<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>(p,2p)n at 508 MeV: Recoil momenta≤200MeV/c

Punjabi, V.; Aniol, B K. A.; Bracco, A.; Davis, C. A.; Epstein, M. B.; Gubler, H.P.; Huber, J. P.; Lee, W. P.; Margaziotis, D. J.; Perdrisat, C. F.; Poffenberger, P.; Postma, H.; Sebel, H.J.; Stetz, A.W.; Oers, W. T. H. van

doi:10.1103/physrevc.38.2728

Cited by 21 publications

(32 citation statements)

References 29 publications

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“…Though our two-body force is simple, we compare to a 2 H(p,2p)n experiment at 508 MeV [12] to see if our calculation captures essential features of the measurement. Differences in the predictions of our relativistic and nonrelativistic calculations are very pronounced at this energy as can be seen in Fig.…”

Section: Selected Resultsmentioning

confidence: 99%

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Poincaré invariant three-body scattering at intermediate energies

et al. 2008

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Abstract. Relativistic Faddeev equations for three-body scattering are solved at arbitrary energies in terms of momentum vectors without employing a partial wave decomposition. Relativistic invariance is incorporated within the framework of Poincaré invariant quantum mechanics. Based on a Malfliet-Tjon interaction, observables for elastic and breakup scattering are calculated and compared to non-relativistic ones. The convergence of the Faddeev multiple scattering series is investigated at higher energies.

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Section: Selected Resultsmentioning

confidence: 99%

“…4, which shows selected angle pairs θ 1 − θ 2 from Ref. [12], which are symmetric around the beam axis. The cross section is plotted against the laboratory kinetic energy of one of the outgoing protons.…”

Section: Selected Resultsmentioning

confidence: 99%

Poincaré invariant three-body scattering at intermediate energies

et al. 2008

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“…The exact solution to the Faddeev equation is constructed from the multiple scattering series using Padé summation. Though our two-body force is simple, we want to compare to a 2 H(p,2p)n experiment at a projectile kinetic energy 508 MeV [17] to see if our calculation captures essential features of the measurement. Differences in the predictions of our relativistic and nonrelativistic calculations are already very pronounced at this energy.…”

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confidence: 99%

“…1 we chose selected outgoing proton laboratory angle pairs θ 1 −θ 2 from Ref. [17], which are symmetric around the beam axis. The cross sections are plotted against the laboratory kinetic energy of one of the outgoing protons.…”

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confidence: 99%

Relativistic effects in exclusive pd breakup scattering at intermediate energies

et al. 2008

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The relativistic Faddeev equation for three-nucleon scattering is formulated in momentum space and directly solved in terms of momentum vectors without employing a partial wave decomposition. Relativistic invariance is achieved by constructing a dynamical unitary representation of the Poincaré group on the three-nucleon Hilbert space. The exclusive breakup reaction at 508 MeV is calculated based on a Malfliet-Tjon type of two-body interaction and the cross sections are compared to measured cross sections at this energy. We find that the magnitude of the relativistic effects can be quite large and depends on the configurations considered. In spite of the simple nature of the model interaction, the experimental cross sections are in surprisingly good agreement with the predictions of the relativistic calculations. We also find that although for specific configurations the multiple scattering series converges rapidly, this is in general not the case.Key words: Relativistic Quantum Mechanics, Faddeev Equation, The Quantum Mechanical 24.10.Jv, Breakup reactions in the proton-deuteron (pd) system at intermediate energies have been studied experimentally quite intensively in recent decades. A prominent set of data can be found in the comprehensive overview of the experiments completed at Saturne-2 [1]. However, the theoretical interpretation faced and still faces serious challenges. At those energies pion production channels are open and nuclear resonances play a role. In contrast to the energy regime below the pion threshold, where high precision nucleonnucleon (NN) forces are established [2,3,4], and nuclear forces based on effective chiral dynamics are being developed [5] [8]. In addition, the standard partial wave decomposition, successfully applied below the pion-production threshold [9], is no longer an adequate numerical scheme due to the proliferation of the number of partial waves. Thus, the intermediate energy regime is a new territory for few-body calculations, which waits to be explored.The aim of this article is to address two aspects in that list of challenges: exact Poincaré invariance and calculations using vector variables instead of partial waves. In a series of publications [10] the technique of solving the nonrelativistic momentum-space Faddeev equation without partial waves has been mastered, for bound as well as scattering states. The Faddeev equation, based on a Poincaré invariant mass operator, has been formulated in detail in [11]. The resulting Faddeev equation has both kinematical and dynamical differences with respect to the corresponding nonrelativistic equation.The formulation of the theory is given in a representation of Poincaré invariant quantum mechanics where the interactions are invariant with respect to kinematic translations and rotations [12]. The model Hilbert space is a three-nucleon Hilbert space (thus not allowing for absorptive processes). The method used to introduce the NN interactions in the unitary representation of the Poincaré group allows to input high-precisi...

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“…For example, new experiments [4] prepared at the Thomas Jefferson National Accelerator Facility (TJNAF, USA) are expected to become an important step forward. 1.6 Walker (1994) [3] Qattan (2005) [24] Jones (2000) [18], Punjabi (2005) [20] Gayou (2002) [19], Puckett (2012) [23] Puckett (2010) [21] Fig. 1.…”

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confidence: 99%

Proton form factors and two-photon exchange in elastic electron-proton scattering

et al. 2015

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Proton electromagnetic form factors are among the most important sources of information about the internal structure of the proton. Two different methods for measuring these form factors, the method proposed by Rosenbluth and the polarization-transfer method, yield contradictory results. It is assumed that this contradiction can be removed upon taking into account the hard part of the contribution of two-photon exchange to the cross section for elastic electron-proton scattering. This contribution can measured experimentally via a precision comparison of the cross sections for the elastic scattering of positrons and electrons on protons. Such a measurement, performed at the VEPP-3 storage ring in Novosibirsk at the beam energies of 1.6 and 1.0 GeV for positron (electron) scattering angles in the ranges of θ e = 15 • −25 • and 55 • −75 • in the first case and in the range of θ e = 65 • −105 • in the second case is described in the present article. Preliminary results of this experiment and their comparison with theoretical predictions are described.

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H2(p,2p)n at 508 MeV: Recoil momenta≤200MeV/c

Cited by 21 publications

References 29 publications

Poincaré invariant three-body scattering at intermediate energies

Poincaré invariant three-body scattering at intermediate energies

Relativistic effects in exclusive pd breakup scattering at intermediate energies

Proton form factors and two-photon exchange in elastic electron-proton scattering

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