排序方式： 共有61条查询结果，搜索用时 0 毫秒
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Clasie B Qian X Arrington J Asaturyan R Benmokhtar F Boeglin W Bosted P Bruell A Christy ME Chudakov E Cosyn W Dalton MM Daniel A Day D Dutta D El Fassi L Ent R Fenker HC Ferrer J Fomin N Gao H Garrow K Gaskell D Gray C Horn T Huber GM Jones MK Kalantarians N Keppel CE Kramer K Larson A Li Y Liang Y Lung AF Malace S Markowitz P Matsumura A Meekins DG Mertens T Miller GA Miyoshi T Mkrtchyan H Monson R Navasardyan T Niculescu G Niculescu I Okayasu Y Opper AK Perdrisat C Punjabi V Rauf AW 《Physical review letters》2007,99(24):242502
We have measured the nuclear transparency of the A(e,e'pi+) process in 2H, 12C, 27Al, 63Cu, and 197Au targets. These measurements were performed at the Jefferson Laboratory over a four momentum transfer squared range Q2=1.1 to 4.7 (GeV/c)2. The nuclear transparency was extracted as the super-ratio of (sigmaA/sigmaH) from data to a model of pion-electroproduction from nuclei without pi-N final-state interactions. The Q2 and atomic number dependence of the nuclear transparency both show deviations from traditional nuclear physics expectations and are consistent with calculations that include the quantum chromodynamical phenomenon of color transparency. 相似文献
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Huang J Allada K Dutta C Katich J Qian X Wang Y Zhang Y Aniol K Annand JR Averett T Benmokhtar F Bertozzi W Bradshaw PC Bosted P Camsonne A Canan M Cates GD Chen C Chen JP Chen W Chirapatpimol K Chudakov E Cisbani E Cornejo JC Cusanno F Dalton MM Deconinck W de Jager CW De Leo R Deng X Deur A Ding H Dolph PA Dutta D El Fassi L Frullani S Gao H Garibaldi F Gaskell D Gilad S Gilman R Glamazdin O Golge S Guo L Hamilton D Hansen O Higinbotham DW Holmstrom T Huang M Ibrahim HF Iodice M Jiang X Jin G 《Physical review letters》2012,108(5):052001
We report the first measurement of the double-spin asymmetry A{LT} for charged pion electroproduction in semi-inclusive deep-inelastic electron scattering on a transversely polarized {3}He target. The kinematics focused on the valence quark region, 0.16相似文献
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Fomin N Arrington J Day DB Gaskell D Daniel A Seely J Asaturyan R Benmokhtar F Boeglin W Boillat B Bosted P Bruell A Bukhari MH Christy ME Chudakov E Clasie B Connell SH Dalton MM Dutta D Ent R El Fassi L Fenker H Filippone BW Garrow K Hill C Holt RJ Horn T Jones MK Jourdan J Kalantarians N Keppel CE Kiselev D Kotulla M Lindgren R Lung AF Malace S Markowitz P McKee P Meekins DG Miyoshi T Mkrtchyan H Navasardyan T Niculescu G Okayasu Y Opper AK Perdrisat C Potterveld DH Punjabi V Qian X 《Physical review letters》2010,105(21):212502
We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for x>1, which is sensitive to short-range contributions to the nuclear wave function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the "superfast" quarks probed at x>1. The falloff at x>1 is noticeably stronger in 2H and 3He, but nearly identical for all heavier nuclei. 相似文献
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Dasu S de Barbaro P Bodek A Harada H Krasny MW Lang K Riordan EM Arnold R Benton D Bosted P Clogher L deChambrier G Lung A Rock SE Szalata ZM Walker RC Filippone BW Jourdan J Milner R McKeown R Potterveld D Para A Dietrich F Van Bibber K Button-Shafer J Debebe B Hicks RS Gearhart R Whitlow LW Alster J 《Physical review letters》1988,61(9):1061-1064
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Walker RC Filippone BW Jourdan J Milner R McKeown R Potterveld D Andivahis L Arnold R Benton D Bosted P deChambrier G Lung A Rock SE Szalata ZM Para A Dietrich F Van Bibber K Button-Shafer J Debebe B Hicks RS Dasu S de Barbaro P Bodek A Harada H Krasny MW Lang K Riordan EM Gearhart R Whitlow LW Alster J 《Physical review D: Particles and fields》1994,49(11):5671-5689
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Danagoulian A Mamyan VH Roedelbronn M Aniol KA Annand JR Bertin PY Bimbot L Bosted P Calarco JR Camsonne A Chang CC Chang TH Chen JP Choi S Chudakov E Degtyarenko P de Jager CW Deur A Dutta D Egiyan K Gao H Garibaldi F Gayou O Gilman R Glamazdin A Glashausser C Gomez J Hamilton DJ Hansen JO Hayes D Higinbotham DW Hinton W Horn T Howell C Hunyady T Hyde CE Jiang X Jones MK Khandaker M Ketikyan A Kubarovsky V Kramer K Kumbartzki G Laveissière G Lerose J Lindgren RA Margaziotis DJ Markowitz P 《Physical review letters》2007,98(15):152001
Cross-section values for Compton scattering on the proton were measured at 25 kinematic settings over the range s=5-11 and -t=2-7 GeV2 with a statistical accuracy of a few percent. The scaling power for the s dependence of the cross section at fixed center-of-mass angle was found to be 8.0+/-0.2, strongly inconsistent with the prediction of perturbative QCD. The observed cross-section values are in fair agreement with the calculations using the handbag mechanism, in which the external photons couple to a single quark. 相似文献