscript 2 H], 12C [superscript 12 C], 27Al [superscript 27 Al], 63Cu [superscript 63 Cu], and 197Au [superscript 197 Au] targets were measured at the Thomas Jefferson Nationa...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2011
|
| Online Access: | http://hdl.handle.net/1721.1/65128 |
| _version_ | 1811088796671803392 |
|---|---|
| author | Clasie, Benjamin Michael Patrick Seely, Jason |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Clasie, Benjamin Michael Patrick Seely, Jason |
| author_sort | Clasie, Benjamin Michael Patrick |
| collection | MIT |
| description | Cross sections for the 1H(e,e′π+)n [superscript 1 H (e, e prime pi superscript +) n] process on 1H [superscript 1 H], 2H [superscript 2 H], 12C [superscript 12 C], 27Al [superscript 27 Al], 63Cu [superscript 63 Cu], and 197Au [superscript 197 Au] targets were measured at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) to extract nuclear transparencies. Data were taken from Q2=1.1–4.7 [Q superscript 2 = 1.1-4.7] GeV2 [Ge V superscript 2] for a fixed center-of-mass energy of W=2.14 GeV. The ratio of σL [delta subscript L] and σT [delta subscript T] was extracted from the measured cross sections for 1H [superscript 1 H], 2H [superscript 2 H], 12C [superscript 12 C], and 63Cu [superscript 63 Cu] targets at Q2=2.15 [Q swuperscript 2 = 2.15] and 4.0 GeV2 [Ge V superscript 2], allowing for additional studies of the reaction mechanism. In this article, we present the experimental setup and the analysis of the data in detail, including systematic uncertainty studies. Differential cross sections and nuclear transparencies as a function of the pion momentum at different values of Q2 [Q superscript 2] are presented. Our results are consistent with the predicted early onset of color transparency in mesons. Global features of the data are discussed and the data are compared with model calculations for the 1H(e,e′π+)n [superscript 1 H (e, e prime pi superscript +) n] reaction from nuclear targets. |
| first_indexed | 2024-09-23T14:07:41Z |
| format | Article |
| id | mit-1721.1/65128 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:07:41Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/651282022-10-01T19:22:41Z Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] Clasie, Benjamin Michael Patrick Seely, Jason Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Clasie, Benjamin Michael Patric Clasie, Benjamin Michael Patrick Seely, Jason Cross sections for the 1H(e,e′π+)n [superscript 1 H (e, e prime pi superscript +) n] process on 1H [superscript 1 H], 2H [superscript 2 H], 12C [superscript 12 C], 27Al [superscript 27 Al], 63Cu [superscript 63 Cu], and 197Au [superscript 197 Au] targets were measured at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) to extract nuclear transparencies. Data were taken from Q2=1.1–4.7 [Q superscript 2 = 1.1-4.7] GeV2 [Ge V superscript 2] for a fixed center-of-mass energy of W=2.14 GeV. The ratio of σL [delta subscript L] and σT [delta subscript T] was extracted from the measured cross sections for 1H [superscript 1 H], 2H [superscript 2 H], 12C [superscript 12 C], and 63Cu [superscript 63 Cu] targets at Q2=2.15 [Q swuperscript 2 = 2.15] and 4.0 GeV2 [Ge V superscript 2], allowing for additional studies of the reaction mechanism. In this article, we present the experimental setup and the analysis of the data in detail, including systematic uncertainty studies. Differential cross sections and nuclear transparencies as a function of the pion momentum at different values of Q2 [Q superscript 2] are presented. Our results are consistent with the predicted early onset of color transparency in mesons. Global features of the data are discussed and the data are compared with model calculations for the 1H(e,e′π+)n [superscript 1 H (e, e prime pi superscript +) n] reaction from nuclear targets. United States. Dept. of Energy National Science Foundation (U.S.) Natural Sciences and Engineering Research Council of Canada (NSERC) 2011-08-12T19:18:21Z 2011-08-12T19:18:21Z 2010-05 2010-04 Article http://purl.org/eprint/type/JournalArticle 0556-2813 http://hdl.handle.net/1721.1/65128 Qian, X. et al. “Experimental Study of the A(e,e^{′}π^{+}) Reaction on ^{1}H, ^{2}H, ^{12}C, ^{27}Al, ^{63}Cu, and ^{197}Au.” Physical Review C 81.5 (2010) : n. pag. © 2010 The American Physical Society en_US http://dx.doi.org/10.1103/PhysRevC.81.055209 Physical review C Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Clasie, Benjamin Michael Patrick Seely, Jason Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] |
| title | Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] |
| title_full | Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] |
| title_fullStr | Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] |
| title_full_unstemmed | Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] |
| title_short | Experimental study of the A(e,e 'pi(+)) [A (e, e prime pi superscript +)] reaction on H-1 [superscript 1 H], H-2 [superscript 2 H], C-12 [superscript 12 C], Al-27 [superscript 27 Al], Cu-63 [superscript 63 Cu], and Au-197 [superscript 197 Au] |
| title_sort | experimental study of the a e e pi a e e prime pi superscript reaction on h 1 superscript 1 h h 2 superscript 2 h c 12 superscript 12 c al 27 superscript 27 al cu 63 superscript 63 cu and au 197 superscript 197 au |
| url | http://hdl.handle.net/1721.1/65128 |
| work_keys_str_mv | AT clasiebenjaminmichaelpatrick experimentalstudyoftheaeepiaeeprimepisuperscriptreactiononh1superscript1hh2superscript2hc12superscript12cal27superscript27alcu63superscript63cuandau197superscript197au AT seelyjason experimentalstudyoftheaeepiaeeprimepisuperscriptreactiononh1superscript1hh2superscript2hc12superscript12cal27superscript27alcu63superscript63cuandau197superscript197au |