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Polarization measurements in high-energy deuteron photodisintegration | | K Wijesooriya
; A Afanasev
; M Amarian
; K Aniol
; S Becher
; K Benslama
; L Bimbot
; P Bosted
; E Brash
; J Calarco
; Z Chai
; C C Chang
; T Chang
; J P Chen
; S Choi
; E Chudakov
; S Churchwell
; D Crovelli
; S Dieterich
; S Dumalski
; D Dutta
; M Epstein
; K Fissum
; B Fox
; S Frullani
; H Gao
; J Gao
; F Garibaldi
; O Gayou
; R Gilman
; S Glamazdin
; C Glashausser
; J Gomez
; V Gorbenko
; O Hansen
; R J Holt
; J Hovdebo
; G M Huber
; C W de Jager
; X Jiang
; C Jones
; M K Jones
; J Kelly
; E Kinney
; E Kooijman
; G Kumbartzki
; M Kuss
; J LeRose
; M Liang
; R Lindgren
; N Liyanage
; S Malov
; D J Margaziotis
; P Markowitz
; K McCormick
; D Meekins
; Z E Meziani
; R Michaels
; J Mitchell
; L Mor
; C F Perdrisat
; R Pomatsalyuk
; V Punjabi
; R D Ransome
; R Roche
; M Rvachev
; A Saha
; A Sarty
; E C Schulte
; D Simon
; S Strauch
; R Suleiman
; L Todor
; P E Ulmer
; G M Urciuoli
; B Wojtsekhowski
; F Xiong
; W Xu
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; | | Date: |
2 Apr 2001 | | Journal: | Phys Rev Lett, 86 (14), 2975-9 | | Abstract: | We present measurements of the recoil proton polarization for the d(gamma-->,p-->)n reaction at straight theta(c.m.) = 90 degrees for photon energies up to 2.4 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. The induced polarization p(y) vanishes above 1 GeV, contrary to meson-baryon model expectations, in which resonances lead to large polarizations. However, the polarization transfer Cx does not vanish above 1 GeV, inconsistent with hadron helicity conservation. Thus, we show that the scaling behavior observed in the d(gamma,p)n cross sections is not a result of perturbative QCD. These data should provide important tests of new nonperturbative calculations in the intermediate energy regime. | | Source: | PubMed, pmid11290086 | | Services: | Forum | Review | Favorites | |
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