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Recoil polarization for delta excitation in pion electroproduction. PHYSICAL REVIEW LETTERS 2005; 95:102001. [PMID: 16196919 DOI: 10.1103/physrevlett.95.102001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Indexed: 05/04/2023]
Abstract
We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W = 1.23 GeV at Q(2) = 1.0 (GeV/c)(2), obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re (S(1+)/M(1+)) = -(6.84 +/- 0.15)% and Re (E(1+)/M(1+)) = -(2.91 +/- 0.19)% that are distinctly different from those from the traditional Legendre analysis based upon M1+ dominance and ll(pi) < or = 1 truncation.
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Measurement of the high energy two-body deuteron photodisintegration differential cross section. PHYSICAL REVIEW LETTERS 2001; 87:102302. [PMID: 11531475 DOI: 10.1103/physrevlett.87.102302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2001] [Indexed: 05/23/2023]
Abstract
The first measurements of the d(gamma,p)n differential cross section at forward angles and photon energies above 4 GeV were performed at the Thomas Jefferson National Accelerator Facility (JLab). The results indicate evidence of an angular dependent scaling threshold. Results at straight theta(cm) = 37 degrees are consistent with the constituent counting rules for E(gamma) greater, similar 4 GeV, while those at 70 degrees are consistent with the constituent counting rules for E(gamma) greater, similar 1.5 GeV.
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Measurement of tensor polarization in elastic electron-deuteron scattering at large momentum transfer. PHYSICAL REVIEW LETTERS 2000; 84:5053-5057. [PMID: 10990865 DOI: 10.1103/physrevlett.84.5053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2000] [Indexed: 05/23/2023]
Abstract
Tensor polarization observables ( t(20), t(21), and t(22)) have been measured in elastic electron-deuteron scattering for six values of momentum transfer between 0.66 and 1.7 (GeV/c)(2). The experiment was performed at the Jefferson Laboratory in Hall C using the electron High Momentum Spectrometer, a specially designed deuteron magnetic channel and the recoil deuteron polarimeter POLDER. The new data determine to much larger Q2 the deuteron charge form factors G(C) and G(Q). They are in good agreement with relativistic calculations and disagree with perturbative QCD predictions.
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Analyzing powers for 1H. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:1005-1008. [PMID: 9971022 DOI: 10.1103/physrevc.53.1005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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6
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Photopion production from polarized nuclear targets. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 52:2591-2600. [PMID: 9970789 DOI: 10.1103/physrevc.52.2591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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7
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Analyzing powers for the 2H(p. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 52:2552-2558. [PMID: 9970786 DOI: 10.1103/physrevc.52.2552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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8
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Distorted-wave impulse approximation calculations of proton polarization following pi + absorption in nuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1995; 51:776-783. [PMID: 9970121 DOI: 10.1103/physrevc.51.776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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9
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Energy dependence of two-nucleon pion absorption on 16O. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 47:1184-1199. [PMID: 9968551 DOI: 10.1103/physrevc.47.1184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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10
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N* electroproduction and propagation in nuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1993; 47:225-230. [PMID: 9968429 DOI: 10.1103/physrevc.47.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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11
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Pion absorption on polarized nuclear targets. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1992; 46:2415-2429. [PMID: 9968374 DOI: 10.1103/physrevc.46.2415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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12
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Dominance of the two-nucleon mechanism in 16O( pi +,pp) at 115 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1992; 45:1767-1783. [PMID: 9967930 DOI: 10.1103/physrevc.45.1767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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13
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Proton propagation in nuclei studied in the (e,e'p) reaction. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1992; 45:780-790. [PMID: 9967815 DOI: 10.1103/physrevc.45.780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Reaction 58Ni( pi +,pp) at T pi +=160 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 41:2215-2228. [PMID: 9966584 DOI: 10.1103/physrevc.41.2215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16O( pi +,2p) reaction at 165 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1990; 41:409-413. [PMID: 9966373 DOI: 10.1103/physrevc.41.r409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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(p,p alpha ) cluster-knockout reaction on 9Be at 200 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1989; 40:1130-1135. [PMID: 9966087 DOI: 10.1103/physrevc.40.1130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Proton propagation in nuclei studied in the A dependence of the (e,e'p) reaction in the quasifree region. PHYSICAL REVIEW LETTERS 1989; 63:734-737. [PMID: 10041164 DOI: 10.1103/physrevlett.63.734] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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18
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J dependence in the reaction 16O( pi +,2p)14N at 116 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1989; 39:957-964. [PMID: 9955286 DOI: 10.1103/physrevc.39.957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Exclusive quasi-deuteron absorption of pions in 16O and 18O at 116 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1988; 38:2205-2220. [PMID: 9955045 DOI: 10.1103/physrevc.38.2205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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20
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Pion-induced nucleon knockout from polarized nuclei. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1988; 38:787-794. [PMID: 9954869 DOI: 10.1103/physrevc.38.787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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( pi,p) reactions at low excitation energy. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1987; 35:1567-1569. [PMID: 9953934 DOI: 10.1103/physrevc.35.1567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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22
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16O( alpha, alpha p) and 40Ca( alpha, alpha p) reactions at 139.2 MeV incident energy. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1987; 35:333-335. [PMID: 9953767 DOI: 10.1103/physrevc.35.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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23
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Tests of the factorized distorted wave impulse approximation for (p,2p) reactions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1986; 34:1610-1619. [PMID: 9953630 DOI: 10.1103/physrevc.34.1610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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2H, 3,4He(p. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1985; 32:1474-1487. [PMID: 9953003 DOI: 10.1103/physrevc.32.1474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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26
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Isospin effect in pi * 14C elastic scattering at 50 MeV. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1985; 32:995-998. [PMID: 9952928 DOI: 10.1103/physrevc.32.995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Reply to "Role of pion absorption on quasi-deuterons in sup12C( pi sup+,2p)". PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1985; 32:334. [PMID: 9952840 DOI: 10.1103/physrevc.32.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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9Be(p,p alpha ) 5He cluster knockout reaction with 150 MeV polarized protons. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1985; 31:1662-1672. [PMID: 9952703 DOI: 10.1103/physrevc.31.1662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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