Exclusive electroproduction of phi mesons at 4.2 GeV

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We studied the exclusive reaction ep {yields} e{prime}p{prime}{phi} using the {phi} {yields} K{sup +} K{sup -} decay mode. The data were collected using a 4.2 GeV incident electron beam and the CLAS detector at Jefferson Lab. Our experiment covers the range in Q{sup 2} from 0.7 to 2.2 GeV{sup 2}, and W from 2.0 to 2.6 GeV. Taken together with all previous data, we find a consistent picture of {phi} production on the proton. Our measurement shows the expected decrease of the t-slope with the vector meson formation time c{Delta}{tau} below 2 fm. At c{Delta}{tau}= 0.6 fm, we measure b{sub ... continued below

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1400 KILOBYTES pages

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Lukashin, K.; E.S., Smith. & others], CLAS Collaboration January 1, 2001.

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We studied the exclusive reaction ep {yields} e{prime}p{prime}{phi} using the {phi} {yields} K{sup +} K{sup -} decay mode. The data were collected using a 4.2 GeV incident electron beam and the CLAS detector at Jefferson Lab. Our experiment covers the range in Q{sup 2} from 0.7 to 2.2 GeV{sup 2}, and W from 2.0 to 2.6 GeV. Taken together with all previous data, we find a consistent picture of {phi} production on the proton. Our measurement shows the expected decrease of the t-slope with the vector meson formation time c{Delta}{tau} below 2 fm. At c{Delta}{tau}= 0.6 fm, we measure b{sub {phi}} = 2.27 {+-} 0.42 GeV{sup -2}. The cross section dependence on W as W{sup 0.2{+-}0.1} at Q{sup 2} = 1.3 GeV{sup 2} was determined by comparison with {phi} production at HERA after correcting for threshold effects. This is the same dependence as observed in photoproduction.

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1400 KILOBYTES pages

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  • Journal Name: Phys Rev; Journal Volume: C; Journal Issue: 63; Other Information: Submitted to Phys Rev C, 63; PBD: 1 Jan 2001

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  • Report No.: JLAB-PHY-01-02
  • Report No.: DOE/ER/40150-1801
  • Report No.: hep-ex/0101030
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 773372
  • Archival Resource Key: ark:/67531/metadc715160

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  • January 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 9:29 p.m.

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Lukashin, K.; E.S., Smith. & others], CLAS Collaboration. Exclusive electroproduction of phi mesons at 4.2 GeV, article, January 1, 2001; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc715160/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.